http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1022863-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2110-0083 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2110-005 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2350-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2110-0025 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2110-0008 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-632 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-638 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-6229 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-4072 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-4063 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-62 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-63 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-40 |
| filingDate | 1963-03-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a8ce5ef4f90c877427de068746f0c275 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7bdfa9d951cedfc2d5c55c2625366501 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8f6db2428c89bf30c89988ae3740b3ef |
| publicationDate | 1966-03-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1022863-A |
| titleOfInvention | Cellular polyurethanes |
| abstract | cellular polyurethane plastics are prepared by reacting, in the presence of a blowing agent, an organic polyisocyanate and a polyhydroxyl compound which has to be prepared by a process including polymerizing a hydroxyalkyl acrylate and/or methacrylate. The hydroxyalkyl acrylates or methacrylates are preferably copolymerized with an ethylenically unsaturated monomer, in the presence of a free-radical-forming catalyst, which is either an organic peroxide or an azo-compound, and the reaction is suitably carried out in an inert organic solvent. A molecular weight regulator, e.g. a chlorinated or unsaturated hydrocarbon, may also be present. Preferred hydroxyalkyl acrylates and methacrylates are those in which the alkyl group contains 2-12 carbon atoms; this may optionally be substituted, for example, with halogen, and the compounds may contain 1-3 hydroxy groups. Monomers that may be used in the copolymerization are preferably aromatic with an ethylenically unsaturated side chain, e.g. styrene, vinyl toluene, x-methylstyrene, and para-chloro-styrene; butyl acryl-ate and acrylonitrile may also be employed. Preferred catalysts are organic peroxides, e.g. cumene-hydroperoxide, but azo compounds such as azoisobutyric acid dinitrile may be used; inert solvents for the copolymerization reaction may be, for example, aromatic solvents, esters, or ether-esters such as ethylene glycol diacetate. For the polyurethane foam preparation, the preferred foaming agent is a halohydrocarbon, such as trichloromonofluoromethane, but alternatively water may be used. Any suitable organic polyisocyanate is employed and the reaction is preferably performed in the presence of catalysts; suitable catalysts are tertiary amines, and tin compounds, both organic, such as stannous carboxylates, and inorganic. The polyhydroxyl acrylate and methacrylate derivatives are advantageously employed in admixture with conventional hydroxyl-containing polymers that are used in polyurethane production, such as hydroxylpolyesters, polyesters, polyhydric polyalkylene ethers, or polyhydric polythioethers. Other appropriate additives may be included in the foaming mixture, such as emulsifiers, colouring agents, fillers, and foam stabilizers. A suitable emulsifier is sulphonated castor-oil, or its sodium salt, and the preferred foam stabilizer is a silicone oil, more particularly a polydimethyl siloxane, or an alkyl-silane-polyoxy-alkylene block copolymer. Examples are given for preparation of the hydroxy alkyl methacrylate copolymers with styrene, butyl acrylate and acrylonitrile, and for the formation of foamed polyurethane products from these. Uses of the foams depend upon their improved resistance to distortion at high temperatures, and their unusually high compressive strength. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1529790-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1939231-A4 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1939231-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1826223-A4 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1826223-A1 |
| priorityDate | 1962-03-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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