Patent ID: 6103837
Filing Date: 2000-08-15
Classification: C08G

Abstract:
A siloxane random copolymer having a repeating unit represented by the following general formula (I), (II) and (III) at random: ##STR11## wherein: a is 1 or 2; R.sup.1 and R.sup.2 are independently a hydrogen atom or a hydrocarbon group of carbon number 1-20, wherein some or all of the hydrogen atoms in these hydrocarbon groups can be substituted with halogen atoms independently; R.sup.3 is a divalent hydrocarbon group of carbon number 1-20, wherein some or all of the hydrogen atoms in these hydrocarbon groups can be substituted with halogen atoms independently, or a group represented by --R.sup.5 --X--R.sup.6 -- wherein each of R.sup.5 and R.sup.6 is a divalent aromatic hydrocarbon group, wherein one or more of the hydrogen atoms on the aromatic rings may be substituted with a halogen atom, a hydrocarbon group, an alkoxy group or a phenoxy group independently; X is a single bond, --O--, --S--, --SO--, --SO.sub.2 --, --CO-- or a divalent hydrocarbon group of carbon number 1-20; ##STR12## wherein: b is 0 or 1, provided that if c in general formula III is 0, then b is 1; R.sup.3 is the same as defined above; ##STR13## wherein: c is 0 or 1, provided that if b in general formula II is 0, then c is 1; R.sup.3 is the same as defined above; R.sup.4 is a divalent hydrocarbon group of carbon number 1-20, wherein some or all of the hydrogen atoms in these hydrocarbon groups can be substituted with halogen atoms independently, or a group represented by --R.sup.5 --X--R.sup.6 -- wherein R.sup.5 and R.sup.6 are the same as defined above; X is the same as defined above.