Patent US4401771A successfully refreshed from Google Patents.
US4401771A
Expired / Lapsed
US
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Method for preparing polyester foam using cobalt/potassium promotors
Assignee: Uniroyal Chemical Co Inc
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Filing: 1982-07-19
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Granted: 1983-08-30
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Expires: 2002-07-19
Abstract
Abstract A foamable and simultaneously curable polyester composition is provided. The composition consists essentially of the following (all being in parts by weight): (a) 100 parts liquid unsaturated polyester resin, (b) 0.5 to 10 parts monosubstituted sulfonyl hydrazide having the formula RSO2NHNH2, wherein R is C1-C12 alkyl, C5-C6 cycloalkyl, C7-C10 aralkyl, phenyl, naphthyl, or phenyl substituted with halogen, C1-C12 alkyl or C1-C12 alkoxy, (c) 0.1 to 5.0 parts of a promoter, said promoter consisting essentially of a mixture of organic heavy metal salt and organic alkali metal salt, wherein the heavy metal/alkali metal molar ratio is from 10/1 to 1/10.
Inventors
- 👤 James Ahnemiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:08
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J9/104; C08J9/105; C08F; C08F299/00; C08F299/02; C08F299/04; C08F299/0442; C08F299/0464; C08J2367/00; C08J2367/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
142 words
A foamable and simultaneously curable polyester composition consisting essentially of, all parts being by weight: (a) 100 parts liquid unsaturated polyester resin, (b) 0.5 to 10 parts monosubstituted sulfonyl hydrazide having the formula RSO 2 NHNH 2 , wherein R is C 1 -C 12 alkyl, C 5 -C 6 cycloalkyl, C 7 -C 10 aralkyl, phenyl, naphthyl, or phenyl substituted with halogen, C 1 -C 12 alkyl or C 1 -C 12 alkoxy, (c) 0.1 to 5.0 parts of a promoter, said promoter consisting essentially of a mixture of organic heavy metal salt and organic alkali metal salt, wherein the heavy metal/alkali metal molar ratio is from 10/1 to 1/10, (d) 0 to 2 parts surfactant, (e) 0 to 250 parts of filler, and (f) 0.3 to 5 parts of a cross-linking initiating compound selected from organic peroxides and organic hydroperoxide.
Claim 2
Dependent Claim
142 words
A foamable and simultaneously curable polyester composition consisting essentially of, all parts being by weight: (a) 100 parts liquid unsaturated polyester resin, (b) 0.5 to 10 parts monosubstituted sulfonyl hydrazide having the formula RSO 2 NHNH 2 , wherein R is C 1 -C 12 alkyl, C 5 -C 6 cycloalkyl, C 7 -C 10 aralkyl, phenyl, naphthyl, or phenyl substituted with halogen, C 1 -C 12 alkyl or C 1 -C 12 alkoxy, (c) 0.1 to 5.0 parts of a promoter, said promoter consisting essentially of a mixture of organic heavy metal salt and organic alkali metal salt, wherein the heavy metal/alkali metal molar ratio is from 10/1 to 1/10, (d) 0 to 2 parts surfactant, (e) 0 to 250 parts of filler, and (f) 0.3 to 5 parts of a cross-linking initiating compound selected from organic peroxides and organic hydroperoxide.
Claim 3
Dependent Claim
28 words
The composition of claim 1 wherein the concentration of (b) is 0.5 to 1.5 parts by weight, of (d) is 0.5 to 1.5 and of (e) is 0.5-20.
Claim 4
Dependent Claim
19 words
The composition of claim 1 wherein in (c) the heavy metal is cobalt and the alkali metal is potassium.
Claim 5
Dependent Claim
12 words
The composition of claim 3 wherein the surfactant is a silicon-glycol polymer.
Claim 6
Dependent Claim
14 words
The composition of claim 3 wherein the chemical blowing agent is p-toluene sulfonyl hydrazide.
Claim 7
Dependent Claim
20 words
The composition of claim 3 wherein the molar ratio of heavy metal/alkali metal of (c) is from 5/1 to 1/2.
Claim 8
Independent Claim
76 words
A method for preparing a foamed and cured polyester resin consisting essentially of providing a composition as in any of claims 1 to 6 by: (A) preparing a blend of 10-90 percent by weight of the (a) with (b), (c), (d) and (e), (B) preparing a blend of correspondingly 90-10 percent of the (a) with and (f), (C) mixing the blends resulting from steps (A) and (B) and exposing the mixtures to foaming and curing conditions.
Claim 9
Independent Claim
51 words
A method for preparing a foamed and cured polyester resin consisting essentially of providing a composition as in any of claims 1 to 6 by: (A) preparing a mixture of (a), (b), (c), (d) and (e) (B) adding (e) to the mixture and exposing the mixture to foaming and curing conditions.
References Cited (Backward Citations)
US4322502A
Cited
US4327196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |