Patent US3488333A successfully refreshed from Google Patents.
US4080345A
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Catalyst mixture for use in trimerizing and/or polymerizing isocyanates and/or for the polyaddition of active hydrogen atom containing polyethers and polyisocyanates
Assignee: Metzeler Kautschuk GmbH
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Filing: 1976-03-03
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Granted: 1978-03-21
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Expires: 1996-03-03
Abstract
Abstract Catalyst mixture for use in trimerizing and/or polymerizing isocyanates and/or for the polyaddition of active hydrogen atom containing polyethers and polyisocyanates comprising an amine as conventionally used in polyurethane chemistry in combination with an alkali metal salt of an inorganic acid and the trimerization and/or polymerization and/or polyaddition reaction utilizing such catalyst mixture.
Inventors
- 👤 Franz Riemhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:32
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/22; C08G18/225; C08G18/161; C08G18/163; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6681; C08G18/6688; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7614; C08G18/7621; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G2115/00; C08G2115/02; Y; Y10; Y10S; Y10S521/00; Y10S521/904
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
111 words
In a process for the production of a cold-hardening polyurethane foam by polymerization of toluylene diisocyanate or by polyaddition to a polyisocyanate of a polyether containing a reactive hydrogen atom, in the presence of an amine catalyst, the improvement which comprises performing the said polymerization of polyaddition in the presence of a catalyst consisting essentially of the catalytic amine and an alkali-metal salt of an inorganic acid selected from the group consisting of alkali-metal sulfates, thiosulfates, nitrates, and halides, the amine being present in the reaction mixture in an amount between 0.001 and 10% by weight and the alkali-metal salt being present in an amount between 0.01 and 10% by weight.
Claim 2
Dependent Claim
111 words
In a process for the production of a cold-hardening polyurethane foam by polymerization of toluylene diisocyanate or by polyaddition to a polyisocyanate of a polyether containing a reactive hydrogen atom, in the presence of an amine catalyst, the improvement which comprises performing the said polymerization of polyaddition in the presence of a catalyst consisting essentially of the catalytic amine and an alkali-metal salt of an inorganic acid selected from the group consisting of alkali-metal sulfates, thiosulfates, nitrates, and halides, the amine being present in the reaction mixture in an amount between 0.001 and 10% by weight and the alkali-metal salt being present in an amount between 0.01 and 10% by weight.
Claim 3
Dependent Claim
22 words
A process according to claim 1 wherein said alkali metal salt of an inorganic acid is a lithium, sodium or potassium salt.
Claim 4
Dependent Claim
22 words
A process according to claim 1 wherein said alkali metal of an inorganic acid is lithium-, sodium- or potassium chloride or bromide.
Claim 5
Dependent Claim
25 words
A process according to claim 1 wherein said alkali metal salt of an inorganic acid is lithium-, sodium- or potassium sulfate or thiosulfate or thiosulfate.
Claim 6
Dependent Claim
21 words
A process according to claim 1 wherein said alkali metal salt of an inorganic acid is lithium-, sodium- or potassium nitrate.
Claim 7
Dependent Claim
32 words
A process according to claim 1 wherein said alkali metal salt of an inorganic acid is used in an amount of 0.01 to 5 wt % based on the total foam mixture.
Claim 8
Dependent Claim
32 words
A process according to claim 1 wherein said alkali metal salt of an inorganic acid is used in an amount of 0.1 to 5 wt % based on the total foam mixture.
Claim 9
Dependent Claim
24 words
A process according to claim 1 wherein said alkali metal salt of an inorganic acid is used in the form of its aqueous solution.
Claim 10
Dependent Claim
31 words
A process according to claim 1 wherein said alkali metal salt of an inorganic acid is used in the form of a paste of the solid salt in a suitable liquid.
Claim 11
Dependent Claim
125 words
In a process for the production of a cold-hardening polyurethane foam by polymerization of an isocyanate or by polyaddition to a polyisocyanate of a polyether containing a reactive hydrogen atom, in the presence of an amine catalyst, the improvement which comprises performing the said polymerization or polyaddition in the presence of a catalyst consisting essentially of the catalytic amine and an alkali-metal salt of an inorganic acid selected from the group consisting of alkali-metal sulfates, thiosulfates, nitrates and halides, the amine being present in the reaction mixture in an amount between 0.001 and 10% by weight based on 100% by weight of polyol and the alkali-metal salt being present in an amount between 0.01 and 10% by weight based on 100% by weight of polyol.
Claim 12
Dependent Claim
125 words
In a process for the production of a cold-hardening polyurethane foam by polymerization of an isocyanate or by polyaddition to a polyisocyanate of a polyether containing a reactive hydrogen atom, in the presence of an amine catalyst, the improvement which comprises performing the said polymerization or polyaddition in the presence of a catalyst consisting essentially of the catalytic amine and an alkali-metal salt of an inorganic acid selected from the group consisting of alkali-metal sulfates, thiosulfates, nitrates and halides, the amine being present in the reaction mixture in an amount between 0.001 and 10% by weight based on 100% by weight of polyol and the alkali-metal salt being present in an amount between 0.01 and 10% by weight based on 100% by weight of polyol.
Claim 13
Dependent Claim
117 words
A process for the production of a polyurethane foam as defined in claim 1 which comprises adding toluylene diisocyanate in an amount equivalent to 60.3 parts by weight to a mixture of 100 parts by weight of a polyether condensation product of ethylene oxide, propylene oxide and trimethylolpropane, 4 parts by weight of water, 5 parts by weight of glycerol, 1 part by weight of triethanolamine, 1 part by weight of a 33% by weight solution of 1,4-diazabicyclo[2.2.2]octane in 2,2'-dihydroxydipropyl ether, and between 0.01 and 10% by weight of an alkali-metal salt of an organic acid selected from the group consisting of alkali-metal sulfates, thiosulfate, nitrates and halides, and allowing the mixture to cold-harden to a foam.
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) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |