# US 10,119,024 B2 · Resin composition and molded article thereof

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

- Number: US 10,119,024 B2
- Document ID: US10119024B2
- Status: Granted
- Kind: B2
- Application number: 15/673,953
- Filed: 2017-08-10
- Published: 2017-11-23
- Granted: 2018-11-06
- Earliest claimed: 2015-04-14
- Assignees: Toray Industries, Inc.
- Applicants: Toray Industries, Inc.
- Inventors: Keiichiro Nomura; Nobuhiro Morioka; Sadayuki Kobayashi
- Web page: https://patentgrep.com/patent/US10119024B2

## CPC

- C08L 77/02: Polyamides derived from omega-amino carboxylic acids or from lactams thereof (C08L77/10 takes precedence)
- C08G 81/00: Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers (involving only carbon-to-carbon unsaturated bond reactions C08F299/00 {; polyester-amides C08G69/44; polyester-imides C08G73/16; polyamides-imides C08G73/14; block- or graft polymers containing polysiloxane sequences C08G77/42})
- C08L 71/02: Polyalkylene oxides
- C08G 83/007: {Polyrotaxanes; Polycatenanes}
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

Disclosed is a resin composition including at least a polyamide (A) and a polyrotaxane (B) whose cyclic molecule is modified with a graft chain, which are mixed together, wherein 80 parts by weight or more and 99.9 parts by weight or less of the polyamide (A) and 0.1 part by weight or more and 20 parts by weight or less of the polyrotaxane (B) are mixed together relative to 100 parts by weight of the total amount of the polyamide (A) and the polyrotaxane (B). To provide a resin composition capable of affording a molded article having excellent balance between rigidity and toughness.

## Claims

### Claim 1

A resin composition comprising a mixture of: (A) a polyamide and (B) a polyrotaxane, wherein the cyclic molecule of the polyrotaxane is modified with a graft chain, and wherein
80 parts by weight or more and 99.9 parts by weight or less of the polyamide (A) and 0.1 part by weight or more and 20 parts by weight or less of the polyrotaxane (B) are mixed together relative to 100 parts by weight of the total amount of the polyamide (A) and the polyrotaxane (B), and
the resin composition has an islands-in-sea structure composed of a sea phase including the polyamide (A) as a main component and an island phase including the polyrotaxane (B) as a main component, as well as a lakes-in-islands-in-sea structure with a lake phase including the polyamide (A) and/or a reaction product of the polyamide (A) and the polyrotaxane (B) as main component(s), the lake phase being disposed in the island phase.

### Claim 2 (depends on 1)

The resin composition according to claim 1, wherein the graft chain is a graft chain having at least one functional group selected from the group consisting of a carboxyl group, an isocyanate group, a glycidyl group, and an amino group at the end of the graft chain.

### Claim 3 (depends on 2)

The resin composition according to claim 2, wherein a concentration of functional group at the end of the graft chain of the polyrotaxane (B) is 2×10−5 mol/g or more and 5×10−4 mol/g or less.

### Claim 4 (depends on 1)

The resin composition according to claim 1, which contains 3 parts by weight or more and 25 parts by weight or less of a reaction product of the polyamide (A) and the polyrotaxane (B) relative to 100 parts by weight of the total amount of the polyamide (A) and the polyrotaxane (B).

### Claim 5 (depends on 1)

The resin composition according to claim 1, wherein the island phase has an average diameter of 10 μm or less.

### Claim 6 (depends on 1)

A molded article comprising the resin composition according to claim 1.