US4352906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blister resistant calcium carbonate filled polyisocyanurate resin molding compositions
Assignee: Beazer East Inc
•
Filing: 1981-08-06
•
Granted: 1982-10-05
•
Expires: 2001-08-06
Abstract
Abstract Fully cured calcium carbonate filled polyisocyanurate/polyurethane sheet molding compositions are improved in blister resistance at temperatures of 175°-205° C. by the incorporation therewith of from 0.05-2% based upon the weight of the carbonate of a polybutadiene telomers maleic anhydride addition products. Such compositions are most blister resistant when the polybutadiene telomer/maleic anhydride addition product is mixed with the resin ingredients prior to the addition of carbonate filler.
Inventors
- 👤 Weldon N. Reed
- 👤 Thomas J. Galvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:34
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08L; C08L39/00; C08L39/04; C08L75/00; C08L75/04; C08L79/00; C08L79/04; C08L9/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
91 words
A resin blend useful in preparing blister resistent fully cured articles when heated at temperatures of 175-205° C. which comprises a polyethylenically unsaturated polyisocyanurate polymer resin, an ethylenically unsaturated monomer, a polyurethane thickener, 30-80 percent by weight of a powdered calcium carbonate filler and from 0.05-2.0 percent based upon the weight of the calcium carbonate in the blend of a polybutadiene telomer/maleic anhydride addition product formed by copolymerizing said telomer having a molecular weight in the range of 500-4000 with 5-50 parts by weight of maleic anhydride per 100 parts telomer.
Claim 2
Dependent Claim
91 words
A resin blend useful in preparing blister resistent fully cured articles when heated at temperatures of 175-205° C. which comprises a polyethylenically unsaturated polyisocyanurate polymer resin, an ethylenically unsaturated monomer, a polyurethane thickener, 30-80 percent by weight of a powdered calcium carbonate filler and from 0.05-2.0 percent based upon the weight of the calcium carbonate in the blend of a polybutadiene telomer/maleic anhydride addition product formed by copolymerizing said telomer having a molecular weight in the range of 500-4000 with 5-50 parts by weight of maleic anhydride per 100 parts telomer.
Claim 3
Dependent Claim
25 words
A composition of claim 1 which is formulated by mixing the polybutadiene/maleic anhydride adduct with the resin ingredients prior to incorporating calcium carbonate filler therewith.
Claim 4
Dependent Claim
44 words
A composition of claim 1 wherein said ethylenically unsaturated monomer is selected from the group consisting of styrene, vinyl toluene, divinylbenzene, the methyl, ethyl, n-butyl, 2-ethylhexyl or pentaerythitol esters of acrylic or methacrylic acid, triallyl isocyanurate, vinyl acetate, diallyl fumurate, vinyl ether and acrylonitrile.
Claim 5
Dependent Claim
12 words
A composition of claim 1 wherein said ethylenically unsaturated monomer is styrene.
Claim 6
Dependent Claim
18 words
A composition of claim 1 wherein said polyisocyanurate resin is a condensation product of hydroxypropylmethacrylate and toluene diisocyanate.
Claim 7
Dependent Claim
23 words
A composition of claim 1 where said polyethylenically unsaturated resin is a polyisocyanurate resin having a molecular weight in the range of 2,000-200,000.
Claim 8
Dependent Claim
25 words
A composition of claim 1 wherein said polyurethane is a reaction product of organic polyols having 2-6 hydroxyl groups and polyisocyanates having 2-5 isocyanate groups.
Claim 9
Dependent Claim
35 words
A composition of claim 7 wherein said polyols are reaction products of bisphenol A with alkylene oxides having 2-3 carbon atoms and said polyisocyanate is selected from polymethylene polyphenyl polyisocyanate, toluene diisocyanate and diphenylmethane diisocyanate.
Claim 10
Dependent Claim
88 words
A resin blend useful in preparing a composition of claim 1 by the addition thereto of polyisocyanate which comprises a polyethylenically unsaturated polyisocyanurate resin having a molecular weight in the range of 2,000-200,000, an ethylenically unsaturated monomer, an organic polyol free of ethylenic unsaturation, 30-80 percent by weight of powdered calcium carbonate filler and 0.05-2 percent by weight based upon the weight of said calcium carbonate of a polybutadiene telomer having a molecular weight of 500-4000/maleic anhydride addition product having 10-30 parts succinic anhydride per 100 parts telomer.
Claim 11
Dependent Claim
13 words
A composition of claim 9 further comprising 0.1-2% by weight unreacted maleic anhydride.
References Cited (Backward Citations)
US3426099A
Cited
US3907751A
Cited
SU608494A3
Cited
US3979547A
Cited
US4207222A
Cited
US4128537A
Cited
US4195146A
Cited
US4232133A
Cited
US4222929A
Cited
US4296020A
Cited
US4289682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-04 | 1986-04-05 | 1986-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-04 | 1990-04-05 | 1990-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-04 | 1994-04-05 | 1994-10-05 | $7700.00 | Window Closed / Lapsed |