Patent US3776751A successfully refreshed from Google Patents.
US3776751A
Expired / Lapsed
US
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Method of producing reinforced thermoplastic materials
Assignee: Imperial Chemical Industries Ltd
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Filing: 1971-04-26
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Granted: 1973-12-04
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Expires: 1991-04-26
Abstract
Abstract Depositing a copolymer of acrylonitrile and aromatic olefin from an emulsion onto a glass-fibre reinforcing material, separating and drying the coated reinforcing material.
Inventors
- 👤 J Davis
- 👤 B Hendy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:38
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/0405; C08J5/043; C08J2333/00; C08J2333/18; C08J2333/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
12 words
A process according to claim 1 wherein said aromatic olefin is styrene.
Claim 2
Dependent Claim
49 words
A process according to claim 1 in which the thermoplastic material is mixed with the reinforcing material in the state in which it is obtained from the polymerisation vessel and deposited onto the reinforcing material by adding a substance which destroys the effect of the emulsifying or dispersing agent.
Claim 3
Dependent Claim
25 words
A process according to claim 1 in which the reinforcing material is added to the polymer in the polymerisation vessel in which it is produced.
Claim 4
Dependent Claim
17 words
A process according to claim 1 in which the reinforcing material is coated with a coupling agent.
Claim 5
Dependent Claim
99 words
A process for the production of reinforced sheet which comprises passing a continuous web of fibrous material through an aqueous emulsion or dispersion containing a thermoplastic copolymer of acrylonitrile and at least one aromatic olefin, said copolymer containing at least 50 percent by weight of units derived from acrylonitrile and then passing the web through a bath of a coagulant which releases the thermoplastic copolymer and deposits it on the web of fibrous material, drying the coated web and passing it between at least one pair of compression rollers heated to above the softening temperature of the thermoplastic copolymer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |