Patent US4708996A successfully refreshed from Google Patents.
US4708996A
Expired / Lapsed
US
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Stable dispersions of polymers in polyepoxides
Assignee: Dow Chemical Co
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Filing: 1984-10-25
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Granted: 1987-11-24
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Expires: 2004-10-25
Abstract
Abstract Dispersions of polymers and optional dispersion stabilizers in a polyepoxide resin continuous phase is characterized in that the dispersion remains stable above 60° C. The compositions are curable and are useful as coatings, in preparing laminates and reinforced plastics, and as adhesives. The compositions exhibit properties which are superior to compositions containing reactive liquid polymers.
Inventors
- 👤 Dwight K. Hoffman
- 👤 Charles B. Arends
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:22
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/10; C08F299/00; C08F299/02; C08F299/026; Y; Y10; Y10S; Y10S525/00; Y10S525/922
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
74 words
A dispersion which comprises an uncured polyepoxide as a continuous phase having dispersed therein (i) an insoluble polymer and (ii) a dispersion stabilizer which has a moiety compatible with the polyepoxide and a moiety compatible with the insoluble polymer, said insoluble polymer having been polymerized in situ in the uncured polyepoxide and in the presence of the dispersion stabilizer, the dispersion further characterized in that it remains stable at a temperature above 60° C.
Claim 2
Dependent Claim
74 words
A dispersion which comprises an uncured polyepoxide as a continuous phase having dispersed therein (i) an insoluble polymer and (ii) a dispersion stabilizer which has a moiety compatible with the polyepoxide and a moiety compatible with the insoluble polymer, said insoluble polymer having been polymerized in situ in the uncured polyepoxide and in the presence of the dispersion stabilizer, the dispersion further characterized in that it remains stable at a temperature above 60° C.
Claim 3
Dependent Claim
23 words
The dispersion of claim 1 which is characterized in that the dispersion remains stable in the polyepoxide at a temperature above 90° C.
Claim 4
Dependent Claim
12 words
The dispersion of claim 1 wherein said polyepoxide is a liquid polyepoxide.
Claim 5
Dependent Claim
16 words
The dispersion of claim 3 wherein said liquid polyepoxide is a diglycidyl ether of bisphenol A.
Claim 6
Dependent Claim
12 words
The dispersion of claim 1 wherein said polyepoxide is a solid polyepoxide.
Claim 7
Dependent Claim
12 words
The dispersion of claim 1 wherein said polyepoxide 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
12 words
The dispersion of claim 1 wherein said polyepoxide is an epoxy novolac.
Claim 10
Dependent Claim
10 words
The dispersion of claim 1 wherein said polyepoxide is tris(glycidylphenyl)methane.
Claim 11
Dependent Claim
14 words
The dispersion of claim 1 wherein said polyepoxide is tetraglycidyl ether of methylene dianiline.
Claim 12
Dependent Claim
23 words
The dispersion of claim 1 wherein said polymer is an organic polymer which is the polymerizate of at least one ethylenically unsaturated monomer.
Claim 13
Dependent Claim
14 words
The dispersion of claim 11 wherein said ethylenically unsaturated monomer is an alkyl acrylate.
Claim 14
Dependent Claim
19 words
The dispersion of claim 12 wherein said alkyl acrylate comprises an alkyl group containing greater that 4 carbon atoms.
Claim 15
Dependent Claim
12 words
The dispersion of claim 13 wherein said alkyl acrylate is 2-ethylhexyl acrylate.
Claim 16
Dependent Claim
41 words
The dispersion of claim 1 wherein said dispersion stabilizer is the polymerizate of at least one vinyl monomer and a vinylized epoxy resin adduct which is prepared by reacting an oxirane moiety of a polyepoxide with an ethylenically unsaturated functional monomer.
Claim 17
Dependent Claim
23 words
The dispersion of claim 15 wherein said vinylized epoxy resin adduct is a reaction product of an unsaturated carboxylic acid and a polyepoxide.
Claim 18
Dependent Claim
23 words
The dispersion of claim 16 wherein said reaction product is an acrylic or methacrylic acid ester of the diglycidyl ether of bisphenol A.
Claim 19
Dependent Claim
21 words
The dispersion of claim 16 wherein said reaction product is an ester of a diglycidyl ether of a halogenated bisphenol A.
Claim 20
Dependent Claim
19 words
The dispersion of claim 16 wherein said reaction product is an ester of a polyglycidyl ether of a novolac.
Claim 21
Dependent Claim
14 words
The dispersion of claim 16 wherein said reaction product is an ester of tris(glycidylphenyl)methane.
Claim 22
Dependent Claim
19 words
The dispersion of claim 1 wherein the average particle size of the disperse phase is less than 20 microns.
Claim 23
Dependent Claim
20 words
The dispersion of claim 1 wherein the disperse phase is from 5 to 70 percent by volume of the dispersion.
Claim 24
Dependent Claim
59 words
The dispersion of of claim 1 which is prepared by (1) providing an adduct by reacting a minor amount of functional monomer with a polyepoxide continuous phase (2) providing a dispersion stabilizer by reacting the adduct with at least one monomer, and (3) polymerizing said monomer(s) in the polyepoxide continuous phase and in the presence of said dispersion stabilizer.
Claim 25
Dependent Claim
58 words
The dispersion of claim 1 which is prepared by (1) providing an adduct by reacting a minor amount of functional monomer with a polyepoxide continuous phase (2) providing a dispersion stabilizer by reacting the adduct with at least one monomer, while simultaneously polymerizing said monomer(s) in the polyepoxide continuous phase and in the presence of said dispersion stabilizer.
Claim 26
Dependent Claim
78 words
The dispersion of claim 1 which is prepared by reacting a small amount of an unsaturated compound having an oxirane-reactive functionality with an excess of a polyepoxide at a temperature above the softening point of the polyepoxide to form a blend of polyepoxide and a dispersion stabilizer-precursor having free oxirane groups, adding vinyl monomer thereto, to form a dispersion which is then polymerized at a temperature above the softening point of the polyepoxide without curing said oxirane groups.
Claim 27
Dependent Claim
22 words
The dispersion of claim 15 wherein said vinylized epoxy resin adduct is a reaction product of an unsaturated isocyanate and a polyepoxide.
Claim 28
Dependent Claim
21 words
The dispersion of claim 26 wherein said unsaturated isocyanate is isocyanatoethyl methacrylate and said polyepoxide is a diglycidyl ether of bisphenol.
Claim 29
Dependent Claim
23 words
The dispersion of claim 15 wherein said vinylized epoxy resin adduct is the reaction product of an alkenyl substituted phenol and a polyepoxide.
Claim 30
Dependent Claim
22 words
The dispersion of claim 28 wherein said alkenyl phenol is isopropenyl phenol and said polyepoxide is a diglycidyl ether of bisphenol A.
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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) | 1990-11-23 | 1991-05-25 | 1991-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-23 | 1995-05-25 | 1995-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-23 | 1999-05-25 | 1999-11-24 | $7700.00 | Window Closed / Lapsed |