Patent US4180490A successfully refreshed from Google Patents.
US4180490A
Expired / Lapsed
US
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Antiblock system and process aid for vulcanized vinyl acetate ethylene copolymers
Assignee: Millennium Petrochemicals Inc
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Filing: 1978-08-07
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Granted: 1979-12-25
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Expires: 1998-08-07
Abstract
Abstract Vulcanized vinyl acetate-ethylene elastomeric copolymers are substantially free of bloom and demonstrate improved anti-block and processing release characteristics upon the addition thereto of an effective amount of a mixture of stearic acid, paraffin wax and low molecular weight polyethylene.
Inventors
- 👤 Robert D. Maclean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:27
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08K; C08K5/00; C08K5/04; C08K5/09; C08L31/00; C08L31/02; C08L31/04; C08L23/06; C08L91/00; C08L91/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
50 words
A vinylacetate-ethylene elastomeric copolymer vulcanizate containing an anti-blocking and processing release effective amount of an anti-blocking, processing release system comprising stearic acid, paraffin wax and a polyethylene having an average molecular weight of from about 1500 to about 4000, said processing release system being substantially uniformly distributed in said vulcanizate.
Claim 2
Dependent Claim
50 words
A vinylacetate-ethylene elastomeric copolymer vulcanizate containing an anti-blocking and processing release effective amount of an anti-blocking, processing release system comprising stearic acid, paraffin wax and a polyethylene having an average molecular weight of from about 1500 to about 4000, said processing release system being substantially uniformly distributed in said vulcanizate.
Claim 3
Dependent Claim
20 words
The vinyl acetate-ethylene elastomeric copolymer vulcanizate of claim 1 containing from about 40 to about 60% vinyl acetate by weight.
Claim 4
Dependent Claim
40 words
The vinyl acetate-ethylene elastomeric copolymer vulcanizate of claim 1 containing from about 0.5 to about 1.5 phr stearic acid, about 1.0 to about 3.0 phr paraffin wax and about 1.0 to about 3.0 phr polyethylene by weight of said vulcanizate.
Claim 5
Dependent Claim
29 words
The vinyl acetate-ethylene elastomeric copolymer vulcanizate of claim 3 containing about 1.0 phr stearic acid, 2.0 phr paraffin wax and about 2.0 phr polyethylene by weight of said vulcanizate.
Claim 6
Independent Claim
59 words
A method for improving the anti-blocking and processing release characteristics of a vinyl acetate-ethylene elastomeric copolymer vulcanizate which comprises substantially uniformly distributing in said vulcanizate an anti-blocking and processing release effective amount of an anti-blocking and processing release system comprising stearic acid, paraffin wax and a polyethylene having an average molecular weight of from about 1500 to about 4000.
Claim 7
Independent Claim
59 words
A method for improving the anti-blocking and processing release characteristics of a vinyl acetate-ethylene elastomeric copolymer vulcanizate which comprises substantially uniformly distributing in said vulcanizate an anti-blocking and processing release effective amount of an anti-blocking and processing release system comprising stearic acid, paraffin wax and a polyethylene having an average molecular weight of from about 1500 to about 4000.
Claim 8
Dependent Claim
28 words
The method of claim 5 wherein there is substantially uniformly distributed in the vinyl acetate-ethylene elastomeric copolymer vulcanizate, from about 40 to about 60% vinyl acetate by weight.
Claim 9
Dependent Claim
48 words
The method of claim 5 wherein there is substantially uniformly distributed in the vinyl acetate-ethylene elastomeric copolymer vulcanizate, from about 0.5 to about 1.5 phr stearic acid, about 1.0 to about 3.0 phr paraffin wax and about 1.0 to about 3.0 phr polyethylene by weight of said vulcanizate.
Claim 10
Dependent Claim
38 words
The method of claim 7 wherein there is substantially uniformly distributed in the vinyl acetate-ethylene elastomeric copolymer vulcanizate, from about 1.0 phr stearic acid, 2.0 phr paraffin wax and about 2.0 phr polyethylene by weight of said vulcanizate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |