http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-975334-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_445a797690bdb3709f7c1a0a64853ba2 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2325-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S264-17 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2325-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S264-07 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-236 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J5-124 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J5-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-236 |
| filingDate | 1961-12-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9695a1fd8508a223baf327b627c5d24f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6352d6b78a74680b5dd57ecaee51cee6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9a1ea060ada3eeb130f71f40d0eddd96 |
| publicationDate | 1964-11-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-975334-A |
| titleOfInvention | Improvements relating to cellular polystyrene materials |
| abstract | A rigid cellular material consisting of polystyrene is made by expanding bodies of a polystyrene composition and bonding these together by means of a non-cellular bonding agent, wherein the bonding agent sets sufficiently slowly to allow preferential accumulation of the bonding agent at the points of contact of the expanded polystyrene beads. Such a bonding agent may be a non-foaming liquid polyurethane-forming composition. A secondary bonding agent such as a latex binder, a liquid mixture of plaster and water or cement and water or a liquid polyurethane rubber (each exemplified) may be used to treat the bonded polystyrene material. The weight ratio of expanded bodies to bonding agent may be 7:1 to 1:10 (respectively) but preferably 3:1 to 1:5. The polystyrene bodies which may be derived from a thermally-expandable composition containing pentanes, may be intimately mixed with bonding agent in a mixer. Specific embodiments disclose moulded articles e.g. bricks, in which non-adhering materials (specified) may be used to line the mould, another embodiment is a plywood-foam laminate. The polystyrene beads used may be twice expanded. Additives to the latex binder include potassium oleate, sulphur, zinc diethyl dithiocarbamate, zinc mercaptobenzthiazole, zinc oxide, N,N1-di-b -naphthyl-p-phenylene diamine, sodium silicofluoride, zinc oxide, casein, potassium hydroxide and whiting. If a polyurethane-forming composition is used then the beads of polystyrene may be moistened with water to obtain faster bonding. If a liquid polyurethane rubber is used as a secondary bonding agent, then trimethylol-propane may be added. The non-forming liquid polyurethane-forming composition which may be used as a bonding agent, is a mixture of one or more organic compounds having at least 2 -NCX radicals (X=O or S) e.g. tolylene diisocyanate or diphenylene methane diisocyanate, and one or more organic compound having at least 2 active hydrogens e.g. polypropylene glycol triol or polyether tetrol derived from polypropylene oxide, ethylene diamine and ethylene oxide; this mixture may be catalysed by stannous octoate. |
| priorityDate | 1961-12-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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