US4096107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding compounds
Assignee: Owens Corning
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Filing: 1976-11-12
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Granted: 1978-06-20
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Expires: 1996-11-12
Abstract
Abstract A molding composition and method for the preparation of same wherein the molding composition is formulated of an unsaturated thermosetting prepolymer, a thermoplastic polymer prepared by interpolymerization of (1) a polymerizable ethylenic monomer, (2) an organic acid or anhydride containing at least one carboxyl group and one double bond per molecule, (3) an unsaturated elastomer having an average molecular weight less than 40,000 and (4) an unsaturated elastomer having an average molecular weight greater than 43,000, an unsaturated cross-linking agent which is capable of serving as a solvent for the prepolymer and the thermoplastic polymer and a non-reactive solvent. The combination of the thermoplastic polymer and the non-reactive solvent are believed to act together to reduce the amount of shrinkage of the thermosetting prepolymer when the latter is cured with the cross-linking agent.
Inventors
- 👤 Michael Graeg Roberts
- 👤 Charles Edwin Bolen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:01
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08F; C08F299/00; C08F299/02; C08F299/04
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
140 words
A molding composition comprising: (1) an unsaturated, thermosetting prepolymer; (2) a thermoplastic polymer prepared by interpolymerization of (a) at least one polymerizable ethylenic monomer, (b) an organic acid or anhydride containing at least one carboxyl group and one double bond per molecule, (c) an unsaturated elastomer having a weight average molecular weight less than 40,000, and (d) an unsaturated elastomer having a weight average molecular weight greater than 43,000 wherein each elastomer contains at least 10% by weight of a conjugated diene; (3) at least one unsaturated compound which is a solvent for the prepolymer and the thermoplastic polymer and which is capable of cross-linking the prepolymer; and (4) a non-reactive solvent, with the thermoplastic polymer and the non-reactive solvent each being present in a combined amount sufficient to reduce shrinkage on cross-linking of the prepolymer with the unsaturated compound.
Claim 2
Dependent Claim
140 words
A molding composition comprising: (1) an unsaturated, thermosetting prepolymer; (2) a thermoplastic polymer prepared by interpolymerization of (a) at least one polymerizable ethylenic monomer, (b) an organic acid or anhydride containing at least one carboxyl group and one double bond per molecule, (c) an unsaturated elastomer having a weight average molecular weight less than 40,000, and (d) an unsaturated elastomer having a weight average molecular weight greater than 43,000 wherein each elastomer contains at least 10% by weight of a conjugated diene; (3) at least one unsaturated compound which is a solvent for the prepolymer and the thermoplastic polymer and which is capable of cross-linking the prepolymer; and (4) a non-reactive solvent, with the thermoplastic polymer and the non-reactive solvent each being present in a combined amount sufficient to reduce shrinkage on cross-linking of the prepolymer with the unsaturated compound.
Claim 3
Dependent Claim
16 words
A molding composition as defined in claim 1 wherein the prepolymer is an unsaturated polyester resin.
Claim 4
Dependent Claim
33 words
A molding composition as defined in claim 1 wherein the prepolymer is an unsaturated thermosetting polyester resin prepared by condensation of an alpha, beta-ethylenically unsaturated dicarboxylic acid or anhydride with a polyhydric alcohol.
Claim 5
Dependent Claim
52 words
A molding composition in claim 1 wherein the polymerizable ethylenic monomer is a compound having the formula: CH.sub.2 ═ CH -- R wherein R is selected from the group of phenyl and substituted derivatives thereof, a halogen atom or a group of the formula: ##STR3## wherein R 1 is an alkyl group.
Claim 6
Dependent Claim
15 words
A molding composition as defined in claim 1 wherein the polymerizable ethylenic monomer is styrene.
Claim 7
Dependent Claim
37 words
A molding composition as defined in claim 1 wherein the organic acid or anhydride is selected from aliphatic carboxylic acids and their anhydrides containing 3 to 10 carbon atoms and 1 to 2 carboxyl groups per molecule.
Claim 8
Dependent Claim
17 words
A molding composition as defined in claim 1 wherein the organic acid or anhydride is maleic anhydride.
Claim 9
Dependent Claim
22 words
A molding composition as defined in claim 1 wherein (c) has an average molecular weight ranging from about 500 to about 40,000.
Claim 10
Dependent Claim
22 words
A molding composition as defined in claim 1 wherein (d) has an average molecular weight ranging from about 43,000 to about 380,000.
Claim 11
Dependent Claim
34 words
A molding composition as defined in claim 1 wherein each of (c) and (d) contain at least 10% by weight of a conjugated diene selected from the group consisting of butadiene, chloroprene and isoprene.
Claim 12
Dependent Claim
34 words
A molding composition as defined in claim 1 wherein the thermoplastic polymer is prepared by interpolymerizing a comonomer, said comonomer being selected from the group of alkyl acrylates and methacrylates, acrylonitrile and vinyl pyridine.
Claim 13
Dependent Claim
57 words
A molding composition as defined in claim 1 wherein the thermoplastic polymer is prepared by interpolymerization of 15 to about 99% by weight of the polymerizable ethylenic monomer, about 0.1 to 5% by weight of the organic acid or anhydride, about 0.1 to 7.5% by weight of (d) and about 0.1 to 15% by weight of (c).
Claim 14
Dependent Claim
34 words
A molding composition as defined in claim 1 wherein the thermoplastic polymer is prepared by terminating the polymerization reaction before 50% conversion is reached, as determined by the solids content of the polymerization mixture.
Claim 15
Dependent Claim
17 words
A molding composition as defined in claim 1 wherein the organic acid or anhydride is acrylic acid.
Claim 16
Dependent Claim
53 words
A molding composition as defined in claim 1 wherein the unsaturated compound is a compound having the formula CH.sub.2 ═ CH -- R wherein R is selected from the group of phenyl and substituted derivatives thereof, a halogen atom or a group of the formula: ##STR4## wherein R 1 is an alkyl group.
Claim 17
Dependent Claim
20 words
A molding composition as defined in claim 1 wherein the unsaturated compound is the same as the polymerizable ethylenic monomer.
Claim 18
Dependent Claim
14 words
A molding composition as defined in claim 1 wherein the unsaturated compound is styrene.
Claim 19
Dependent Claim
44 words
A molding composition as defined in claim 1 wherein the non-reactive solvent is a normally liquid organic compound which does not cause agglomeration of the components of the molding composition and has a boiling point ranging from about 25° C to about 250° C.
Claim 20
Dependent Claim
22 words
A molding composition as defined in claim 1 wherein the non-reactive solvent is selected from the group consisting of toluene and benzene.
Claim 21
Dependent Claim
30 words
A molding composition as defined in claim 1 wherein the composition contains the thermoplastic polymer and the thermosetting prepolymer in a weight ration ranging from about 1:1 to about 1:10.
Claim 22
Dependent Claim
39 words
A molding composition as defined in claim 1 wherein the non-reactive solvent is present in an amount ranging from about 2.5 to about 35% based upon the total of the solids of the thermoplastic polymer and the thermosetting prepolymer.
Claim 23
Dependent Claim
12 words
A molding composition as defined in claim 1 which includes reinforcing fillers.
Claim 24
Dependent Claim
14 words
A molding composition as defined in claim 22 wherein the fillers comprise glass fibers.
Claim 25
Independent Claim
129 words
A method for the preparation of a molding composition comprising (1) blending together (A) an unsaturated thermosetting prepolymer (B) a thermoplastic polymer prepared by interpolymerization of (a) at least one polymerizable ethylenic monomer, (b) an organic acid or anhdyride containing at least one carboxyl group and one double bond per molecule, (c) an unsaturated elastomer having a weight average molecular weight less than 40,000, and (d) an unsaturated elastomer having a weight average molecular weight greater than 43,000 wherein each elastomer contains at least 10% by weight of a conjugated diene; (C) at least one unsaturated compound which is a solvent for the prepolymer and the thermoplastic polymer and which is capable of cross-linking the prepolymer; and (D) a non-reactive solvent, (2) and adding fillers to the resulting blend.
Claim 26
Independent Claim
129 words
A method for the preparation of a molding composition comprising (1) blending together (A) an unsaturated thermosetting prepolymer (B) a thermoplastic polymer prepared by interpolymerization of (a) at least one polymerizable ethylenic monomer, (b) an organic acid or anhdyride containing at least one carboxyl group and one double bond per molecule, (c) an unsaturated elastomer having a weight average molecular weight less than 40,000, and (d) an unsaturated elastomer having a weight average molecular weight greater than 43,000 wherein each elastomer contains at least 10% by weight of a conjugated diene; (C) at least one unsaturated compound which is a solvent for the prepolymer and the thermoplastic polymer and which is capable of cross-linking the prepolymer; and (D) a non-reactive solvent, (2) and adding fillers to the resulting blend.
Claim 27
Dependent Claim
13 words
A method as defined in claim 24 wherein the fillers comprise glass fibers.
Claim 28
Independent Claim
148 words
A method for molding glass fiber reinforced plastics comprising (1) blending together (A) an unsaturated thermosetting prepolymer (B) a thermoplastic polymer prepared by interpolymerization of (a) at least one polymerizable ethylenic monomer, (b) an organic acid or anhydride containing at least one carboxyl group and one double bond per molecule, (c) an unsaturated elastomer having a weight average molecular weight less than 40,000, and (d) an unsaturated elastomer having a weight average molecular weight greater than 43,000 wherein each elastomer contains at least 10% by weight of a conjugated diene; (C) at least one unsaturated compound which is a solvent for the prepolymer and the thermoplastic polymer and which is capable of cross-linking the prepolymer; and (D) a non-reactive solvent, (2) adding fillers to the resulting blend, (3) adding a free radial catalyst to the resulting blend, and (4) molding the resulting composition to form a molded article.
Claim 29
Independent Claim
148 words
A method for molding glass fiber reinforced plastics comprising (1) blending together (A) an unsaturated thermosetting prepolymer (B) a thermoplastic polymer prepared by interpolymerization of (a) at least one polymerizable ethylenic monomer, (b) an organic acid or anhydride containing at least one carboxyl group and one double bond per molecule, (c) an unsaturated elastomer having a weight average molecular weight less than 40,000, and (d) an unsaturated elastomer having a weight average molecular weight greater than 43,000 wherein each elastomer contains at least 10% by weight of a conjugated diene; (C) at least one unsaturated compound which is a solvent for the prepolymer and the thermoplastic polymer and which is capable of cross-linking the prepolymer; and (D) a non-reactive solvent, (2) adding fillers to the resulting blend, (3) adding a free radial catalyst to the resulting blend, and (4) molding the resulting composition to form a molded article.
References Cited (Backward Citations)
US3998909A
Cited
US3956421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |