US4789712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable dispersions of polymers in polyepoxides
Assignee: Dow Chemical Co
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Filing: 1987-08-10
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Granted: 1988-12-06
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Expires: 2007-08-10
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
2026-10-30 18:23
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/026; C08F283/00; C08F283/10; Y; Y10; Y10S; Y10S525/00; Y10S525/922
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
82 words
A process for preparing a stable polymer-in-polyepoxide dispersion wherein a small amount of an unsaturated compound having an oxirane-reactive functionality is reacted 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 ethylenically unsaturated monomer thereto which is then polymerized at a temperature above the softening point of the polyepoxide without curing said oxirane groups to form a stable polymer-in-polyepoxide dispersion.
Claim 2
Dependent Claim
82 words
A process for preparing a stable polymer-in-polyepoxide dispersion wherein a small amount of an unsaturated compound having an oxirane-reactive functionality is reacted 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 ethylenically unsaturated monomer thereto which is then polymerized at a temperature above the softening point of the polyepoxide without curing said oxirane groups to form a stable polymer-in-polyepoxide dispersion.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein said polyepoxide is a liquid polyepoxide.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein said ethylenically unsaturated monomer is an alkyl acrylate.
Claim 5
Dependent Claim
12 words
The method of claim 3 wherein said alkyl acrylate is 2-ethylically acrylate.
Claim 6
Dependent Claim
21 words
The method of claim 1 wherein the dispersion stabilizer-precursor is the reaction product of an unsaturated carboxylic acid and a polyepoxide.
Claim 7
Dependent Claim
20 words
The method of claim 1 wherein the dispersion stabilizer-precursor is the reaction product of an unsaturated isocyanate and a polyepoxide.
Claim 8
Dependent Claim
21 words
The method of claim 1 wherein the dipersion stabilizer-precursor is the reaction product of an alkenyl substituted phenol and a polyepoxide.
Claim 9
Dependent Claim
15 words
The method of claim 1 wherein additional polyepoxide is added with the ethylenically unsautrated monomer.
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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) | 1991-12-06 | 1992-06-06 | 1992-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-06 | 1996-06-06 | 1996-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-06 | 2000-06-06 | 2000-12-06 | $7700.00 | Window Closed / Lapsed |