Patent CA1129580A successfully refreshed from Google Patents.
CA1129580A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
High-speed pultrusion polyester resins and process
Assignee: Beazer East Inc
•
Filing: 1980-07-22
•
Granted: 1982-08-10
•
Expires: 2000-07-22
Abstract
Abstract Abstract The speed of pultrusion can be increased and the quantity of pul-truded products can be improved by using a polyester resin composition con-taining 4-10 parts of certain cellulose acetate butyrate resins per 100 parts of polyester resin.
Inventors
- 👤 Terry S. Mcquarrie
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-05 23:03
CPC Classifications
—
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
152 words
In a pultrusion process the improvement which comprises using a polyester resin composition comprising a homogeneous admixture of: (A) 40-60 parts of a polyester made by the condensation of reactants consisting essentially of from about 65-85 mole percent of an alpha, beta-unsaturated diacid or anhydride, from about 15-35 mole percent of a saturated diacid or anhydride and up to about 110 mole percent of a glycol, the polyester having an alpha, beta-unsaturation equivalent weight of about 200-275 and a monomer compatibility of about 25 percent or less; (B) 40-60 parts of a monomer or mixture of monomers copolymer-izable with the polyester, the total of (A) and (B) being 100 parts, and giving a polyester resin which when cured has a Barcol hardness of at least 45; (C) 4-10 parts of a cellulose acetate butyrate resin that is: (1) soluble in the polyester resin; (2) causes the admixture when cured to be opaque.
Claim 2
Dependent Claim
152 words
In a pultrusion process the improvement which comprises using a polyester resin composition comprising a homogeneous admixture of: (A) 40-60 parts of a polyester made by the condensation of reactants consisting essentially of from about 65-85 mole percent of an alpha, beta-unsaturated diacid or anhydride, from about 15-35 mole percent of a saturated diacid or anhydride and up to about 110 mole percent of a glycol, the polyester having an alpha, beta-unsaturation equivalent weight of about 200-275 and a monomer compatibility of about 25 percent or less; (B) 40-60 parts of a monomer or mixture of monomers copolymer-izable with the polyester, the total of (A) and (B) being 100 parts, and giving a polyester resin which when cured has a Barcol hardness of at least 45; (C) 4-10 parts of a cellulose acetate butyrate resin that is: (1) soluble in the polyester resin; (2) causes the admixture when cured to be opaque.
Claim 3
Dependent Claim
18 words
The process as in Claim 1 wherein the monomer consists essen-tially of styrene, vinyl toluene or mixtures thereof.
Claim 4
Dependent Claim
17 words
The process as in Claim 1 wherein the quantity of cellulose acetate butyrate resin is 5-8 parts.
Claim 5
Dependent Claim
23 words
The process as in Claim 1 wherein the cellulose acetate butyrate resin has an average butyrate content of about 44 percent or higher.
Claim 6
Dependent Claim
25 words
The process as in Claim 1 wherein there is used 45 to 55 parts of the polyester and 55 to 45 parts of the monomer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.