US4797454A
Expired / Lapsed
US
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Curable resin systems containing cyanate ester functional oxazolinylpolysiloxanes
Assignee: Cytec Technology Corp
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Filing: 1987-09-24
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Granted: 1989-01-10
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Expires: 2007-09-24
Abstract
Abstract Cyanate-functional oxazolinylpolysiloxanes are useful for toughening high performance resin systems such as cyanates, epoxies, and bismaleimides without substantial loss of heat resistance.
Inventors
- 👤 Hong-Son Ryang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:13
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/30; C08G59/306; C08G59/40; C08G59/4007; C08G59/4014; C08G77/00; C08G77/04; C08G77/38; C08G77/382; C08G77/388
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
21 words
A cyanate-functional oxazolinylpolysiloxane modifier for heat curable resins which comprises the reaction product of an epoxy-functional polysiloxane and a polycyanate-functional monomer.
Claim 2
Dependent Claim
21 words
A cyanate-functional oxazolinylpolysiloxane modifier for heat curable resins which comprises the reaction product of an epoxy-functional polysiloxane and a polycyanate-functional monomer.
Claim 3
Dependent Claim
13 words
The modifier of claim 1 wherein said epoxy functional polysiloxane is a bis[3-glycidoxypropyl]polysiloxane.
Claim 4
Dependent Claim
28 words
The modifier of claim 1 wherein the mole ratio of cyanate groups in the polycyanate functional monomer to epoxy groups in the epoxy-functional polysiloxane is at least 2:1.
Claim 5
Dependent Claim
28 words
The modifier of claim 2 wherein the mole ratio of cyanate groups in the polycyanate functional monomer to epoxy groups in the epoxy-functional polysiloxane is at least 2:1.
Claim 6
Dependent Claim
66 words
The modifier of claim 2 wherein said epoxyfunctional polysiloxane corresponds to the formula: ##STR2## wherein each R is individually selected from the group consisting of C 1 -C 6 lower alkyl, C 1 -C 6 lower alkoxy, C 1-C 6 haloalkyl, vinyl, allyl, allyloxy, propenyl, propenyloxy, acetoxy, C 5 -C 10 cycloalkyl, and aryl radicals and wherein n is an integer from 1 to about 10,000.
Claim 7
Dependent Claim
20 words
The modifier of claim 5 wherein each R is individually selected from the group consisting of methyl and phenyl radicals.
Claim 8
Dependent Claim
12 words
The modifier of claim 1 wherein said polycyanate-functional monomer is a dicyanate.
Claim 9
Dependent Claim
30 words
The modifier of claim 7 wherein said dicyanate is selected from the group consisting of the cyanates of hydroquinone, bisphenol A, bisphenol F, bisphenol S, 2,2',6,6'-tetramethylbisphenol F, and phenolated dicyclopentadiene.
Claim 10
Dependent Claim
12 words
The modifier of claim 2 wherein said polycyanate-functional monomer is a dicyanate.
Claim 11
Dependent Claim
30 words
The modifier of claim 9 wherein said dicyanate is selected from the group consisting of the cyanates of hydroquinone, bisphenol A, bisphenol F, bisphenol S, 2,2',6,6'-tetramethylbisphenol F, and phenolated dicyclopentadiene.
Claim 12
Dependent Claim
20 words
A process for toughening a heat-curable resin comprising adding thereto a toughening amount of the cyanate-functional oxazolinylpolysiloxane of claim 1.
Claim 13
Dependent Claim
34 words
The process of claim 11 wherein said heat-curable resin is selected from the group consisting of cyanate-functional resins, epoxy resins, bismaleimide resins, and mixtures thereof, wherein the term cyanate-functional resin excludes the cyanate-functional oxazolinylpolysiloxanes.
Claim 14
Dependent Claim
10 words
A polysiloxane elastomer of the cyanate-functional oxazolinylpolysiloxane of 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) | 1992-01-10 | 1992-07-11 | 1993-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-10 | 1996-07-11 | 1997-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-10 | 2000-07-11 | 2001-01-10 | $7700.00 | Window Closed / Lapsed |