US5066749A
Expired / Lapsed
US
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Hydrophobically-modified polycarboxylates and process for their preparation
Assignee: National Starch and Chemical Investment Holding Corp
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Filing: 1990-09-11
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Granted: 1991-11-19
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Expires: 2010-09-11
Abstract
Abstract This invention provides interpolymers comprising repeating units of the structure: ##STR1## wherein m is a mole fraction from 0.70 to 0.95; n is a mole fraction from 0.05 to 0.30; A is derived from at least one ethylenically unsaturated carboxylic acid monomer; B is derived from at least one ethylenically unsaturated carboxylic acid monomer and B is not A; and C is: ##STR2## wherein X is --H, ##STR3## or a combination thereof, R 1 is --H, --CH 3 , or --(CH 2 ) q --CH 3 , or a combination thereof, and q is 1-5; R 2 is: ##STR4## or R 3 , or a combination thereof, and R 3 is C 8 -C 18 linear or branched alkyl chain; the interpolymer being prepared by polymerizing the monomers in a solvent system in which the monomers and interpolymer are soluble. Also provided is a polymerization process for preparing hydrophobically-modified polycarboxylate builders which are compatible with liquid detergent formulations.
Inventors
- 👤 John C. Leighton
- 👤 Carmine P. Iovine
- 👤 Michael P. Aronson
- 👤 David L. Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:14
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/04; C08F2/00; C08F2/04; C08F2/06; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3765
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
143 words
An interpolymer comprising repeating units of the structure: ##STR17## wherein m is a mole fraction from 0.70 to 0.95; n is a mole fraction from 0.05 to 0.30; A and B are a polymerized residue of ethenically unsaturated carboxylic acid monomer(s), selected from monocarboxylic acids, dicarboxylic acids and their anhydrides and esters, and B is not A; and C is: a polymerized residue of at least one monomer, selected from the group consisting of C 8 -C 18 linear or branched alkyl ester(s) of ethylenically unsaturated carboxylic acid(s); C 8 -C 18 alpha-olefin(s); and vinyl esters of C 8 -C 18 carboxylic acid(s); the interpolymer being prepared by polymerizing the monomers in a solvent system in which the monomers and interpolymer are soluble, whereby the monomer of which C is the polymerized residue is instantaneously and homogeneously copolymerized with the carboxylic acid monomers.
Claim 2
Dependent Claim
143 words
An interpolymer comprising repeating units of the structure: ##STR17## wherein m is a mole fraction from 0.70 to 0.95; n is a mole fraction from 0.05 to 0.30; A and B are a polymerized residue of ethenically unsaturated carboxylic acid monomer(s), selected from monocarboxylic acids, dicarboxylic acids and their anhydrides and esters, and B is not A; and C is: a polymerized residue of at least one monomer, selected from the group consisting of C 8 -C 18 linear or branched alkyl ester(s) of ethylenically unsaturated carboxylic acid(s); C 8 -C 18 alpha-olefin(s); and vinyl esters of C 8 -C 18 carboxylic acid(s); the interpolymer being prepared by polymerizing the monomers in a solvent system in which the monomers and interpolymer are soluble, whereby the monomer of which C is the polymerized residue is instantaneously and homogeneously copolymerized with the carboxylic acid monomers.
Claim 3
Dependent Claim
45 words
The interpolymer of claim 1, wherein the interpolymer is prepared by slowly adding a charge comprising the monomer(s) of which C is the polymerized residue to the carboxylic acid monomer(s) over a period of time sufficient to permit instantaneous and uniform copolymerization of the monomers.
Claim 4
Dependent Claim
79 words
The interpolymer of claim 1, wherein the interpolymer is prepared by a process comprising the steps: (a) providing an initial charge comprising up to 100%, by weight, of at least one monomer of which A or B is the polymerized residue; (b) adding to the initial charge a charge comprising at least one monomer of which C is the polymerized residue; and (c) polymerizing the monomers in solution in the presence of an initiator and a non-haloalkane, hydrophobic solvent.
Claim 5
Dependent Claim
43 words
The interpolymer of claim 3, wherein the process further comprises the step of adding at least one monomer of which A or B is the polymerized residue simultaneously with the charge comprising at least one monomer of which C is the polymerized residue.
Claim 6
Dependent Claim
23 words
The interpolymer of claim 3, wherein the process further comprises the step of removing the solvent and recovering the interpolymer in dry form.
Claim 7
Dependent Claim
20 words
The interpolymer of claim 3, wherein the process further comprises the step of extracting the interpolymer into an aqueous solvent.
Claim 8
Dependent Claim
16 words
The interpolymer of claim 6, wherein the process further comprises the step of spray-drying the interpolymer.
Claim 9
Dependent Claim
16 words
The interpolymer of claim 6, wherein the process further comprises the step of azeotropic solvent removal.
Claim 10
Dependent Claim
21 words
The interpolymer of claim 4, wherein acrylic acid is simultaneously added with the monomer of which C is the polymerized residue.
Claim 11
Dependent Claim
18 words
The interpolymer of claim 4, wherein the monomer of which C is the polymerized residue is lauryl methacrylate.
Claim 12
Dependent Claim
31 words
The interpolymer of claim 4, wherein A is a polymerized residue of acrylic acid, B is a polymerized residue of maleic anhydride and C is a polymerized residue of lauryl methacrylate.
Claim 13
Dependent Claim
17 words
The interpolymer of claim 11, wherein the interpolymer has a molecular weight from about 3,000 to 15,000.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-11-18 | 1995-05-20 | 1995-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-11-18 | 1999-05-20 | 1999-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-11-18 | 2003-05-20 | 2003-11-19 | $7700.00 | Window Closed / Lapsed |