US4101468A
Expired / Lapsed
US
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Process for cold-hardening polyurethane foams using sulfonamide emulsifiers
Assignee: Bayer AG
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Filing: 1977-02-10
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Granted: 1978-07-18
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Expires: 1997-02-10
Abstract
Abstract The invention relates to a process for preparing cold-hardening foams containing urethane groups using as an emulsifier, sulphonamide compounds of the formula: ##STR1## wherein R represents an alkyl, chloroalkyl, cycloalkyl radical having from 8 to 30 carbon atoms, or an alkaryl radical having from 10 to 30 carbon atoms, R 1 and R 2 , which may be the same or different, each represent a hydrogen atom, a chloromethyl, methyl, ethyl or phenyl radical, m is an integer of from 0 to 50, R 3 represents a hydrogen atom, an alkyl, aralkyl, alkaryl, aryl radical or a --(CHR 1 -CHR 2 -O-) m R 4 - group and R 4 represents a hydrogen atom, an alkyl, aralkyl, acyl, carbamoyl or cyanalkyl radical having from 1 to 20 carbon atoms. The use of these additions results in an increase in compression hardness without detrimental effects on other foam properties.
Inventors
- 👤 Hermann Perrey
- 👤 Hans-Joachim Meiners
- 👤 Jurgen Ick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:01
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J9/0014; C08J9/0033; C08K; C08K5/00; C08K5/36; C08K5/43; C08L; C08L71/00; C08L71/02; C08L75/00; C08L75/04; C08L75/08; C08J2375/00; C08J2375/04; C08J2375/08; C08J2471/00; Y; Y10; Y10S; Y10S521/00; Y10S521/904
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
164 words
In a process for the production of cold-hardening foams containing urethane groups by foaming a mixture of polyethers containing at least two hydroxyl groups and having a molecular weight of from about 750 to 100,000, polyisocyanates, water and/or organic blowing agents, emulsifiers and catalysts the improvement wherein, said emulsifier comprises sulphonamide compounds corresponding to the following general formula: ##STR4## wherein R represents an alkyl, chloroalkyl, cycloalkyl radical having from 8 to 30 carbon atoms, or an alkaryl radical having from 10 to 30 carbon atoms, R 1 and R 2 , which may be the same or different, each represent a hydrogen atom, a chloromethyl, methyl, ethyl or phenyl radical, m is an integer of from 0 to 50, R 3 represents a hydrogen atom, an alkyl, aralkyl, alkaryl, aryl radical or a --(CHR 1 --CHR 2 --O--) m R 4 -group and R 4 represents a hydrogen atom, an alkyl, aralkyl, acyl, carbamoyl or cyanoalkyl radical having from 1 to 30 carbon atoms.
Claim 2
Dependent Claim
164 words
In a process for the production of cold-hardening foams containing urethane groups by foaming a mixture of polyethers containing at least two hydroxyl groups and having a molecular weight of from about 750 to 100,000, polyisocyanates, water and/or organic blowing agents, emulsifiers and catalysts the improvement wherein, said emulsifier comprises sulphonamide compounds corresponding to the following general formula: ##STR4## wherein R represents an alkyl, chloroalkyl, cycloalkyl radical having from 8 to 30 carbon atoms, or an alkaryl radical having from 10 to 30 carbon atoms, R 1 and R 2 , which may be the same or different, each represent a hydrogen atom, a chloromethyl, methyl, ethyl or phenyl radical, m is an integer of from 0 to 50, R 3 represents a hydrogen atom, an alkyl, aralkyl, alkaryl, aryl radical or a --(CHR 1 --CHR 2 --O--) m R 4 -group and R 4 represents a hydrogen atom, an alkyl, aralkyl, acyl, carbamoyl or cyanoalkyl radical having from 1 to 30 carbon atoms.
Claim 3
Dependent Claim
66 words
The process of claim 1 wherein R 3 is an alkyl radical containing from 1 to 8 carbon atoms; an aralkyl or alkaryl containing from 7 to 30 carbon atoms; or an aryl radical containing from 6 to 14 carbon atoms and R 4 is an alkyl radical containing from 1 to 8 carbon atoms or an aralkyl radical containing from 7 to 30 carbon atoms.
Claim 4
Dependent Claim
114 words
The process of claim 1 wherein the sulphonamide compounds used are those wherein R represents an n-alkyl or chloroalkyl radical having from 10 to 20 carbon atoms or a C 8 -C 18 -n-alkyl phenyl radical, R 1 and R 2 represent a hydrogen atom or a methyl radical, m is an integer of from 0 to 20, R 3 represents a hydrogen atom or --CHR 1 --CHR 2 --O) m R 4 wherein R 1 , R 2 , m and R 4 are as defined in this claim and R 4 represents a hydrogen atom or where m = 1 to 20, represents an acetyl, N-methyl, cyclohexyl, phenyl, carbamoyl or β-cyanoethyl radical.
Claim 5
Dependent Claim
25 words
The process of claim 1 wherein R is a C 12 -C 18 -alkyl mixture, a C 10 -C 13 -alkyl mixture or dodecyl phenyl.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein R 4 is hydrogen, --CO-CH 3 or -CH 2 -CH 2 -CN.
Claim 7
Dependent Claim
24 words
The process of claim 1 wherein said sulphonamide compounds are used in quantities of from 0.01 to 10% by weight based on the polyethers.
Claim 8
Dependent Claim
24 words
The process of claim 1 wherein said sulphonamide compounds are used in quantities of from 0.1 to 5% by weight based on the polyethers.
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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |