Thermoplastic elastomer composition and composite molded product

• US 5,910,540 A
• Filed: 10/22/1996
• Issued: 06/08/1999
• Est. Priority Date: 11/06/1995
• Status: Expired due to Term

• Current Assignee: Mitsubishi Chemical Corporation (Mitsubishi Chemical Group Corp.)
• Original Assignee: Mitsubishi Chemical Corporation (Mitsubishi Chemical Group Corp.)
• Inventors: Takahashi, Hideki
• Primary Examiner(s): Short, Patricia A.
• Application Number:
  US08/734,600
• Time in Patent Office: 959 Days
• Field of Search: 525/92 F, 525/92 B, 525/92 C
• US Class Current: 525/92.00B
• CPC Class Codes: C08L 2666/14 Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
• CPC Class Codes: C08L 53/00 Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 53/025 modified
• CPC Class Codes: C08L 67/025 containing polyether sequences
• CPC Class Codes: C08L 77/00 Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 77/06 Polyamides derived from polyamines and polycarboxylic acids C08L77/10 takes precedence

Abstract

The present invention relates to a thermoplastic elastomer composition comprising the following components (A) and (B), and to a composite molded product comprising a resin layer and an elastomer layer containing said composition as the base material. Component (A): 5 to 95% by weight of a styrene type block copolymer or a hydrogenated product thereof, comprising block (a) which is made of a polymer of styrene or a derivative thereof, and block (b) which is made of an isoprene homopolymer or a copolymer of isoprene and butadiene, wherein the total amount of the 1,2-bond and the 3,4-bond in the isoprene polymer part in block (b) is not less than 40% of the total isoprene bond unit. Component (B): 95 to 5% by weight of one or more thermoplastic elastomers which are selected from the group consisting of polyester type thermoplastic elastomers, polyamide type thermoplastic elastomers, and polyurethane type thermoplastic elastomers. The composition of the present invention exhibits excellent heat fusion properties to both an olefin type resin and a nonolefin type resin, and gives a composite molded product having a high peeling strength, comprising said resin and said elastomer.

Claims

1. A thermoplastic elastomer composition, comprising the following components (A) and (B);

component (A) 5 to 95% by weight of a hydrogenated product of a block copolymer comprising block (a) which is made of a polymer of styrene or a derivative thereof, and block (b) which is made of an isoprene homopolymer or a copolymer of isoprene and butadiene, wherein the total amount of the 1,2-bonds and the 3,4-bonds in the isoprene polymer part in block (b) is not less than 40% of the total isoprene bond units;

component (B);

95 to 5% by weight of one or more thermoplastic elastomers which are selected from the group consisting thermoplastic polyester elastomers thermoplastic polyamide elastomers, and thermoplastic polyurethane elastomers, wherein said component (B) has a JIS Shore hardness (A Scale) of not more than 96 according to JIS-K6301, wherein said hydrogenated product has a hydrogenation degree of not less than 95% by weight.

2. A thermoplastic elastomer composition according to claim 1, wherein the total amount of the 1,2-bonds and the 3,4-bonds in the isoprene polymer part in said block (b) is not less than 45% of the total isoprene bonds units.

3. A thermoplastic elastomer composition according to claim 1, wherein the ratio of said block (a) in said component (A) is 10 to 45% by weight, and the ratio of said block (b) in said component (A) is 90 to 55% by weight.

4. A thermoplastic elastomer composition according to claim 1, wherein said component (B) is a thermoplastic polyester elastomer which has a bending modulus (according to JIS K-7203) of not more than 10,000, and a melting point by DSC (peak temperature) of not more than 230°

C.

5. A thermoplastic elastomer composition according to claim 1, wherein said component (B) is a thermoplastic polyester elastomer which is an elastomer obtained by polycondensation of an aliphatic and/or alicyclic diol having 2 to 12 carbon atoms, an aromatic dicarboxylic acid or an alkyl ester thereof, and a polyalkylene ether glycol.

6. A thermoplastic elastomer composition according to claim 1, wherein said component (B) is a thermoplastic polyurethane elastomer which is an elastomer made of a hard segment block comprising a diisocyanate and a short-chain glycol, and a soft segment block comprising a diisocyanate and a long-chain polyol.

7. A thermoplastic elastomer composition according to claim 1, which contains said component (A) in an amount of 20 to 80% by weight and said component (B) in an amount of 80 to 20% by weight.

8. A thermoplastic elastomer composition according to claim 1, wherein said component (B) is a thermoplastic polyamide elastomer which is an elastomer made of a hard segment block comprising a polyamide and a soft segment block comprising a polyether or polyester.

9. A thermoplastic elastomer composition comprising the following components (A) and (B):

component (A);

5 to 95% by weight of a block copolymer or a hydrogenated product thereof, comprising block (a) which is made of a polymer of styrene or a derivative thereof, and block (b) which is made of an isoprene homopolymer or a copolymer of isoprene and butadiene, wherein the total amount of the 1,2-bonds and the 3,4-bonds in the isoprene polymer part in block (b) is not less than 40% of the total isoprene bond units;

component (B);

95 to 5% by weight of one or more thermoplastic elastomers which are selected from the group consisting of thermoplastic polyester elastomers, thermoplastic polyamide elastomers, and thermoplastic polyurethane elastomers, wherein said composition has a%ending modulus according to JIS-K7203 of 0 to 1,000 kg/cm².

10. A thermoplastic elastomer composition comprising the following components (A) and (B);

component (A);

5 to 95% by weight of a block copolymer or a hydrogenated product thereof, comprising block (a) which is made of a polymer of styrene or a derivative thereof, and block (b) which is made of an isoprene homopolymer or a copolymer of isoprene and butadiene, wherein the total amount of the 1,2-bonds and the 3,4-bonds in the isoprene polymer part in block (b) is not less than 40% of the total isoprene bond units;

component (B);

95 to 5% by weight of one or more thermoplastic elastomers which are selected from the group consisting of thermoplastic polyester elastomers, thermoplastic polyamide elastomers, and thermoplastic polyurethane elastomers, wherein said component (B) has a JIS Shore hardness (A Scale) of not more than 96 according to JIS-K6301 wherein said thermoplastic elastomer composition has a bending modulus according to JIS-K7203 of 0 to 1,000 kg/cm².

11. A thermoplastic elastomer composition according to claim 10 wherein said component (B) is a thermoplastic polyester elastomer which is an elastomer obtained by polycondensation of an aliphatic and/or alicyclic diol having 2 to 12 carbon atoms, an aromatic dicarboxylic acid or an alkyl ester thereof, and a polyalkylene ether glycol.