http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0187905-B1
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F285-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F257-02 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F285-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F257-02 |
| filingDate | 1985-10-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1990-07-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1990-07-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0187905-B1 |
| titleOfInvention | Styrene-butadiene graft copolymer latex and heat-vulcanisable composition containing this latex as a reinforcing agent for the production of latex foam |
| abstract | 1. A styrene/butadiene graft copolymer latex obtained by emulsion polymerization in the presence of 1 to 6% by weight of a conventional fat soap and/or resin soap as emulsifier and >= 0.3% by weight of a conventional molecular weight regulator for the polymer, each percentage being based on the total monomers, and characterized by the following features : a) the emulsion polymerization is carried out by a semi-continuous emulsion-feed process ; b) the graft copolymer is composed of 35 to 65% by weight of the graft base (A) which in turn is composed of the graft base (A1) and the grafted-on component (A1), and 35 to 65% by weight of component (B) grafted on in the final step ; c) the graft base (A) is obtained in two polymerization steps ; in the first step, a polystyrene nucleating latex is obtained whose solid (A1) is 1 to 20% by weight, based on the graft copolymer ; the component (A2) of the graft base (A), which is grafted on in the second step, is composed of 86 to 95% by weight of repeating units which are obtained by polymerization of styrene, and 5 to 14% by weight of repeating units which are obtained by polymerization of 1,3-butadiene ; feeding of the emulsifier during grafting being accompanied by intensive stirring in order to avoid the formation of new particles ; d) the component (B) of the graft copolymer, which is grafted on in the final step, is composed of 62 to 70% by weight of repeating units which are obtained by polymerization of styrene, and 30 to 38% by weight of repeating units which are obtained by polymerization of 1,3-butadiene ; feeding of the emulsifier during grafting being accompanied by intensive stirring in order to avoid the formation of new particles : e) the parameters in the preparation of the graft copolymer latex are selected such that the latex particles have an average diameter, determined by surface titration, of 120 to 300 nm. |
| priorityDate | 1984-12-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.