US3932332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of alpha-methylstyrene and styrene and uses thereof
Assignee: Hercules LLC
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Filing: 1973-02-16
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Granted: 1976-01-13
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Expires: 1993-02-16
Abstract
Abstract This specification discloses manufacture of copolymers of alpha-methylstyrene and styrene in which the alpha-methylstryene may range from about 50 to 90% and the softening point may range from about 60° to 100°C. The copolymers have especial utility with elastomers to produce pressure sensitive adhesives and the like, and in hot melt coatings.
Inventors
- 👤 Paul S. Douglas
- 👤 Anargiros Pete Patellis
- 👤 Walter A. Vredenburgh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:20
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/12; C08L; C08L21/00; C08L25/00; C08L25/02; C08L25/16; C09; C09J; C09J123/00; C09J123/02; C09J123/04; C09J123/08; C09J125/00; C09J125/02; C09J125/16; C08F212/08; C08L11/00; C08L2205/00; C08L2205/02; C08L2666/00; C08L2666/02; C08L53/00; C08L53/02; C08L9/00; C08L9/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
44 words
A hot melt composition comprising (i) a wax selected from the group consisting of paraffin wax and microcrystalline wax, (ii) ethylene vinyl acetate, and (iii) a copolymer of alpha-methylstyrene and styrene which copolymer has a softening point (ring and ball) up to about 100°C.
Claim 2
Dependent Claim
44 words
A hot melt composition comprising (i) a wax selected from the group consisting of paraffin wax and microcrystalline wax, (ii) ethylene vinyl acetate, and (iii) a copolymer of alpha-methylstyrene and styrene which copolymer has a softening point (ring and ball) up to about 100°C.
Claim 3
Dependent Claim
24 words
A hot melt composition as set forth in claim 1 in which the softening point of the copolymer is about from 70°C to 80°C.
Claim 4
Dependent Claim
26 words
A hot melt composition as set forth in claim 1 in which the alpha-methylstyrene and styrene have been copolymerized within a temperature range of about 5°C.
References Cited (Backward Citations)
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Cited
US3401131A
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US3429843A
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US3644252A
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US3654250A
Cited
US3725506A
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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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |