US5002830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibrous reinforced materials impregnated with low viscosity polyurethanes/urea forming components
Assignee: HUNTSMAN ICI HOLDINGS LLC
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Filing: 1989-08-01
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Granted: 1991-03-26
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Expires: 2009-08-01
Abstract
Abstract Improved reinforced polyurethane/urea articles are made by reacting an organic polyisocyanate with low viscosity imino/enamine-functional compounds in contact with fiberous reinforcing agents.
Inventors
- 👤 Herbert R. Gillis
- 👤 I. Sioun Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:38
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564; C; C08; C08J; C08J5/00; C08J5/04; B; B29; B29C; B29C67/00; B29C67/24; B29C67/246; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/285; C08G18/30; C08G18/32; C08G18/3225; C08G18/3253; C08G18/3256; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6681; C08G18/6685; C08G2120/00; C08J2375/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
98 words
A method for the production of composite material which comprises impregnating a fibrous reinforcing material with a polymer-forming reaction mixture comprising : 1 a polyisocyanate component having a viscosity less than 100 centipoises, and 2 an isocyanate-reactive component having a viscosity less than 100 centipoises containing an imino-functional compound or enamine containing compound having a molecular weight in the range from about 43 to about 600 and a viscosity less than 50 centipoises, all of said viscosities being measured at 25° C. or at the melting point in the case of material that are solid at 25° C.
Claim 2
Independent Claim
98 words
A method for the production of composite material which comprises impregnating a fibrous reinforcing material with a polymer-forming reaction mixture comprising : 1 a polyisocyanate component having a viscosity less than 100 centipoises, and 2 an isocyanate-reactive component having a viscosity less than 100 centipoises containing an imino-functional compound or enamine containing compound having a molecular weight in the range from about 43 to about 600 and a viscosity less than 50 centipoises, all of said viscosities being measured at 25° C. or at the melting point in the case of material that are solid at 25° C.
Claim 3
Dependent Claim
77 words
A method according to claim 1 wherein the imino-functional compound has the formula: ##STR12## wherein X, Y and Z are chemical moieties which collectively form the rest of said compound and are each independently selected from the group consisting of H and organic radicals which are attached to the imino unit C═N-- of said compound through N, C, O, S, Si or P ; the central carbon atom of said imino unit being bonded to three atoms.
Claim 4
Dependent Claim
17 words
A method according to claim 2 wherein said imino-functional compound contains from 1 to 4 imino units.
Claim 5
Dependent Claim
66 words
A method according to claim 1 wherein said enamine containing compound has the formula : ##STR13## wherein each of A, B, E, J and L, independently, represents hydrogen or an optionally substituted hydrocarbon radical, any of A, B, E, G, J and/or L optionally being joined together to form one or more carbocyclic or heterocyclic rings, and D represents hydrogen or an optionally substituted hydrocarbon radical.
Claim 6
Dependent Claim
42 words
A method according to claim 1 wherein the viscosity of said imino-functional compound or enamine containing compound is less than 25 centipoises at 25 C or at the melting point in the case of a compound that is solid at 25° C.
Claim 7
Dependent Claim
18 words
A method according to claim 1 wherein said reaction mixture contains a polymerisable unsaturated compound or epoxy monomer.
Claim 8
Dependent Claim
23 words
A method according to claim 1 wherein said composite material contains at least about 10 % by weight of the fibrous reinforcing material.
Claim 9
Dependent Claim
36 words
A method according to claim 1 wherein said polyisocyanate and isocyanate-reactive components are reacted together in combination with internal mould release agents selected from salts of fatty acids and silicones using the reaction injection moulding technique.
Claim 10
Dependent Claim
17 words
A method according to claim 8 whehrein said reinforcing fiber is placed in a reaction injection mould.
Claim 11
Dependent Claim
9 words
A cured reinforced composite made according to claim 1.
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) | 1994-03-25 | 1994-09-24 | 1995-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-25 | 1998-09-24 | 1999-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-25 | 2002-09-24 | 2003-03-26 | $7700.00 | Window Closed / Lapsed |