US4039492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic fiber water base surface coating composition
Assignee: Hamilton Materials Inc
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Filing: 1975-11-26
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Granted: 1977-08-02
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Expires: 1995-11-26
Abstract
Abstract There is disclosed a class of asbestos-free, surface coating compositions useful for finishing of interior building walls or ceilings constructed with wallboard and the like, the so called dry wall construction. The compositions contain, as a substitute for the commonly employed asbestos fibers, a synthetic fiber which is a water-dispersible, thermoplastic polyolefin prepared by solution polymerization with a coordination catalyst and precipitated from the solution under high shear forces. The synthetic fibers can be surface modified by treatment with hydrophilic colloids such as starch or polyvinyl acetate or can bear carboxyl or sulfonate groups to improve their water dispersibility. The fibers are commercially available under the designation SWP from the Crown Zellerbach Company, Camas, Washington. The invention also includes a method for preparation of surface coating compositions including the steps of milling of the water dispersible polyolefin fibers, blending of the fibers into surface coating compositions as a substitute for asbestos fibers therein and remilling of the blended compositions or, alternatively, milling and drying of the synthetic, water-dispersible polyolefin fibers prior to blending of the fibers into the compositions.
Inventors
- 👤 Willis D. Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:33
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/02; C09D5/024; C09D5/028; C04; C04B; C04B16/00; C04B16/04; C04B16/06; C04B16/0616; C04B16/0625; C04B26/00; C04B26/02; C04B2111/00; C04B2111/00474; C04B2111/00482
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
89 words
A composition for blending with water to form a surface coating composition which comprises from 1 to about 15 weight percent of a water-dispersible binder, from 40 to about 95 weight percent of a finely subdivided particulate filler and from 0.5 to about 20 weight percent of a fibrous filler consisting of a water-dispersible, linear, high molecular weight polyolefin having a surface area between about 1.0 and 100 square meters per gram, a fiber diameter from about 20 to 400 microns and length from about 0.05 to 10 millimeters.
Claim 2
Dependent Claim
89 words
A composition for blending with water to form a surface coating composition which comprises from 1 to about 15 weight percent of a water-dispersible binder, from 40 to about 95 weight percent of a finely subdivided particulate filler and from 0.5 to about 20 weight percent of a fibrous filler consisting of a water-dispersible, linear, high molecular weight polyolefin having a surface area between about 1.0 and 100 square meters per gram, a fiber diameter from about 20 to 400 microns and length from about 0.05 to 10 millimeters.
Claim 3
Dependent Claim
16 words
The composition of claim 1 including from 0.5 to about 15 weight percent of a pigment.
Claim 4
Dependent Claim
23 words
The composition of claim 1 including from 0.1 to about 10 weight percent of a thickening agent comprising a water-dispersible polymer or gum.
Claim 5
Dependent Claim
27 words
The composition of claim 3 wherein said thickening agent is a cellulose derivative selected from the class of hydroxymethyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose and salts thereof.
Claim 6
Dependent Claim
25 words
The composition of claim 3 wherein said thickening agent is a gum selected from a class of gum trigacin, xanthan gum and locust bean gum.
Claim 7
Dependent Claim
18 words
The composition of claim 1 also including a working additive selected from the class of mica and clay.
Claim 8
Dependent Claim
17 words
The composition of claim 1 wherein said water soluble binder is an aqueous emulsion of polyvinyl acetate.
Claim 9
Dependent Claim
16 words
The composition of claim 1 wherein said binder is an aqueous suspension of a proteinaceous material.
Claim 10
Dependent Claim
18 words
The composition of claim 1 wherein said particulate filler is calcium carbonate, calcium magnesium carbonate or calcium sulfate.
Claim 11
Independent Claim
109 words
The method for preparing a powder mixture for admixing with water to provide an asbestos-free, surface coating composition which comprises forming an intimate mixture by blending together the following ingredients: from 1 to about 15 weight percent of a water-dispersible binder; from 40 to about 95 weight percent of a finely subdivided particulate filler; and from 0.5 to about 20 weight percent of a fibrous additive consisting of a water-dispersible, linear, high molecular weight polyolefin having a surface area between about 1.0 and 100 square meters per gram, a fibrous structure with a fiber diameter from 20 to about 400 microns and length from about 0.05 to 10 millimeters.
Claim 12
Independent Claim
109 words
The method for preparing a powder mixture for admixing with water to provide an asbestos-free, surface coating composition which comprises forming an intimate mixture by blending together the following ingredients: from 1 to about 15 weight percent of a water-dispersible binder; from 40 to about 95 weight percent of a finely subdivided particulate filler; and from 0.5 to about 20 weight percent of a fibrous additive consisting of a water-dispersible, linear, high molecular weight polyolefin having a surface area between about 1.0 and 100 square meters per gram, a fibrous structure with a fiber diameter from 20 to about 400 microns and length from about 0.05 to 10 millimeters.
Claim 13
Dependent Claim
57 words
The method of claim 10 including the step of adding from 0.1 to about 10 weight percent of mica, attapulgite or montmorillonite clay, natural gum, or cellulose derivative to said powder mixture and adjusting the amount so added to a level to provide the desired workability time to surface coatings obtained from surface coating compositions obained therefrom.
Claim 14
Dependent Claim
27 words
The method of claim 10 including drying said fibrous additive to a moisture content less than about 10 weight percent before incorporating it in said powder mixture.
Claim 15
Dependent Claim
17 words
The method of claim 10 including the step of milling said powder mixture to subdivide agglomerates therein.
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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) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |