# US 2020/0399468 A1 · Polyamide composition for liquid-assisted injection moulding applications

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- Number: US 2020/0399468 A1
- Document ID: US20200399468A1
- Status: Published application
- Kind: A1
- Application number: 16/969,433
- Filed: 2019-02-13
- Published: 2020-12-24
- Earliest claimed: 2018-02-14
- Applicants: BASF SE
- Inventors: Huanbing WANG
- Web page: https://patentgrep.com/patent/US20200399468A1

## CPC

- C08L 77/06: Polyamides derived from polyamines and polycarboxylic acids (C08L77/10 takes precedence)
- B29C 45/1704: {the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles (B29C45/1732 and B29C45/1734 take precedence; injection blow-moulding B29C49/06)}
- C08G 69/06: Solid state polycondensation
- C08G 69/14: Lactams
- C08G 69/265: {from at least two different diamines or at least two different dicarboxylic acids}
- C08K 3/40: Glass
- C08K 5/005: {Stabilisers against oxidation, heat, light, ozone}
- C08K 5/0066: {Flame-proofing or flame-retarding additives}
- C08K 7/06: Elements
- C08K 7/10: Silicon-containing compounds
- C08K 7/14: Glass
- C08K 7/20: Glass
- C08L 77/02: Polyamides derived from omega-amino carboxylic acids or from lactams thereof (C08L77/10 takes precedence)
- C08L 2203/18: used for pipes
- C08L 2203/30: used for thermoforming
- C08L 2205/02: containing two or more polymers of the same C08L -group
- C08L 2205/035: containing four or more polymers in a blend
- 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)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

The disclosure relates to a polyamide composition including (i) at least one aliphatic polyamide comprising repeating units derived from the polycondensation of hexamethylenediamine and adipic acid; (ii) at least one semi-aromatic polyamide comprising repeating units derived from the polycondensation of hexamethylenediamine, adipic acid and at least one aromatic dicarboxylic acid; (iii) at least one fibrous filler; (iv) at least one particulate filler; (v) at least one heat stabilizer; and (vi) at least one further additive. The polyamide composition exhibits excellent processing properties in the preparation of articles using liquid-assisted injection moulding processes.

## Claims

### Claim 1

A polyamide composition comprising:
(i) at least one aliphatic polyamide comprising repeating units derived from a polycondensation of hexamethylenediamine and adipic acid;
(ii) at least one semi-aromatic polyamide comprising repeating units derived from a polycondensation of hexamethylenediamine, adipic acid and at least one aromatic dicarboxylic acid;
(iii) at least one fibrous filler;
(iv) at least one particulate filler;
(v) at least one heat stabilizer;
(vi) at least one further additive;
(vii) optionally at least one polyamide selected from homopolymers of ϵ-caprolactam (PA6), copolymers of ϵ-caprolactam with hexamethylenediamine and terephthalic acid and copolymers of ϵ-caprolactam with hexamethylenediamine and isophthalic acid; and
(viii) optionally at least one polyamide selected from homopolymers of hexamethylenediamine and sebacic acid (PA6.10).

### Claim 2 (depends on 1)

The polyamide composition according to claim 1, wherein the at least one semi-aromatic polyamide comprises repeating units derived from at least one aromatic dicarboxylic acid in an amount of at least 5 mol.-%, based on a total weight of the at least one semi-aromatic polyamide.

### Claim 3 (depends on 1)

The polyamide composition according to claim 1, wherein the at least one semi-aromatic polyamide is selected from homopolymers and/or copolymers of hexamethylenediamine and adipic acid with terephthalic acid and/or isophthalic acid.

### Claim 4 (depends on 1)

The polyamide composition according to claim 1, wherein the at least one semi-aromatic polyamide is selected from copolymers of hexamethylenediamine, adipic acid and terephthalic acid (PA6.6/6.T), copolymers of hexamethylenediamine, adipic acid and isophthalic acid (PA6.6/6.I), copolymers of hexamethylenediamine, adipic acid, terephthalic acid and isophthalic acid (PA6.6/6.T/6.I) and mixtures of these semi-aromatic polyamides.

### Claim 5 (depends on 1)

The polyamide composition according to claim 1, wherein the at least one aliphatic polyamide is selected from homopolymers of hexamethylenediamine and adipic acid (PA6.6), copolymers of hexamethylenediamine, adipic acid and ϵ-caprolactam (PA6.6/6) and mixtures of these aliphatic polyamides.

### Claim 6 (depends on 1)

The polyamide composition according to claim 1, wherein the at least one fibrous filler is selected from glass fibres, ceramic fibres, carbon fibres, and thermostable polymer fibres.

### Claim 7 (depends on 1)

The polyamide composition according to claim 1, wherein the at least one particulate filler is selected from mineral fillers, glass beads, glass flakes, and milled glass fibres.

### Claim 8 (depends on 1)

The polyamide composition according to claim 1, wherein the at least one fibrous filler is selected from glass fibres and the at least particulate filler is selected from glass beads.

### Claim 9 (depends on 1)

The polyamide composition according to claim 1, wherein the at least one additive is selected from colorants, mould release agents, flame retardants, toughening modifiers, and additives to facilitate the mixing of the components or the moulding of the composition.

### Claim 10 (depends on 1)

The polyamide composition according to claim 1, further comprising:
(i) 40 to 70 wt.-%, based on a total weight of the polyamide composition, of the at least one aliphatic polyamide comprising repeating units derived from the polycondensation of hexamethylenediamine and adipic acid;
(ii) 4 to 30 wt.-%, based on the total weight of the polyamide composition, of the at least one semi-aromatic polyamide comprising repeating units derived from the polycondensation of hexamethylenediamine, adipic acid and at least one aromatic dicarboxylic acid;
(iii) 10 to 40 wt.-%, based on the total weight of the polyamide composition, of the at least one fibrous filler;
(iv) 1 to 20 wt.-%, based on the total weight of the polyamide composition, of the at least one particulate filler;
(v) 0.1 to 2 wt.-%, based on the total weight of the polyamide composition, of the at least one heat stabilizer;
(vi) 0.1 to 2 wt.-%, based on the total weight of the polyamide composition, of the at least one further additive;
(vii) 0 to 20 wt.-%, based on the total weight of the polyamide composition, of the at least one polyamide selected from homopolymers of ϵ-caprolactam (PA6), copolymers of ϵ-caprolactam with hexamethylenediamine and terephthalic acid and copolymers of ϵ-caprolactam with hexamethylenediamine and isophthalic acid; and
(viii) 0 to 20 wt.-%, based on the total weight of the polyamide composition, of the at least one polyamide selected from homopolymers of hexamethylenediamine and sebacic acid (PA6.10).

### Claim 11 (depends on 10)

The polyamide composition according to claim 10, wherein the at least one aliphatic polyamide is selected from homopolymers of hexamethylenediamine and adipic acid (PA6.6) and copolymers of hexamethylenediamine, adipic acid and ϵ-caprolactam (PA6.6/6) and wherein only the repeating units derived from hexamethylenediamine and adipic acid account to an amount of 40 to 70 wt.-% of the at least one aliphatic polyamide based on the total weight of the polyamide composition.

### Claim 12

(canceled)

### Claim 13 (depends on 1)

A process for preparing an article, the process comprising at least the following process steps:
(a) providing a polyamide composition according to claim 1;
(b) preparing a substantially liquid melt of the polyamide composition; and
(c) conducting a liquid-assisted injection moulding process in order to obtain the article.

### Claim 14 (depends on 1)

An article comprising at least the polyamide composition according to claim 1.

### Claim 15 (depends on 13)

An article obtained by the process according to claim 13.