Patent US3674893A successfully refreshed from Google Patents.
US3674893A
Expired / Lapsed
US
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Thermosettable resins containing vinylester resin,polydiene rubbers and vinyl monomers
Assignee: Dow Chemical Co
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Filing: 1970-03-09
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Granted: 1972-07-04
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Expires: 1990-03-09
Abstract
Abstract Stable compositions are prepared from a mixture of an unsaturated vinyl ester thermosettable resin containing a copolymerizable monomer and an unsaturated polydiene rubber having an inherent viscosity between about 0.30 to 1.2 deciliters/gram. Thermoset articles reinforced with glass fibers, etc. prepared from said composition have improved properties such as impact strength, surface smoothness and paintability as well as good mechanical properties such as tensile strength and modulus. The compositions are noteworthy in their ability to accept pigments uniformly without producing mottling even with dark pigments.
Inventors
- 👤 Robert M Nowak
- 👤 Thomas O Ginter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:46
CPC Classifications
C; C08; C08L; C08L63/00; C08L63/10; C08F; C08F299/00; C08F299/02; C08F299/026; C08L67/00; C08L67/06
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
27 words
The composition of claim 1 wherein said polydiene rubber is a homopolymer of an unsaturated diene monomer or a polymer of two or more unsaturated diene monomers.
Claim 2
Dependent Claim
10 words
The composition of claim 2 wherein said rubber is polybutadiene.
Claim 3
Dependent Claim
18 words
The composition of claim 1 wherein said polymer contains at least 40 weight percent of said diene monomer.
Claim 4
Dependent Claim
15 words
The composition of claim 1 wherein said polymer is a styrene-butadiene or a butadiene-acrylonitrile polymer.
Claim 5
Dependent Claim
18 words
The composition of claim 1 wherein said copolymerizable monomer is a nitrile monomer or an alkenyl aromatic monomer.
Claim 6
Dependent Claim
19 words
The composition of claim 1 wherein said polydiene rubber has an inherrent viscosity of about 0.5 to 1.2 deciliters/gram.
Claim 7
Dependent Claim
23 words
The composition of claim 1 further comprising at least 15 parts of an inert filler per 100 parts of components (a) and (b).
Claim 8
Dependent Claim
11 words
The composition of claim 1 further comprising an inert reinforcing material.
Claim 9
Dependent Claim
11 words
A thermoset resin prepared by curing the composition of claim 1.
Claim 10
Dependent Claim
11 words
A thermoset resin prepared by curing the composition of claim 2.
Claim 11
Dependent Claim
11 words
A thermoset resin prepared by curing the composition of claim 3.
Claim 12
Dependent Claim
11 words
A thermoset resin prepared by curing the composition of claim 4.
Claim 13
Dependent Claim
11 words
A thermoset resin prepared by curing the composition of claim 5.
Claim 14
Dependent Claim
11 words
A thermoset resin prepared by curing the composition of claim 6.
Claim 15
Dependent Claim
11 words
A thermoset resin prepared by curing the composition of claim 7.
Claim 16
Dependent Claim
11 words
A thermoset resin prepared by curing the composition of claim 8.
Claim 17
Dependent Claim
11 words
A thermoset resin prepared by curing the composition of claim 9.
Claim 18
Dependent Claim
18 words
The composition of claim 1 wherein said vinyl ester is further reacted with an unsaturated dicarboxylic acid anhydride.
Claim 19
Dependent Claim
150 words
A stable thermosettable resin composition suitable for preparing reinforced plastic articles having improved impact strength, surface smoothness, uniformity of pigmentation and paintability which comprises a. an unsaturated resin comprising from about 25 to 70 weight percent of an unsaturated vinyl ester resin prepared by reacting about equivalent amounts of an unsaturated monocarboxylic acid with a polyepoxide having more than one epoxide group per molecule and from 75 to 30 weight percent of a copolymerizable monomer; and b. an unsaturated polyidene rubber containing at least about 30 weight percent of a conjugated diene monomer and the balance to make 100 percent of at least one other copolymerizable monomer and having an inherent viscosity of about 0.3 to 2.0 deciliters/gram; and c. at least 15 parts of an inert filler per 100 parts of components (a) and (b); wherein the weight ration of (b) and (a) ranges from about 5/95 to 15/85.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |