http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1206160-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1374dd16777534b65ad4422333245af8 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2375-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2201-0502 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-249978 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S428-904 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06N3-142 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D06N3-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-28 |
| filingDate | 1967-11-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1970-09-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1206160-A |
| titleOfInvention | Process for the production of vapour permeable microporous structures and structures obtained by the process |
| abstract | 1,206,160. Microporous laminates. TEIJIN Ltd. 7 Nov., 1967 [7 Nov., 1966], No. 50680/67. Heading B5N. [Also in Divisions B2 and C3] A mioroporous film is obtained by coating a substrate with a dispersion not containing a foam-generating agent and obtained by mixing (a) a slurry of a polyurethane in a partial solvent having a boiling point not above 120 C. and being incapable of dissolving more than its own weight of water with (b) an aqueous latex of a polymer swellable by but not completely soluble in the said partial solvent so that the water content of the dispersion is at least at saturation point with respect to the partial solvent, evaporating the solvent selectively from the coated layer, by using an atmosphere having a relative humidity not above 90% and a temperature (i) not above 80 C., (ii) at least 20 C. below the boiling point of the solvent or any of its constituents and (iii) not lower than the freezing-point of said solvent (preferably not below 10 C.), until at least the gelation point of the dispersion is reached, drying and stripping the film from the support. Reactants for the preparation of the polyurethane are specified. The partial solvent may be methyl ethyl ketone, diethyl ketone, methyl isobutyl ketone, methyl, ethyl or butyl acetate, 1,1- or 1,2-dichloroethane. The aqueous latex may comprise polyacrylic ester, copolymers of acrylic ester and vinyl acetate, acrylonitrilebutadiene copolymers, styrene-butadiene copolymers, polyvinyl acetate or polyvinyl chloride; in examples an acrylonitrile-butadiene rubber polyvinyl-chloride mixture, or a copolymer of acrylic esters is used. Certain specified additives may be present to decrease the solubility of polyurethane in the slurry and to enhance the miscibility with water of the slurry. Preferably, the undissolved portion of the polyurethane in slurry (a) is not less than 20%. The aqueous latex may have a polymer concentration of 5-40% and may be added in amount 50-250% by weight based on polymer in the slurry (a). The total polymer concentration of the dispersion may be 5-25%. The dispersion may contain dyes, pigments, crosslinking agents, stabilizers and fillers, and staple fibres, e.g. polyamides. The support may be glass sheets, metal foils or sheets, silicon paper or polyester film. Coating may be by dipping, knife-coating, casting or spraying. Curing may be carried out, e.g. at 100-160 C. for 3-20 minutes, after drying at 50-120 C. for 5-10 minutes. In Example (15) a film obtained after applying to a polyester support a dispersion of polyurethane, polyvinyl chloride latex, nitrile butadiene rubber latex and polyamide staple fibres, is laminated to a non-woven fabric. In Examples (10) and (13) such a dispersion without staple fibres is knife-coated on to a strippable polyester film and then woven polyamide fabric or a sheet made from polyurethane and polyester filaments is applied on to the coating and solvent evaporated before removal of the film. |
| priorityDate | 1966-11-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 42.