Thermoplastic polymer composition and molded article

Patent metadata

Field	Value
Publication number	US-9102849-B2
Application number	US-201113808688-A
Country	US
Kind code	B2
Filing date	Jul 5, 2011
Priority date	Jul 9, 2010
Publication date	Aug 11, 2015
Grant date	Aug 11, 2015

Abstract

A thermoplastic polymer composition which is excellent in flexibility, mechanical properties, and moldability and is capable of adhering to ceramics, metals, and synthetic resins even by heat treatment at a low temperature (for example, 190° C. or lower) without the treatment with a primer, and a molded product obtained by using the thermoplastic polymer composition. The thermoplastic polymer composition includes 100 parts by mass of a thermoplastic elastomer (A), 1 to 100 parts by mass of a polyvinyl acetal resin (B), 5 to 100 parts by mass of a polar group-containing olefin-based copolymer (C), and 0.1 to 300 parts by mass of a softener (D). The thermoplastic elastomer (A) is a block copolymer which has a polymer block constituted by aromatic vinyl compound units and a polymer block constituted by conjugated diene units or a hydrogenated product of the block copolymer.

First claim

What is claimed is:

1. A thermoplastic polymer composition, comprising:
(A) 100 parts by mass of a thermoplastic elastomer (A);
(B) 1 to 100 parts by mass of a polyvinyl acetal resin (B);
(C) 5 to 100 parts by mass of a polar group-containing olefin-based copolymer (C); and
(D) 0.1 to 300 parts by mass of a softener (D),
wherein the thermoplastic elastomer (A) is a block copolymer comprising a polymer block comprising aromatic vinyl compound units and a polymer block comprising conjugated diene units, or a hydrogenated product of the block copolymer comprising a polymer block comprising aromatic vinyl compound units and a polymer block comprising conjugated diene units, and
wherein the polar group-containing olefin-based copolymer (C) is an olefin-(meth)acrylate random copolymer.

2. The thermoplastic polymer composition according to claim 1 , comprising:
100 parts by mass of the thermoplastic elastomer (A);
10 to 70 parts by mass of the polyvinyl acetal resin (B);
10 to 70 parts by mass of the polar group-containing olefin-based copolymer (C); and
1 to 200 parts by mass of the softener (D).

3. The thermoplastic polymer composition according to claim 1 , wherein the polyvinyl acetal resin (B) is obtained by acetalizing a polyvinyl alcohol having an average degree of polymerization of 100 to 4,000 to a degree of acetalization of 55 to 88% by mole.

4. The thermoplastic polymer composition according to claim 1 , wherein the polyvinyl acetal resin (B) is a polyvinyl butyral.

5. The thermoplastic polymer composition according to claim 1 , wherein a melt flow rate (MFR) of the polar group-containing olefin-based copolymer (C) is 0.1 to 100 g/10 min when measured at 190° C. under a load of 2.16 kg (21.18 N).

6. The thermoplastic polymer composition according to claim 1 , wherein a Vicat softening point of the polar group-containing olefin-based copolymer (C) is 40 to 100° C.

7. The thermoplastic polymer composition according to claim 1 , wherein the polar group-containing olefin-based copolymer (C) is an ethylene-methyl acrylate random copolymer.

8. A molded product, comprising the thermoplastic polymer composition according to claim 1 .

9. The molded product according to claim 8 , wherein the thermoplastic polymer composition is adhered to at least one material selected from the group consisting of ceramics, metals, and synthetic resins.

10. The molded product according to claim 9 , wherein the thermoplastic polymer composition is adhered to at least one material selected from the group consisting of ceramics and metals.

11. The molded product according to claim 8 , wherein ceramics, metals, synthetic resins, or at least two materials selected from the group consisting of ceramics, metals, and synthetic resins, are adhered to each other by the thermoplastic polymer composition.

12. The thermoplastic polymer composition according to claim 2 , wherein the polyvinyl acetal resin (B) is obtained by acetalizing a polyvinyl alcohol having an average degree of polymerization of 100 to 4,000 to a degree of acetalization of 55 to 88% by mole.

13. The thermoplastic polymer composition according to claim 2 , wherein the polyvinyl acetal resin (B) is a polyvinyl butyral.

14. The thermoplastic polymer composition according to claim 1 , wherein the thermoplastic elastomer (A) is the block copolymer comprising a polymer block comprising aromatic vinyl compound units and a polymer block comprising conjugated diene units.

15. The thermoplastic polymer composition according to claim 1 , wherein the thermoplastic elastomer (A) is the hydrogenated product of the block copolymer comprising a polymer block comprising aromatic vinyl compound units and a polymer block comprising conjugated diene units.

16. The thermoplastic polymer composition according to claim 15 , wherein the degree of hydrogenation of the polymer block comprising conjugated diene units is 80% or more.

Assignees

• Minamide Asako
• Masuda Mikio
• Kuraray Co

Inventors

• Minamide Asako
• Masuda Mikio

Classifications

• C09J123/02 Primary

  not modified by chemical after-treatment · CPC title

• Y10T428/31696

  Including polyene monomers [e.g., butadiene, etc.] · CPC title

• C08L53/02 Primary

  of vinyl-aromatic monomers and conjugated dienes · CPC title

• C08L23/0869

  with unsaturated acids, e.g. [meth]acrylic acid; with unsaturated esters, e.g. [meth]acrylic acid esters · CPC title

• C08L29/14

  Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols · CPC title