US4707529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(siloxane)-modified epoxy resins
Assignee: Dow Chemical Co
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Filing: 1985-06-27
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Granted: 1987-11-17
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Expires: 2005-06-27
Abstract
Abstract Dispersions of siloxane polymers and optional dispersion stabilizers in a polyepoxide resin continuous phase are characterized in that the siloxane polymer is grafted to the polyepoxide resin, and the dispersions remain stable. The compositions are curable and are useful as coatings, in preparing laminates and reinforced plastics, and as adhesives.
Inventors
- 👤 Dwight K. Hoffman
- 👤 Reet T. Fernandez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:54
CPC Classifications
C; C08; C08G; C08G81/00; C08F; C08F299/00; C08F299/02; C08F299/026; C08F299/08; C08L; C08L63/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
91 words
A dispersion which comprises an uncured epoxy compound as a continuous phase having dispersed therein and grafted thereto an insoluble siloxane polymer, which dispersion is formed by contacting at elevated temperature (1) a functionalized, uncured epoxy compound adduct which is the reaction product of an uncured epoxy compound and a minor amount of a functional monomer and (2) a siloxane polymer having a vinyl functionally capable of reacting with the functionality of the adduct, whereby an insoluble dispersion of grafted siloxane polymer in the uncured epoxy compound continuous phase is formed.
Claim 2
Dependent Claim
91 words
A dispersion which comprises an uncured epoxy compound as a continuous phase having dispersed therein and grafted thereto an insoluble siloxane polymer, which dispersion is formed by contacting at elevated temperature (1) a functionalized, uncured epoxy compound adduct which is the reaction product of an uncured epoxy compound and a minor amount of a functional monomer and (2) a siloxane polymer having a vinyl functionally capable of reacting with the functionality of the adduct, whereby an insoluble dispersion of grafted siloxane polymer in the uncured epoxy compound continuous phase is formed.
Claim 3
Dependent Claim
23 words
The dispersion of claim 1 which is characterized in that the dispersion remains stable at least up to a temperature of 60° C.
Claim 4
Dependent Claim
13 words
The dispersion of claim 1 wherein said epoxy compound is a liquid polyepoxide.
Claim 5
Dependent Claim
16 words
The dispersion of claim 3 wherein said liquid polyepoxide is a diglycidyl ether of bixphenol A.
Claim 6
Dependent Claim
13 words
The dispersion of claim 1 wherein said epoxy compound is a solid polyepoxide.
Claim 7
Dependent Claim
13 words
The dispersion of claim 1 wherein said epoxy compound is a halogenated polyepoxide.
Claim 8
Dependent Claim
17 words
The dispersion of claim 6 wherein said halogenated polyepoxide is a polyglycidyl ether of brominated bisphenol A.
Claim 9
Dependent Claim
13 words
The dispersion of claim 1 wherein said epoxy compound is an epoxy novolac.
Claim 10
Dependent Claim
11 words
The dispersion of claim 1 wherein said epoxy compound is tris(glycidylphenyl)methane.
Claim 11
Dependent Claim
15 words
The disperson of claim 1 wherein said epoxy compound is tetraglycidyl ether of methylene dianiline.
Claim 12
Dependent Claim
10 words
The dispersion of claim 1 additionally containing a dispersion stabilizer.
Claim 13
Dependent Claim
47 words
The dispersion of claim 1 wherein said siloxane polymer is a vinyl terminated polydimethyl-siloxane, a vinylmethyl and dimethyl polysiloxane copolymer, a methacryloxypropylmethyl and dimethyl polysiloxane copolymer, a polymethyl(phenethylsiloxane) which is vinyldimethylsiloxy terminated, a vinyl terminated dimethyldiphenyl polysiloxane copolymer, a T-structure vinyl polydimethylsiloxane or a T-structure methacryloxypropyl polydimethylsiloxane.
Claim 14
Dependent Claim
98 words
A process of preparing a dispersion of an insoluble siloxane compound in an epoxy compound continuous phase which comprises contacting (1) a functionalized, uncured epoxy compound adduct which is the reaction product of an uncured epoxy compound and a minor amount of a functional monomer and (2) a siloxane polymer having a vinyl functionally capable of reacting with the functionally of the adduct, at an elevated temperature for a time sufficient to graft the siloxane polymer to the functionalized epoxy compound whereby an insoluble dispersion of grafted siloxane polymer in the uncured epoxy compound continuous phase is formed.
Claim 15
Dependent Claim
98 words
A process of preparing a dispersion of an insoluble siloxane compound in an epoxy compound continuous phase which comprises contacting (1) a functionalized, uncured epoxy compound adduct which is the reaction product of an uncured epoxy compound and a minor amount of a functional monomer and (2) a siloxane polymer having a vinyl functionally capable of reacting with the functionally of the adduct, at an elevated temperature for a time sufficient to graft the siloxane polymer to the functionalized epoxy compound whereby an insoluble dispersion of grafted siloxane polymer in the uncured epoxy compound continuous phase is formed.
Claim 16
Dependent Claim
23 words
The process of claim 13 wherein said epoxy compound adduct is a reaction product of an unsaturated carboxylic acid and an epoxy compound.
Claim 17
Dependent Claim
21 words
The process of claim 13 wherein said epoxy compound adduct is a reaction product of an unsaturated isocyanate and a polyepoxide.
Claim 18
Dependent Claim
22 words
The process of claim 13 wherein said epoxy compound adduct is the reaction product of an alkenyl substituted phenol and a polyepoxide.
Claim 19
Dependent Claim
19 words
The dispersion of claim 1 wherein the average particle size of the disperse phase is less than 20 microns.
Claim 20
Dependent Claim
22 words
The dispersion of claim 1 wherein the dispersed phase is from about 1 to about 70 percent by volume of the dispersion.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |