# US 2025/0145792 A1 · Polymer compositions having densification accelerators and rotational molding processes for making hollow articles therefrom

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- Number: US 2025/0145792 A1
- Document ID: US20250145792A1
- Status: Published application
- Kind: A1
- Application number: 18/726,075
- Filed: 2022-12-22
- Published: 2025-05-08
- Earliest claimed: 2022-01-01
- Assignees: Cytec Industries Inc.
- Applicants: Cytec Industries Inc.
- Inventors: Jerry Mon Hei Eng; Ram B. Gupta; Joseph Kozakiewicz; Jian-Yang Cho; Gregory Martin Treich
- Web page: https://patentgrep.com/patent/US20250145792A1

## CPC

- B29C 41/04: Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
- C08K 5/06: Ethers; Acetals; Ketals; Ortho-esters
- B29C 41/003: {characterised by the choice of material}
- B29C 41/042: {by rotating a mould around its axis of symmetry (for concrete B28B21/30)}
- C08K 5/098: Metal salts of carboxylic acids
- C08K 5/103: with polyalcohols
- C08K 5/1545: Six-membered rings
- C08K 5/17: Amines; Quaternary ammonium compounds
- C08K 5/34924: {containing cyanurate groups; Tautomers thereof}
- C08K 5/526: with hydroxyaryl compounds
- B29K 2023/06: {PE, i.e. polyethylene}
- B29K 2023/0625: {LLDPE, i.e. linear low density polyethylene}
- B29K 2077/00: Use of {PA, i.e.} polyamides, e.g. polyesteramides {or derivatives thereof}, as moulding material
- B29K 2105/0005: {containing compounding ingredients (releasing, lubricating or separating agents B29C33/56, fibers B29K2105/08, B29K2105/12; fillers B29K2105/16, recycled material B29K2105/26)}
- B29K 2105/0044: {Stabilisers, e.g. against oxydation, light or heat}
- B29L 2022/00: Hollow articles (tubular articles B29L2023/00; pneumatic tyres B29L2030/00)
- C08K 2201/014: Additives containing two or more different additives of the same subgroup in C08K
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

Rotational molding processes for producing hollow articles include the steps of: a) filling a mold with a polymer composition comprising: i) an organic polymer; and ii) a rotational molding densification accelerator (RMDA) selected from the group consisting of alkoxylated fatty alcohols, alkoxylated fatty esters, alkoxylated fatty amines, alkoxylated fatty amides, and combinations thereof; b) rotating the mold around at least one axis while heating the mold in an oven, thereby fusing the composition and spreading it to the walls of the mold; c) cooling the mold; and d) opening the mold; and e) removing the hollow article from the mold. The rotational molding processes using such polymer composition results in faster densification, which allows for reduction in overall cycle times for making the hollow articles.

## Claims

### Claim 1

A rotational molding process for producing a hollow article, the process comprising the steps of:
a) filling a mold with a polymer composition comprising:
i) an organic polymer; and
ii) a rotational molding densification accelerator (RMDA) selected from the group consisting of alkoxylated aliphatic alcohols, alkoxylated aliphatic esters, alkoxylated aliphatic amines, alkoxylated aliphatic amides, and combinations thereof;
b) rotating the mold around at least one axis while heating the mold in an oven, thereby fusing the composition and spreading it to the walls of the mold;
c) cooling the mold;
d) opening the mold; and
e) removing the hollow article from the mold.

### Claim 2 (depends on 1)

The process of claim 1, wherein visible air bubbles are substantially removed from the hollow article in a shorter time than a control polymer composition without the RMDA.

### Claim 3 (depends on 2)

The process of claim 2, wherein the shorter time is 5 to 50% less, preferably 10 to 40% less, than the time for the bubbles to be substantially removed from the control without the RMDA.

### Claim 4 (depends on 1, 2, 3)

The process of any of claims 1 to 3, wherein the peak internal air temperature (PIAT) of the mold is from 70° C. to 400° C.

### Claim 5 (depends on 1, 2, 3, 4)

The rotational molding process of any of claims 1 to 4, wherein the organic polymer comprises at least one of polyolefins, thermoplastic olefins (TPO), poly(ethylene-vinyl acetate) (EVA), polyesters, polyethers, polyketones, polyamides, natural and synthetic rubbers, polyurethanes, polystyrenes, polyacrylates, polymethacrylates, polybutyl acrylates, polyacetals, polyacrylonitriles, polybutadienes, acrylonitrile-butadiene-styrene (ABS), styrene-acrylonitrile (SAN), acrylonitrile-styrene-acrylate (ASA), cellulosic acetate butyrate, cellulosic polymers, polyimides, polyamideimides, polyetherimides, polyphenylene sulfides, polyphenylene oxides, polysulfones, polyethersulfones, polyvinyl chlorides, polycarbonates, amino resin cross-linked polyacrylates and polyesters, polyisocyanate cross-linked polyesters and polyacrylates, phenol/formaldehyde, urea/formaldehyde and melamine/formaldehyde resins, alkyd resins, polyester resins, acrylate resins cross-linked with melamine resins, urea resins, isocyanates, isocyanurates, carbamates, or epoxy resins, cross-linked epoxy resins derived from aliphatic, cycloaliphatic, heterocyclic, and aromatic glycidyl ethers, which are cross-linked with anhydrides or amines, polysiloxanes, Michael addition polymers, addition polymers of amines or blocked amines with activated unsaturated and activated methylene compounds, addition polymers of ketimines with activated unsaturated and activated methylene compounds, polyketimines in combination with unsaturated acrylic polyacetoacetate resins, coating compositions, radiation curable compositions, epoxy melamine resins, organic dyes, cosmetics, cellulose based paper, photographic film paper, fibers, waxes, or inks.

### Claim 6 (depends on 1, 2, 3, 4)

The process of any of claims 1 to 4, wherein the organic polymer comprises at least one of a polyolefin, polyolefin copolymer or terpolymer, polyamide, copolyamide, polyester, such as poly(ethylene terephthalate) or poly(butylene terephthalate), polystyrene, polycarbonate, polyacrylate, or poly(vinyl chloride).

### Claim 7 (depends on 1, 2, 3, 4)

The process of any of claims 1 to 4, wherein the organic polymer comprises at least one of a polyamide or copolyamide.

### Claim 8 (depends on 1, 2, 3, 4, 5)

The process of any of claims 1 to 5, wherein the organic polymer comprises a polyolefin.

### Claim 9 (depends on 8)

The process of claim 8, wherein the polyolefin comprises at least one of polyethylene or polypropylene.

### Claim 10 (depends on 8)

The process of claim 8, wherein the polyolefin comprises at least one of linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), or high density polyethylene (HDPE).

### Claim 11 (depends on 8)

The process of claim 8, wherein the polyolefin comprises polyethylene prepared by catalytic polymerization using a metallocene catalyst.

### Claim 12 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11)

The process of any of claims 1 to 11, wherein the polymer composition comprises 0.001 to 5 wt. %, preferably 0.01 to 2 wt. %, and more preferably 0.01 to 1 wt. %, based on the weight of the polymer composition, of the RMDA.

### Claim 13 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)

The process of any of claims 1 to 12, wherein the RMDA is at least one alkoxylated aliphatic alcohol according to Formula (I):
R—(OCHR1CH2)y—OH (I),
wherein R is C12-C60 hydrocarbyl;
R1 is H or C1-C4 alkyl; and
y is an integer from 1 to 100.

### Claim 14 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)

The process of any of claims 1 to 13, wherein the RMDA is at least one ethoxylated aliphatic ether according to Formula (Ia):
R—(OCH2CH2)y—OH (Ia),
wherein R is C12-C60 hydrocarbyl; and
y is an integer from 2 to 60.

### Claim 15 (depends on 13, 14)

The process of claim 13 or 14, wherein R is derived from a fatty alcohol having the same number of carbon atoms.

### Claim 16 (depends on 13, 14, 15)

The process of any of claims 13 to 15, wherein the RMDA is at least one of an ethoxylated and/or propoxylated laurel alcohol, C12-C13 alcohol, C12-C14 secondary alcohol, C12-C15 oxo alcohol, tridecyl alcohol, cetyl alcohol, C16/C18 alkyl alcohol, stearyl alcohol, oleyl alcohol, docosyl alcohol, or saturated, linear C20-C50 synthetic alcohol.

### Claim 17 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)

The process of any of claims 1 to 12, wherein the RMDA is at least one alkoxylated aliphatic ester according to Formula (II):
wherein R6 is C1-C59 hydrocarbyl;
R′ is H or C1-C4 alkyl; and
y is an integer from 1 to 100.

### Claim 18 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)

The process of any of claims 1 to 12, wherein the RMDA is at least one ethoxylated aliphatic ester according to Formula (IIa):
wherein R7 is C1-C29 hydrocarbyl; and
y is an integer from 2 to 60.

### Claim 19 (depends on 17, 18)

The process of claim 17 or 18, wherein the RMDA is at least one of an ethoxylated and/or propoxylated laurate, C16-C18 alkanoate, stearate, oleate, or tallowate.

### Claim 20 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)

The process of any of claims 1 to 12, wherein the RMDA is at least one alkoxylated aliphatic amine according to Formula (III):
R4—NR2R3 (III), or
alkoxylated aliphatic amide according to Formula (IV):
wherein R4 of Formula (III) is a C8-C60 hydrocarbyl and R5 of Formula (IV) is a C7-C59 hydrocarbyl, each optionally interrupted by one or more heteroatom;
R2 and R3 of Formula (III) and Formula (IV) are each independently H, C1-C30 alkyl, or —(CH2CHR1O)n—H;
at least one of R2 or R3 of Formula (III) and Formula (IV) is —(CH2CHR1O)n—H;
R1 is H or methyl; and
each n is independently an integer from 1 to 100.

### Claim 21 (depends on 20)

The process of claim 20, wherein R4 of Formula (III) is C8-C36 alkyl and R5 of Formula (IV) is a C7-C35 alkyl, both optionally interrupted by one or more heteroatom.

### Claim 22 (depends on 20)

The process of claim 20, wherein R4 of Formula (III) is C12-C30 alkyl and R5 of Formula (IV) is a C1i-C29 alkyl, optionally interrupted by one or more heteroatom.

### Claim 23 (depends on 20, 21, 22)

The process of any of claims 20 to 22, wherein each n is independently an integer from 1 to 10.

### Claim 24 (depends on 20, 21, 22, 23)

The process of any of claims 20 to 23, wherein R4 of Formula (III) is derived from a fatty acid having the same number of carbon atoms, and R5 of Formula (IV) is derived from a fatty acid having one more carbon atom.

### Claim 25 (depends on 20, 21, 22, 23, 24)

The process of any of claims 20 to 24, wherein the RMDA is at least one of an ethoxylated and/or propoxylated stearyl amine, oleyl amine, tallow amine, hydrogenated tallow amine, cetyl amine, capryl amine, or coco amine.

### Claim 26 (depends on 20, 21, 22, 23, 24)

The process of any of claims 20 to 24, wherein the RMDA is at least one of cocoamide monoethanol amine, cocoamide diethanol amine, a cocoamide ethoxylate; lauramide diethanol amine; oleamide diethanol amine, or oleic acid monoethanol amide.

### Claim 27 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)

The process of any of claims 1 to 26, wherein the polymer composition further comprises an organic phosphite or phosphonite.

### Claim 28 (depends on 27)

The process of claim 27, wherein the phosphite or phosphonite is at least one of:
i) a compound according to any of Formulae (1) to (7):
wherein:
the indices are integral and n is 2, 3 or 4; p is 1 or 2; q is 2 or 3; y is 1, 2 or 3; and z is 1 to 6;
A1, if n or q is 2, is C2-C12 alkylene; C2-C12 alkylene interrupted by oxygen, sulfur or —NR4—, a radical of the formulae:
or phenylene;
A1, if n or q is 3, is a divalent radical of the formula —CrH2r-1—, wherein r is an integer from 4 to 12;
A1, if n is 4, is
B is a direct bond, —CH2—, —CHR4—, —CR1R4—, sulfur, C5-C7 cycloalkylidene, or cyclohexylidene which is substituted by from 1 to 4 C1-C4 alkyl radicals in position 3, 4 and/or 5;
D1, if p is 1, is C1-C4 alkyl and, if p is 2, is —CH2OCH2—;
D2 is C1-C4 alkyl;
E, if y is 1, is C1-C18 alkyl, —OR1 or halogen;
E, if y is 2, is —O-A2-O—, wherein A2 is as defined for A1 when n is 2;
E, if y is 3, is a radical of the formula R4C(CH2O)3 or N(CH2CH2O—)3;
Q is the radical of an at least z-valent mono- or poly-alcohol or phenol, this radical being attached via the oxygen atom of the OH group of the mono- or poly-alcohol or phenol to the phosphorus atom;
R1, R2 and R3 are each independently C1-C18 alkyl which is unsubstituted or substituted by halogen, —COOR4, —CN or —CONR4R4; C2-C18 alkyl interrupted by oxygen, sulfur or —NR4—; C7-C9 phenylalkyl; C5-C12 cycloalkyl, phenyl or naphthyl; naphthyl or phenyl substituted by halogen, 1 to 3 alkyl radicals or alkoxy radicals having a total of 1 to 18 carbon atoms or by C7-C9 phenylalkyl; or a radical of the formula
in which m is an integer from the range 3 to 6;
R4 is hydrogen, C1-C8 alkyl, C5-C12 cycloalkyl or C7-C9 phenylalkyl;
R5 and R6 are each independently hydrogen, C1-C8 alkyl or C5-C6 cycloalkyl,
R7 and R8, if q is 2, are each independently C1-C4 alkyl or together are a 2,3-dehydropentamethylene radical; and R7 and R8, if q is 3, are each methyl;
each instance of R14 is independently chosen from hydrogen, C1-C9 alkyl or cyclohexyl;
each instance of R15 is independently hydrogen or methyl;
X and Y are each a direct bond or oxygen;
Z is a direct bond, methylene, —C(R16)2— or sulfur, and
R16 is C1-C8 alkyl; or
ii) a trisarylphosphite according to Formula 8:
wherein:
R17 is a substituent present at from 0 to 5 positions of the aromatic ring of Formula 8 and is independently C1-C20 alkyl, C3-C20 cycloalkyl, C4-C20 alkyl cycloalkyl, C6-C10 aryl, or C7-C20 alkylaryl.

### Claim 29 (depends on 27)

The process of claim 27, wherein the phosphite or phosphonite is at least one of:
triphenyl phosphite,
diphenyl alkyl phosphites,
phenyl dialkyl phosphites,
trilauryl phosphite,
trioctadecyl phosphite,
distearyl pentaerythritol phosphite,
tris(2,4-di-tert-butylphenyl) phosphite (IRGAFOS™ 168),
tris(4-nonylphenyl) phosphite,
a compound of Formulae (A), (B), (C), (D), (E), (F), (G), (H), (J), (K), or (L):
2-butyl-2-ethyl-1,3-propanediol 2,4,6-tri-tert-butylphenol phosphite,
bis(2,6-di-tert-butyl-4-methlphenyl) pentaerythritol diphosphite,
2-butyl-2-ethyl-1,3-propanediol 2,4-di-cumylphenol phosphite,
2-butyl-2-ethyl-1,3-propanediol 4-methyl-2,6-di-tert-butylphenol phosphite, or
bis(2,4,6-tri-tert-butyl-phenyl) pentaerythritol diphosphate.

### Claim 30 (depends on 27)

The process of claim 27, wherein the organic phosphite or phosphonite is at least one of tris(2,4-di-tert-butylphenyl)phosphite (IRGAFOS™ 168), bis(2,4-dicumylphenyl)pentaerythritol diphosphite (DOVERPHOS™ S9228), tetrakis(2,4-di-tert-butylphenyl)-4,4′-biphenylene-diphosphonite (IRGAFOS™ P-EPQ), tris(4-nonylphenyl) phosphite, triphenyl phosphite, trilauryl phosphite, trioctadecyl phosphite, or distearyl pentaerythritol phosphite.

### Claim 31 (depends on 27, 28, 29, 30)

The process of any of claims 27 to 30, wherein the polymer composition comprises 0.001 to 5 wt. %, preferably 0.005 to 3 wt. %, and more preferably 0.01 to 1 wt. %, of the organic phosphite or phosphonite, based on the weight of the polymer composition.

### Claim 32 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)

The process of any of claims 1 to 31, wherein the polymer composition further comprises a hindered phenol.

### Claim 33 (depends on 32)

The process of claim 32, wherein the hindered phenol has at least one group according to Formulae (IVa), (IVb), or (IVc):
wherein:
“” indicates the point of attachment (via a carbon-carbon single bond) of the molecular fragment to a parent compound;
R18 of Formula (IVa), (IVb), and (IVc) is independently hydrogen or C1-4 hydrocarbyl;
each of R19 and R20 of Formula (IVa), (IVb), and (IVc) is independently hydrogen or C1-C20 hydrocarbyl; and
R37 of Formula (IVa), (IVb), and (IVc) is C1-C12 hydrocarbyl.

### Claim 34 (depends on 33)

The process of claim 33, wherein R18 and R37 are each independently methyl or tert-butyl.

### Claim 35 (depends on 32)

The process of claim 32, wherein the hindered phenol is at least one of: 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene (ETHANOX™ 330), bis-(3,5-di-tert-butyl-4-hydroxybenzyl)sulfide, 1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate (ETHANOX™ 314), 1,3,5-tris-(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanurate (CYANOX™ 1790), dioctadecyl 3,5-di-tert-butyl-4-hydroxybenzylphosphonate, esters of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid with monohydric or polyhydric alcohols, for example methanol, octadecanol (IRGANOX™ 1076), 1,6-hexanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol (IRGANOX™ 1010), tris-(hydroxyethyl)isocyanurate and N,N′-bis-(hydroxyethyl)oxamide, esters of β-(5-tert-butyl-4-hydroxy-3-methylphenyl)propionic acid with monohydric or polyhydric alcohols, for example methanol, octadecanol, 1,6-hexanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris-(hydroxyethyl)isocyanurate and N,N′-bis-(hydroxyethyl)-oxamide, amides of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, for example N,N′-bis-(3,5-di-tert-butyl-4-hydroxyphenyl-propionyl)-hexamethylenediamine, or N,N′-bis-(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)-trimethylenediamine.

### Claim 36 (depends on 32, 33, 34, 35)

The process of any of claims 32 to 35, wherein the polymer composition comprises from 0.001 to 5 wt. %, preferably 0.005 to 2 wt. %, and more preferably 0.01 to 1 wt. %, of the hindered phenol, based on the weight of the polymer composition.

### Claim 37 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)

The process of any of claims 1 to 36, wherein the polymer composition further comprises 0.01 to 1 wt. % of at least one of zinc stearate, calcium stearate, zinc oxide, hydrotalcite, or hydrocalumite.

### Claim 38 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)

The process of any of claims 1 to 37, wherein the polymer composition further comprises 0.01 to 25 wt. %, preferably 0.01 to 10 wt. %, preferably 0.02 to 5 wt. %, and more preferably 0.05 to 3 wt. %, based on the weight of the polymer composition, of at least one tocopherol, tocopherol ester, hydroxylamine, tertiary amine oxide, hindered amine light stabilizer (HALS), ultraviolet light absorber (UVA), hindered benzoate, thiosynergist, benzofuranone, indolinone, nitrone, or nickel phenolate.

### Claim 39 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)

The process of any of claims 1 to 38, wherein the polymer composition further comprises at least one of α-tocopherol, β-tocopherol, γ-tocopherol, δ-tocopherol, or esters thereof.

### Claim 40 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)

The process of any of claims 1 to 38, wherein the polymer composition further comprises α-tocopherol (Vitamin E).

### Claim 41 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)

The process of any of claims 1 to 38, wherein the tocopherol comprises α-tocopherol acetate (Vitamin E acetate).

### Claim 42 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)

The process of any of claims 1 to 41, wherein the polymer composition further comprises at least one hydroxylamine or tertiary amine oxide.

### Claim 43 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)

The process of any of claims 1 to 42, wherein the polymer composition further comprises at least one of N,N-dibenzylhydroxylamine,
N,N-diethylhydroxylamine, N,N-dioctylhydroxylamine, N,N-dilaurylhydroxylamine,
N,N-didodecylhydroxylamine, N,N-ditetradecylhydroxylaamine,
N,N-dihexadecylhydroxylamine, N,N-dioctadecylhydroxylamine N-hexadecyl-N-tetradecylhydroxylamine,
N-hexadecyl-N-heptadecylhydroxylamine, N-hexadecyl-N-octadecylhydroxylamine,
N-heptadecyl-N-octadecylhydroxylamine, or
N,N-di(hydrogenated tallow)hydroxylamine (IRGASTAB™ FS-042).

### Claim 44 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)

The process of any of claims 1 to 42, wherein the polymer composition further comprises N,N-di(hydrogenated tallow)hydroxylamine (IRGASTAB™ FS-042).

### Claim 45 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)

The process of any of claims 1 to 44, wherein the polymer composition further comprises a hindered amine light stabilizer (HALS).

### Claim 46 (depends on 45)

The polymer composition of claim 45, wherein the hindered amine light stabilizer (HALS) is at least one of:
bis(2,2,6,6-tetramethylpiperidin-4-yl) sebacate (TINUVIN™ 770);
bis(2,2,6,6-tetramethylpiperidin-4-yl) succinate;
bis(1,2,2,6,6-pentamethylpiperidin-4-yl) sebacate;
bis(1-octyloxy-2,2,6,6-tetramethylpiperidyl) succinate;
bis(1-octyloxy-2,2,6,6-tetramethylpiperidin-4-yl) sebacate (TINUVIN™ 123);
bis(1,2,2,6,6-pentamethylpiperidin-4-yl) n-butyl 3,5-di-tert-butyl-4-hydroxybenzylmalonate;
a condensate of 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid (TINUVIN™ 622);
2,2,6,6-tetramethylpiperidin-4-yl stearate;
2,2,6,6-tetramethylpiperidin-4-yl dodecanate;
1,2,2,6,6-pentamethylpiperidin-4-yl stearate;
1,2,2,6,6-pentamethylpiperidin-4-yl dodecanate;
a condensate of N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine and 4-tert-octylamino-2,6-dichloro-1,3,5-triazine (CHIMASSORB™ 944);
tris(2,2,6,6-tetramethylpiperidin-4-yl) nitrilotriacetate;
4-stearyloxy-2,2,6,6-tetramethylpiperidine;
a condensate of N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine and 4-morpholino-2,6-dichloro-1,3,5-triazine (CYASORB™ UV-3346);
a condensate of N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine and 4-morpholino-2,6-dichloro-1,3,5-triazine, methylated (CYASORB™ UV-3529);
a condensate of 2-chloro-4,6-bis(4-n-butylamino-2,2,6,6-tetramethylpiperidyl)-1,3,5-triazine and 1,2-bis(3-aminopropylamino)ethane (CHIMASSORB™ 119);
a condensate of 2-chloro-4,6-bis(4-n-butylamino-1,2,2,6,6-pentamethylpiperidyl)-1,3,5-triazine and 1,2-bis-(3-aminopropylamino)ethane;
a condensate of N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine, N-butyl-2,2,6,6-tetramethyl-4-piperidinamine, di-n-butyl amine, and 2,4,6-trichloro-1,3,5-triazine (CHIMASSORB™ 2020);
a mixture of 4-hexadecyloxy- and 4-stearyloxy-2,2,6,6-tetramethylpiperidine (CYASORB™ UV-3853);
a mixture of 4-hexadecyloxy- and 4-stearyloxy-1,2,2,6,6-pentamethylpiperidine;
a condensate of N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine and 4-cyclohexylamino-2,6-dichloro-1,3,5-triazine;
a condensate of 1,2-bis(3-aminopropylamino)ethane, 2,4,6-trichloro-1,3,5-triazine, and 4-butylamino-2,2,6,6-tetramethylpiperidine;
a condensate of N,N′-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylenediamine and 4-cyclohexylamino-2,6-dichloro-1,3,5-triazine;
tetrakis(2,2,6,6-tetramethylpiperidin-4-yl)-1,2,3,4-butanetetracarboxylate;
tetrakis(1,2,2,6,6-pentamethylpiperidin-4-yl)-1,2,3,4-butanetetracarboxylate;
1,2,3,4-butanetetracarboxylic acid, 2,2,6,6-tetramethylpiperidinyl-4-yl tridecyl ester;
1,2,3,4-butanetetracarboxylic acid, 1,2,2,6,6-pentamethylpiperidin-4-yl tridecyl ester;
formamide, N,N′-1,6-hexanediylbis[N-(2,2,6,6-tetramethylpiperidin-4-yl) (UVINUL™ 4050);
a condensate of N,N′-bis(2,2,6,6-tetramethyl-1-(propyloxy)-piperidin-4-yl)hexamethylenediamine, N-butyl-1-propyloxy-2,2,6,6-tetramethyl-4-piperidinamine, di-n-butyl amine, and 2,4,6-trichloro-1,3,5-triazine (TINUVIN™ NOR HALS 371);
N,N′-bis(2,2,6,6-tetramethyl-4-piperidin-4-yl)hexamethylene diamine, polymer with 2,4,6-trichloro-1,3,5-triazine, reaction products with 3-bromo-1-propene, di-n-butylamine, and N-butyl-2,2,6,6-tetramethyl-4-piperidinamine, oxidized, hydrogenated (TINUVIN™ XT 200);
TINUVIN™ XT-850/XT-855); or
N1,N1′-1,2-ethanediylbis(1,3-propanediamine), reaction products with cyclohexane and peroxidized N-butyl-2,2,6,6-tetramethyl-4-piperidinamine-2,4,6-trichloro-1,3,5-triazine (FLAMESTAB™ NOR 116).

### Claim 47 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)

The process of any of claims 1 to 46, wherein the polymer composition further comprises an ultraviolet light absorber (UVA).

### Claim 48 (depends on 47)

The process of claim 47, wherein the ultraviolet light absorber is at least one of a 2-hydroxybenzophenone, a 2-(2′-hydroxyphenyl)benzotriazole, a 2-(2′-hydroxyphenyl)-s-triazine, or a benzoxazinone.

### Claim 49 (depends on 47)

The process of claim 47, wherein the ultraviolet light absorber is a 2-(2′-hydroxyphenyl)-s-triazine.

### Claim 50 (depends on 49)

The process of claim 49, wherein the 2-(2′-hydroxyphenyl)-s-triazine is at least one of:
4,6-diphenyl-2-(4-hexyloxy-2-hydroxyphenyl)-s-triazine (TINUVIN™ 1577),
4,6-bis-(2,4-dimethylphenyl)-2-(2-hydroxy-4-octyloxyphenyl)-s-triazine (CYASORB™ 1164),
2,4-bis[2-hydroxy-4-(2-hydroxy-4-(2-hydroxyethoxy)phenyl]-6-(2,4-dimethylphenyl)-s-triazine,
mixture of 4,6-bis(2,4-dimethylphenyl)-2-(2-hydroxy-4-(3-dodecyloxy-2-hydroxypropoxy)phenyl)-s-triazine and 4,6-bis-(2,4-dimethylphenyl)-2-(2-hydroxy-4-(3-tridecyloxy-2-hydroxypropoxy)phenyl)-s-triazine (TINUVIN™ 400),
4,6-bis(2,4-dimethylphenyl)-2-(2-hydroxy-4(3-(2-ethylhexyloxy)-2-hydroxypropoxy)-phenyl)-s-triazine (TINUVIN™ 405),
4,6-bis(2,4-dimethylphenyl)-2-(2-hydroxy-4(3-(2-ethylhexyloxy)-2-hydroxypropoxy)-phenyl)-s-triazine,
2,4-bis(2,4-dimethylphenyl)-6-[2-hydroxy-4-[(octyloxycarbonyl)ethylideneoxy]phenyl]-s-triazine (TINUVIN™ 479),
2,4-bis(4-biphenylyl)-6-[2-hydroxy-4-[(octyloxycarbonyl)ethylideneoxy]phenyl]-s-triazine,
2,4-bis(4-biphenylyl)-6-[2-hydroxy-4-(2-ethylhexyloxy)phenyl]-s-triazine (TINUVIN™ 1600),
2,4-bis(2-hydroxy-4-butyloxyphenyl)-6-(2,4-bis-butyloxyphenyl)-s-triazine (TRIAZINE™ 460),
2,4,6-tris[2-hydroxy-4-(3-sec-butyloxy-2-hydroxypropyloxy)-phenyl]-s-triazine, or
2,4,6-tris[2-hydroxy-4-[(octyloxycarbonyl)ethylideneoxy]phenyl]-s-triazine (TINUVIN™ 477).

### Claim 51 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)

The process of any of claims 1 to 50, wherein the polymer composition further comprises at least one of a metal chelating agent, nucleating agent, lubricant, plasticizer, compatibilizer, blowing agent, flame retardant, anti-block agent, slip agent, anti-static agent, filler, reinforcing agent, metal oxide, optical brightener, dye, or pigment.

### Claim 52 (depends on 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)

A hollow article prepared by the process of any of claims 1 to 51.

### Claim 53

Use of a rotational molding densification accelerator (RMDA) selected from the group consisting of alkoxylated aliphatic alcohols, alkoxylated aliphatic esters, alkoxylated aliphatic amines, alkoxylated aliphatic amides, and combinations thereof, in a rotational molding process for producing a hollow article.