http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-943691-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9e5302e08e56037ff7bc5c9b6fcc29f9 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-4883 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-16 |
| filingDate | 1960-11-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1963-12-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-943691-A |
| titleOfInvention | Improvements in and relating to foamed polymers |
| abstract | A foamed polymer comprises a three-dimensional network of isocyanate modified hydroxypolyalkyleneoxy ethers of glycoside of a monosaccharide, the said polymer containing within the polymer network units having the formula: [=NCO.O(R4O)n]y-S-OR in which R is a monovalent alkyl or alkaryl radical, each R4 is an alkylene radical, S is the organic portion exclusive of reactive hydroxyl groups of a glycoside derived from a simple sugar, y is 3 or 4 and n is a whole number having a value of at least two. The term "glycoside" refers to a mono-saccharide in which an alkyl or aralkyl radical is attached to a carbonyl carbon atom through an oxygen atom. The sugar constituent of the glycoside, corresponding to S in the formula, is derived from a pentose such as xylose, lyxose, arabinose or ribose; a hexose such as glucose, mannose, altrose, talose, galactose, idose, gulose, fructose, allose, psicose, sorbose or tagatose; or a desoxy derivative formed by the replacement of a hydroxyl substituent by hydrogen, such as the desoxyhexoses, rhamnose and frucose. The reaction products of these with alkylene oxides may be formed in the presence of alkaline catalysts and their molecular weights may range from 450 to 1,250 for producing rigid foams, 800 to 1,800 for semi-rigid and 1,800 to 6,000 for flexible open cell foams. The foaming can be effected by the one-shot, semi-prepolymer or prepolymer methods. In prepolymer production retarders such as acids, inorganic or organic halides. Foaming can be effected by means of water or blowing agents such as fluorocarbons in the reaction mixture. As catalysts for the foaming reaction these are specified a number of inorganic and organic bases, arsenic, antimony, bismuth and titanium chlorides bis (cyclopentadrenyl) titanium difluoride, titanium chelates, octyl lead chlorides, acetates or hydroxide, stannous octoate, copper chelates, mercury salts and organotin compounds. As thickening agents for the foams these can be used methoxylated or ethoxylated cellulose, benzyl-, acetyl-, or acetylbutyryl cellulose, hydroxy-ethylated polyvinyl alcohol, vinyl chloride polymers and copolymers, polyvinyl acetate, polyvinyl butyrol, polymeric methyl or butyl methacrylate, polyethylene oxide, bentone and metallic soaps such as aluminium stearate. These may also be added clays, powdered aluminium, diatomaceous earths, dyes, siloxane -oxy-alkylene copolymer. In Example (1) foam is prepared from a propylene oxide addition product of a -methyl-D-glucopyranoside; dibutyltin dilaurate, silicone oil surfactant trichloromonofluoromethane and toluene-2,4 and 2,6-diisocyanates. Starting materials in other, generally similar, examples include the ethylene oxide and mixed ethylene-propylene oxide addition products of a -methyl-D-glucopyranoside, and the propylene oxide addition products of a -ethyl-D-gulactopyranoside, a -methyl-D-xylopyranoside. Specification 892,137 is referred to. |
| priorityDate | 1959-11-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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