Self-sealing composition for pneumatic object
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08K-005/01
B29C-073/00
B60C-001/00
출원번호
US-0057134
(2009-07-23)
등록번호
US-8614276
(2013-12-24)
우선권정보
FR-08 55319 (2008-08-01)
국제출원번호
PCT/EP2009/005345
(2009-07-23)
§371/§102 date
20110502
(20110502)
국제공개번호
WO2010/012413
(2010-02-04)
발명자
/ 주소
Voge, Bozena
Vasseur, Didier
Merino Lopez, Jose
Pialot, Frederic
출원인 / 주소
Michelin Recherche et Technique S.A.
대리인 / 주소
Cozen O'Connor
인용정보
피인용 횟수 :
2인용 특허 :
6
초록▼
A self-sealing elastomer composition that can be used especially as a puncture-resistant layer in an inflatable article, comprising: as predominant elastomer, an unsaturated diene elastomer; a thermoplastic hydrocarbon plasticizer resin with a weight content of between 30 and 90 phr; a liquid plasti
A self-sealing elastomer composition that can be used especially as a puncture-resistant layer in an inflatable article, comprising: as predominant elastomer, an unsaturated diene elastomer; a thermoplastic hydrocarbon plasticizer resin with a weight content of between 30 and 90 phr; a liquid plasticizer, the Tg (glass transition temperature) of which is below −20° C., with a weight content between 0 and 60 phr; and 0 to less than 30 phr of a filler. Also disclosed is an article such as a tire provided with the puncture-resistant layer comprising the self-sealing elastomer composition. The puncture-resistant layer is advantageously combined with an airtight layer, for example based on butyl rubber, so as to form, in the inflatable article, a puncture-resistant airtight laminate.
대표청구항▼
1. A self-sealing elastomer composition that can be used especially as a puncture-resistant layer in an inflatable article, comprising: as predominant elastomer, an unsaturated diene elastomer;a hydrocarbon resin with a weight content of between 30 and 90 phr;a liquid plasticizer, the Tg (glass tran
1. A self-sealing elastomer composition that can be used especially as a puncture-resistant layer in an inflatable article, comprising: as predominant elastomer, an unsaturated diene elastomer;a hydrocarbon resin with a weight content of between 30 and 90 phr;a liquid plasticizer, the Tg (glass transition temperature) of which is below −20° C., with a weight content between 10 and 60 phr, wherein the liquid plasticizer has a number of average molecular weight of 300-90,000 and is selected from liquid elastomers, polyolefinic oils, naphthenic oils, paraffinic oils, DAE oils, MES oils, TDAE oils, mineral oils, vegetable oils, ether plasticizers, ester plasticizers, phosphate plasticizers, sulphonate plasticizers and mixtures thereof; and0 to less than 30 phr of a filler. 2. The composition according to claim 1, wherein the unsaturated diene elastomer is chosen from the group formed by polybutadienes, natural rubber, synthetic polyisoprenes, butadiene copolymers, isoprene copolymers and blends of these elastomers. 3. The composition according to claim 2, wherein the unsaturated diene elastomer is an isoprene elastomer chosen from the group fanned by natural rubber, synthetic polyisoprenes and blends of these elastomers. 4. The composition according to claim 1, wherein the unsaturated diene elastomer content is greater than 50 phr. 5. The composition according to claim 1, wherein the isoprene elastomer is the sole elastomer of the composition. 6. The composition according to claim 1, wherein the number-average molecular weight of the diene elastomer is between 100 000 and 5 000 000 g/mol. 7. The composition according to claim 1, wherein the hydrocarbon resin content is in the 45 to 75 phr range. 8. The composition according to claim 1, wherein the hydrocarbon resin has a Tg (glass transition temperature) above 0° C. 9. The composition according to claim 8, wherein the hydrocarbon resin has a Tg of between +25 and +100° C. 10. The composition according to claim 1, wherein the number-average molecular weight of the hydrocarbon resin is between 400 and 2000 g/mol. 11. The composition according to claim 1, wherein the hydrocarbon resin is chosen from the group formed by cyclopentadiene (CPD) homopolymer or copolymer resins, dicyclopentadiene (DCPD) homopolymer or copolymer resins, terpene homopolymer or copolymer resins, C5-cut homopolymer or copolymer resins, C9-cut homopolymer or copolymer resins and blends of these resins. 12. The composition according to claim 1, wherein the liquid plasticizer content is in the 10 to 40 phr range. 13. The composition according to claim 12, wherein the liquid plasticizer content is in the 10 to 30 phr range. 14. The composition according to claim 1, wherein the liquid plasticizer is chosen from liquid elastomers, polyolefinic oils, vegetable oils and mixtures of these compounds. 15. The composition according to claim 1, comprising 0 to less than 20 phr of filler. 16. The composition according to claim 1, comprising carbon black as reinforcing filler. 17. The composition according to claim 16, comprising less than 5 phr of carbon black. 18. The composition according to claim 17, comprising between 0.5 and 2 phr of carbon black. 19. The composition according to claim 1, further comprising a vulcanization system. 20. The composition according to claim 19, wherein the vulcanization system is based on sulphur and a guanidine derivative. 21. The composition according to claim 20, wherein the guanidine derivative is diphenylguanidine. 22. The composition according to claim 20, wherein the vulcanization system comprises between 0.1 and 1.5 phr of sulphur and between 0 and 1.5 phr of guanidine derivative. 23. The composition according to claim 22, wherein the vulcanization system comprises between 0.2 and 1.2 phr of sulphur and between 0 and 1.0 phr of guanidine derivative. 24. An inflatable article provided with a puncture-resistant layer, said layer comprising, as self-sealing composition, the elastomer composition according to claim 1. 25. The article according to claim 24, wherein the self-sealing composition is in the form of a puncture-resistant layer having a thickness of greater than 0.3 mm. 26. The article according to claim 25, wherein the puncture-resistant layer has a thickness of between 0.5 mm and 10 mm. 27. The article according to claim 24, wherein the puncture-resistant layer is deposited on the internal wall of the inflatable article. 28. The article according to claim 24 which is a rubber article. 29. The article according to claim 28, which is a tire. 30. The article according to claim 24, wherein the puncture-resistant layer is combined with an airtight layer thus constituting an airtight self-sealing laminate. 31. The article according to claim 30, wherein the airtight layer is based on butyl rubber.
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이 특허에 인용된 특허 (6)
Hashimoto Takatsugu,JPX, High aromatic oil and rubber composition and oil extended synthetic rubber using the same.
Halasa Adel F. (Bath OH) Hsu Wen-Liang (Cuyahoga Falls OH) Zanzig David J. (Uniontown OH) Allen Gerald L. (Mogadore OH) Austin Laurie E. (Hartville OH), Tire tread containing 3.4-polyisoprene rubber.
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