US4341679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinylidene chloride co-polymer latex compositions
Assignee: Syngenta Ltd
•
Filing: 1977-12-12
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Granted: 1982-07-27
•
Expires: 1997-12-12
Abstract
Abstract An aqueous latex of a copolymer derived from defined relative proportions of (i) vinylidene chloride, (ii) vinyl chloride, (iii) an alkyl acrylate or methacrylate and (iv) an unsaturated carboxylic acid forms stable protective films on a variety of substrates.
Inventors
- 👤 Anthony J. Burgess
- 👤 David L. Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:14
CPC Classifications
C; C09; C09D; C09D127/00; C09D127/02; C09D127/04; C09D127/08; C08; C08F; C08F214/00; C08F214/02; C08F214/04; C08F214/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31649; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31855
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
144 words
An aqueous latex of a copolymer capable of forming stable films which have excellent protective properties on metallic substrates, said films having good chemical resistance and low permeability to water vapour, said copolymer consisting essentially of (i) vinylidene chloride, (ii) vinyl chloride, (iii) one or more alkyl acrylates having from 1 to 12 carbon atoms in the alkyl group and/or one or more alkyl methacrylates having from 2 to 12 carbon atoms in the alkyl group and (iv) one or more aliphatic alpha-beta-unsaturated carboxylic acids, the proportion of vinylidene chloride being from 65 to 90 parts by weight, the proportion of the said alkyl acrylates and/or methacrylates being from 2 to 15 parts by weight and the proportion of the said carboxylic acids being from 0.2 to 8 parts by weight, per hundred parts by weight of the total vinylidene chloride and vinyl chloride.
Claim 2
Dependent Claim
144 words
An aqueous latex of a copolymer capable of forming stable films which have excellent protective properties on metallic substrates, said films having good chemical resistance and low permeability to water vapour, said copolymer consisting essentially of (i) vinylidene chloride, (ii) vinyl chloride, (iii) one or more alkyl acrylates having from 1 to 12 carbon atoms in the alkyl group and/or one or more alkyl methacrylates having from 2 to 12 carbon atoms in the alkyl group and (iv) one or more aliphatic alpha-beta-unsaturated carboxylic acids, the proportion of vinylidene chloride being from 65 to 90 parts by weight, the proportion of the said alkyl acrylates and/or methacrylates being from 2 to 15 parts by weight and the proportion of the said carboxylic acids being from 0.2 to 8 parts by weight, per hundred parts by weight of the total vinylidene chloride and vinyl chloride.
Claim 3
Dependent Claim
33 words
A latex according to claim 1 wherein the proportion of vinylidene chloride is from 70 to 80 parts by weight per hundred parts by weight of the total vinylidene chloride and vinyl chloride.
Claim 4
Dependent Claim
35 words
A latex according to claim 1 wherein the proportion of the alkyl acrylate(s) and/or methacrylate(s) is from 4 to 10 parts by weight per hundred parts by weight of total vinylidene chloride and vinyl chloride.
Claim 5
Dependent Claim
33 words
A latex according to claim 1 wherein the proportion of the carboxylic acid(s) is from 1 to 4 parts by weight per hundred parts by weight of total vinylidene chloride and vinyl chloride.
Claim 6
Dependent Claim
13 words
A latex according to claim 1 containing 2-ethylhexyl acrylate as the alkyl acrylate.
Claim 7
Dependent Claim
15 words
A latex according to claim 1 containing butyl methacrylate or 2-ethylhexyl methacrylate as the methacrylate.
Claim 8
Dependent Claim
13 words
A latex according to claim 1 containing acrylic acid as the carboxylic acid.
Claim 9
Dependent Claim
17 words
A latex according to claim 1 characterised in that the minimum film-forming temperature is below 30° C.
Claim 10
Dependent Claim
20 words
A latex according to claim 8 having a minimum film-forming temperature in the range from -10° C. to 20° C.
Claim 11
Dependent Claim
20 words
A latex according to claim 9 having a minimum film-forming temperature in the range from 6° C. to 15° C.
Claim 12
Dependent Claim
101 words
An aqueous latex of a copolymer capable of forming stable films which have excellent protection properties on metallic substrates, said films having good chemical resistant and low permeability to water vapour, said copolymer consisting essentially of (i) vinylidene chloride, (ii) vinyl chloride, (iii) 2-ethylhexyl acrylate and (iv) acrylic acid, the proportion of vinylidene chloride being from 65 to 90 parts by weight, the proportion of 2-ethylhexyl acrylate being from 2 to 15 parts by weight and the proportion of acrylic acid being from 0.2 to 8 parts by weight, per hundred parts by weight of total vinylidene chloride and vinyl chloride.
Claim 13
Dependent Claim
101 words
An aqueous latex of a copolymer capable of forming stable films which have excellent protection properties on metallic substrates, said films having good chemical resistant and low permeability to water vapour, said copolymer consisting essentially of (i) vinylidene chloride, (ii) vinyl chloride, (iii) 2-ethylhexyl acrylate and (iv) acrylic acid, the proportion of vinylidene chloride being from 65 to 90 parts by weight, the proportion of 2-ethylhexyl acrylate being from 2 to 15 parts by weight and the proportion of acrylic acid being from 0.2 to 8 parts by weight, per hundred parts by weight of total vinylidene chloride and vinyl chloride.
Claim 14
Dependent Claim
28 words
A latex according to claim 1 wherein said aliphatic alpha-beta-unsaturated carboxylic acids are selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid and citraconic acid.
References Cited (Backward Citations)
GB605517A
Cited
US2570478A
Cited
GB761838A
Cited
US2829069A
Cited
US3226370A
Cited
US3468703A
Cited
US3706722A
Cited
US3714106A
Cited
US3696082A
Cited
US3787232A
Cited
US3804814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-26 | 1986-01-25 | 1986-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-26 | 1990-01-25 | 1990-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-26 | 1994-01-25 | 1994-07-27 | $7700.00 | Window Closed / Lapsed |