http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-907363-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2fa8f8941ecc2d9521285617dbb93322 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F283-01 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F283-01 |
| filingDate | 1960-02-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_694e72f78e6f10cc962ffef51d5ecade |
| publicationDate | 1962-10-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-907363-A |
| titleOfInvention | Improvements in or relating to the cure of unsaturated polyester compositions |
| abstract | A catalytic accelerator for curing unsaturated polyester resins comprises a vanadium compound in a liquid acid phosphate ester. Preferred vanadium compounds are vanadium naphthenate, vanadium pentoxide and ammonium vanadate. The acid phosphate esters used may have the formula where R1 represents an alkyl or aryl group and R2 represents an alkyl or aryl group or hydrogen, e.g. dibutyl hydrogen phosphate, diethyl hydrogen phosphate, di-isoctyl hydrogen phosphate, dimethyl hydrogen phosphate and di-nonylhydrogen phosphate. Additionally the catalyst system may contain a peroxidic compound, ethyl acetate, toluene and/or a cobalt compound. Comparative examples are given.ALSO:A process for curing a composition containing an unsaturated polyester comprises mixing the composition with a catalyst system including an organic peroxide compound and a solution of a vanadium compound in a liquid acid phosphate ester. The unsaturated polyester may be obtained by esterifying saturated dihydric alcohols, e.g. ethylene glycol, diethylene glycol, triethylene glycol, trimethylene glycol, a -propylene glycol and 1,3 butylene glycol with unsaturated dicarboxylic acids, e.g. maleic, fumaric, itaconic and citraconic acids. Such esters may be modified by replacement of some of the unsaturated dibasic acids with an equivalent quantity of another dicarboxylic acid, e.g. succinic, adipic, sebacic, phthalic, azelaic, tetrahydrophthalic, endomethylene tetrahydrophthalic or hexachloroendomethylene tetrahydrophthalic acids. Preferably the polyester is cured in the presence of an unsaturated monomer capable of copolymerizing with the unsaturated polyester, e.g. triallyl phosphate, styrene, methyl methacrylate, ethylene glycol, dimethacrylate, ethyl acrylate, acrylonitrile, vinyl acetate, diallyl phthalate, diallyl maleate, triallyl cyanurate and the vinyl phenols. Examples of peroxidic compounds used in curing polyester resins are methyl ethyl ketone peroxide, cyclohexanone peroxide, tertiary butyl hydroperoxide, methyl isobutyl ketone peroxide and cumene hydroperoxide. The source of vanadium compound may be vanadium naphthenate, ammonium vanadate or vanadium pentoxide all of which are soluble in acid phosphate ester solutions. The liquid acid phosphate esters used may be represented by the formula <FORM:0907363/IV(a)/1> where R1 represents an alkyl or aryl group and R2 represents an alkyl or aryl group or hydrogen, e.g. dibutyl hydrogen phosphate, diethyl hydrogen phosphate, di-isooctyl hydrogen phosphate, di-methyl hydrogen phosphate and dinonyl hydrogen phosphate. Additionally the catalyst system may contain ethyl acetate or toluene. Comparative examples are given. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110819265-A |
| priorityDate | 1960-02-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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