US3940359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soil-repellent coating compositions
Assignee: EIDP Inc
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Filing: 1974-05-08
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Granted: 1976-02-24
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Expires: 1994-05-08
Abstract
Abstract Aqueous dispersions are disclosed containing up to 50% of particulate solids having a particle size less than 1μ and consisting essentially of A. 4 parts by weight of particles of hydrous metal oxides such as silica, alumina or aluminum-modified silica, and B. from 1 to 16 parts by weight of particles of a polymer containing from 0.5% to 92% by weight of --CF 3 groups, and preferably having a Knoop hardness of at least 5. The dispersions can be used to coat fabrics, painted surfaces and the like to enhance soil repellancy.
Inventors
- 👤 William John Chambers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:43
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/277; C; C08; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K3/34; C08K3/36; C09; C09D; C09D133/00; C09D133/04; C09D133/14; C09D133/16; D06M11/00; D06M11/32; D06M11/36; D06M11/45; D06M11/77; D06M11/79; C08L; C08L2205/00; C08L2205/14; C08L2205/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
103 words
An aqueous dispersion containing a dispersant and 0.5% to 50% by weight of solid particles having a size less than 1μ, said particles consisting essentially of a. 4 parts by weight of hydrous metal oxide particles, b. from 1 to 16 parts by weight of polymer particles containing --CF 3 groups in an amount of from 0.5% to 92% by weight of said polymer, said polymer being a polymer of acrylic or methacrylic acid esterified with a fluorinated alcohol containing 2 to 12 carbon atoms and 1 to 3 --CF 3 groups, and having a Knoop hardness in bulk of at least 5.
Claim 2
Dependent Claim
103 words
An aqueous dispersion containing a dispersant and 0.5% to 50% by weight of solid particles having a size less than 1μ, said particles consisting essentially of a. 4 parts by weight of hydrous metal oxide particles, b. from 1 to 16 parts by weight of polymer particles containing --CF 3 groups in an amount of from 0.5% to 92% by weight of said polymer, said polymer being a polymer of acrylic or methacrylic acid esterified with a fluorinated alcohol containing 2 to 12 carbon atoms and 1 to 3 --CF 3 groups, and having a Knoop hardness in bulk of at least 5.
Claim 3
Dependent Claim
21 words
Composition of claim 1 wherein said hydrous metal oxide is selected from the group consisting of silica, alumina and aluminum-modified silica.
Claim 4
Dependent Claim
20 words
Composition of claim 2 wherein said polymer contains from about 3% to about 60% by weight of --CF 3 groups.
Claim 5
Dependent Claim
14 words
Composition of claim 3 wherein said polymer is a polymer of 1,1,1,3,3,3-hexafluoroisopropyl methyl methacrylate.
Claim 6
Dependent Claim
10 words
Composition of claim 4 wherein said polymer is a homopolymer.
Claim 7
Dependent Claim
13 words
Composition of claim 3 wherein said polymer is a polymer of 2,2,2-trifluorethyl methacrylate.
Claim 8
Dependent Claim
38 words
Composition of claim 3 wherein said polymer is a polymer of a monomer CF 3 CF 2 (CF 2 CF 2 ) n CH 2 CH 2 OCOC(CH 3 )=CH 2 wherein n is from 1 to 5.
Claim 9
Dependent Claim
8 words
Composition of claim 7 wherein n is 3.
References Cited (Backward Citations)
US2549935A
Cited
US2592147A
Cited
US2562117A
Cited
US2991277A
Cited
US3102103A
Cited
US3356628A
Cited
US3489595A
Cited
US3655604A
Cited
US3645989A
Cited
US3684755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |