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US4294751A Expired / Lapsed US ⏱️ 0.0 years remaining

Polyester resin compositions

Assignee: Union Carbide Corp
•
Filing: 1980-04-14
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Granted: 1981-10-13
•
Expires: 2000-04-14
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Abstract

Abstract This invention involves a curable molding composition comprising a mixture of (a) a polyester of the following formula: ##STR1## wherein n has an average value between about 1.5 and 2, m is 2-n, R is the hydroxyl-free residue of a predominantly hydroxyl terminated polyester having a molecular weight not exceeding about 1500 and obtained by the condensation of a diol selected from the class consisting of 1,2-propylene glycol, 1,3-butanediol, 2,2-dimethyl-1,3-propanediol, dipropylene glycol, diethylene glycol, 2,2-dimethyl-3-hydroxypropyl 2,2-dimethyl-3-hydroxypropionate, the ethylene and propylene oxide derivatives of 2,2-bis(4-hydroxyphenyl)propane, and mixtures thereof, and mixtures of ethylene glycol and said diols, with a dicarboxylic acid or anhydride selected from the class consisting of maleic and anhdride, fumaric acid, ortho-phthalic acid and anhydride, isophthalic acid, terephthalic acid, carbic acid and anhydride, and mixtures thereof, (b) maleic anhydride, (c) an ethylenically unsaturated monomer which forms a homogeneous mixture with and is copolymerizable with (a) and (b), and (d) one or more reinforcing fibers having a melting point or a glass transition temperature above about 130° C.

Inventors

  • 👤 Hugh C. Gardner

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 22:06
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/04; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/676; C08G63/02; C08G63/12; C08G63/52; C08K; C08K3/00; C08K3/01; C08K3/013; C08K5/00; C08K5/49; C08K7/00; C08K7/02

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 165 words
A curable molding composition comprising a mixture of: (a) a polyester of the following formula ##STR5## wherein n has an average value between 1.5 and 2, m is 2-n, R is the hydroxyl-free residue of a predominantly hydroxyl terminated polyester having a molecular weight not exceeding about 1500 and obtained by the condensation of a diol selected from the class consisting of 1,2-propylene glycol, 1,3-butanediol, 2,2-dimethyl-1,3-propanediol, dipropylene glycol, diethylene glycol, 2,2-dimethyl-3-hydroxypropyl 2,2-dimethyl-3-hydroxypropionate, the ethylene and propylene oxide derivatives of 2,2-bis(4-hydroxyphenyl)propane, and mixtures thereof, and mixtures of ethylene glycol and said diols, with a dicarboxylic acid or anhydride selected from the class consisting of maleic acid and anhydride, fumaric acid, ortho-phthalic acid and anhydride, isophthalic acid, terephthalic acid, carbic acid and anhydride, and mixtures thereof, (b) maleic anhydride, (c) an ethylenically unsaturated monomer which forms a homogeneous mixture with and is copolymerizable with (a) and (b) and (d) one or more reinforcing fibers having a melting point or a glass transition temperature above about 130° C.
Claim 2
Dependent Claim 165 words
A curable molding composition comprising a mixture of: (a) a polyester of the following formula ##STR5## wherein n has an average value between 1.5 and 2, m is 2-n, R is the hydroxyl-free residue of a predominantly hydroxyl terminated polyester having a molecular weight not exceeding about 1500 and obtained by the condensation of a diol selected from the class consisting of 1,2-propylene glycol, 1,3-butanediol, 2,2-dimethyl-1,3-propanediol, dipropylene glycol, diethylene glycol, 2,2-dimethyl-3-hydroxypropyl 2,2-dimethyl-3-hydroxypropionate, the ethylene and propylene oxide derivatives of 2,2-bis(4-hydroxyphenyl)propane, and mixtures thereof, and mixtures of ethylene glycol and said diols, with a dicarboxylic acid or anhydride selected from the class consisting of maleic acid and anhydride, fumaric acid, ortho-phthalic acid and anhydride, isophthalic acid, terephthalic acid, carbic acid and anhydride, and mixtures thereof, (b) maleic anhydride, (c) an ethylenically unsaturated monomer which forms a homogeneous mixture with and is copolymerizable with (a) and (b) and (d) one or more reinforcing fibers having a melting point or a glass transition temperature above about 130° C.
Claim 3
Dependent Claim 33 words
A composition as in claim 1 wherein the combination of polyester (a) and maleic anhydride (b) are present in amounts of from about 25 to about 95 weight percent of the resinous portion.
Claim 4
Dependent Claim 13 words
A composition as in claim 1 wherein the ethylenically unsaturated monomer is styrene.
Claim 5
Dependent Claim 28 words
A composition as in claim 1 wherein the ethylenically unsaturated monomer is present in amounts of from about 5 to about 75 weight percent of the resinous portion.
Claim 6
Dependent Claim 19 words
A composition as in claim 1 wherein the reinforcing fiber is selected from fiberglass, carbon fibers, or polyamide fibers.
Claim 7
Dependent Claim 22 words
A composition as in claim 1 wherein the composition contains from about 15 to about 80 weight percent of the reinforcing fiber.
Claim 8
Dependent Claim 13 words
A cured article prepared from the composition of claims 1, 5, or 6.

References Cited (Backward Citations)

US2812313A Cited
US2824821A Cited
US2813055A Cited
US3692736A Cited
US3784586A Cited
US3766129A Cited
US3723390A Cited
US3721642A Cited
US3736278A Cited
US4102944A Cited
GB2000494A Cited
US4137279A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-10-12 1985-04-13 1985-10-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-10-12 1989-04-13 1989-10-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-10-12 1993-04-13 1993-10-13 $7700.00 Window Closed / Lapsed

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