# US 11,111,365 B2 · Polyolefin structure

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- Number: US 11,111,365 B2
- Document ID: US11111365B2
- Status: Granted
- Kind: B2
- Application number: 16/340,794
- Filed: 2017-09-19
- Published: 2020-02-13
- Granted: 2021-09-07
- Earliest claimed: 2016-10-14
- Assignees: Mitsubishi Gas Chemical Company, Inc.
- Applicants: Mitsubishi Gas Chemical Company, Inc.
- Inventors: Tomonori Kato; Kenji Kouno
- Web page: https://patentgrep.com/patent/US11111365B2

## CPC

- C08L 23/06: Polyethylene
- B29C 49/0005: {characterised by the material}
- B65D 1/0207: {characterised by material, e.g. composition, physical features}
- C08G 69/26: derived from polyamines and polycarboxylic acids
- C08J 3/201: {Pre-melted polymers}
- C08K 3/22: of metals
- C08L 23/02: not modified by chemical after-treatment
- C08L 23/26: modified by chemical after-treatment (saponified copolymers C08L23/0861; unsaturated acid salts C08L23/0876)
- C08L 77/06: Polyamides derived from polyamines and polycarboxylic acids (C08L77/10 takes precedence)
- B29K 2023/065: {HDPE, i.e. high density polyethylene}
- B29K 2077/00: Use of {PA, i.e.} polyamides, e.g. polyesteramides {or derivatives thereof}, as moulding material
- B29L 2031/712: {Containers; Packaging elements or accessories, Packages (closures therefor B29L2031/56; ink or toner cartridges B29L2031/7678; squeeze tubes B29L2023/20; suitcases B29L2031/7418)}
- C08L 2201/14: Gas barrier composition
- C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
- C08L 2205/03: containing three or more polymers in a blend
- C08L 2205/035: containing four or more polymers in a blend
- C08L 2207/062: HDPE
- C08L 2310/00: Masterbatches
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- 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)
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- 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

A polyolefin-based structure includes 60 to 97% by mass of a polyolefin (A), 1 to 35% by mass of an acid-modified polyolefin (B), and 2 to 35% by mass of a polyamide resin (C), in which the polyamide resin (C) is dispersed in a layered form in the polyolefin (A), and the polyamide resin (C) is a melt-kneaded product of 30 to 70% by mass of a polyamide (X) that contains a diamine unit containing 70 mol % or more of a m-xylylenediamine unit and a dicarboxylic acid unit containing an α,ω-linear aliphatic dicarboxylic acid unit and 30 to 70% by mass of an aliphatic polyamide (Y) (provided that a total of the polyamide (X) and the polyamide (Y) is taken as 100% by mass), and a difference between a melting point Tm0 of the polyamide (X) as observed by differential scanning calorimetry and a melting point Tm1 derived from the polyamide (X) in the polyamide resin (C), is 0.1 to 2.5° C.

## Claims

### Claim 1

A polyolefin-based structure comprising 60 to 97% by mass of an unmodified polyolefin (A), 1 to 35% by mass of an acid-modified, polyolefin (B), and 2 to 35% by mass of a polyamide resin (C), wherein the polyamide resin (C) is dispersed in a layered form in the unmodified polyolefin (A) and the acid-modified polyolefin (B), and the polyamide resin (C) is a melt-kneaded product of 30 to 70% by mass of a polyamide (X) that contains a diamine unit containing 70 mol % or more of a m-xylylenediamine unit and a dicarboxylic acid unit containing an α,ω-linear aliphatic dicarboxylic acid unit and 30 to 70% by mass of an aliphatic polyamide (Y), provided that a total of the polyamide (X) and the polyamide (Y) is taken as 100% by mass, and a difference between a melting point Tmo of the polyamide (X) prior to melt kneading as observed by differential scanning calorimetry and a melting point Tm1 derived from the polyamide (X) in the polyamide resin (C), is from 0.1 to 2.5° C.

### Claim 2 (depends on 1)

The polyolefin-based structure according to claim 1, further comprising a light-shielding material (D) in an amount of more than 0% by mass and 10% by mass or less.

### Claim 3 (depends on 2)

The polyolefin-based structure according to claim 2, wherein the light-shielding material (D) is titanium oxide.

### Claim 4 (depends on 1)

The polyolefin-based structure according to claim 1, wherein the α,ω-linear aliphatic dicarboxylic acid unit in the polyamide (X) has from 4 to 20 carbon atoms.

### Claim 5 (depends on 4)

The polyolefin-based structure according to claim 4, wherein the am-linear aliphatic dicarboxylic acid unit in the polyamide (X) is an adipic acid unit.

### Claim 6 (depends on 1)

The polyolefin-based structure according to claim 1, wherein the dicarboxylic acid unit in the polyamide (X) contains the am-linear aliphatic dicarboxylic acid unit and an isophthalic acid unit in a total amount of 70 mol % or more based on the amount of dicarboxylic acid unit in the polyamide (X), and a molar ratio of the α,ω-linear aliphatic dicarboxylic acid unit to the isophthalic acid unit is from 20:80 to 100:0.

### Claim 7 (depends on 1)

The polyolefin-based structure according to claim 1, wherein the aliphatic polyamide (Y) is one or more selected from the group consisting of Nylon 6, Nylon 6,6, and Nylon 6,6/6.

### Claim 8 (depends on 1)

The polyolefin-based structure according to claim 1, wherein a melt flow rate of the acid-modified polyolefin (B) is from 0.1 to 10 g/10 min.

### Claim 9 (depends on 1)

The polyolefin-based structure according to claim 1, wherein an acid value of the acid-modified polyolefin (B) is from 5 to 30 mgKOH/g.

### Claim 10 (depends on 1)

The polyolefin-based structure according to claim 1, wherein a density of the acid-modified polyolefin (B) is from 0.910 to 0.970 g/cm3.

### Claim 11 (depends on 1)

The polyolefin-based structure according to claim 1, which is a container.

### Claim 12 (depends on 1)

A method for producing the polyolefin-based structure according to claim 1, comprising:
step (1): melt-kneading 30 to 70% by mass of the polyamide (X) that contains the diamine unit containing 70 mol % or more of the m-xylylenediamine unit and the dicarboxylic acid unit containing the α,ω-linear aliphatic dicarboxylic acid unit and 30 to 70% by mass of the aliphatic polyamide (Y), provided that a total of the polyamide (X) and the polyamide (Y) is taken as 100% by mass, at a temperature of the melting point Tmo of the polyamide (X)+10° C. or more and Tmo+60° C. or less to thereby obtain the polyamide resin (C); and
step (2): molding a resin composition containing 60 to 97% by mass of the unmodified polyolefin (A), 1 to 35% by mass of the acid-modified polyolefin (B), and 2 to 35% by mass of the polyamide resin (C) to thereby obtain a polyolefin-based structure.

### Claim 13 (depends on 12)

The method for producing the polyolefin-based structure of claim 12, wherein the molding method in step (2) is a direct blow method.