Hydrophilic group-containing AB-type block copolymer

Details Hydrophilic group-containing AB-type block copolymer Hydrophilic group-containing AB-type block copolymer

1990-11-30

1993-03-02

McCamish, Marion E.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Compositions to be polymerized by wave energy wherein said...

522176, 522182, 525267, 525301, C08F 250, C08F 400, C08F29300

Patent

active

051909898

ABSTRACT:
An AB-type block copolymer represented by formula (I): ##STR1## wherein R.sup.1 represents a hydrocarbon group having 1 to 10 carbon atoms; R.sup.2 represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms; R.sup.3 represents a benzyl group, ##STR2## wherein R.sup.4 represents an alkyl group having 1 to 10 carbon atoms, or an alkyl group having 1 to 18 carbon atoms; M represents a group represented by the formula (M.sup.2).sub.m --(M.sup.1).sub.n or (M.sup.1).sub.m --(M.sup.2).sub.n, each of m and n being a natural number of 20 to 5000; is prepared by a process of first polymerizing either a monomer for forming the M.sup.1 block or a monomer for forming the M.sup.2 block in the presence of a sulfur-containing compound having formula (XIII): ##STR3## wherein R.sup.1, R.sup.2 and R.sup.3 are as defined above so as to synthesize a polymer initiator having a dithiocarbamate group as indicated in formula (XIII) at the polymer terminal end, and then polymerizing the other monomer in the presence of the polymer initiator obtained in the first step; wherein the polymerization reactions in the first step and in the second step are carried out upon exposure of the monomers to ultraviolet radiation.

REFERENCES:
patent: 3287298 (1966-11-01), D'Alelio
patent: 4429076 (1984-01-01), Saito et al.
patent: 4604425 (1986-08-01), Ohmura et al.
T. Otsu & A. Kuriyama; Living Radical Polymerization in Homogeneous System by Using Iniferter; J. Macromol. Sci.-Chem., A21 (8 & 9), pp. 961-977 (1984).
Polymer Bulletin, vol. 7, 1982, pp. 197-203, Springer-Verlag; T. Otsu et al; "Efficient Synthesis of Two or Multi Component Block Copolymers Through Living Radical Polymerization with Polymeric Photoiniferters".
Database Chemical Abstracts, (Host STN), 1985, No. 102(2):167246w, Columbus, Ohio, U.S.; T. Otsu et al: "Polymer Design by Iniferter Technique in Radical Polymerization: Synthesis of AB and ABA Block Copolymers Containing Random and Alternating Copolymer Sequences".
Polymer Bulletin, vol. 11, 1984, pp. 135-142, Springer-Verlag; T. Otsu et al "Living Mono- and Biradical Polymerizations in Homogeneous System Synthesis of AB and ABA Type Block Copolymers."

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