US3640753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of poromeric materials
Assignee: BASF SE
•
Filing: 1969-10-31
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Granted: 1972-02-08
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Expires: 1989-10-31
Abstract
Abstract The process of making poromeric materials which comprises impregnating webs of fibrous material with aqueous liquids containing olefinically unsaturated monomers which can be polymerized using redox catalysts, and, if desired, high polymeric plastics in dissolved, emulsified or dispersed form, freezing the webs of fibrous materials impregnated with the aqueous liquids, polymerizing the monomers using redox catalysts and thawing out and separating out the water and any residual monomer from the resulting poromeric materials. These poromeric materials are suitable as floor coverings, insulating materials, leather substitutes and coating materials.
Inventors
- 👤 Carl Heinrich Krauch
- 👤 Axel Sanner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:53
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; D; D06; D06M; D06M14/00; C08J2357/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
39 words
A process as in claim 1 wherein the aqueous liquids additionally contain C. high polymeric plastics which are dispersible or soluble in water, in an amount of from 0.1 to 50 percent by weight based on the aqueous liquid.
Claim 2
Dependent Claim
146 words
A process for the manufacture of poromeric materials which comprises impregnating webs of fibrous material with aqueous liquids containing monoolefinically unsaturated monomers which can be polymerized with redox catalysts, in an amount of from 0.1 to 30 percent by weight based on the aqueous liquid, and high polymeric plastics which are dispersible or soluble in water, in an amount of from 0.1 to 50 percent by weight based on the aqueous liquid in dissolved, emulsified or dispersed form, cooling the webs of fibrous material impregnated with the said aqueous liquids to temperatures at which the said liquids undergo at least partial solidification, polymerizing the unsaturated monomers using redox catalysts, at least one component of which is not added until after the said liquids have undergone complete or partial crystalline solidification, thawing out and separating the water and any residual unsaturated monomers from the resulting poromeric materials.
Claim 3
Dependent Claim
27 words
A process as in claim 1 wherein the monoolefinically unsaturated monomers are acrylic or methacrylic esters of alcohols having one to eight carbon atoms, acrylamides or methacrylamides.
Claim 4
Dependent Claim
76 words
A process as in claim 1 wherein the polyolefinically unsaturated monomers are those having the general formula X-R-Y where X and Y are vinyl, allyl, acryloyl or methacryloyl radicals and R is -O-, -NH-, a bivalent radical of an aliphatic or aromatic dicarboxylic acid having four to eight carbon atoms, a bivalent radical of a glycol having two to 10 carbon atoms or a bivalent radical of an aliphatic diamine having two to six carbon atoms.
Claim 5
Dependent Claim
60 words
A process as in claim 1 wherein the high polymeric plastics are in aqueous dispersion and are selected from the group consisting of homopolymers and copolymers of acrylic esters of alcohols having one to eight carbon atoms, of methacrylic esters of alcohols having one to eight carbon atoms, of acrylamides, of methacrylamides and of mixtures of said homopolymers and copolymers.
Claim 6
Dependent Claim
25 words
A process as in claim 3 wherein the monomers are acrylic or methacrylic esters of alcohols having one to eight carbon atoms, acrylamides or methacrylamides.
Claim 7
Dependent Claim
60 words
A process as in claim 3 wherein the high polymeric plastics are in aqueous dispersion and are selected from the group consisting of homopolymers and copolymers of acrylic esters of alcohols having one to eight carbon atoms, of methacrylic esters of alcohols having one to eight carbon atoms, of acrylamides, of methacrylamides and of mixtures of said homopolymers and copolymers.
Claim 8
Dependent Claim
27 words
A process as in claim 1 wherein said impregnated web is in the form of a flat structure having a thickness of about 0.5 to 20 mm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |