Patent US5554726A successfully refreshed from Google Patents.
US5554726A
Expired / Lapsed
US
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Method for producing hydrogenated NBR latex
Assignee: Sumitomo Seika Chemicals Co Ltd
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Filing: 1994-11-21
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Granted: 1996-09-10
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Expires: 2014-11-21
Abstract
Abstract The object of this invention is to provide a method for producing a hydrogenated NBR latex with sufficiently reduced latex particle size and excellent standing stability without using any harmful solvent or restricting the kind of usable emulsifier. The method for producing hydrogenated NBR latex according to this invention comprises mixing an organic layer in which a hydrogenated NBR is dissolved in an organic solvent with an aqueous layer in which an emulsifier is dissolved in water, then agitating the mixture, and removing the organic solvent by distillation, characterized in that said emulsification is performed in the presence of an alcohol.
Inventors
- 👤 Eiichi Araki
- 👤 Norihiro Sugihara
- 👤 Mari Kamada
- 👤 Taiji Matsukawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:21
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/02; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/07; C08J2309/00; C08J2309/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
86 words
A method for producing a hydrogenated nitrile-butadiene rubber latex comprising mixing an organic layer in which a hydrogenated nitrile-butadiene rubber is dissolved in an organic solvent with an aqueous layer in which an emulsifier is dissolved in water, then agitating the mixture, and removing the organic solvent by distillation, characterized in that said emulsification is performed in the presence of an alcohol having the general formula of ROH (wherein R is an unsubstituted, saturated or unsaturated, aliphatic or aralkyl hydrocarbon having 1 to 9 carbon atoms).
Claim 2
Independent Claim
86 words
A method for producing a hydrogenated nitrile-butadiene rubber latex comprising mixing an organic layer in which a hydrogenated nitrile-butadiene rubber is dissolved in an organic solvent with an aqueous layer in which an emulsifier is dissolved in water, then agitating the mixture, and removing the organic solvent by distillation, characterized in that said emulsification is performed in the presence of an alcohol having the general formula of ROH (wherein R is an unsubstituted, saturated or unsaturated, aliphatic or aralkyl hydrocarbon having 1 to 9 carbon atoms).
Claim 3
Dependent Claim
32 words
The method for producing hydrogenated nitrile-butadiene rubber latex according to claim 1, wherein said alcohol is added to only said aqueous layer or to both said aqueous layer and said organic layer.
Claim 4
Dependent Claim
38 words
The method for producing hydrogenated nitrile-butadiene rubber latex according to claim 1, wherein the amount of said alcohol to be added is 10 to 2000 parts by weight based on 100 parts by weight of said hydrogenated NBR.
Claim 5
Dependent Claim
28 words
The method for producing hydrogenated nitrile-butadiene rubber latex according to claim 2, wherein 30 to 100% of said alcohol to be added is added to said aqueous layer.
Claim 6
Dependent Claim
38 words
The method for producing hydrogenated nitrile-butadiene rubber latex according to claim 1, wherein said alcohol is represented by the general formula of R 1 OH (wherein R 1 is an alkyl group having 1 to 5 carbon atoms).
Claim 7
Dependent Claim
27 words
The method for producing hydrogenated nitrile-butadiene rubber latex according to claim 5, wherein said alcohol is ethyl alcohol, n-propyl alcohol, isopropyl alcohol, sec-butyl alcohol or tert-butyl alcohol.
Claim 8
Dependent Claim
39 words
The method for producing hydrogenated nitrile-butadiene rubber latex according to claim 2, wherein the amount of said alcohol to be added is 10 to 2000 parts by weight based on 100 parts by weight of said hydrogenated nitrile-butadiene rubber.
Claim 9
Dependent Claim
28 words
The method for producing hydrogenated nitrile-butadiene rubber latex according to claim 3, wherein 30 to 100% of said alcohol to be added is added to said aqueous layer.
Claim 10
Dependent Claim
38 words
The method for producing hydrogenated nitrile-butadiene rubber latex according to claim 2, wherein said alcohol is represented by the general formula of R 1 OH (wherein R 1 is an alkyl group having 1 to 5 carbon atoms).
Claim 11
Dependent Claim
38 words
The method for producing hydrogenated nitrile-butadiene rubber latex according to claim 3, wherein said alcohol is represented by the general formula of R 1 OH (wherein R 1 is an alkyl group having 1 to 5 carbon atoms).
Claim 12
Dependent Claim
38 words
The method for producing hydrogenated nitrile-butadiene rubber latex according to claim 4, wherein said alcohol is represented by the general formula of R 1 OH (wherein R 1 is an alkyl group having 1 to 5 carbon atoms).
References Cited (Backward Citations)
US3558576A
Cited
US3923738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-09-10 | 2000-03-11 | 2000-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-10 | 2004-03-11 | 2004-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-10 | 2008-03-11 | 2008-09-10 | $7700.00 | Window Closed / Lapsed |