http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-663841-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b30d807376962224a66aa244d678104a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F222-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F210-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F212-08 |
| filingDate | 1947-12-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1951-12-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-663841-A |
| titleOfInvention | Improvements in or relating to artificial resins and processes of making the same |
| abstract | Copolymers are prepared by mass polymerizing by heating a compound having the formula R-CH=CH2, where R is a phenyl or substituted phenyl radical, and a secondary alkyl half ester of an ethylene a ,b -dicarboxylic acid. Suitable vinyl compounds include styrene and nuclear halogen and methyl substituted styrenes, e.g. p-chloro- and p-methyl-styrenes. The alkyl groups of the esters preferably contain 3 to 8 carbon atoms and specified esters are isopropyl, sec.-butyl, methyl isoamyl and sec.-octyl half-esters of maleic, fumaric, citraconic, and phenyl, ethyl and benzyl maleic acids. The half esters may be used in the crude state and may be mixed and contain free acid. Polymerization is effected in the presence of a peroxy catalyst by heating at 60-70 DEG C. and finally at 125 DEG C. A small proportion of b -nitrostyrene may be incorporated as described in Specification 650,838 to obtain polymers of lower molecular weight. The products which are hard, colourless resins, form alkali solutions which are useful as sizes or paper coatings. Improved water resistance is obtained by drying at elevated temperatures or in the presence of materials capable of reacting with the carboxyl groups, e.g. calcium carbonate, polyethylene amine, polyglycols, polyvinyl alcohol and melamine-formaldehyde resins. The copolymers are soluble in nitrocellulose lacquer solvents such as ethyl-butyl acetate, glycol ethyl ether, toluene, ethyl or butyl alcohols and butanol-xylol and butanol-petroleum mixtures; and examples are given of compositions with (1) nitrocellulose, (2) polyvinyl butyral, and (3) Manila copal. On baking with polyvinyl butyral the polymers mutually react forming an insoluble film resistant to softening by heat. Plasticizers such as oleic and ricinoleic acid soaps, diglycol ricinoleate, glyceryl mono-oleate, dibutyl sebacate and the phthalic ester of diethylene glycol monoethyl ether and pigments such as clay or ground limestone may be added to the polymer compositions. Specification 588,725 also is referred to. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2798062-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2717247-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3331886-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1396576-A1 |
| priorityDate | 1946-12-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 61.