http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1844088-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1a55d1f45fc9fa78dc389b3d7d9a5fc2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G77-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G77-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-5415 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-54 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F7-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G77-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G77-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-54 |
| filingDate | 2005-12-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ab6d1392d46493c800693b1aedfc432a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_64e10838e46bf879221b26d77aac496e |
| publicationDate | 2007-10-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1844088-A1 |
| titleOfInvention | Method of preparing polyorganosiloxane with functional groups in the presence of lithium silanolate |
| abstract | The invention relates to a method of preparing polyorganosiloxane containing at least one functional group in the structure thereof. The inventive method consists in reacting a polyorganosiloxane containing at least one hydroxyl group in the structure thereof with, using a silanol motif, at least one mole of a polyalkoxysilane having formula (R1)a(R2)bSi (OR3)4-(a+b) (I). R1 represents an alkyl radical, a cycloalkyl radical, an aryl radical. R2 represents a group -(Z)m-(X)n, wherein m = 0 or 1, n = 1 or 2, Z represents a divalent hydrocarbon residue, X represents an unsaturated hydrocarbon radical when m = 0 and, when m = 1, X represents a residue selected from those having formula: atom of chlorine, bromine or iodine, -O-CO-CR4=CR5R6 (in which R4, R5 and R6 each represent a hydrogen atom, an alkyl radical and/or a phenyl radical), -RF (in which RF represents a perfluorinated residue), -NHR7 (in which R7 represents a hydrogen atom, an alkyl radical, a radical -R8-NH2, wherein R8 represents Z), -SH. R3 represents an alkyl radical. Moreover, a = 0, 1, 2 or 3, b = 0 or 1 and a+b = 0, 1, 2 or 3, with the additional condition that the sum a+b = 3, symbol b cannot be equal to 0. The aforementioned method is performed in the presence of an effective quantity of a catalyst based on a derivative of lithium and is characterised in that: (i) the catalyst is a lithium organosilanolate having formula (R1)a(R2)b(OR3)3-(a+b)SiO-Li+ (II), wherein R1, R2, R3, a and b have the meanings indicated above; and (ii) the method is conducted in the absence of an aliphatic alcohol having formula R3OH which is added to the reaction medium. |
| priorityDate | 2004-12-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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