Adhesive composition for bonding rubber to metal

Patent metadata

Field	Value
Publication number	US-10975271-B2
Application number	US-201716089425-A
Country	US
Kind code	B2
Filing date	Apr 3, 2017
Priority date	Apr 4, 2016
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

An adhesive composition is comprised of a film forming polymer, (ii) a lower crystallinity polynitroso compound, (e.g., poly-(1,4-phenylyenazine-N,N-dioxide)), (iii) a higher crystallinity polynitroso compound (e.g., poly-(1,4-phenylyenazine-N,N-dioxide)), and (iv) a carrier liquid. The composition is useful in bonding metal and rubber to make, for example, components to damp noise, vibration or harshness.

First claim

What is claimed is:

1. An adhesive composition comprising, (i) a film forming polymer, (ii) a lower crystallinity polynitroso compound having a crystallinity of less than 30% by weight as determined by X-ray diffraction and, (iii) a higher crystallinity polynitroso compound having a crystallinity of at least 35% by weight as determined by X-ray diffraction, and (iv) a carrier liquid.

2. The composition of claim 1 , wherein the film forming polymer is a halogenated olefin polymer.

3. The composition of claim 1 , wherein the film forming polymer is a halogenated substituted polydiene polymer.

4. The composition of claim 1 , wherein (ii) and (iii) components of the composition are provided in a lower crystallinity/higher crystallinity weight ratio of 1/2 to 2/1.

5. The composition of claim 4 , wherein the lower crystallinity/higher crystallinity weight ratio is 1.1/1 to 1/1.1.

6. The composition of claim 1 , wherein the lower crystallinity polynitroso compound is a lower crystallinity poly-(1,4-phenylyenazine-N,N-dioxide).

7. The composition of claim 1 , wherein the higher crystallinity polynitroso compound is a higher crystallinity poly-(1,4-phenylyenazine-N,N-dioxide).

8. The composition of claim 1 , wherein the liquid carrier is comprised of water.

9. The composition of claim 8 , wherein the adhesive composition is further comprised of a surfactant.

10. The composition of claim 9 , wherein the surfactant is comprised of at least one of an anionic surfactant, cationic surfactant, nonionic surfactant and amphoteric surfactant.

11. The composition of claim 10 , wherein the surfactant is selected from the group consisting of the anionic surfactant, nonionic surfactant and combinations thereof.

12. The composition of claim 1 , wherein component (ii) has a crystallinity of less than 30% by weight as determined by X-ray diffraction and component (iii) has crystallinity of greater than 40% by weight as determined by X-ray diffraction.

13. The composition of claim 12 , wherein the lower and higher crystallinity polynitroso compounds are poly-(1,4-phenylyenazine-N,N-dioxide).

14. A method of bonding a substrate to rubber comprising,
(i) applying a coating of the adhesive composition of claim 1 to a substrate, unvulcanized rubber or both,
(ii) removing the carrier liquid to form an adhesive coating on the substrate, unvulcanized rubber or both,
(iii) interposing the adhesive coating between the substrate and unvulcanized rubber forming an assemblage, and
(iv) heating the assemblage to a vulcanization temperature and for a time sufficient to vulcanize the unvulcanized rubber and the adhesive coating thereby bonding the rubber to the substrate.

15. The method of claim 14 , wherein the substrate is a metal.

16. The method of claim 14 , wherein the rubber is a natural rubber, synthetic rubber or combinations thereof.

17. The method of claim 16 , wherein the rubber is natural rubber.

18. The method of claim 16 , wherein the rubber is a synthetic rubber selected from the group consisting of polybutadiene, neoprene, butyl rubber, polyisoprene, nitrile rubbers, styrene butadiene rubbers, or ethylene propylene diene based rubbers.

19. A composite article comprising the assemblage after heating of claim 14 .

20. The article of claim 19 , wherein the substrate is a metal and the article is an article for damping noise, vibration or harshness.

21. The article of claim 20 , wherein the article is an automotive component.

Assignees

• Dow Global Technologies Llc
• Ddp Specialty Electronic Materials Us Llc

Inventors

• Dehnicke Stefan
• Osichow Anna
• Krtsch Bernhard
• Zutavern Philipp
• List Ernst

Classifications

• C09J123/28

  by reaction with halogens or compounds containing halogen (C09J123/32 takes precedence) · CPC title

• C09J111/00 Primary

  Adhesives based on homopolymers or copolymers of chloroprene · CPC title

• C09J11/06 Primary

  organic · CPC title

• C09J5/06

  involving heating of the applied adhesive · CPC title

• C08K5/32

  Compounds containing nitrogen bound to oxygen · CPC title