Patent US4004939A successfully refreshed from Google Patents.
US4004939A
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Bisulfite terminated oligomers as dispersing agents
Assignee: Uniroyal Chemical Co Inc
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Filing: 1974-07-31
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Granted: 1977-01-25
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Expires: 1994-07-31
Abstract
Abstract This invention relates to the use of bisulfite-terminated oligomers as dispersants for solid particulate matter, i.e., low molecular weight bisulfate-terminated polymers containing carboxylate groups and either cyano or carbomethoxy moieties are improved dispersants for solid particulate matter like pigments such as titanium dioxide, clay, calcium carbonate, talc, and zinc oxide, as well as for organic pigments. Particularly, these dispersants have been found useful for stabilizing paper coating compositions.
Inventors
- 👤 John T. O'Brien
- 👤 Woodrow W. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:09
CPC Classifications
C; C07; C07C; C07C309/00; C09; C09K; C09K23/00; C09K23/10; D; D21; D21H; D21H19/00; D21H19/36; D21H19/38; D21H19/385; D21H19/40; D21H19/44; D21H19/46; D21H19/56; D21H19/58; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
101 words
A method of dispersing insoluble solid particulate matter selected from the group consisting of inorganic pigments, extenders, and fillers in aqueous systems containing 25 to 85% by weight solid particulate matter comprising adding, in an amount effective to disperse the solid particulate matter, an oligomer having the formula: ##STR4## wherein M is a water soluble cation; X is selected from --CN and --COOCH 3 ; M' is based on a cation selected from the group consisting of ammonia, an amine, and an alkali metal; a + b is from 4 to 250; and a/a + b is from 0.0 to 0.6.
Claim 2
Independent Claim
101 words
A method of dispersing insoluble solid particulate matter selected from the group consisting of inorganic pigments, extenders, and fillers in aqueous systems containing 25 to 85% by weight solid particulate matter comprising adding, in an amount effective to disperse the solid particulate matter, an oligomer having the formula: ##STR4## wherein M is a water soluble cation; X is selected from --CN and --COOCH 3 ; M' is based on a cation selected from the group consisting of ammonia, an amine, and an alkali metal; a + b is from 4 to 250; and a/a + b is from 0.0 to 0.6.
Claim 3
Dependent Claim
9 words
The method of claim 1 wherein X is --CN.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein X is --COOCH 3 .
Claim 5
Dependent Claim
26 words
The method of claim 1 wherein the solid particulate matter is selected from the group consisting of titanium dioxide, clay, calcium carbonate, talc, and zinc oxide.
Claim 6
Dependent Claim
27 words
The method of claim 1 wherein the oligomer is added at a rate of 0.01 to 10 parts by weight per 100 parts of solid particulate matter.
Claim 7
Dependent Claim
27 words
The method of claim 1 wherein the oligomer is added at a rate of 0.02 to 3 parts by weight per 100 parts of solid particulate matter.
Claim 8
Dependent Claim
14 words
The method of claim 1 wherein the oligomer is added as a concentrated solution.
Claim 9
Dependent Claim
11 words
The method of claim 1 wherein a+b is 10 to 60.
Claim 10
Dependent Claim
13 words
The method of claim 1 wherein a/a+b is from about 0.0 to 0.5.
Claim 11
Dependent Claim
13 words
The method of claim 1 wherein a/a+b is from about 0.0 to 0.4.
Claim 12
Dependent Claim
14 words
The method of claim 1 wherein the resultant dispersion is used for paper coating.
Claim 13
Dependent Claim
9 words
The method of claim 11 wherein X is --CN.
Claim 14
Dependent Claim
11 words
The method of claim 11 wherein X is --COOCH 3 .
Claim 15
Dependent Claim
11 words
The method of claim 11 wherein a+b is 4 to 50.
Claim 16
Dependent Claim
11 words
The method of claim 11 wherein a/a+b is 0.0 to 0.4.
Claim 17
Dependent Claim
11 words
The method of claim 11 wherein a/a+b is 0.0 to 0.2.
Claim 18
Dependent Claim
11 words
The method of claim 11 wherein a/a+b is 0.0 to 0.1.
Claim 19
Dependent Claim
9 words
The product produced by the method of claim 11.
Claim 20
Dependent Claim
89 words
A chemical composition comprising (a) 25 to 85% by weight insoluble solid particulate matter selected from the group consisting of inorganic pigments, extenders, and fillers, (b) water, and (c) an oligomeric dispersing agent having the formula: ##STR5##wherein M is a water soluble cation; X is selected from --CN and --COOCH 3 ; M' is based on a cation selected from the group consisting of ammonia, an amine, and an alkali metal; a + b is from 4 to 250; and a/a + b is from about 0.0 to 0.6.
Claim 21
Dependent Claim
89 words
A chemical composition comprising (a) 25 to 85% by weight insoluble solid particulate matter selected from the group consisting of inorganic pigments, extenders, and fillers, (b) water, and (c) an oligomeric dispersing agent having the formula: ##STR5##wherein M is a water soluble cation; X is selected from --CN and --COOCH 3 ; M' is based on a cation selected from the group consisting of ammonia, an amine, and an alkali metal; a + b is from 4 to 250; and a/a + b is from about 0.0 to 0.6.
Claim 22
Dependent Claim
27 words
The composition of claim 19 wherein the dispersing agent is present in an amount sufficient to disperse and maintain in a dispersed state the solid particulate matter.
Claim 23
Dependent Claim
9 words
The composition of claim 19 wherein X is --CN.
Claim 24
Dependent Claim
11 words
The composition of claim 19 wherein X is --COOCH 3 .
Claim 25
Dependent Claim
25 words
The composition of claim 19 wherein the dispersing agent is present in 0.01 to 10 parts by weight per 100 parts of solid particulate matter.
Claim 26
Dependent Claim
25 words
The composition of claim 19 wherein the dispersing agent is present in 0.0125 to 5 parts by weight per 100 parts of solid particulate matter.
Claim 27
Dependent Claim
25 words
The composition of claim 19 wherein the dispersing agent is present in 0.02 to 3 parts by weight per 100 parts of solid particulate matter.
Claim 28
Dependent Claim
26 words
The composition of claim 19 wherein the solid particulate matter is selected from the group consisting of titanium dioxide, clay, calcium carbonate, talc and zinc oxide.
Claim 29
Dependent Claim
17 words
The composition of claim 19 wherein the dispersing agent is in the form of a concentrated solution.
Claim 30
Dependent Claim
11 words
The composition of claim 19 wherein a+b is 10 to 60.
Claim 31
Dependent Claim
13 words
The composition of claim 19 wherein a/a+b is from about 0.0 to 0.5.
Claim 32
Dependent Claim
12 words
The composition of claim 19 wherein a/a+b is from 0.0 to 0.4.
Claim 33
Dependent Claim
16 words
The composition of claim 19 additionally containing (d) a pigment binder which is protein or starch.
Claim 34
Dependent Claim
12 words
The use of the composition of claim 31 as a paper coating.
Claim 35
Dependent Claim
9 words
The use of claim 32 wherein X is --CN.
Claim 36
Dependent Claim
11 words
The use of claim 32 wherein X is --COOCH 3 .
Claim 37
Dependent Claim
11 words
The use of claim 32 wherein a+b is 4 to 50.
Claim 38
Dependent Claim
11 words
The use of claim 32 wherein a/a+b is 0.0 to 0.4.
Claim 39
Dependent Claim
11 words
The use of claim 32 wherein a/a+b is 0.0 to 0.2.
Claim 40
Dependent Claim
11 words
The use of claim 32 wherein a/a+b is 0.0 to 0.1.
Claim 41
Dependent Claim
29 words
The use of claim 32 wherein the solid particulate matter is selected from the group consisting of clay, calcium carbonate, titanium dioxide, satin white, barium sulfate, and combinations thereof.
Claim 42
Dependent Claim
29 words
The use of claim 32 wherein the composition contains at least one additive selected from the group consisting of crosslinking agents, optical brighteners, flow regulators, thickeners, biocides and defoamers.
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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) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |