http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-19801101-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F212-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F236-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F236-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F212-08 |
| filingDate | 1998-01-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bf4c31eea195c14a78570a7e00471444 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c2e6d4e755a8fc6472110b33e8db8189 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_511597e157a9c8d12096f76d8945b18c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f075c7a40155895b6be6728a0200b93c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3f2c83e0334e7579d9ebacb432be4315 |
| publicationDate | 1999-07-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-19801101-A1 |
| titleOfInvention | Process for the preparation of styrene-butadiene random copolymers |
| abstract | Production of random copolymers from monomers S and B by anionic polymerization comprises: (a) using a mixture containing monomers S and B in given initial concentrations; (b) bringing this mixture into contact with the polymerization initiator I or a growing polymer chain PBI or PSI; and (c) adding the remainder of monomer B at a rate determined by repeated solution of given differential equations. Production of random copolymers from monomers S and B by anionic polymerization with a polymerization initiator comprises: (a) using a mixture containing monomers S and B in initial concentrations (S)0 and (B)0 given by equation (1); (b) initiating copolymerization by bringing this mixture into contact with the polymerization initiator I or a growing polymer chain PBI or PSI; and (c) adding the remainder of monomer B at a rate rz for time t given by repeated solution of differential equations (2) to (6); -dB/dt = -rz .(B)z + (kSB/V) . PSI . B + (kBB/V) . PBI . B (2) -dS/dt = (kBS/V) . PBI . S + (kSS/V) . PSI . S (3) -dPBI/dt = (kBS/V) . PBI . S - (kSB/V) . PSI .B (4) -dPSI/dt = (kSB/V) . PSI . B - (kBS/V) . PBI .S (5) -dV/dt = -rz - (1/ rho s - 1/ rho p) Ms . dS/dt - (1/ rho B - 1/ rho p) MB . dB/dt (6) s = the required fraction of monomer B in the copolymer in mol.%; kBB = the reaction velocity constant for addition of monomer B to the growing polymer chain PBI with a monomer B as last added monomer; kSS = the reaction velocity constant for addition of monomer S to the growing polymer chain PSI with a monomer S as last added monomer; kSB = the reaction velocity constant for addition of monomer B to the growing polymer chain PSI with a monomer S as last added monomer; kBS = the reaction velocity constant for addition of monomer S to the growing polymer chain PBI with a monomer B as last added monomer; V = the volume of polymerization mixture at the particular moment; (B)z = the concentration of monomer B in the feed; rho S, rho B = the density of monomers S and B; rho P = the density of the copolymer; MS, MB = the molar weight of monomers S and B; S, B = the amounts of S and B under conditions (7); d(B)/dt = (b/s) . d(S)/dt (7) Independent claims are also included for (a) the production of block or 3-block copolymers with a random copolymer block S/B produced by this process; and (b) copolymers produced by this process. |
| priorityDate | 1998-01-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 55.