US4500693A
Expired / Lapsed
US
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Water soluble copolymer method for manufacture therefore and use thereof
Assignee: Nippon Shokubai Co Ltd
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Filing: 1984-05-25
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Granted: 1985-02-19
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Expires: 2004-05-25
Abstract
Abstract A water-soluble copolymer useful for scale inhibitor and pigment dispersant, comprising 50 to 99.5 mol % of repeating units represented by the general formula I: ##STR1## wherein, R 1 denotes a hydrogen atom or methyl group and X a hydrogen atom, alkali metal atom, alkaline earth metal atom, ammonium group, or organic amine group and 50 to 0.5 mol % of repeating units represented by the general formula II: ##STR2## wherein, p denotes an integer of the value of 1 to 4, q and r independently denote 0 or an integer of the value of 0 to 100, R 2 and R 3 independently denote an alkylene group of 2 to 4 carbon atoms, and Y and Z independently denote a hydroxyl group, an alkoxy group of 1 to 4 carbon atoms, a monovalent phosphoric acid group or an alkali metal salt, alkaline earth metal salt, ammonium salt, or organic amine salt thereof or a mono- or di-ester thereof with an alkyl of 1 to 4 carbon atoms, a monovalent sulfonic acid group or an alkali metal salt, alkaline earth metal salt, ammonium salt, or organic amine salt thereof or an ester thereof with an alkyl of 1 to 4 carbon atoms.
Inventors
- 👤 Hidetoshi Takehara
- 👤 Shorbu Shioji
- 👤 Yohichi Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:28
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/04; C08F220/06; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/12; C07; C07C; C07C51/00; C07C51/42; C07C51/50; C09; C09D; C09D7/00; C09D7/40; C09D7/45
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
124 words
A water-soluble copolymer, comprising 50 to 99.5 mol% of repeating units represented by the general formula I: ##STR12## wherein, R 1 denotes A hydrogen atom or methyl group and X a hydrogen atom, alkali metal atom, alkaline earth metal atom, ammonium group or organic amine group, and 50 to 0.5 mol% of repeating units represented by the general formula II: ##STR13## wherein, p denotes an integer of the value of 1 to 4, q and r independently denote O or an integer of the value of 1 to 100, R 2 and R 3 independently denote an alkylene group of 2 to 4 carbon atoms, Y denotes a hydroxyl group, and Z denotes a monovalent sulfonic acid group or an alkali metal salt thereof.
Claim 2
Dependent Claim
124 words
A water-soluble copolymer, comprising 50 to 99.5 mol% of repeating units represented by the general formula I: ##STR12## wherein, R 1 denotes A hydrogen atom or methyl group and X a hydrogen atom, alkali metal atom, alkaline earth metal atom, ammonium group or organic amine group, and 50 to 0.5 mol% of repeating units represented by the general formula II: ##STR13## wherein, p denotes an integer of the value of 1 to 4, q and r independently denote O or an integer of the value of 1 to 100, R 2 and R 3 independently denote an alkylene group of 2 to 4 carbon atoms, Y denotes a hydroxyl group, and Z denotes a monovalent sulfonic acid group or an alkali metal salt thereof.
Claim 3
Dependent Claim
23 words
A copolymer according to claim 1, wherein q and r independently denote 0 or an integer having the value of 1 to 20.
Claim 4
Dependent Claim
16 words
A copolymer according to claim 1, wherein X denotes an alkali metal atom or ammonium group.
Claim 5
Dependent Claim
13 words
A copolymer according to claim 1, wherein X denotes an alkali metal atom.
Claim 6
Dependent Claim
13 words
A copolymer according to claim 1, wherein R 1 denotes a hydrogen atom.
Claim 7
Dependent Claim
19 words
A copolymer according to claim 1, wherein R 1 denotes a hydrogen atom and X an alkali metal atom.
Claim 8
Dependent Claim
12 words
A copolymer according to claim 1, wherein p denotes 1 or 4.
Claim 9
Dependent Claim
13 words
A copolymer according to claim 7, wherein q and r independently denote 0.
Claim 10
Dependent Claim
37 words
A copolymer according to claim 1, wherein the repeating units represented by the general formula I account for 50 to 98 mol% and the repeating units represented by the general formula II for 50 to 2 mol%.
Claim 11
Independent Claim
131 words
A method for the manufacture of a water-soluble copolymer comprising 50 to 99.5 mol% of repeating units represented by the general formula I: ##STR14## wherein, R 1 and X are as defined above, and 50 to 0.5 mol% of repeating units represented by the general formula II: ##STR15## wherein, p, q, r, R 2 , R 3 , Y and Z are as defined above, which method comprises copolymerizing 50 to 99.5 moles of at least one acrylic acid-based monomer represented by the formula III: ##STR16## wherein, R 1 and X are as defined above, and 0.5 to 50 moles of at least one allyl ether-based monomer represented by the general formula IV: ##STR17## wherein, p, q, r, R 2 , R 3 , Y and Z are as defined above.
Claim 12
Independent Claim
131 words
A method for the manufacture of a water-soluble copolymer comprising 50 to 99.5 mol% of repeating units represented by the general formula I: ##STR14## wherein, R 1 and X are as defined above, and 50 to 0.5 mol% of repeating units represented by the general formula II: ##STR15## wherein, p, q, r, R 2 , R 3 , Y and Z are as defined above, which method comprises copolymerizing 50 to 99.5 moles of at least one acrylic acid-based monomer represented by the formula III: ##STR16## wherein, R 1 and X are as defined above, and 0.5 to 50 moles of at least one allyl ether-based monomer represented by the general formula IV: ##STR17## wherein, p, q, r, R 2 , R 3 , Y and Z are as defined above.
Claim 13
Dependent Claim
44 words
A method according to claim 10, wherein the reaction is carried out in the presence of 0.05 to 20% by weight, based on the total amount of the monomers, of a polymerization initiator at a temperature in the range of 50° to 200° C.
Claim 14
Dependent Claim
23 words
A method according to claim 11, wherein the reaction is carried out at a temperature in the range of 80° to 150° C.
Claim 15
Dependent Claim
23 words
A method according to claim 10, wherein q and r independently denote 0 or an integer having the value of 1 to 20.
Claim 16
Dependent Claim
16 words
A method according to claim 10, wherein X denotes an alkali metal atom or ammonium group.
Claim 17
Dependent Claim
13 words
A method according to claim 10, wherein X denotes an alkali metal atom.
Claim 18
Dependent Claim
13 words
A method according to claim 10, wherein R 1 denotes a hydrogen atom.
Claim 19
Dependent Claim
19 words
A method according to claim 15, wherein R 1 denotes a hydrogen atom and X an alkali metal atom.
Claim 20
Dependent Claim
12 words
A method according to claim 15, wherein p denotes 1 or 4.
Claim 21
Dependent Claim
13 words
A method according to claim 18, wherein q and r independently denote 0.
Claim 22
Dependent Claim
37 words
A method according to claim 15, wherein the repeating units represented by the general formula I account for 50 to 98 mol% and the repeating units represented by the general formula II or 50 to 2 mol%.
Claim 23
Dependent Claim
16 words
A scale inhibitor having as main component thereof the water-soluble copolymer set forth in claim 1.
Claim 24
Dependent Claim
16 words
A pigment dispersant having as main component thereof the water-soluble copolymer set forth in claim 1.
References Cited (Backward Citations)
GB1103947A
Cited
US4267103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |