Patent US4088710A successfully refreshed from Google Patents.
US4088710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reducing gel time of polyester thermoset resins and product thereof
Assignee: Stauffer Chemical Co
•
Filing: 1977-03-29
•
Granted: 1978-05-09
•
Expires: 1997-03-29
Abstract
Abstract The gel time of unsaturated polyester thermosetting resins containing polymerizable vinyl monomers, such a styrene, and a vinylphosphonate flame retardant, such as the bis(hydrocarbyl)vinylphosphonates, which normally retards the gel time of such resins, is reduced by the addition of an effective amount for gel time reduction of maleic anhydride.
Inventors
- 👤 Anthony J. Spak
- 👤 Arthur J. Yu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:33
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1535; C08K5/1539; C08K5/09; C08K5/49; C08K5/51; C08K5/53
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
37 words
In a thermosetting resin composition comprising an unsaturated polyester thermosetting resin, a polymerizable vinyl monomer, a vinylphosphonate flame retardant, and a polyester catalyst wherein the improvement comprises an effective amount of maleic anhydride for gel time reduction.
Claim 2
Dependent Claim
37 words
In a thermosetting resin composition comprising an unsaturated polyester thermosetting resin, a polymerizable vinyl monomer, a vinylphosphonate flame retardant, and a polyester catalyst wherein the improvement comprises an effective amount of maleic anhydride for gel time reduction.
Claim 3
Dependent Claim
40 words
A composition as claimed in claim 1 wherein the polymerizable vinyl monomer is selected from the group consisting of styrene, vinyl toluene, diallyl phthalate, triallyl cyanurate, triallyl citrate, diallyl maleate, diallyl fumarate, methyl methacrylate, acrylonitrile, vinyl pyridine and ethyl acrylate.
Claim 4
Dependent Claim
14 words
A composition as claimed in claim 1 wherein the polymerizable vinyl monomer is styrene.
Claim 5
Dependent Claim
13 words
A composition as claimed in claim 1 wherein the vinylphosphonate is a bis(hydrocarbyl)vinylphosphonate.
Claim 6
Dependent Claim
13 words
A composition as claimed in claim 1 wherein the vinylphosphonate is bis(beta chloroethyl)vinylphosphonate.
Claim 7
Dependent Claim
17 words
A composition as claimed in claim 1 wherein the vinylphosphonate is a condensation product of a bis(hydrocarbyl)vinylphosphonate.
Claim 8
Dependent Claim
34 words
A composition as claimed in claim 1 wherein the amount of maleic anhydride is from about 5% to about 45%, by weight, of the content of maleic anhydride, vinyl monomer and vinylphosphonate flame retardant.
Claim 9
Dependent Claim
20 words
A composition as claimed in claim 7 wherein the polymerizable vinyl monomer is styrene and the vinylphosphonate is bis(beta chloroethyl)vinylphosphonate.
Claim 10
Dependent Claim
23 words
A composition consisting essentially of a vinylphosphonate flame retardant and maleic anhydride adapted to be used in forming the composition of claim 1.
Claim 11
Dependent Claim
23 words
A composition as claimed in claim 9 wherein the weight ratio of vinylphosphonate to maleic anhydride ranges from about 1:1 to about 10:1.
Claim 12
Dependent Claim
18 words
A composition as claimed in claim 10 wherein the weight ratio ranges from about 1:1 to about 4:1.
Claim 13
Dependent Claim
13 words
A composition as claimed in claim 9 wherein the vinylphosphonate is bis(beta chloroethyl)vinylphosphonate.
Claim 14
Dependent Claim
53 words
In a process for improving the gel time of a thermosetting resin composition which comprises an unsaturated polyester thermosetting resin, a polymerizable vinyl monomer, a vinylphosphonate flame retardant, and a polyester catalyst, the improvement in said process comprising incorporating in the polyester composition an effective amount of maleic anhydride for gel time reduction.
Claim 15
Dependent Claim
53 words
In a process for improving the gel time of a thermosetting resin composition which comprises an unsaturated polyester thermosetting resin, a polymerizable vinyl monomer, a vinylphosphonate flame retardant, and a polyester catalyst, the improvement in said process comprising incorporating in the polyester composition an effective amount of maleic anhydride for gel time reduction.
Claim 16
Dependent Claim
40 words
A process as claimed in claim 13 wherein the polymerizable vinyl monomer is selected from the group consisting of styrene, vinyl toluene, diallyl phthalate, triallyl cyanurate, triallyl citrate, diallyl maleate, diallyl fumarate, methyl methacrylate, acrylonitrile, vinyl pyridine and ethyl acrylate.
Claim 17
Dependent Claim
14 words
A composition as claimed in claim 13 wherein the polymerizable vinyl monomer is styrene.
Claim 18
Dependent Claim
13 words
A composition as claimed in claim 13 wherein the vinylphosphonate is a bis(hydrocarbyl)vinylphosphonate.
Claim 19
Dependent Claim
13 words
A process as claimed in claim 13 wherein the vinylphosphonate is bis(beta chloroethyl)vinylphosphonate.
Claim 20
Dependent Claim
17 words
A process as claimed in claim 13 wherein the vinylphosphonate is a condensation product of a bis(hydrocarbyl)vinylphosphonate.
Claim 21
Dependent Claim
37 words
A process as claimed in claim 13 wherein the amount of maleic anhydride which is incorporated is from about 5% to about 45%, by weight of the content of maleic anhydride, vinyl monomer and vinylphosphonate flame retardant.
Claim 22
Dependent Claim
20 words
A composition as claimed in claim 19 wherein the polymerizable vinyl copolymer is styrene and the vinylphosphonate is bis(beta chloroethyl)vinylphosphonate.
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) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |