发明名称 |
Tire cure bladders containing polytetrafluoroethylene powder and use thereof |
摘要 |
Expandable bladders for use in curing presses for hydrocarbon rubbers, such as pneumatic tires, are a crosslinked elastomer composition comprising isobutylene repeat units and including a fluorinated ethylene polymer added in particulate form and thereafter dispersed throughout the bladder. These fluorinated ethylene polymer may or may not form fibers. The bladders may further comprise graphite. A preferred isobutylene elastomer is a brominated copolymer of from 80 to 99 weight percent isobutylene and from 1 to 20 weight percent paramethylstyrene. The bladders have enhanced lubricity, reduced adhesion to cured tire innerliners, better resistance to cracking during flexing, and have lower tension set than similar compositions without fluorinated ethylene polymers. The above enhancements allow hydrocarbon rubbers such as tires to be molded with fewer defects caused by abraded or deformed bladders. They also enhance the useful life of the bladder reducing the cost of tire curing.
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申请公布号 |
US5728311(A) |
申请公布日期 |
1998.03.17 |
申请号 |
US19960586569 |
申请日期 |
1996.01.16 |
申请人 |
THE GOODYEAR TIRE & RUBBER COMPANY |
发明人 |
PATITSAS, GEORGE PHILEMON;SANDSTROM, PAUL HARRY;APTICAR, SAMSON SAMUEL;KANSUPADA, BHARAT KANCHANLAL |
分类号 |
B29C33/02;B29C33/38;B29C33/50;B29C33/60;B29C33/62;B29C35/02;B29C35/04;B29D30/26;B29K21/00;B29K105/24;B29L30/00;C08L23/22;C08L23/28;C08L27/18;(IPC1-7):B29C35/00;C08F210/08 |
主分类号 |
B29C33/02 |
代理机构 |
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代理人 |
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