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US 5,847,091 AGranted
Fluorine-containing azo compounds
AssigneeWako Pure Chemical Industries, Ltd.
InventorsKazuo Shiraki, Nobutaka Shimamura
Life of this patent
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Abstract
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.
Claims10
A fluorine-containing azo compound represented by the formula:
- ##STR7## wherein R.sup.1 and R.sup.3 independently represent a lower alkyl group;
- R.sup.2 and R.sup.4 independently represent a lower alkyl group or a cyano group;
- A.sub.1 and A.sub.2 independently represent a lower alkylene group which may contain one or more oxygen atoms and/or an aromatic ring;
- Z.sub.1 and Z.sub.2 independently represent an ester linkage or an amido linkage;
- T.sub.1 and T.sub.2 independently represent --CONH-- or a direct link;
- Q and Q' independently represent a fluorine-containing segment;
- and Rf.sup.1 and Rf.sup.2, independently represent a fluorine-containing alkyl group, wherein the fluorine-containing segment is represented by the formula:
- --(Q.sub.1 --O).sub.p --(Q.sub.2 --O).sub.q --(Q.sub.3 --O).sub.r --(Q.sub.4 --O).sub.s Q.sub.5 -- 2!
- wherein Q.sub.1 and Q.sub.4 independently represent an alkylene group;
- Q.sub.2 and Q.sub.3 independently represent a fluorine-containing alkylene group;
- Q.sub.5 represents an alkylene group or a fluorine-containing alkylene group;
- p and s independently represent 0 or a natural number;
- and q and r independently represent a natural number.
10 more elements
A process for producing a fluorine-containing azo compound, which comprises reacting an azo compound of the formula:
- ##STR8## wherein Y.sub.1 and Y.sub.2 represent independently a carboxyl group, a hydroxyl group, an amino group or an isocyanate group;
- wherein R.sup.1 and R.sup.3 independently represent a lower alkyl group;
- R.sup.2 and R.sup.4 independently represent a lower alkyl group or a cyano group;
- A.sub.1 and A.sub.2 independently represent a lower alkylene group which may contain one or more oxygen atoms and/or an aromatic ring;
- T.sub.1 and T.sub.2 independently represent --CONH-- or a direct link;
- with a fluorine-containing compound which has terminal groups reactive with Y.sub.1 and Y.sub.2 to form an ester linkage or an amido linkage, wherein the fluorine containing compound is represented by the formula:
- W--(Q.sub.1 --O).sub.p --(Q.sub.2 --O).sub.q --(Q.sub.3 --O).sub.r --(Q.sub.4 --O).sub.s --Q.sub.5 --Rf.sup.3 4!
- wherein Q.sub.1 and Q.sub.4 independently represent an alkylene group;
- Q.sub.2 and Q.sub.3 independently represent a fluorine-containing alkylene group;
- Q.sub.5 represents an alkylene group or a fluorine-containing alkylene group;
- p and s independently represent 0 or a natural number;
- and q and r independently represent a natural number;
- W represents a group reactive with Y.sub.1 and Y.sub.2 to form an ester linkage or an amido linkage;
- and Rf.sup.3 represents a fluorine-containing alkyl group.
11 more elements
Dependencies are inferred from the claim text.