11-07-2013 дата публикации
Номер: US20130178588A1
Composite polymerization initators are disclosed suitable to prepare polymer brush composites. 1. A composite polymerization initiator comprising groups of formula (1) covalently anchored to the surface of a solid substrate:{'br': None, 'sub': n', '2', 'B1', '2, '-(L)-CR—B(R)\u2003\u2003(1)'}{'sub': 1', '15', 'B1', '1', '20', '5', '10', 'B1', 'B1', '2, 'wherein L is a linker group, n is equal to 0 or 1; each R is independently selected from the group consisting of hydrogen, C-Clinear or branched alkyl group, optionally comprising heteroatoms; and wherein each Ris independently selected from the group consisting of hydrogen, C-Clinear, branched or cyclic alkyl group, C-Caromatic group, optionally fluorinated; each group Rmay be comprised in an, optionally substituted, aliphatic or aromatic cyclic structure; and wherein said —B(R)may be an aliphatic bicyclic borane radical wherein both boron-carbon bonds are part of a cyclic structure.'}2. A method for the preparation of the composite initiator of comprising the steps of: (a) providing a solid substrate comprising surface reactive groups GSR; said{'sub': 2', 'B1', '2', '2', 'B1', '2', 'B1', '2', 'B2', 'B1', 'B2', '1', '5, 'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, '(b) reacting the solid substrate with a compound comprising one functional group X capable of forming a covalent bond with the substrate surface by reaction with the surface reactive groups GSR, and at least one functional group either comprising a moiety of formula —CR—B(R)or capable of forming a moiety —CR—B(R)by reaction with an organoborane of formula B(R)R, wherein R and Rare as defined in and Ris selected from the group consisting of hydrogen, halogen, said C-Clinear or branched alkyl.'}3. The method according to comprising the step of reacting the solid substrate with a linker compound of formula X-(L′)-Ycomprising one functional group [X] capable of forming a covalent bond with the substrate surface by reaction with the surface reactive groups ...
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