http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-692142-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/C08J9-105 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A01N55-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A01N55-02 |
| filingDate | 1950-07-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1953-05-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-692142-A |
| titleOfInvention | Improvements in or relating to the manufacture of expanded thermoplastics |
| abstract | Expanded thermoplastics are obtained by using as the blowing agent a hydrazide of an organic sulphonic acid. The hydrazide preferably has the general formula R-SO2-NH-NH2, where R is alkyl, aralkyl, aryl, cycloalkyl, ar-tetrahydronaphthyl or alkylamine radicals, and the aromatic radicals may be substituted by alkyl, nitro or halogen radicals; or <FORM:0692142/IV (a)/1> where R1 is alkylene, arylene, cycloalkylene or substituted arylene radicals; or R-SO2-NH-NH-R2, where R2 is alkyl, aryl, acyl, alkyl, sulphonyl, and aryl sulphonyl, and R is as above; or R-SO2-NH-N=R3, where R3 is aldehyde or ketone radical and R is as above. Many such hydrazides are specified, preferred compounds are the hydrazides of benzene sulphonic acid, N-acetonyl benzene sulphonic acid, benzene 1,3-disulphonic acid, N-acetyl benzene sulphonic acid, and bis-benzene sulphonic acid; and benzene sulphonic acid N-phenyl hydrazide. The hydrazides decompose at temperatures between 70 DEG and 245 DEG C. In examples such hydrazides are used as blowing agents for mixtures containing butadiene-acrylonitrile, butadiene styrene, polyvinyl chloride, polystyrene and acetyl cellulose and details of the resulting expanded products are given. Uniform pores are produced, and no discoloration is caused. The closed cell material may also be expanded sufficiently far to produce a sponge material.ALSO:Expanded thermoplastics are obtained by using as the blowing agent a hydrazide of an organic sulphonic acid. The hydrazide preferably has the general formula R-SO2-NH-NH2 when R is alkyl, aralkyl, aryl, cycloalkyl, ar-tetrahydronaphthyl or alkylamine radicals, and the aromatic radicals may be substituted by alkyl, nitro or halogen radicals; or <FORM:0692142/V/1> where R1 is alkylene, arylene, cycloalkylene or substituted arylene radicals; or R - SO2-NH-NH-R2 where R2 is alkyl, aryl, acyl, alkyl, sulphonyl, and aryl sulphonyl, and R is as above; or R - SO2-NH-N = R3 where R3 is aldehyde or ketone radical and R is as above. Many such hydrazides are specified preferred compounds are the hydrazides of benzene sulphonic acid, N-acetonyl benzene sulphonic acid, benzene 1, 3 disulphonic acid, N-acetyl benzene sulphonic acid, and bis-benzene sulphonic acid; and benzene sulphonic acid N-phenyl hydrazide. The hydrazides decompose at temperatures between 70 DEG and 245 DEG C. In examples such hydrazides are used as blowing agents for mixtures containing rubber, and details of the resulting expanded products are given. Uniform pores are produced, and no discoloration is caused. The closed all material may also be expanded sufficiently far to produce a sponge material. |
| priorityDate | 1949-04-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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Total number of triples: 27.