US4684704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrophobically modified hydroxyethyl cellulose in aqueous polymerization dispersions
Assignee: Hercules LLC
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Filing: 1986-06-19
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Granted: 1987-08-04
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Expires: 2006-06-19
Abstract
Abstract Disclosed are aqueous dispersions having improved rheological and stability characteristics prepared by the emulsion polymerization of low protective colloid grafting potential monomers in the presence of a hydrophobically modified hydroxyethyl cellulose. The resultant aqueous dispersions or latices are useful in the manufacture of latex paints, binders for nonwoven materials, water-based inks, paper coatings and water-borne adhesives, such as pressure-sensitive adhesives.
Inventors
- 👤 Daniel H. Craig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:09
CPC Classifications
C; C08; C08F; C08F251/00; C08F251/02; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
A process for the emulsion polymerization of low protective colloid-grafting potential ethylenically unsaturated monomers in the presence of a polymerization catalyst wherein the improvement comprises conducting the emulsion polymerization in the presence of from about 0.01% to about 1.7%, by weight of the total monomer content, of a hydrophobically modified hydroxyethyl cellulose having a hydrocarbon radical having from 8 to 25 carbon atoms in an amount of from about about 0.1% to about 2.0%, by weight of the hydrophobically modified hydroxyethyl cellulose, and a hydroxyethyl M.S. of from about 2.5 to about 3.5 and the emulsion polymerization process produces polymer latices having a particle size of less than 1.0 micron.
Claim 2
Dependent Claim
110 words
A process for the emulsion polymerization of low protective colloid-grafting potential ethylenically unsaturated monomers in the presence of a polymerization catalyst wherein the improvement comprises conducting the emulsion polymerization in the presence of from about 0.01% to about 1.7%, by weight of the total monomer content, of a hydrophobically modified hydroxyethyl cellulose having a hydrocarbon radical having from 8 to 25 carbon atoms in an amount of from about about 0.1% to about 2.0%, by weight of the hydrophobically modified hydroxyethyl cellulose, and a hydroxyethyl M.S. of from about 2.5 to about 3.5 and the emulsion polymerization process produces polymer latices having a particle size of less than 1.0 micron.
Claim 3
Dependent Claim
40 words
The process of claim 1 wherein the emulsion polymerization comprises polymerizing the low protective colloid-grafting potential monomers in an aqueous emulsion at from about 20° C. to about 120° C. in the presence of a water-soluble free radical polymerization initiator.
Claim 4
Dependent Claim
17 words
The process as claimed in claim 2 wherein the free radical polymerization initiator is a water-soluble peroxide.
Claim 5
Dependent Claim
34 words
The process of claim 1 wherein the hydrocarbon radical of the hydrophobically modified hydroxyethyl cellulose is present in an amount from about 0.4% to about 0.9%, by weight of the hydrophobically modified hydroxyethyl cellulose.
Claim 6
Dependent Claim
24 words
The process as claimed in claim 1 wherein the hydrophobically modified hydroxyethyl cellulose is present in an amount from about 0.05% to about 1%.
Claim 7
Dependent Claim
24 words
The process as claimed in claim 1 wherein the hydrophobically modified hydroxyethyl cellulose is present in an amount from about 0.1% to about 0.5%.
Claim 8
Dependent Claim
46 words
The process of claim 3 wherein the low protective colloid-grafting potential monomers are selected from the group consisting of vinyl esters, vinyl ethers, vinyl and vinylidene halides, N-vinyl pyrrolidone, ethylene, C 3 or greater alpha-olefins, allyl amines, allyl esters of saturated monocarboxylic acids and amides thereof.
Claim 9
Dependent Claim
33 words
The process of claim 1 wherein the hydrophobically modified hydroxyethyl cellulose has a hydrocarbon radical having from 8 to 20 carbon atoms and a hydroxyethyl M.S. of from about 2.9 to about 3.5.
Claim 10
Dependent Claim
34 words
The process of claim 1 wherein the hydrocarbon radical of the hydrophobically modified hydroxyethyl cellulose is present in an amount from about 0.1% to about 2.0%, by weight of the hydrophobically modified hydroxyethyl cellulose.
Claim 11
Dependent Claim
47 words
The process of claim 1 wherein the low protective colloid-grafting potential ethylenically unsaturated monomers selected from the group consisting of vinyl esters, vinyl ethers, vinyl and vinylidene halides, N-vinyl pyrrolidone, ethylene, C 3 or greater alpha-olefins, allyl amines, allyl esters of saturated monocarboxylic acids and amides thereof.
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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) | 1990-08-03 | 1991-02-02 | 1991-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-03 | 1995-02-02 | 1995-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-03 | 1999-02-02 | 1999-08-04 | $7700.00 | Window Closed / Lapsed |