US3870557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of porous web structures with aqueous suspensions of a synthetic resin
Assignee: Roehm GmbH Darmstadt
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Filing: 1972-07-07
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Granted: 1975-03-11
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Expires: 1992-07-07
Abstract
Abstract Method of treating porous planar web structures, such as woven and non-woven fabrics, with an aqueous suspension of a soft synthetic resin having a glass transition temperature below 35*C. to produce strengthened and coated webs having good absorbability and air permeability. Web structures made in this way. Aqueous suspensions of a synthetic resin having a glass transition temperature below 35*C.
Inventors
- 👤 Herbert Fink
- 👤 Manfred Munzer
- 👤 Horst Dinklage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:54
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/425; D04H1/4258; D04H1/4326; D04H1/4334; D04H1/435; D04H1/44; D04H1/46; D04H1/48; D04H1/488; D04H1/58; D04H1/587; D04H1/64; D04H1/645; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/227; D06M15/233; D06M15/244; D06M15/263; D06M15/267; D06M15/285; D06M15/327; D06M15/333; D06M17/00; D06M17/04; D06M17/06; D06Q; D06Q1/00; D06Q1/10; Y; Y10; Y10T; Y10T428/00; Y10T428/27; Y10T442/00; Y10T442/20; Y10T442/2139; Y10T442/2344; Y10T442/2352
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
137 words
IN A PROCESS FOR COATING OR STRENGTHENING A POROUS WEB STRUCTURE BY CONTACTING SAID WEB WITH A SYNTHETIC RESIN CONTAINED IN PARTICULATE FORM IN AN AQUEOUS MEDIUM, THE IMPROVEMENT WHEREIN SAID WEB STRUCTURE (1) IS CONTACTED WITH AN AQUEOUS SUSPENSION, PREPARED BY AN AQUEOUS SUSPENSION POLYMERIZATION PROCESS, OF A SYNTHETIC RESIN HAVING A GLASS TRANSITION TEMPERATURE BELOW ABOUT 35*C., THE RESIN PARTICLES IN SAID SUSPENSION HAVING AN AVERAGE PARTICLE DIAMETER BETWEEN ABOUT 0.05 MM AND ABOUT 0.5 MM AND BEING PRESENT IN SAID SUSPENSION IN AN AMOUNT GIVING A SOLIDS CONTENT OF UP TO 70 PERCENT BY WEIGHT, AND (2) IS THEN DRIED AT A TEMPERATURE BETWEEN ABOUT 80*C. AND ABOUT 180*C., THE AMOUNT OF RESIN SUSPENSION EMPLOYED BEING SUCH AS TO LEAVE BETWEEN ABOUT 10G/M2 AND ABOUT 200G/M2 OF RESIN IN SAID WEB STRUCTURE AFTER DRYING.
Claim 2
Dependent Claim
137 words
IN A PROCESS FOR COATING OR STRENGTHENING A POROUS WEB STRUCTURE BY CONTACTING SAID WEB WITH A SYNTHETIC RESIN CONTAINED IN PARTICULATE FORM IN AN AQUEOUS MEDIUM, THE IMPROVEMENT WHEREIN SAID WEB STRUCTURE (1) IS CONTACTED WITH AN AQUEOUS SUSPENSION, PREPARED BY AN AQUEOUS SUSPENSION POLYMERIZATION PROCESS, OF A SYNTHETIC RESIN HAVING A GLASS TRANSITION TEMPERATURE BELOW ABOUT 35*C., THE RESIN PARTICLES IN SAID SUSPENSION HAVING AN AVERAGE PARTICLE DIAMETER BETWEEN ABOUT 0.05 MM AND ABOUT 0.5 MM AND BEING PRESENT IN SAID SUSPENSION IN AN AMOUNT GIVING A SOLIDS CONTENT OF UP TO 70 PERCENT BY WEIGHT, AND (2) IS THEN DRIED AT A TEMPERATURE BETWEEN ABOUT 80*C. AND ABOUT 180*C., THE AMOUNT OF RESIN SUSPENSION EMPLOYED BEING SUCH AS TO LEAVE BETWEEN ABOUT 10G/M2 AND ABOUT 200G/M2 OF RESIN IN SAID WEB STRUCTURE AFTER DRYING.
Claim 3
Dependent Claim
137 words
In a process for coating or strengthening a porous web structure by contacting said web with a synthetic resin contained in particulate form in an aqueous medium, the improvement wherein said web structure (1) is contacted with an aqueous suspension, prepared by an aqueous suspension polymerization process, of a synthetic resin having a glass transition temperature below about 35*C., the resin particles in said suspension having an average particle diameter between about 0.05 mm and about 0.5 mm and being present in said suspension in an amount giving a solids content of up to 70 percent by weight, and (2) is then dried at a temperature between about 80*C. and about 180*C., the amount of resin suspension employed being such as to leave between about 10g/m2 and about 200g/m2 of resin in said web structure after drying.
Claim 4
Dependent Claim
137 words
In a process for coating or strengthening a porous web structure by contacting said web with a synthetic resin contained in particulate form in an aqueous medium, the improvement wherein said web structure (1) is contacted with an aqueous suspension, prepared by an aqueous suspension polymerization process, of a synthetic resin having a glass transition temperature below about 35*C., the resin particles in said suspension having an average particle diameter between about 0.05 mm and about 0.5 mm and being present in said suspension in an amount giving a solids content of up to 70 percent by weight, and (2) is then dried at a temperature between about 80*C. and about 180*C., the amount of resin suspension employed being such as to leave between about 10g/m2 and about 200g/m2 of resin in said web structure after drying.
Claim 5
Dependent Claim
26 words
A process as in claim 1 wherein the suspended resin comprises an alkyl acrylate having from 1 to 18 carbon atoms in the alcohol portion thereof.
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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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |