US3992479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated polyester with thermoplastic grafts using calcium hydroxide as gelling agent
Assignee: Owens Corning Fiberglas Technology Inc
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Filing: 1974-09-03
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Granted: 1976-11-16
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Expires: 1994-09-03
Abstract
Abstract Low pressure molding compounds comprising a thermosetting resin and a thermoplastic resin are gelled with calcium hydroxide within a specific concentration range to produce compounds moldable at low pressures.
Inventors
- 👤 Michael G. Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:25
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08L; C08L67/00; C08L67/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
89 words
A moldable composition comprising: a. an unsaturated, crosslinkable thermosetting resin; b. an ethylenically unsaturated first monomer; c. a thermoplastic resin soluble in said first monomer, said thermoplastic resin comprising the reaction product of a second monomer with a mixture comprising a styrene-butadiene copolymer and a polybutadiene polymer, said second monomer being reacted with both said styrene-butadiene copolymer and said polybutadiene polymer; and, d. a gelling agent consisting essentially of calcium hydroxide in an amount sufficient to gell said composition to a viscosity at which said composition can be molded.
Claim 2
Dependent Claim
89 words
A moldable composition comprising: a. an unsaturated, crosslinkable thermosetting resin; b. an ethylenically unsaturated first monomer; c. a thermoplastic resin soluble in said first monomer, said thermoplastic resin comprising the reaction product of a second monomer with a mixture comprising a styrene-butadiene copolymer and a polybutadiene polymer, said second monomer being reacted with both said styrene-butadiene copolymer and said polybutadiene polymer; and, d. a gelling agent consisting essentially of calcium hydroxide in an amount sufficient to gell said composition to a viscosity at which said composition can be molded.
Claim 3
Dependent Claim
13 words
The composition of claim 1 in which said mixture comprises an acid-functional substituent.
Claim 4
Dependent Claim
35 words
The composition of claim 1 in which said gelling agent is present in said composition in an amount within the range of from about 0.7 to about 1.2 parts per hundred parts of total resin.
Claim 5
Dependent Claim
23 words
The composition of claim 1 in which said viscosity is within the range of from about 4 million to about 12 million centipoises.
Claim 6
Dependent Claim
31 words
The composition of claim 1 in which said thermosetting resin is a polyester, said first monomer is styrene, said second monomer is styrene, and said styrene-butadiene copolymer is a block copolymer.
Claim 7
Dependent Claim
36 words
The composition of claim 1 in which said thermoplastic resin contains from about 70 to about 97 weight percent styrene and from about 3 to about 30 weight percent of styrene-butadiene copolymer and said polybutadiene polymer.
Claim 8
Dependent Claim
32 words
The composition of claim 1 in which said thermoplastic resin has an acid number up to about 3 and a molecular weight within the range of from about 80,000 to about 350,000.
Claim 9
Dependent Claim
24 words
The composition of claim 1 in which said thermoplastic resin has an acid number of about 0.3 and a molecular weight of about 240,000.
Claim 10
Dependent Claim
16 words
The composition of claim 2 in which said acid-functional substituent is acrylic acid or methacrylic acid.
Claim 11
Dependent Claim
27 words
The composition of claim 1 in which said mixture comprises styrene, a styrene-butadiene block copolymer, a polybutadiene polymer and acrylic acid and said composition comprises glass fibers.
Claim 12
Dependent Claim
83 words
A molded composition comprising: a. a crosslinked continuous phase comprising a thermoset resin, said resin having been gelled by contact with calcium hydroxide and an ethylenically unsaturated first monomer; and, b. a disperse phase within said continuous phase, said disperse phase comprising a thermoplastic resin soluble in said monomer comprising the reaction product of a monomer with a mixture comprising an acid-functional substituent, a styrene-butadiene copolymer and a polybutadiene polymer, said monomer being reacted with both said styrene-butadiene copolymer and said polybutadiene polymer.
Claim 13
Dependent Claim
83 words
A molded composition comprising: a. a crosslinked continuous phase comprising a thermoset resin, said resin having been gelled by contact with calcium hydroxide and an ethylenically unsaturated first monomer; and, b. a disperse phase within said continuous phase, said disperse phase comprising a thermoplastic resin soluble in said monomer comprising the reaction product of a monomer with a mixture comprising an acid-functional substituent, a styrene-butadiene copolymer and a polybutadiene polymer, said monomer being reacted with both said styrene-butadiene copolymer and said polybutadiene polymer.
Claim 14
Dependent Claim
23 words
The composition of claim 11 in which said thermoset resin is the reaction product of an unsaturated polyester and an ethylenically unsaturated monomer.
Claim 15
Dependent Claim
35 words
The composition of claim 11 in which said thermoplastic is present in an amount within the range of from about 20 to about 45 parts by weight per 100 parts by weight of total resin.
Claim 16
Dependent Claim
13 words
The composition of claim 11 in which said molded composition comprises glass fibers.
Claim 17
Dependent Claim
36 words
The composition of claim 14 in which said glass fibers are present in an amount within the range of from about 10 to about 35 parts by weight per 100 parts by weight of said resin.
Claim 18
Dependent Claim
36 words
The composition of claim 11 in which said calcium hydroxide is employed in an amount within the range of from about 0.7 to about 1.2 parts by weight per 100 parts by weight of said resins.
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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) | 1979-11-16 | 1980-05-17 | 1980-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-16 | 1984-05-17 | 1984-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-16 | 1988-05-17 | 1988-11-16 | $7700.00 | Window Closed / Lapsed |