Wako Pure Chemical Industries, Inc.

Kazuo Shiraki

Nobutaka Shimamura

Seiji Hirose

Tsuneaki Maesawa

Tsutomu Miyagawa

Suguru Kondo

Motoaki Tanaka

Hiroyuki Tsurumoto

Yoshihisa Yamashita

Hiromi Kitano

Tomomitsu Abe

Azoamidine compound

A fluorine-containing macroazo compound having a fluorine segment in the molecule is useful as a polymerization initiator for producing, for example, fluorine-containing block polymers.

Fluorine-containing macroazo compound

Macroazo compounds, which comprise a repeating unit composed of a moiety of the formula (a), a (b) and a moiety of the formula (c)

Macroazo compounds

A compound shown by the general formula [1] ##STR1## wherein R.sup.1 and R.sup.2 are independently a lower alkyl group or a cyano group, R.sup.3 is a lower alkyl group and X is a lower alkylene group, showing high solubility into various kinds of polar solvents and are capable of effectively introducing hydroxy groups into terminal positions of polymers and their use.

Azoamide compound

An azoamide compound of the formula: ##STR1## wherein R.sup.1 through R.sup.4 are independently an alkyl group; X is an alkylene groupl Y is --O-- or --NH--; and n is an integer of 2 or more, is effective for producing a macroazo compound, which is a useful initiator for producing block copolymers.

Macroazo compound, a process for its production, a macroazo initiator,

An azo group-containing high molecular weight compound including --COHN--, an ester linkage, or an amido linkage and a monomer units of 10 to 1000 derived from .alpha.,.beta.-ethylenically unsaturated monomer is effective for producing a block copolymer having two or more polymer segments different in structure by one-step reaction.

AZO group-containing high molecular weight compound for block

An azoamide compound of the formula: ##STR1## wherein R.sup.1 through R.sup.4 are independently an alkyl group; X is an alkylene group; Y is --O-- or --N--; and n is an integer of 2 or more, is effective for producing a macroazo compound, which is a useful initiator for producing block copolymers.

High molecular weight azoamide compound

Azoamide compounds shown by the general formula �1 ! ##STR1## (Wherein R.sup.1 and R.sup.2 are independently a lower alkyl group, and R.sup.3 is a saturated alkyl group having 2 or more carbon atoms) and their use.

A fluorine-containing azo compound having a fluorine segment at a molecular terminal is useful as a polymerization initiator for producing, for example, fluorine-containing polymers.

Fluorine-containing azo compounds

An azo amide compound of the formula .dbd.N--C(CH.sub.3).sub.2 --CO--NH--R].sub.2 or a hydrate thereof or an acid-addition salt thereof, wherein R is --CH.sub.2 CH.dbd.CH.sub.2, benzyl chloride, picolyl, tetrahydropyridylmethyl and N-piperidinoethyl, is useful as a functional polymerization initiator for polymerizing acrylonitrile, methyl acrylate, styrene, vinyl acetate and other vinyl compounds.

Bis-alkylamide azo polymerization initiators

Cyclic azoamidine compounds having the formula and salts thereof are disclosed. ##STR1## wherein R denotes a methyl group or an ethyl group, and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently denote a lower alkyl group having one to four carbon atoms or a hydrogen atoms, provided that a case where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are all hydrogen atoms is excluded. The cyclic azoamidine compounds and their salts are useful as polymerization initiators in the production of polymer compounds.

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Saitama, Japan

Kazuo Shiraki