US4025484A
Expired / Lapsed
US
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Polymeric stabilized dispersions
Assignee: Dow Chemical Co
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Filing: 1976-09-07
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Granted: 1977-05-24
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Expires: 1996-09-07
Abstract
Abstract Dispersions of finely divided particulate solids in an organic liquid in which the solids are insoluble are stabilized by the addition of a polymeric dispersant having a degree of polymerization of about 10 to 100. An example of the polymeric dispersant is an interpolymer of styrene, maleic anhydride and a vinyl benzyl ether of ethoxylated nonyl phenol.
Inventors
- 👤 Syamalarao Evani
- 👤 Dennis McKeever
- 👤 Russell J. Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:05
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/215; C08F; C08F283/00; C08F283/06; C08K; C08K5/00; C09; C09D; C09D7/00; C09D7/40; C09D7/45; C08J2367/00; C08J2367/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
122 words
A dispersion of finely divided particulate solids in an organic liquid in which the solids are insoluble containing a sufficient amount of a polymeric dispersant to stabilize the dispersion, said dispersant having an average degree of polymerization of about 10 to 100 and comprising in interpolymerized form (a) a monoalkenyl aromatic monomer, (b) a vinyl acid or anhydride, and (c) a vinyl benzyl ether monomer having the formula ##STR3## where R may be hydrogen or methyl, m is about 10 to 100 and R 1 is a hydrophobic group of about 10 to 22 carbons; and wherein the molar amounts of monomer (a) and monomer (c) per mole of monomer (b) range from about 0.5 to 0.9 and 0.1 to 0.5, respectively.
Claim 2
Dependent Claim
122 words
A dispersion of finely divided particulate solids in an organic liquid in which the solids are insoluble containing a sufficient amount of a polymeric dispersant to stabilize the dispersion, said dispersant having an average degree of polymerization of about 10 to 100 and comprising in interpolymerized form (a) a monoalkenyl aromatic monomer, (b) a vinyl acid or anhydride, and (c) a vinyl benzyl ether monomer having the formula ##STR3## where R may be hydrogen or methyl, m is about 10 to 100 and R 1 is a hydrophobic group of about 10 to 22 carbons; and wherein the molar amounts of monomer (a) and monomer (c) per mole of monomer (b) range from about 0.5 to 0.9 and 0.1 to 0.5, respectively.
Claim 3
Dependent Claim
13 words
A dispersion according to claim 1 wherein the particulate solids are inorganic materials.
Claim 4
Dependent Claim
21 words
A dispersion according to claim 2 wherein the organic liquid is a solution of a thermosettable resin in a vinyl monomer.
Claim 5
Dependent Claim
31 words
A dispersion according to claim 2 where the dispersant is a copolymer of styrene, maleic acid or anhydride and a vinyl benzyl ether where R 1 is an alkyl phenyl group.
Claim 6
Dependent Claim
16 words
A dispersion according to claim 4 wherein R is hydrogen and m is 20 to 40.
Claim 7
Dependent Claim
16 words
A dispersion according to claim 2 wherein the resin is a terminally unsaturated vinyl ester resin.
References Cited (Backward Citations)
US3794608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |