US3882066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive composition comprising coal-tar pitch and olefinic copolymers
Assignee: Braskem America Inc
•
Filing: 1971-04-30
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Granted: 1975-05-06
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Expires: 1991-04-30
Abstract
Abstract Thermoplastic compositions comprising coal-tar pitch and a copolymer of ethylene and an ethylenically unsaturated carboxylic acid containing from 3 to 8 carbon atoms. The compositions exhibit high strength in shear and peel over a wide temperature range.
Inventors
- 👤 Jr Wayne E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:50
CPC Classifications
C; C09; C09J; C09J195/00; C08; C08L; C08L95/00; C09D; C09D195/00; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C09J135/00; C08L2666/00; C08L2666/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
58 words
A COMPOSITION COMPRISING IN PERCENT BY WEIGHT BETWEEN ABOUT 20 AND 50 PERCENT OF COAL-TAR PITCH AND BETWEEN ABOUT 80 AND 50 PERCENT OF A COPOLYMER CONSISTING ESSENTIALLY OF ETHYLENE AND AN ETHYLENICALLY-UNSATURATED CARBOXYLIC ACID CONTAINING FROM 3 TO 8 CARBON ATOMS, SAID RESIN HAVING AN ACID CONTENT OF BETWEEN ABOUT 0.1 AND ABOUT 75 PERCENT BY WEIGHT.
Claim 2
Dependent Claim
58 words
A COMPOSITION COMPRISING IN PERCENT BY WEIGHT BETWEEN ABOUT 20 AND 50 PERCENT OF COAL-TAR PITCH AND BETWEEN ABOUT 80 AND 50 PERCENT OF A COPOLYMER CONSISTING ESSENTIALLY OF ETHYLENE AND AN ETHYLENICALLY-UNSATURATED CARBOXYLIC ACID CONTAINING FROM 3 TO 8 CARBON ATOMS, SAID RESIN HAVING AN ACID CONTENT OF BETWEEN ABOUT 0.1 AND ABOUT 75 PERCENT BY WEIGHT.
Claim 3
Dependent Claim
21 words
A composition as defined in claim 1 in which said pitch has a ring-and-ball softening point between about 70*C and 200*C.
Claim 4
Dependent Claim
16 words
A composition as defined in claim 1 in which the unsaturated carboxylic acid is acrylic acid.
Claim 5
Dependent Claim
15 words
A composition as defined in claim 3 in which said composition includes finely-divided filler material.
Claim 6
Dependent Claim
23 words
A composition as defined in claim 3 in which said resin has an acid content between about 0.1 and 40 percent by weight.
Claim 7
Dependent Claim
23 words
A composition as defined in claim 3 in which said resin has an acid content between about 2 and 20 percent by weight.
Claim 8
Dependent Claim
20 words
A composition as defined in claim 3 in which said resin has a melt index between about 0.1 and 400.
Claim 9
Dependent Claim
20 words
A composition as defined in claim 3 in which said resin has a melt index between about 5 and 60.
Claim 10
Dependent Claim
21 words
A composition as defined in claim 3 in which said pitch has a ring-and-ball softening point between about 100* and 150*C.
Claim 11
Dependent Claim
62 words
A composition as defined in claim 3 in which said pitch has a ring-and-ball softening point between about 70* and 200*C and comprises between about 25 and 50 percent by weight of the composition, and said resin has an acrylic acid content between about 0.1 and 40 percent, said resin comprising between about 50 and 75 percent by weight of the composition.
Claim 12
Dependent Claim
71 words
A composition as defined in claim 3 in which said pitch has a ring-and-ball softening point between about 70* and 200*C and comprises between about 25 and 50 percent by weight of the composition, and said resin has an acrylic acid content between about 2 and 20 percent and a melt index between about 0.1 and 400, said resin comprising between about 50 and 75 percent by weight of the composition.
Claim 13
Dependent Claim
71 words
A composition as defined in claim 3 in which said pitch has a ring-and-ball softening point between about 100* and 150*C and comprises between about 25 and 50 percent by weight of the composition, and said resin has an acrylic acid content between about 2 and 20 percent and a melt index Between about 5 and 60, said resin comprising between about 50 and 75 percent by weight of the composition.
References Cited (Backward Citations)
US3132120A
Cited
US3215678A
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US3541035A
Cited
US3361692A
Cited
US3392131A
Cited
US3392132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |