Patent US4624620A successfully refreshed from Google Patents.
US3676529A
Expired / Lapsed
US
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Curable graft polymers of polyalkylene oxides
Assignee: Goodyear Tire and Rubber Co
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Filing: 1970-07-24
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Granted: 1972-07-11
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Expires: 1990-07-24
Abstract
Abstract Substituted olefin monomers, such as diene and vinyl monomers, may be grafted to solid poly-1,2-alkylene oxide by employing a tertiary-butyl-perester catalyst at between 40* C. and 100* C. Diene and vinyl monomers may be grafter individually or as mixtures depending on the graft polymer properties desired. The inclusion of dienes yields a sulfur-curable gum stock whose vulcanizates have excellent physical properties for use as a general purpose rubber.
Inventors
- 👤 Harry H Fall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:24
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/06; Y; Y10; Y10S; Y10S525/00; Y10S525/942
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
18 words
The process according to claim 1 wherein the grafting monomer is butadiene or isoprene or a mixture thereof.
Claim 2
Dependent Claim
20 words
The process according to claim 1 wherein the grafting monomer is butadiene or isoprene or a mixture thereof and acrylonitrile.
Claim 3
Dependent Claim
61 words
The process according to claim 1 wherein the tertiary butyl perester catalyst is employed in amounts between 0.5 and 20.0 parts by weight of the polyalkylene oxide, the polymerization is conducted in an aromatic hydrocarbon solvent at a temperature between 40* C. and 80* C., and the grafting monomer-charge is between 3 and 200 parts by weight of the polyalkylene oxide.
Claim 4
Dependent Claim
19 words
The process according to claim 4 wherein the grafting monomer is butadiene or isoprene or mixtures thereof and acrylonitrile.
Claim 5
Dependent Claim
78 words
A graft polymer comprising a backbone of poly-1,2-alkylene oxide containing from three to 12 carbon atoms and a grafted side chain which is a member of the group consisting of butadiene, isoprene, piperylene, styrene, vinyl isobutyl ether, vinyl acetate, or mixtures thereof, wherein the grafted side chain is present in amounts between 3 and 50 parts by weight of the polymer backbone and the graft polymer has a Mooney Viscosity (ML-4/212) of from about 20 to about 100.
Claim 6
Dependent Claim
16 words
The graft polymer according to claim 6 wherein the grafted side chain is polybutadiene or polyisoprene.
Claim 7
Dependent Claim
81 words
A graft polymer comprising a backbone of poly-1,2-alkylene oxide containing from three to 12 carbon atoms and a grafted side chain which consists of a major portion in parts by weight of polybutadiene or polyisoprene and a minor portion in parts by weight of polyacrylonitrile, wherein the grafted side chain is present in amounts between 3 and 50 parts by weight of the polymer backbone and the graft polymer has a Mooney Viscosity (ML-4/212) of from about 20 to about 100.
Claim 8
Dependent Claim
14 words
The graft polymer according to claim 8 wherein the 1,2-alkylene oxide is polypropylene oxide.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |