Silylated polybutadiene
The objective of the present invention is to provide a derivative of polybutadiene suitable as a material of a curable composition for obtaining a cured product having high shearing stress. The present invention provides: a silylated polybutadiene characterized by containing a repeating unit represented by formula (I) (in the formula: R 1 , R 2 , and R 3 each independently represents an unsubstituted or substituted aryl group, an alkyl group, or an aralkyl group. Among R 1 to R 3 , at least one of R 1 to R 3 is an aryl group or aralkyl group); a curable composition characterized by containing the silylated polybutadiene and a polymerization initiator; and a cured product obtained by curing the curable composition.
1. A silylated polybutadiene containing a repeating unit represented by formula (I):
where R 1 , R 2 , and R 3 each independently represents an unsubstituted or substituted aryl group, or an aralkyl group,
wherein a silylation rate of the silylated polybutadiene is 9 to 37%.
2. The silylated polybutadiene according to claim 1 , wherein the silylated polybutadiene is obtained by silylating polybutadiene comprising 75 to 100 mole % of repeating units represented by formula (II) and 0 to 25 mole % of repeating units represented by formula (III):
3. The silylated polybutadiene according to claim 1 , wherein a number average molecular weight is 500 to 10,000.
4. A curable composition containing the silylated polybutadiene according to claim 1 and a polymerization initiator.
5. A cured product obtained by curing the curable composition according to claim 4 .
6. An adhesive containing the silylated polybutadiene according to claim 1 and a polymerization initiator.
7. A composition for forming a thin-film containing the silylated polybutadiene according to claim 1 and a polymerization initiator.
8. The silylated polybutadiene according to claim 1 , wherein in said formula (I), each of R 1 , R 2 , and R 3 represents a phenyl group.