US4200699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst composition for rigid polyurethane foams
Assignee: Air Products and Chemicals Inc
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Filing: 1978-10-12
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Granted: 1980-04-29
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Expires: 1998-10-12
Abstract
Abstract The rate of the reaction between a polyol and a polyfunctional isocyanate to form a rigid polyurethane foam can be controlled within a wide range, using as the catalyst for said reaction a mixture comprising catalytically effective amounts of an antimony carboxylate, a potassium carboxylate and a zinc carboxylate. The mixture can be used alone or in combination with tertiary amines or tin compounds, both of which are conventionally employed as catalysts for the polyol-isocyanate reaction.
Inventors
- 👤 Kenneth Treadwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:44
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G2110/00; C08G2110/0025
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
74 words
A gel catalyst composition for preparing rigid polyurethane foams, said catalyst composition consisting essentially of catalytically effective amounts of an antimony carboxylate, a potassium carboxylate and a zinc carboxylate wherein the hydrocarbyl portions of the carboxylates contain from 1 to 20 carbon atoms and wherein each of said antimony and potassium carboxylates constitutes from 10 to 40% by weight of said composition and the zinc carboxylate constitutes the remaining 20 to 80% by weight.
Claim 2
Dependent Claim
74 words
A gel catalyst composition for preparing rigid polyurethane foams, said catalyst composition consisting essentially of catalytically effective amounts of an antimony carboxylate, a potassium carboxylate and a zinc carboxylate wherein the hydrocarbyl portions of the carboxylates contain from 1 to 20 carbon atoms and wherein each of said antimony and potassium carboxylates constitutes from 10 to 40% by weight of said composition and the zinc carboxylate constitutes the remaining 20 to 80% by weight.
Claim 3
Dependent Claim
59 words
A catalyst composition according to claim 1 wherein said antimony, potassium, and zinc carboxylates exhibit the general formulae Sb(OOCR 1 ) 3 , KOOCR 2 , and Zn(OOCR 3 ) 2 , respectively, and wherein R 1 , R 2 and R 3 are individually selected from the group consisting of hydrocarbyl containing from 1 to 20 carbon atoms.
Claim 4
Dependent Claim
19 words
A gel catalyst composition according to claim 2 wherein R 1 , R 2 and R 3 are alkyl.
Claim 5
Dependent Claim
19 words
A gel catalyst composition according to claim 3 wherein R 1 , R 2 and R 3 are ##STR1##
Claim 6
Dependent Claim
35 words
A gel catalyst composition according to claim 1 wherein said composition contains a solvent for said antimony, potassium and zinc carboxylates, said solvent being miscible with the polyols employed to prepare said rigid polyurethane foams.
Claim 7
Dependent Claim
16 words
A gel catalyst composition according to claim 5 wherein said solvent is a liquid polypropylene glycol.
Claim 8
Dependent Claim
110 words
In an improved method for preparing rigid polyurethane foams by reacting a polyol containing at least three active hydrogen atoms with a polyfunctional isocyanate in the presence of a gel catalyst, a blowing agent and a silicon-containing surfactant, the improvement comprising employing as the gel catalyst a composition consisting essentially of catalytically effective amounts of an antimony carboxylate, a potassium carboxylate and a zinc carboxylate wherein the hydrocarbyl portions of the carboxylates contain from 1 to 20 carbon atoms and wherein each of said antimony and potassium carboxylates constitutes from 10 to 40% by weight of said composition and the zinc carboxylate constitutes the remaining 20 to 80% by weight.
Claim 9
Dependent Claim
110 words
In an improved method for preparing rigid polyurethane foams by reacting a polyol containing at least three active hydrogen atoms with a polyfunctional isocyanate in the presence of a gel catalyst, a blowing agent and a silicon-containing surfactant, the improvement comprising employing as the gel catalyst a composition consisting essentially of catalytically effective amounts of an antimony carboxylate, a potassium carboxylate and a zinc carboxylate wherein the hydrocarbyl portions of the carboxylates contain from 1 to 20 carbon atoms and wherein each of said antimony and potassium carboxylates constitutes from 10 to 40% by weight of said composition and the zinc carboxylate constitutes the remaining 20 to 80% by weight.
Claim 10
Dependent Claim
59 words
An improved method according to claim 7 wherein said antimony, potassium, and zinc carboxylates exhibit the general formulae Sb(OOCR 1 ) 3 , KOOCR 2 , and Zn(OOCR 3 ) 2 , respectively, and wherein R 1 , R 2 and R 3 are individually selected from the group consisting of hydrocarbyl containing from 1 to 20 carbon atoms.
Claim 11
Dependent Claim
18 words
An improved method according to claim 8 wherein R 1 , R 2 and R 3 are alkyl.
Claim 12
Dependent Claim
18 words
An improved method according to claim 7 wherein R 1 , R 2 and R 3 are ##STR2##
Claim 13
Dependent Claim
27 words
An improved method according to claim 7 wherein said composition contains a solvent for said antimony, potassium, and zinc carboxylates, said solvent being miscible with said polyol.
Claim 14
Dependent Claim
15 words
An improved method according to claim 11 wherein said solvent is a liquid polypropylene glycol.
Claim 15
Dependent Claim
29 words
An improved method according to claim 7 wherein said composition is present in a mixture with a catalytically effective amount of a conventional gel catalyst for rigid polyurethane foams.
Claim 16
Dependent Claim
27 words
An improved method according to claim 13 wherein said conventional gel catalyst is selected from the group consisting of tertiary amines, inorganic tin compounds and organotin compounds.
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) | 1983-04-29 | 1983-10-29 | 1984-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-29 | 1987-10-29 | 1988-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-29 | 1991-10-29 | 1992-04-29 | $7700.00 | Window Closed / Lapsed |