Silicon-containing polymer, process for preparing the same and monomer thereof
AssigneeKanegafuchi Chemical Industry Co., Ltd.
InventorsJun Kotani, Manabu Tsumura, Takahisa Iwahara, Toshifumi Hirose
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Abstract
A silicon-containing polymer comprising a structural unit of the formula (1): ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and represent a monovalent organic group having 1 to 20 carbon atoms, and the benzene ring may have a substituent, which has good heat resistance.
Claims5
A silicon-containing polymer comprising a structural unit of the formula (2):
- ##STR31## wherein R.sup.1 and R.sup.2 are the same or different and represent a methyl group or a phenyl group, which is obtained by hydro-silylation polymerizing at least one monomer combination selected from the group consisting of
- a combination of a silicon-containing compound of the formula (3):
- ##STR32## wherein R.sup.1 and R.sup.2 are the same as defined above and a compound having at least two unsaturated groups, and
- a monomer combination of a silicon-containing compound of the formula (4):
- ##STR33## wherein R.sup.1 and R.sup.2 are the same as defined above and a compound having at least two hydrosilyl groups,
- wherein the content of said structural unit of the formula (2) is at least 50% by weight of the silicon-containing polymer.
A process for preparing a silicon-containing polymer comprising hydrosilylation polymerizing at least one monomer selected from the group consisting of a silicon-containing compound having two SiH groups of the formula (3):
- ##STR36## wherein R.sup.1 and R.sup.2 are the same or different and represent a mono-valent organic group having 1 to 20 carbon atoms and a silicon-containing compound having two alkenylsilyl groups of the formula (4):
- ##STR37## wherein R.sup.1 and R.sup.2 are the same as defined above and wherein said silicon-containing polymer includes at least 60% by weight of structural units of formula (1):
- ##STR38## wherein R.sup.1 and R.sup.2 are the same or different and represent a mono-valent organic group having 1 to 20 carbon atoms.
Dependencies are inferred from the claim text.