US4086203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibers sized with polyester and polyurethane precursors
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1975-04-23
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Granted: 1978-04-25
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Expires: 1995-04-23
Abstract
Abstract A fibrous product comprises a core component which may be inorganic or organic, and a sheath component, said sheath component being a composite polymeric material comprising polyurethane and polyester and/or vinyl polymer. The sheath component may be applied to the core in the form of a gel polymerizate comprising polyurethane precursors or a polyurethane together with a polyester resin precursor comprising an ethylenically unsaturated polyester and an ethylenically unsaturated monomer.
Inventors
- 👤 Bryan Shaw
- 👤 Valerie Lawton
- 👤 James McAinsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:20
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/06; C08J5/08; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/26; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/68; C08J5/24; C08J5/248; C08K; C08K9/00; C08K9/04; C08L; C08L75/00; C08L75/04; C08J2367/00; C08J2367/06; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
119 words
A method of forming fiber reinforced composites comprising: (1) coating a fiber with a size which comprises (a) a mixture of from 5-95% by weight of a polyurethane or precursors thereof having at least one polyfunctional compound containing groups reactive with isocyanate groups and at least one polyisocyanate together with (b) from 95-5% by weight of a cross-linked polyester resin precursor comprising: (i) at least one ethylenically unsaturated polyester, and; (ii) at least one ethylenically unsaturated monomer copolymerizable with said unsaturated polyester; (2) partially or completely curing the size; (3) mixing the sized fiber with curable resin; (4) subjecting the mixture to a shaping operation during or after its preparation; (5) curing the resin and any incompletely cured size.
Claim 2
Independent Claim
119 words
A method of forming fiber reinforced composites comprising: (1) coating a fiber with a size which comprises (a) a mixture of from 5-95% by weight of a polyurethane or precursors thereof having at least one polyfunctional compound containing groups reactive with isocyanate groups and at least one polyisocyanate together with (b) from 95-5% by weight of a cross-linked polyester resin precursor comprising: (i) at least one ethylenically unsaturated polyester, and; (ii) at least one ethylenically unsaturated monomer copolymerizable with said unsaturated polyester; (2) partially or completely curing the size; (3) mixing the sized fiber with curable resin; (4) subjecting the mixture to a shaping operation during or after its preparation; (5) curing the resin and any incompletely cured size.
Claim 3
Dependent Claim
17 words
A method according to claim 1 in which the size coat is less than 0.1 mm thick.
Claim 4
Dependent Claim
38 words
A method according to claim 1 in which the molar proportion of groups reactive with isocyanate groups in the polyfunctional compound plus ethylenically unsaturated polyester to isocyanate groups in the polyisocyanate is in the range 0.8:1 to 1.2:1.
Claim 5
Dependent Claim
25 words
A method according to claim 3 in which the polyisocyanate comprises at least one compound of the structure ##STR2## where X is a divalent radical.
Claim 6
Dependent Claim
42 words
A method according to claim 4 in which X is O, SO 2 , or --(CR 1 R 2 )-- where R 1 and R 2 may be hydrogen or lower alkyl groups and n is an integer from 1 to 3.
Claim 7
Dependent Claim
14 words
A method according to claim 5 in which the fiber is in continuous lengths.
Claim 8
Dependent Claim
14 words
A method according to claim 6 in which the fiber is glass or carbon.
Claim 9
Dependent Claim
27 words
A method according to claim 7 in which the fiber is glass and the size is applied to the glass within a short distance from where spun.
Claim 10
Dependent Claim
14 words
A method according to claim 1 in which the size is applied in solution.
References Cited (Backward Citations)
US3234042A
Cited
US2780612A
Cited
US3066383A
Cited
US3453652A
Cited
US3471439A
Cited
US3578728A
Cited
US3886229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |