Low bromine isobutylene-co-4-bromomethylstyrene compositions for severe duty elastomer applications
US5698640A · kind A · utility
17Cited by
5References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1996 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Aug 1, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2975
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Tire curing bladders are made from poly(isobutylene-co-4-bromomethylstyrene) with a benzylic bromine content of from 0.15 to 0.45 mole percent, vulcanized with a cure system of 1,6-hexamethylene-bis(sodium thiosulfate) and zinc oxide. The vulcanizate has low residual benzylic bromine content which leads to enhanced stability under severe duty applications, reduced hot tension set, and reduced adhesion or co-cure to halobutyl tire innerliners.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.