http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1294711-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/Y10S428-904 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2375-04 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-4833 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L75-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06N3-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-4009 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L75-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D06N3-14 |
| filingDate | 1970-01-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1972-11-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1294711-A |
| titleOfInvention | Process for the production of microporous structures |
| abstract | 1294711 Laminates TEIJIN Ltd 30 Jan 1970 [31 Jan 1969] 4725/70 Heading B5N [Also in Divisions B1 and C3] Laminates may be produced using as one layer a microporous structure prepared by (a) forming a solution or suspension of a resinous component in an organic solvent having a b.p. lower than 120 C., the solubility of water in the solvent being less than 50 g./100 g. of solvent, whose resin content (as solids) is 8 to 30% by weight, the resinous component comprising more than 70% by weight of a polyurethane elastomer consisting of (A) 100 to 10% by weight of a polyurethane elastomer derived from (i) a water-insoluble hydroxyl-terminated polyester or polyether diol of M.W. 500 to 4000, (ii) an organic diisocyanate, (iii) a difunctional active hydrogen compound of M.W. 62 to 250, and (iv) a polyoxyethylene compound of M.W. 500 to 4000 containing 1 or 2 active hydrogen atoms at the terminal radicals, the polyurethane containing, as hydrophilic segments, polyoxyethylene segments alone in an amount of 2 to 25% by weight and (B) 0 to 90% by weight of a polyurethane elastomer derived from the compounds (i), (ii) and (iii); (b) mixing the solution or suspension with an amount of water ranging from 50 to 600% by weight based on the resinous component and exceeding the solubility of water in the organic solvent, to prepare a dispersion; (c) coating or impregnating a substrate with the dispersion; (d) selectively evaporating the solvent from the product at a temperature not higher than 80 C. and at least 10 C. lower than the boiling point of the lowest boiling constituent of the organic solvent, to gel the resinous component; and (e) drying the product. Preferred solvents are methyl ethyl ketone, diethyl ketone, methyl acetate and admixtures of tetrahydrofuran with, for example, methyl isobutyl ketone, toluene or ethyl acetate. Conventional polyesters, polyethers and diisocyanates are used to form the polyurethane. Preferred chain extending agents are aliphatic glycols of 2 to 10 carbon atoms. The polyoxyethylene compound may be polyoxyethylene glycol, mono-esters and ethers thereof, aminopolyoxyethylenes, water-soluble polyethers containing oxyethylene groups and other oxyalkylene groups and polyesters modified with polyoxyethylene segments. The substrate may be a woven or knitted fabric, a non-woven fabric or, if the product is to be stripped from the substrate, a plastic film, silicon paper, glass sheets or metal sheets. The dispersion may contain staple fibres, e.g. rayon, nylon, acetate, acrylic, polyvinyl chloride or polyester fibres. In Example 6 a substrate which is a non-woven fabric composed of polyethylene terephthalate staple fibres is impregnated with a dispersion as described above, the solvent is selectively evaporated, the resulting sheet dried, the surface buffed using sand paper and a microporous sheet which had been prepared as above but was stripped from its substrate was applied to the surface. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2143836-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4510186-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4853418-A |
| priorityDate | 1969-01-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 51.