# US 5,352,721 A · Thermoplastic resin composition

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,352,721 A
- Document ID: US5352721A
- Status: Granted
- Kind: A
- Application number: 08/105,621
- Filed: 1993-08-13
- Granted: 1994-10-04
- Earliest claimed: 1992-08-14
- Assignees: Mitsubishi Petrochemical Co., Ltd.
- Inventors: Kenjiro Takayanagi; Koji Nishida; Kiyonori Suzuki
- Web page: https://patentgrep.com/patent/US5352721A

## CPC

- C08K 5/15: Heterocyclic compounds having oxygen in the ring
- C08K 5/06: Ethers; Acetals; Ketals; Ortho-esters
- C08L 71/123: {not modified by chemical after-treatment}
- C08L 77/02: Polyamides derived from omega-amino carboxylic acids or from lactams thereof (C08L77/10 takes precedence)
- C08L 59/00: Compositions of polyacetals; Compositions of derivatives of polyacetals (of polyvinyl acetals C08L29/14)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

There is disclosed a thermoplastic resin composition which comprises (a) a polyphenylene ether and (b) a polyamide resin, and (c) 0.01 to 5 parts by weight of an acetal and (d) 0.01 to 5 parts by weight of a Lewis acid based on 100 parts by weight of the above (a) and (b) in total.

## Claims

### Claim 1

A thermoplastic resin composition which comprises
(a) a polyphenylene ether and
(b) a polyamide resin, and
(c) 0.01 to 5 parts by weight of an acetal and
(d) 0.01 to 5 parts by weight of a Lewis acid based on 100 parts by weight of the sum of (a) and (b) in total.

### Claim 2 (depends on 1)

The composition according to claim 1, wherein said composition comprises
(a) the polyphenylene ether and
(b) the polyamide resin, and
(c) 0.1 to 3 parts by weight of the acetal and
(d) 0.1 to 3 parts by weight of the Lewis acid based on 100 parts by weight of the sum of (a) and (b) in total.

### Claim 3 (depends on 1)

The composition according to claim 1, wherein said composition comprises
(a) the polyphenylene ether and
(b) the polyamide resin, and
(c) 0.2 to 1.5 parts by weight of the acetal and
(d) 0.2 to 1.5 parts by weight of the Lewis acid based on 100 parts by weight of the sum of (a) and (b) in total.

### Claim 4 (depends on 1)

The composition according to claim 1, wherein said (a) and (b) are contained in the composition in amounts of
(a) 2 to 98% by weight of the polyphenylene ether and
(b) 98 to 2% by weight of the polyamide resin based on 100% by weight of the sum of (a) and (b).

### Claim 5 (depends on 1)

The composition according to claim 1, wherein said (a) and (b) are contained in the composition in amounts of
(a) 15 to 75% by weight of the polyphenylene ether and
(b) 85 to 25% by weight of the polyamide resin based on 100% by weight of the sum of (a) and (b).

### Claim 6 (depends on 1)

The composition according to claim 1, wherein said (a) and (b) are contained in the composition in amounts of
(a) 25 to 60% by weight of the polyphenylene ether and
(b) 75 to 40% by weight of the polyamide resin based on 100% by weight of the sum of (a) and (b).

### Claim 7 (depends on 1)

The composition according to claim 1, wherein said acetal (c) is an oxymethylene homopolymer.

### Claim 8 (depends on 1)

The composition according to claim 1, wherein said acetal (c) is trioxane.

### Claim 9 (depends on 1)

The composition according to claim 1, wherein said Lewis acid (d) is a boron compound.

### Claim 10 (depends on 1)

The composition according to claim 1, wherein said composition comprises:
(a) 15 to 75% by weight of the polyphenylene ether selected from the group consisting of a homopolymer of 2,6-dimethylphenol, a copolymer of 2,6-dimethylphenol and 2,3,6-trimethylphenol, a copolymer of 2,6-dimethylphenol and 2,3,5,6-tetramethylphenol, and a copolymer of 2,6-diethylphenol and 2,3,6-trimethylphenol,
(b) 85 to 25% by weight of the polyamide resin selected from the group consisting of 6,6-nylon, 6-nylon and a noncrystalline polyamide resin, and
(c) 0.1 to 3 parts by weight of an acetal selected from the group consisting of 1,3-dioxolan, trioxane, tetraoxane, a polymer of formaldehyde, a polymer of acetaldehyde, 1,3,5-trioxacycloheptane, 1,3-dioxepane, 4H, 7H-1,3-dioxepine, 1,3,6-trioxacyclooctane, 1,3,6,9-tetraoxacyclodecane, 1,3,6,9-tetraoxacycloundecane, 1,3,6,9,12-pentaoxacyclotetradecane, 1,3,6,9,12,15-hexaoxacycloheptadecane and 2,7-dioxabicyclo[2.2.1 ]heptane and
(d) 0.1 to 3 parts by weight of a boron compound selected from the group consisting of trialkyl boran, trialkyl borate, boric acid and halogenated boron
(c) and (d) being based on 100 parts by weight of the sum of (a) and (b).

### Claim 11 (depends on 1)

The composition according to claim 1, which further comprises 1 to 30 parts by weight of an impact resistance improver based on 100 parts by weight of the components (a) and (b) in total.

### Claim 12 (depends on 1)

The composition according to claim 1, wherein said acetal is at least one selected from the group consisting of an oxymethylene copolymer, an oxymethylene homopolymer, paraformaldehyde, trioxane and tetraoxane.

### Claim 13 (depends on 12)

The composition according to claim 12, wherein said acetal is an oxymethylene copolymer.

### Claim 14 (depends on 9)

The composition according to claim 9, wherein said Lewis acid is boric acid.