发明名称 |
Surfactantless synthesis of amphiphilic cationic block copolymers |
摘要 |
<p>The present invention is directed to a method of producing an amphiphilic block copolymer, including the steps of:
(1) preparing a first aqueous polymerization medium which is comprised of
(a) 4-vinylpyridine,
(b) a trithiocarbonate RAFT agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium by the reaction of a latent surfactant with a surfactant activator;
(2) polymerizing the 4-vinylpyridine within the first aqueous polymerization medium in the presence of a first free radical initiator to produce a poly(4-vinylpyridine);
(3) protonating the poly(4-vinylpyridine) to form a protonated poly(4-vinylpyridine) RAFT macroinitiator;
(4) preparing a second aqueous polymerization medium which is comprised of the protonated poly(4-vinylpyridine) RAFT macroinitiator and a monomer containing ethylenic unsaturation but is exclusive of a surfactant; and
(5) polymerizing the protonated poly(4-vinylpyridine) RAFT macroinitiator and monomer containing ethylenic unsaturation within the second aqueous medium in the presence of a second free radical initiator and a temperature less than 100°C to produce an amphiphilic block copolymer of the 4-vinylpyridine and monomer containing ethylenic unsaturation.</p> |
申请公布号 |
EP1801137(A1) |
申请公布日期 |
2007.06.27 |
申请号 |
EP20060126183 |
申请日期 |
2006.12.14 |
申请人 |
THE GOODYEAR TIRE & RUBBER COMPANY |
发明人 |
PARKER, DANE KENTON;KULIG, JOSEPH JOHN |
分类号 |
C08F293/00;C08F2/38;C08F8/00;C08L53/00;C08L53/02 |
主分类号 |
C08F293/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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