Patent USRE31310E successfully refreshed from Google Patents.
USRE31310E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact resistant vinyl ester resin and process for making same
Assignee: Dow Chemical Co
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Filing: 1980-02-25
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Granted: 1983-07-12
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Expires: 2000-02-25
Abstract
Abstract Vinyl ester resins with improved impact resistance and other benefits and advantages may be obtained by a process modification wherein up to 20 percent of the unsaturated monocarboxylic acid, which is reacted with a polyepoxide, is replaced by an equivalent amount of a liquid carboxy terminated polydiene rubber capable of reacting with epoxy groups to form a chemically bound molecule. .Iadd.
Inventors
- 👤 Daniel J. Najvar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:18
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4292; C08G8/00; C08G8/02
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
163 words
A process for preparing a thermosettable resin having improved impact resistance in the thermoset state which comprises .[.simultaneously.]. reacting the epoxide moieties of a polyepoxide having an average of more than one epoxide group per molecule with the acid moieties of an unsaturated monocarboxylic acid and a liquid carboxy terminated polydiene rubber wherein the combined acid equivalents of said unsaturated acid and said polydiene ranges from about 0.8 to 1.2 equivalents per epoxide equivalent and wherein at least about 80 percent of said acid equivalents comprises said unsaturated acid and the balance between 0.01 and 20 percent comprises said polydiene, provided that the polydiene rubber content is at least about 4 weight percent .Iadd.and wherein said resin is prepared by the simultaneous reaction of said polyepoxide, said polydiene rubber and said monocarboxylic acid or by the sequential reaction wherein said polyepoxide and said polydiene rubber are reacted followed by addition and reaction of said monocarboxylic acid with the product of that first reaction.Iaddend..
Claim 2
Dependent Claim
163 words
A process for preparing a thermosettable resin having improved impact resistance in the thermoset state which comprises .[.simultaneously.]. reacting the epoxide moieties of a polyepoxide having an average of more than one epoxide group per molecule with the acid moieties of an unsaturated monocarboxylic acid and a liquid carboxy terminated polydiene rubber wherein the combined acid equivalents of said unsaturated acid and said polydiene ranges from about 0.8 to 1.2 equivalents per epoxide equivalent and wherein at least about 80 percent of said acid equivalents comprises said unsaturated acid and the balance between 0.01 and 20 percent comprises said polydiene, provided that the polydiene rubber content is at least about 4 weight percent .Iadd.and wherein said resin is prepared by the simultaneous reaction of said polyepoxide, said polydiene rubber and said monocarboxylic acid or by the sequential reaction wherein said polyepoxide and said polydiene rubber are reacted followed by addition and reaction of said monocarboxylic acid with the product of that first reaction.Iaddend..
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein said polydiene rubber has a molecular weight of 2,000 to 20,000.
Claim 4
Dependent Claim
15 words
The process of claim 1 wherein said polydiene rubber molecular weight is 3,000 to 10,000.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein said polydiene rubber is a polymer of a conjugated diene monomer.
Claim 6
Dependent Claim
21 words
The process of claim 1 wherein said polydiene rubber is a copolymer of a conjugated diene and a copolymerizable vinyl monomer.
Claim 7
Dependent Claim
16 words
The process of claim 1 wherein said polydiene rubber is a copolymer of acrylonitrile and butadiene.
Claim 8
Dependent Claim
17 words
The process of claim 1 wherein said polyepoxide has an epoxide equivalent weight of 250 to 700.
Claim 9
Dependent Claim
18 words
The process of claim 1 further comprising the step of admixing the thermosettable resin with a copolymerizable monomer.
Claim 10
Dependent Claim
10 words
A thermosettable resin prepared by the process of claim 1.
Claim 11
Dependent Claim
10 words
A thermosettable resin prepared by the process of claim 2.
Claim 12
Dependent Claim
10 words
A thermosettable resin prepared by the process of claim 3.
Claim 13
Dependent Claim
10 words
A thermosettable resin prepared by the process of claim 4.
Claim 14
Dependent Claim
10 words
A thermosettable resin prepared by the process of claim 5.
Claim 15
Dependent Claim
10 words
A thermosettable resin prepared by the process of claim 6.
Claim 16
Dependent Claim
10 words
A thermosettable resin prepared by the process of claim 7.
Claim 17
Dependent Claim
10 words
A thermosettable resin prepared by the process of claim 8.
References Cited (Backward Citations)
US3674893A
Cited
US3808114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |