Adhesive composition and pneumatic tire using same

Patent metadata

Field	Value
Publication number	US-9643452-B2
Application number	US-201113259062-A
Country	US
Kind code	B2
Filing date	Mar 7, 2011
Priority date	May 31, 2010
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

Provided is an adhesive composition that provides excellent adhesion between a thermoplastic resin or a thermoplastic elastomer in which an elastomer component is dispersed in the thermoplastic resin and a tire by a combination of general-purpose materials, without using any special polymer. The adhesive composition comprises 100 parts by weight of a base polymer and 20 to 50 parts by weight of a resol-type phenolic resin-based resin crosslinking agent, wherein 100 parts by weight of the base polymer comprises 80 to 99 parts by weight of a thermoplastic elastomer and 1 to 20 parts by weight of a halogenated rubber. The resol-type phenolic resin-based resin crosslinking agent is preferably an alkylphenol-formaldehyde resin. Examples of the thermoplastic elastomer can include styrene-butadiene-styrene block copolymers, and examples of the halogenated rubber can include chloroprene rubber and chlorosulfonated polyethylene.

First claim

The invention claimed is:

1. An adhesive composition comprising 100 parts by weight of a base polymer and 20 to 50 parts by weight of a resol-type phenolic resin-based resin crosslinking agent, wherein 100 parts by weight of the base polymer comprises 80 to 99 parts by weight of a thermoplastic elastomer and 1 to 20 parts by weight of a halogenated rubber, wherein the resol-type phenolic resin-based resin crosslinking agent is an alkylphenol-formaldehyde resin or a modified product thereof.

2. The adhesive composition according to claim 1 , wherein the thermoplastic elastomer is at least one selected from the group consisting of styrene-butadiene-styrene block copolymers (SBS), styrene-isoprene-styrene block copolymers (SIS), styrene-butadiene-butylene-styrene block copolymers (SBBS) and styrene-ethylene-butylene-styrene block copolymers (SEBS).

3. The adhesive composition according to claim 1 , wherein the melt flow rate of the thermoplastic elastomer is 10 g/10 minutes or more, as measured at 200° C. under a load of 5 kg in accordance with JIS K 7210.

4. The adhesive composition according to claim 1 , wherein the halogenated rubber is at least one selected from the group consisting of chloroprene rubber, chlorosulfonated polyethylene, chlorinated polyethylene, chlorinated butyl rubber, brominated butyl rubber and brominated poly(isobutylene-co-p-methylstyrene).

5. The adhesive composition according to claim 1 , wherein 100 parts by weight of the base polymer comprises 5 to 10 parts by weight of the halogenated rubber.

6. The adhesive composition according to claim 1 , wherein the adhesive composition comprises 30 to 40 parts by weight of the resol-type phenolic resin-based resin crosslinking agent, based on 100 parts by weight of the base polymer.

7. The adhesive composition according to claim 1 , wherein the adhesive composition has, in an uncrosslinked state, a capillary shear melt viscosity of 2000 Pa·s or lower at a temperature of 150° C. and a shear rate of 243 s −1 and has a torque of 0.5 dN·m or lower after 20 minutes at 150° C. and a torque of 1.0 dN·m or higher after 20 minutes at 175° C. as measured by a rotorless rheometer.

8. A laminate comprising a layer made of the adhesive composition according to claim 1 and a layer made of a thermoplastic resin or a layer made of a thermoplastic elastomer composition having a continuous phase of a thermoplastic resin component and a dispersed phase of an elastomer component.

9. The laminate according to claim 8 , wherein the layer made of the adhesive composition has a thickness of 5 to 100 μm.

10. The adhesive composition according to claim 2 , wherein the melt flow rate of the thermoplastic elastomer is 10 g/10 minutes or more, as measured at 200° C. under a load of 5 kg in accordance with JIS K 7210.

11. The adhesive composition according to claim 2 , wherein the halogenated rubber is at least one selected from the group consisting of chloroprene rubber, chlorosulfonated polyethylene, chlorinated polyethylene, chlorinated butyl rubber, brominated butyl rubber and brominated poly(isobutylene-co-p-methylstyrene).

12. The adhesive composition according to claim 3 , wherein the halogenated rubber is at least one selected from the group consisting of chloroprene rubber, chlorosulfonated polyethylene, chlorinated polyethylene, chlorinated butyl rubber, brominated butyl rubber and brominated poly(isobutylene-co-p-methylstyrene).

13. The adhesive composition according to claim 2 , wherein 100 parts by weight of the base polymer comprises 5 to 10 parts by weight of the halogenated rubber.

14. The adhesive composition according to claim 3 , wherein 100 parts by weight of the base polymer comprises 5 to 10 parts by weight of the halogenated rubber.

15. The adhesive composition according to claim 4 , wherein 100 parts by weight of the base polymer comprises 5 to 10 parts by weight of the halogenated rubber.

16. The adhesive composition according to claim 2 , wherein the adhesive composition comprises 30 to 40 parts by weight of the resol-type phenolic resin-based resin crosslinking agent, based on 100 parts by weight of the base polymer.

17. The adhesive composition according to claim 3 , wherein the adhesive composition comprises 30 to 40 parts by weight of the resol-type phenolic resin-based resin crosslinking agent, based on 100 parts by weight of the base polymer.

18. The adhesive composition according to claim 4 , wherein the adhesive composition comprises 30 to 40 parts by weight of the resol-type phenolic resin-based resin crosslinking agent, based on 100 parts by weight of the base polymer.

19. The adhesive composition according to claim 5 , wherein the adhesive composition comprises 30 to 40 parts by weight of the resol-type phenolic resin-based resin crosslinking agent, based on 100 parts by weight of the base polymer.

Assignees

• Tomoi Shusaku
• Yokohama Rubber Co Ltd

Inventors

• Tomoi Shusaku

Classifications

• B60C1/0008

  Compositions of the inner liner · CPC title

• C09J161/06

  of aldehydes with phenols · CPC title

• B60C2005/145

  made of laminated layers · CPC title

• C08L61/06

  of aldehydes with phenols · CPC title

• Y10T428/265

  1 mil or less · CPC title