US4097430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous polymeric dispersions made thixotropic by certain ammonium or potassium zirconium carbonates
Assignee: Magnesium Elektron Ltd
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Filing: 1976-08-12
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Granted: 1978-06-27
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Expires: 1996-08-12
Abstract
Abstract Aqueous solutions of R zirconium carbonate in which R is selected from ammonium and potassium have a carbonate: zirconia molar ratio not greater than about 2 are used to impart thixotropic properties to aqueous dispersions of polymers and copolymers containing a water-soluble organic colloid containing a hydroxy group, such as emulsion paint. The solutions may be prepared by reacting zirconium basic carbonate with ammonium or potassium carbonate solution and have a good storage stability, especially at high concentrations.
Inventors
- 👤 Raymond Francis Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:08
CPC Classifications
C; C01; C01G; C01G25/00; C01G25/006; C08; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C09; C09D; C09D5/00; C09D5/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
108 words
A method of making a thixotropic aqueous dispersion of a polymer or copolymer selected from the group consisting of alkyd resins and products obtained by polymerisation of at least one of vinyl esters, acrylic esters, methacrylic esters, styrene, acrylonitrile, ethylene and vinylidine chloride which comprises mixing with a dispersion of said polymer or copolymer (1) an amount sufficient of an aqueous solution of ammonium zirconium carbonate to impart thixotropic properties to said dispersion, said solution containing 18-25% by weight of zirconium expressed as zirconium dioxide and having a molar ratio of carbonate to zirconium not greater than 2.05; and (2) a water-soluble organic colloid containing an hydroxyl group.
Claim 2
Independent Claim
108 words
A method of making a thixotropic aqueous dispersion of a polymer or copolymer selected from the group consisting of alkyd resins and products obtained by polymerisation of at least one of vinyl esters, acrylic esters, methacrylic esters, styrene, acrylonitrile, ethylene and vinylidine chloride which comprises mixing with a dispersion of said polymer or copolymer (1) an amount sufficient of an aqueous solution of ammonium zirconium carbonate to impart thixotropic properties to said dispersion, said solution containing 18-25% by weight of zirconium expressed as zirconium dioxide and having a molar ratio of carbonate to zirconium not greater than 2.05; and (2) a water-soluble organic colloid containing an hydroxyl group.
Claim 3
Dependent Claim
38 words
A method as claimed in claim 1, which comprises mixing with a dispersion of said polymer or copolymer an aqueous solution of ammonium zirconium carbonate containing from 18 to 22% by weight of zirconium expressed as zirconium dioxide.
Claim 4
Dependent Claim
46 words
A method as claimed in claim 1, in which said solution of ammonium zirconium carbonate is prepared by reacting zirconium basic carbonate with an aqueous solution or slurry of ammonium carbonate containing from 1.0 to 1.5 moles of ammonium carbonate per mole of zirconium basic carbonate.
Claim 5
Dependent Claim
29 words
A method as claimed in claim 1, in which the quantity of ammonium zirconium carbonate, expressed as a solid, is from 0.1 to 2% by weight of the dispersion.
Claim 6
Dependent Claim
35 words
A method as claimed in claim 1, in which the dispersion of said polymer or copolymer is mixed with a water soluble organic colloid selected from the group consisting of cellulose ethers and starch derivatives.
Claim 7
Dependent Claim
48 words
A method as claimed in claim 1, in which the dispersion of said polymer or copolymer, said aqueous solution of ammonium zirconium carbonate and said water soluble organic colloid are mixed to give a thixotropic aqueous dispersion containing up to 30% by weight of said polymer or copolymer.
Claim 8
Dependent Claim
41 words
A method as claimed in claim 1, in which said water soluble organic colloid is mixed with said dispersion of said polymer or copolymer to give a thixotropic aqueous dispersion containing from about 0.2 to 0.3% by weight of said colloid.
Claim 9
Independent Claim
92 words
A method of making a thixotropic aqueous dispersion of a polymer or copolymer selected from the group consisting of alkyd resins and products obtained by polymerisation of at least one of vinyl esters, acrylic esters, methacrylic esters, styrene, acrylonitrile, ethylene and vinylidine chloride which comprises mixing with a dispersion of said polymer or copolymer (1) an amount sufficient to impart thixotropic properties to said dispersion of potassium zirconium carbonate having a molar ratio of carbonate to zirconium not greater than 1.85, and (2) a water soluble organic colloid containing an hydroxyl group.
Claim 10
Independent Claim
92 words
A method of making a thixotropic aqueous dispersion of a polymer or copolymer selected from the group consisting of alkyd resins and products obtained by polymerisation of at least one of vinyl esters, acrylic esters, methacrylic esters, styrene, acrylonitrile, ethylene and vinylidine chloride which comprises mixing with a dispersion of said polymer or copolymer (1) an amount sufficient to impart thixotropic properties to said dispersion of potassium zirconium carbonate having a molar ratio of carbonate to zirconium not greater than 1.85, and (2) a water soluble organic colloid containing an hydroxyl group.
Claim 11
Dependent Claim
41 words
A method as claimed in claim 8, in which said solution of potassium zirconium carbonate is prepared by reacting zirconium basic carbonate with an aqueous solution containing from 0.8 to 1.3 mole of potassium carbonate per mole of zirconium basic carbonate.
Claim 12
Dependent Claim
29 words
A method as claimed in claim 8, in which the quantity of potassium zirconium carbonate, expressed as a solid, is from 0.1 to 2% by weight of the dispersion.
Claim 13
Dependent Claim
35 words
A method as claimed in claim 8, in which the dispersion of said polymer or copolymer is mixed with a water soluble organic colloid selected from the group consisting of cellulose ethers and starch derivatives.
Claim 14
Dependent Claim
46 words
A method as claimed in claim 8, in which the dispersion of said polymer or copolymer, said of potassium zirconium carbonate and said water soluble organic colloid are mixed to give a thixotropic aqueous dispersion containing up to 30% by weight of said polymer or copolymer.
Claim 15
Dependent Claim
41 words
A method as claimed in claim 8, in which said water soluble organic colloid is mixed with said dispersion of said polymer or copolymer to give a thixotropic aqueous dispersion containing from about 0.2 to 0.3% by weight of said colloid.
References Cited (Backward Citations)
US2641558A
Cited
GB1029723A
Cited
US3418073A
Cited
US3425896A
Cited
US3615172A
Cited
US3741782A
Cited
US4061720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-26 | 1981-12-26 | 1982-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-26 | 1985-12-26 | 1986-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-26 | 1989-12-26 | 1990-06-27 | $7700.00 | Window Closed / Lapsed |