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US4294751A Expired / Lapsed US ⏱️ 0.0 years remaining

Polyester resin compositions

Assignee: Union Carbide Corp
•
Filing: 1980-04-14
•
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 07:33
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
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US2813055A Cited
US3692736A Cited
US3784586A Cited
US3766129A Cited
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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) 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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