Block copolymers and preparation thereof
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United States of America Patent
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Oct 9, 2001
Issued Date -
N/A
app pub date -
Nov 18, 1999
filing date -
Aug 22, 1997
priority date (Note) -
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Abstract
The invention relates to a new polysiloxane-based block copolymer having a formula T(AB).sub.x AT (I) wherein A=--(SiR'R'O).sub.n SiR'R'--, wherein R' and R' are the the same or different and represent a lower alkyl group or a phenyl group, wherein said alkyl or phenyl group may be substituted or unsubstituted; B is polyalkylene oxide of formula ##STR1## wherein R is hydrogen, lower alkyl, or phenyl; R.sub.1 is hydrogen or lower alkyl; y is 2-6; m is 1-30; n is 1-3000; and x is 0-100.
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