US4022848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bladder composition containing low unsaturation butyl rubber
Assignee: Goodyear Tire and Rubber Co
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Filing: 1974-08-05
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Granted: 1977-05-10
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Expires: 1994-08-05
Abstract
Abstract Butyl rubber possessing a low unsaturation content is compounded with a bromomethyl alkylated phenolic resin and a metal compound such as stannous chloride and the composition used to prepare bladders for the vulcanization of pneumatic vehicle tires.
Inventors
- 👤 Lewis T. Lukich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:09
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/16; B; B29; B29D; B29D99/00; B29D99/005; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22; B29L; B29L2031/00; B29L2031/755
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
A product selected from the group consisting of tire curing bladders, air bags and curing tubes, said product being prepared from an essentially zinc oxide-free polymeric composition comprising A. 100 parts by weight of low unsaturation butyl rubber containing 0.5 to 1.1 mole percent of isoprene and correspondingly 98.9 to 99.5 mole percent of isobutylene, B. 1.0 to 10.0 parts by weight of bromomethyl alkylated phenolic resin prepared by brominating a resitol of a 2,6-dihydroxymethyl 4-alkyl phenol, wherein the said alkyl group containing 4 to 20 carbon atoms and the average bromine content of the brominated resitol being from about 1 to about 9 percent, and C. 0.25 to 2.0 parts by weight of a metal halide selected from the group consisting of zinc halides and stannous halides.
Claim 2
Dependent Claim
128 words
A product selected from the group consisting of tire curing bladders, air bags and curing tubes, said product being prepared from an essentially zinc oxide-free polymeric composition comprising A. 100 parts by weight of low unsaturation butyl rubber containing 0.5 to 1.1 mole percent of isoprene and correspondingly 98.9 to 99.5 mole percent of isobutylene, B. 1.0 to 10.0 parts by weight of bromomethyl alkylated phenolic resin prepared by brominating a resitol of a 2,6-dihydroxymethyl 4-alkyl phenol, wherein the said alkyl group containing 4 to 20 carbon atoms and the average bromine content of the brominated resitol being from about 1 to about 9 percent, and C. 0.25 to 2.0 parts by weight of a metal halide selected from the group consisting of zinc halides and stannous halides.
Claim 3
Dependent Claim
18 words
The product according to claim 1 wherein the level of the resin is from 4.0 to 7.0 parts.
Claim 4
Dependent Claim
23 words
The product according to claim 1 wherein the metal halide is selected from the group consisting of zinc chloride and hydrated stannous chloride.
Claim 5
Dependent Claim
26 words
The product according to claim 2 wherein the metal halide is hydrated stannous chloride and the level of metal halide is from 0.7 to 1.4 parts.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |