US3969311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber reinforced polyester resin having a low surface profile
Assignee: Motors Liquidation Co
•
Filing: 1975-04-03
•
Granted: 1976-07-13
•
Expires: 1995-04-03
Abstract
Abstract In accordance with a preferred embodiment of this invention, a fiber reinforced polyester article having a low surface profile is produced from a material which may be used either as a bulk molding or as a sheet molding compound. Preferably, this composition is produced from a formulation comprising about equal proportions of (1) an unsaturated polyester condensation product dissolved in (2) a copolymerizable reactive diluent solution of from proportionally 11/2 to 2 parts by weight of tertiary butyl styrene per each part of styrene. This formulation will of course also contain a filler such as a particulate calcium carbonate and reinforcing glass fibers. It is the specific combination of styrene and tertiary butyl styrene which promotes the low profile surface in the final molded article.
Inventors
- 👤 Hideo Kubota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:26
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/04; C08F299/0478; C08K; C08K13/00; C08K13/04; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08K3/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
143 words
A fiber reinforced molded article, having a low profile surface, which article is formed by heating under pressure a uniformly dispersed blend consisting essentially of: filling, reinforcing, and process aiding ingredients comprising by weight: a. from about 90 to about 130 parts of a fibrous reinforcing filler; b. from about 145 to about 250 parts of a mineral filler; and matrix forming ingredients consisting essentially of by weight: c. about 50 parts of an unsaturated polyester formed from a linear aliphatic alpha, beta-unsaturated dicarboxyliic acid and/or anhydride having from 4 to 6 carbon atoms and a polyhydric alcohol, said polyester having an acid number of from 5 to 40; and d. 40 to 60 parts of a monomeric copolymerizable diluent solution comprising proportionally about 1 part by weight of styrene and from about 1 to 2 parts by weight of tertiary butyl styrene.
Claim 2
Dependent Claim
143 words
A fiber reinforced molded article, having a low profile surface, which article is formed by heating under pressure a uniformly dispersed blend consisting essentially of: filling, reinforcing, and process aiding ingredients comprising by weight: a. from about 90 to about 130 parts of a fibrous reinforcing filler; b. from about 145 to about 250 parts of a mineral filler; and matrix forming ingredients consisting essentially of by weight: c. about 50 parts of an unsaturated polyester formed from a linear aliphatic alpha, beta-unsaturated dicarboxyliic acid and/or anhydride having from 4 to 6 carbon atoms and a polyhydric alcohol, said polyester having an acid number of from 5 to 40; and d. 40 to 60 parts of a monomeric copolymerizable diluent solution comprising proportionally about 1 part by weight of styrene and from about 1 to 2 parts by weight of tertiary butyl styrene.
Claim 3
Dependent Claim
143 words
A fiber reinforced molded article, having a low profile surface, which article is formed by heating under pressure a uniformly dispersed blend consisting essentially of: filling, reinforcing, and process aiding ingredients comprising by weight: a. from about 90 to about 130 parts of a fibrous reinforcing filler; b. from about 145 to about 250 parts of a mineral filler; and matrix forming ingredients consisting essentially of by weight: c. about 50 parts of an unsaturated polyester formed from a linear aliphatic alpha, beta-unsaturated dicarboxylic acid and/or anhydride having from 4 to 6 carbon atoms and a polyhydric alcohol, said polyester having an acid number of from 5 to 40; and d. 40 to 60 parts of a monomeric copolymerizable diluent solution comprising proportionally about 1 part by weight of styrene and from about 11/2 to 2 parts by weight of tertiary butyl styrene.
Claim 4
Dependent Claim
143 words
A fiber reinforced molded article, having a low profile surface, which article is formed by heating under pressure a uniformly dispersed blend consisting essentially of: filling, reinforcing, and process aiding ingredients comprising by weight: a. from about 90 to about 130 parts of a fibrous reinforcing filler; b. from about 145 to about 250 parts of a mineral filler; and matrix forming ingredients consisting essentially of by weight: c. about 50 parts of an unsaturated polyester formed from a linear aliphatic alpha, beta-unsaturated dicarboxylic acid and/or anhydride having from 4 to 6 carbon atoms and a polyhydric alcohol, said polyester having an acid number of from 5 to 40; and d. 40 to 60 parts of a monomeric copolymerizable diluent solution comprising proportionally about 1 part by weight of styrene and from about 11/2 to 2 parts by weight of tertiary butyl styrene.
Claim 5
Dependent Claim
137 words
A low profile fiber reinforced molded article formed by heating under pressure a mixture consisting essentially of by weight: A. about 50 parts of an unsaturated polyester formed from a linear aliphatic alpha, beta-unsaturated dicarboxylic acid and/or anhydride having from 4 to 6 carbon atoms and a polyhydric alcohol, said polyester having an acid number of from 5 to 40; and B. about 40 to about 60 parts of a monomeric copolymerizable diluent solution comprising proportionally about 1 part by weight of styrene and from about 1 to 2 parts by weight of tertiary butyl styrene; and C. about 90 to about 130 parts of a fibrous reinforcing filler; and D. about 145 to about 250 parts of a mineral filler, said polyester, said fiber filler and said mineral filler being initially uniformly dispersed in said diluent.
Claim 6
Dependent Claim
137 words
A low profile fiber reinforced molded article formed by heating under pressure a mixture consisting essentially of by weight: A. about 50 parts of an unsaturated polyester formed from a linear aliphatic alpha, beta-unsaturated dicarboxylic acid and/or anhydride having from 4 to 6 carbon atoms and a polyhydric alcohol, said polyester having an acid number of from 5 to 40; and B. about 40 to about 60 parts of a monomeric copolymerizable diluent solution comprising proportionally about 1 part by weight of styrene and from about 1 to 2 parts by weight of tertiary butyl styrene; and C. about 90 to about 130 parts of a fibrous reinforcing filler; and D. about 145 to about 250 parts of a mineral filler, said polyester, said fiber filler and said mineral filler being initially uniformly dispersed in said diluent.
Claim 7
Dependent Claim
138 words
A low profile fiber reinforced molded article formed by heating under pressure a mixture consisting essentially of by weight: A. about 50 parts of an unsaturated polyester formed from a linear aliphatic alpha, beta-unsaturated dicarboxylic acid and/or anhydride having from 4 to 6 carbon atoms and a polyhydric alcohol, said polyester having an acid number of from 5 to 40; and B. about 40 to about 60 parts of a monomeric copolymerizable diluent solution comprising proportionally about 1 part by weight of styrene and from about 1 1/2 to 2 parts by weight of tertiary butyl styrene; and C. about 90 to about 130 parts of a fibrous reinforcing filler; and D. about 145 to about 250 parts of a mineral filler, said polyester, said fiber filler and said mineral filler being initially uniformly dispersed in said diluent.
Claim 8
Dependent Claim
138 words
A low profile fiber reinforced molded article formed by heating under pressure a mixture consisting essentially of by weight: A. about 50 parts of an unsaturated polyester formed from a linear aliphatic alpha, beta-unsaturated dicarboxylic acid and/or anhydride having from 4 to 6 carbon atoms and a polyhydric alcohol, said polyester having an acid number of from 5 to 40; and B. about 40 to about 60 parts of a monomeric copolymerizable diluent solution comprising proportionally about 1 part by weight of styrene and from about 1 1/2 to 2 parts by weight of tertiary butyl styrene; and C. about 90 to about 130 parts of a fibrous reinforcing filler; and D. about 145 to about 250 parts of a mineral filler, said polyester, said fiber filler and said mineral filler being initially uniformly dispersed in said diluent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |