http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1406737-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B16-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B24-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B28-26 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B16-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B28-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B39-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B38-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B24-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C01B33-32 |
| filingDate | 1973-03-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1975-09-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1406737-A |
| titleOfInvention | Production of silicate mouldings |
| abstract | 1406737 Silicate foam BAYER AG 7 March 1973 [7 March 1972] 10963/73 Heading C1A [Also in Division C3] A process for the production of a foam comprises mixing an aqueous silicate solution with an expanding agent, converting the resulting mixture into a gel containing the expanding agent, and foaming the resultant gel by heating to a temperature of 90-220‹ C. Suitable aqueous inorganic silicate solutions are ammonium or alkali metal silicate solutions (e.g. water glass) and silica sols. containing alkali metal hydroxides or carbonates. The gelation may be achieved by concentrating the silicate solution by evaporating water or adding more silicate so that it solidifies to form a solid gel at low temperatures. Preferably the gelation is induced by adding a gelling agent. Numerous examples of gelling agents are provided, e.g. in specific examples: ethyl dimethyl phosphate, diethyl carbonate, isophthalic acid-dicarbonic acid ethylic ester anhydride, sodium silicofluoride, phosphorous thiochloride, dimethyl sulphate, chloroformic acid ethyl ester, benzoyl chloride, dimethyl maleate, sym. phthaloyl chloride, methyl hexahydrophthalic acid anhydride, ethyl chloroacetate, glycol diacetate, dimethyl carbamide chloride, tosyl chloride, dimethyl sulphoxide, vinyl acetate, glycerine triacetate, and ethyleneglycol dichloroformate. The composition may also contain fillers and diluents of which many examples are specified. The diluent may also serve as the expanding agent if sufficiently volatile. Other suitable expanding agents which decompose to liberate gases are disclosed. Heating may be carried out by applying high frequency microwaves, by infrared radiation, in a heating bath, by heating with steam or by hot air. Heating may be accompanied or followed by treatment with gases such as CO 2 , HCl, SO 2 or polymerizable monomers such as styrene, acrylic esters and acrylic acid. Foaming can be carried after pouring the gelling mixture into moulds, and webs, and woven fabrics may be foamed simultaneously with the silicate gels. The specific examples disclose foamable compositions comprising: (a) sodium silicate and 2À5-19% by weight asbestos fibres, based on the sodium silicate and asbestos; (b) sodium silicate, 5À2% by weight glass fibres and 15À8% by weight chalk; (c) sodium silicate, 1À2% by weight asbestos, 16À5% by weight chalk and 16À5% by weight polystyrene; (d) sodium silicate and 3À6% by weight polyester fibres; and (e) potassium silicate and 19À4% by weight asbestos fibres. |
| priorityDate | 1972-03-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 72.