Process for producing vinyl polymer having alkenyl group at end vinyl polymer and curable composition
AssigneeKaneka Corporation
InventorsRyotaro Tsuji, Tomoki Hiiro
Life of this patent
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Abstract
Objects of the present invention are to provide a process for easily producing an alkenyl-terminated vinyl polymer without using a metal compound requiring a complicated purification step, and to provide a curable composition containing the vinyl polymer. An alkenyl group is incorporated into an end of a vinyl polymer having a thiocarbonylthio structure at the end to produce an alkenyl-terminated vinyl polymer. Mixing this vinyl polymer with a compound having a hydrogen-silicon bond and a hydrosilylation catalyst gives the curable composition.
Claims10
A process for producing an alkenyl-terminated vinyl polymer comprising introducing an alkenyl group represented by general formula (3):
- (wherein R3 is a hydrogen atom or hydrocarbon group of 1 to 20 carbon atoms that may contain an ether bond or ester bond), into a vinyl polymer having a thiocarbonylthio structure selected from the group consisting of a vinyl polymer represented by general formula (1):
- (wherein R1 is a polyvalent organic group (p>1) which may contain a nitrogen atom, oxygen atom, sulfur atom, halogen atom, silicon atom, phosphorus atom, and metal atom, and may be a polymer, or R1 may be a hydrogen atom or halogen atom for p=1;
- Z1 is a hydrogen atom, halogen atom, or monovalent organic group which may contain a nitrogen atom, oxygen atom, sulfur atom, halogen atom, silicon atom, and phosphorus atom, and may be a polymer;
- X is a hydrogen atom, halogen atom, or monovalent organic group which may contain a nitrogen atom, oxygen atom, sulfur atom, halogen atom, and silicon atom;
- Y is a hydrogen atom, halogen atom, or monovalent organic group which may contain a nitrogen atom, oxygen atom, sulfur atom, halogen atom, and silicon atom;
- p is an integer of 1 or more;
- 1 is an integer of 5 or more;
- and when plural X's, Y's, and Z1's are present, the plural X's, Y's, and Z1's may be each the same or different), and a vinyl polymer represented by general formula (2):
- (wherein R2 is a hydrogen atom, halogen atom, or monovalent organic group which may contain a nitrogen atom, oxygen atom, sulfur atom, halogen atom, silicon atom, phosphorus atom, and metal atom, and may be a polymer;
- Z2 is a sulfur atom (when q=2), oxygen atom (when q=2), nitrogen atom (when q=3), or polyvalent organic group which may contain a nitrogen atom, oxygen atom, sulfur atom, halogen atom, silicon atom, and phosphorus atom, and may be a polymer;
- X is a hydrogen atom, halogen atom, or monovalent organic group which may contain a nitrogen atom, oxygen atom, sulfur atom, halogen atom, and silicon atom;
- Y is a hydrogen atom, halogen atom, or monovalent organic group which may contain a nitrogen atom, oxygen atom, sulfur atom, halogen atom, and silicon atom;
- q is an integer of 2 or more;
- m is an integer of 5 or more;
- and plural X's, Y's, and R2's may be each the same or different);
- wherein the thiocarbonylthio group of the vinyl polymer having the thiocarbonylthio structure is converted into a mercapto group or a mercaptide group, and the mercapto group or the mercaptide group is allowed to react with an alkenyl-containing compound.
Dependencies are inferred from the claim text.