US4735659A
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US
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Compositions and a process for preparing water dispersible polymers
Assignee: Drilling Specialties Co
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Filing: 1986-08-18
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Granted: 1988-04-05
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Expires: 2006-08-18
Abstract
Abstract Compositions of water soluble polymers coated with hydrophobic fumed silica are readily dispersed in water. A method for improving the water dispersibility of a water soluble polymer is disclosed.
Inventors
- 👤 Marshall D. Bishop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:54
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/05; C08K; C08K3/00; C08K3/34; C08K3/36; C08K9/00; C08K9/04; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C08J2300/00; C08J2300/10
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
62 words
A water dispersible particular polymeric composition; comprising by weight 90-99.95 water soluble polymer and 0.1-10% hydrophobic fumed silica; wherein said hyrdophobic fumed silica is present on the surface of said particulate polymeric composition; wherein said water soluble polymer is chosen from the group consisting essentially of: (a) cellulose ethers; (b) gums; (c) starches; (d) vinyl polymers; (e) acrylic polymers and; (f) biopolysacharides.
Claim 2
Dependent Claim
62 words
A water dispersible particular polymeric composition; comprising by weight 90-99.95 water soluble polymer and 0.1-10% hydrophobic fumed silica; wherein said hyrdophobic fumed silica is present on the surface of said particulate polymeric composition; wherein said water soluble polymer is chosen from the group consisting essentially of: (a) cellulose ethers; (b) gums; (c) starches; (d) vinyl polymers; (e) acrylic polymers and; (f) biopolysacharides.
Claim 3
Dependent Claim
25 words
A composition according to claim 1, wherein said cellulose ethers are selected from the group consisting of carboxymethylcellulose, methylcellulose, hydroxypropylmethylcellulose, hydroxypropylcellulose, hydroxyethylcellulose, ethylhydroxycellulose, and carboxymethyldroxyethylcellulose.
Claim 4
Dependent Claim
12 words
A composition according to claim 2, wherein said cellulose ether is carboxymethylcellulose.
Claim 5
Dependent Claim
12 words
A composition according to claim 2 wherein said cellulose ether is carboxymethylhydroxyethylcellulose.
Claim 6
Dependent Claim
23 words
A composition according to claim 1, wherein said starches are selected from the group consisting of carboxymethyl starch, hydroxyethyl starch, and hydroxypropyl starch.
Claim 7
Dependent Claim
36 words
A composition according to claim 1, wherein said gums are selected from the group consisting of arabic, trajacanth, karaya, shatti, locust bean, guar, psyllium seed, quince seed, agar, algin, carrageenin, furcellaran, pectin, gelatin, and larch gum.
Claim 8
Dependent Claim
24 words
A composition according to claim 1, wherein said vinyl polymer is chosen from the group consisting of polyvinyl pyrrolidone, polyvinyl alcohol, and carboxyvinyl polymers.
Claim 9
Dependent Claim
26 words
A composition according to claim 1, wherein said acrylic polymer is chosen from the group consisting of polyacrylic acid, polyacrylamide, acrylamide-acrylic acid, acrylamide-methacrylic acid, and acrylonitrile.
Claim 10
Dependent Claim
12 words
A composition according to claim 8 wherein said acrylic polymer is polyacrylamide.
Claim 11
Dependent Claim
48 words
A composition according to claim 1, wherein said biopolysacharide is chosen from the group consisting of a polysacharide produced by the action of Xanthomonas campestris, Xanthomonas phaseoli, Xanthomonas mulvacearn, Xanthomonas carotae, Xanthomonas translucens, Xanthomonas hederae, Xanthomonas papavericoli, Hansenula holstii, Arthrobacter viscous, Methylmonas mucosa, Erwinia tahitica, and Azotobacter indicus.
Claim 12
Dependent Claim
14 words
A composition according to claim 10, wherein said polysacharide is produced by Xanthomonas campestris.
Claim 13
Independent Claim
61 words
A method for improving the water dispersibility of water soluble polymers which comprises: (a) contacting a particulate water soluble polymer selected from the group consisting of cellulose ethers, starches, gums, vinyl polymers, acrylic polymers, and biopolysacharides with from 0.1-10 weight percent hydrophobic fumed silica so that the individual particles of said water soluble polymer are coated with said hydrophobic fumed silica.
Claim 14
Independent Claim
61 words
A method for improving the water dispersibility of water soluble polymers which comprises: (a) contacting a particulate water soluble polymer selected from the group consisting of cellulose ethers, starches, gums, vinyl polymers, acrylic polymers, and biopolysacharides with from 0.1-10 weight percent hydrophobic fumed silica so that the individual particles of said water soluble polymer are coated with said hydrophobic fumed silica.
Claim 15
Dependent Claim
24 words
The method of claim 12, wherein said cellulose ether is selected from the group consisting of carboxymethylcellulose, methylcellulose, hydroxypropylmethylcellulose, hydroxypropylcellulose, hydroxyethylcellulose, ethylhydroxycellulose, and carboxymethylhydroxyethylcellulose.
Claim 16
Dependent Claim
11 words
The method of claim 13 wherein said cellulose ether is carboxymethylcellulose.
Claim 17
Dependent Claim
11 words
The method of claim 13 wherein, said cellulose ether is carboxymethyldroxyethylcellulose.
Claim 18
Dependent Claim
19 words
The method of claim 12 wherein, said starch is selected from the group consisting of carboxymethylstarch, hydroxyethylstarch, and hydroxypropylstarch.
Claim 19
Dependent Claim
35 words
The method of claim 12, wherein said gum is selected from the group consisting of arabic, trajacanth, karaya, shatti, locust bean, guar, psyllium seed, quince seed, agar, algin, carrageenin, furcellaran, pectin, gelatin, and larch gum.
Claim 20
Dependent Claim
22 words
The method of claim 12, wherein said vinyl polymer is chosen from the group consisting of polyvinylpyrrolidone, polyvinyl alcohol, and carboxyvinyl polymers.
Claim 21
Dependent Claim
25 words
The method of claim 12, wherein said acrylic polymer is chosen from the group consisting of polyacrylic acid, polyacrylamide, acrylamide-acrylic acid, acrylamide-methacrylic acid, and acrylonitnrile.
Claim 22
Dependent Claim
11 words
The method of claim 19, wherein said acrylic polymer is polyacrylamide.
Claim 23
Dependent Claim
47 words
The method of claim 12 hwerein said biopolysacharide is selected from the group consisting of a polysacharide produced by the action of Xanthomonas campestris, Xanthomonas phaseoli, Xanthomonas mulvacearn, Xanthomonas carotae, Xanthomonas translucens, Xanthomonas hederae, Xanthomonas papavericoli, Hansenula holstii, Arthrobacter viscous, Methylmonas mucosa, Erwinia tahitica, and Azotobacter indicus.
Claim 24
Dependent Claim
13 words
The method of claim 21, wherein said polysacharide is produced by Xanthomonas campestris.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |