US4216294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsaturated polyester resin foams and methods of preparation
Assignee: Argus Chemical Corp
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Filing: 1978-05-30
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Granted: 1980-08-05
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Expires: 1998-05-30
Abstract
Abstract Unsaturated polyester resin foams or cellular structures of varying low densities are prepared quickly at ambient temperatures from an admixture which comprises a liquid unsaturated curable polyester resin, an organic isocyanate compound, a suitable surfactant, an accelerator and a particular combination of peroxide curing agents, which also serves to initiate the release of gases that permit expansion of the resin in a controlled manner to obtain a foamed structure.
Inventors
- 👤 Reidar Halle
- 👤 Ronald L. Pastorino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:00
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/68; C08G2110/00; C08G2110/0041; C08G2110/0058; C08G2110/0066; C08J2367/00; C08J2367/06; Y; Y10; Y10S; Y10S264/00; Y10S264/05
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
103 words
A liquid unsaturated polyester resin composition adapted to expand and cure into a foam product having a density below about 25 pounds per cubic foot, comprising: (a) a promoted liquid unsaturated polyester resin adapted to be crosslinked by a curing and foaming agent; (b) a curing and foaming agent activated at ambient temperatures to effect crosslinking and curing of said polyester resin, said agent consisting essentially of similar quantities of hydrogen peroxide, an organic peroxide and an organic isocyanate present in an amount in the range of about 5% to 18% of the weight of polyester resin; and (c) a silicone-oxyalkylene block polymer.
Claim 2
Dependent Claim
103 words
A liquid unsaturated polyester resin composition adapted to expand and cure into a foam product having a density below about 25 pounds per cubic foot, comprising: (a) a promoted liquid unsaturated polyester resin adapted to be crosslinked by a curing and foaming agent; (b) a curing and foaming agent activated at ambient temperatures to effect crosslinking and curing of said polyester resin, said agent consisting essentially of similar quantities of hydrogen peroxide, an organic peroxide and an organic isocyanate present in an amount in the range of about 5% to 18% of the weight of polyester resin; and (c) a silicone-oxyalkylene block polymer.
Claim 3
Dependent Claim
22 words
A liquid unsaturated polyester resin composition in accordance with claim 1 wherein said polyester resin is in solution with a vinyl monomer.
Claim 4
Dependent Claim
20 words
A liquid unsaturated polyester resin composition in accordance with claim 1 wherein the organic peroxide is methyl ethyl ketone peroxide.
Claim 5
Dependent Claim
25 words
A liquid unsaturated polyester resin composition in accordance with claim 1 wherein said peroxide-curing and foaming agent is about 1.0-3.0% by weight of said composition.
Claim 6
Dependent Claim
29 words
A liquid unsaturated polyester resin composition in accordance with claim 4 wherein said hydrogen peroxide and organic peroxide are in approximately equal parts by weight relative to each other.
Claim 7
Dependent Claim
28 words
A liquid unsaturated polyester resin composition in accordance with claim 4 wherein said organic peroxide and hydrogen peroxide are in a weight ratio of about 2:1 to 1:2.
Claim 8
Dependent Claim
24 words
A liquid unsaturated polyester resin composition in accordance with claim 1 wherein said silicone-oxyalkylene block polymer is about 0.5-1.5% by weight of said composition.
Claim 9
Dependent Claim
24 words
A liquid unsaturated polyester resin composition in accordance with claim 1 wherein said organic isocyanate is about 5-15% by weight of said polyester resin.
Claim 10
Dependent Claim
24 words
A liquid unsaturated polyester resin composition in accordance with claim 8 wherein said organic isocyanate is about 8-12% by weight of said polyester resin.
Claim 11
Independent Claim
104 words
A method for making a foam product having a density below about 25 pounds per cubic foot comprising mixing together at ambient temperature; (a) a promoted unsaturated polyester resin adapted to be crosslinked by a curing and foaming agent; (b) a curing and foaming agent activated at ambient temperatures consisting essentially of similar quantities of hydrogen peroxide, an organic peroxide and an organic isocyanate present in an amount in the range of about 5% to 18% of the weight of said polyester resin; and (c) a silicone-oxyalkylene block polymer; allowing said mixture to be expanded, crosslinked and cured by said curing and foaming agent.
Claim 12
Independent Claim
104 words
A method for making a foam product having a density below about 25 pounds per cubic foot comprising mixing together at ambient temperature; (a) a promoted unsaturated polyester resin adapted to be crosslinked by a curing and foaming agent; (b) a curing and foaming agent activated at ambient temperatures consisting essentially of similar quantities of hydrogen peroxide, an organic peroxide and an organic isocyanate present in an amount in the range of about 5% to 18% of the weight of said polyester resin; and (c) a silicone-oxyalkylene block polymer; allowing said mixture to be expanded, crosslinked and cured by said curing and foaming agent.
Claim 13
Dependent Claim
23 words
A method for making a foam product in accordance with claim 10 wherein said polyester resin is in solution with a vinyl monomer.
Claim 14
Dependent Claim
21 words
A method for making a foam product in accordance with claim 10 wherein the organic peroxide is methyl ether ketone peroxide.
Claim 15
Dependent Claim
24 words
A method for making a foam product in accordance with claim 10 wherein said peroxide-curing agent is about 1.0-3.0% by weight of said composition.
Claim 16
Dependent Claim
30 words
A method for making a foam product in accordance with claim 13 wherein said hydrogen peroxide and organic peroxide are in approximately equal parts by weight relative to each other.
Claim 17
Dependent Claim
29 words
A method for making a foam product in accordance with claim 13 wherein said organic peroxide and hydrogen peroxide are in a weight ratio of about 2:1 to 1:2.
Claim 18
Dependent Claim
25 words
A method for making a foam product in accordance with claim 10 wherein said silicone-oxyalkylene block polymer is about 0.5-1.5% by weight of said composition.
Claim 19
Dependent Claim
25 words
A method for making a foam product in accordance with claim 10 wherein said organic isocyanate is about 5-15% by weight of said polyester resin.
Claim 20
Dependent Claim
30 words
A method for making a foam product in accordance with claim 17 wherein said organic isocyanate is present in an amount of about 8-12% by weight of said polyester resin.
References Cited (Backward Citations)
US2529512A
Cited
US2634244A
Cited
US2740743A
Cited
US3173897A
Cited
US3591532A
Cited
US3823099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-05 | 1984-02-04 | 1984-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-05 | 1988-02-04 | 1988-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-05 | 1992-02-04 | 1992-08-05 | $7700.00 | Window Closed / Lapsed |