US3708555A
Expired / Lapsed
US
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Grafting of a mixture of styrene and maleic anhydride onto backbone polymers containing active or labile hydrogen atoms
Assignee: GAYLORD ASS
•
Filing: 1970-02-24
•
Granted: 1973-01-02
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Expires: 1990-02-24
Abstract
Abstract A process for preparation of carboxyl containing polymer products which comprises reacting polymers having active or labile hydrogen atoms with a mixture of styrene and maleic anhydride and carboxyl containing polymer products prepared thereby.
Inventors
- 👤 N Gaylord
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:00
CPC Classifications
C; C08; C08F; C08F291/00; C08C; C08C19/00; C08C19/28
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
30 words
The process of claim 1 in which the mixture of styrene and maleic anhydride is maintained at a temperature of 50*-70* C. and is added to the polymer undergoing deformation.
Claim 2
Dependent Claim
26 words
The process of claim 1 in which the mixture of styrene and maleic anhydride contains 1 to 1.5 moles of styrene per mole of maleic anhydride.
Claim 3
Dependent Claim
15 words
The process of claim 1 in which the reaction is carried out at 150*-250* C.
Claim 4
Dependent Claim
25 words
The process of claim 1 in which at least 10 percent of the total hydrogen atoms present on the polymer reacted are active hydrogen atoms.
Claim 5
Dependent Claim
12 words
The process of claim 5 in which the polymer reacted is cis-polybutadiene.
Claim 6
Dependent Claim
12 words
The process of claim 5 in which the polymer reacted is polystyrene.
Claim 7
Dependent Claim
12 words
The process of claim 5 in which the polymer reacted is polyethylene.
Claim 8
Dependent Claim
12 words
The process of claim 5 in which the polymer reacted is polypropylene.
Claim 9
Dependent Claim
13 words
The process of claim 5 in which the polymer reacted is polyvinyl chloride.
Claim 10
Dependent Claim
13 words
The process of claim 5 in which the polymer reacted is ethylene-propylene rubber.
Claim 11
Dependent Claim
14 words
The process of claim 5 in which the polymer reacted is a nitrile rubber.
Claim 12
Dependent Claim
25 words
The process of claim 1 in which the said reaction is carried out during fabrication of said polymer to yield a carboxylated shaped polymer product.
Claim 13
Dependent Claim
12 words
The process of claim 13 in which the product is a film.
Claim 14
Dependent Claim
12 words
The process of claim 13 in which the product is a fiber.
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |