http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1262944-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4b665ebe1c4d4e86ccbe20ba9dd4496b |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2201-0502 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-283 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-28 |
| filingDate | 1969-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1972-02-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1262944-A |
| titleOfInvention | Improvements in or relating to microporous sheet materials |
| abstract | 1,262,944. Microporous sheet materials. BRITISH UNITED SHOE MACHINERY CO. Ltd. 15 May, 1969 [17 May, 1968], No. 24832/69. Headings C3C and C3R. Microporous sheets are produced by forming an emulsion composition comprising fine droplets of a liquid dispersed in a continuous phase which comprises reactive material comprising a mixture of a component providing a plurality of -NCO groups and a component providing active hydrogen convertible through reaction to form solidified, resilient polyurethane, the liquid being substantially non-solvent for the reactive material and immiscible in the continuous phase and being present in amount from 25 to 300% by weight based on the weight of the reactive material, causing the reactive material to react at a temperature below the boiling point of the liquid whereby the emulsion gels and solidifies to form a mass, slicing the mass into sheets of a desired thickness after the mass has sufficiently solidified and while the droplets are retained in the material, and, after the material has solidified sufficiently not to collapse upon removal of the droplets of liquid, removing the liquid to leave pores and discontinuities in the solidified material. The polyisocyanate may be in the form of a prepolymer. Suitably the liquid is a liquid aliphatic hydrocarbon including petroleum hydrocarbon fractions and particularly those commercially available as mineral spirits, petroleum naphtha and kerosene, and preferably has a boiling point of at least 100‹ C. Dispersion of the poreforming liquid is effected by vigorous agitation, optionally in the presence of an emulsifying agent. The slicing operation may be carried out using a band knife splitter and preferably after slicing the sheets are heated to complete the cure and remove by evaporation the liquid of the entrapped droplets as the cure is completed. |
| priorityDate | 1968-05-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID425193155 http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID783 |
Total number of triples: 14.