Patent EP0074660A2 successfully refreshed from Google Patents.
EP0074660A2
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EP
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High molecular weight water soluble polymers
Assignee: Union Carbide Corp
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Filing: 1982-09-13
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Granted: —
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Expires: 2002-09-13
Abstract
Abstract Water soluble acrylamide containing polymers having an intrinsic viscosity of at least about 15 dl/g which are suitable for use in water purification.
Inventors
- 👤 You-Ling Fan
- 👤 Nan Shieh Chu
- 👤 George Lewis Brode
- 👤 Meyer Robert Rosen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 22:35
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08; C08F; C08F220/00; C08F220/02; C08F220/04; C08F220/06; C08F220/52; C08F220/54; C08F220/56
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
129 words
A water soluble acrylamide containing polymer having an intrinsic viscosity of at least about 15 dl/g and having the following formula: wherein R, R 1 and R 3 are independently hydrogen or methyl, R is an alkali metal ion, such as Na or K + , R 4 is OR 5 , where R 5 is an alkyl group having up to 5 carbon atoms, -O- -R7 wherein R 7 is either methyl or ethyl, -C- -R6, phenyl,substituted phenyl, CN, or and R 6 is an alkyl group having up to 8 carbon atoms, wherein (a) is from 5 to about 90, (b) is from 5 to about 90, (c) is from about 0.2 to about 20, and (d) is an integer of from about 100,000 to about 500,000.
Claim 2
Dependent Claim
129 words
A water soluble acrylamide containing polymer having an intrinsic viscosity of at least about 15 dl/g and having the following formula: wherein R, R 1 and R 3 are independently hydrogen or methyl, R is an alkali metal ion, such as Na or K + , R 4 is OR 5 , where R 5 is an alkyl group having up to 5 carbon atoms, -O- -R7 wherein R 7 is either methyl or ethyl, -C- -R6, phenyl,substituted phenyl, CN, or and R 6 is an alkyl group having up to 8 carbon atoms, wherein (a) is from 5 to about 90, (b) is from 5 to about 90, (c) is from about 0.2 to about 20, and (d) is an integer of from about 100,000 to about 500,000.
Claim 3
Dependent Claim
48 words
A water soluble polymer as defined in Claim 1, wherein the polymer has the following formula: wherein R, R 1 , R , R 3 , R 4 , a, b, c, and d are as previously defined and e is from about 0.1 to about 20 percent.
Claim 4
Dependent Claim
72 words
A water soluble polymer as defined in Claim 1, wherein the polymer has the following formula: wherein R is Na + or K + , R 7 is methyl, ethyl, butyl, and f is from about 5 to about 90, preferably from about 30 to about 60 percent, g is from about 5 to 90, preferably from about 30 to 60 percent and h is from about 0.2 to about 20 percent.
Claim 5
Dependent Claim
16 words
A water soluble polymer as defined in Claim 1, wherein the polymer has the following formula:
Claim 6
Dependent Claim
37 words
A water soluble polymer as defined in Claims 1 or 2 or 3 or 4 having an intrinsic viscosity of from about 18 to about 35 dl/g as measured in a one normal aqueous sodium chloride solution.
References Cited (Backward Citations)
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