PERFLUOROPOLYETHER-POLYORGANOSILOXANE BLOCK COPOLYMER AND A SURFACE TREATMENT AGENT COMPRISING THE SAME
申请人:YAMANE Yuji
公开号:US20090143543A1
公开(公告)日:2009-06-04
A perfluoropolyether-polyorganosiloxane block copolymer represented by the following formula (1), the block copolymer having a number average molecular weight, reduced to polystyrene, of from 2,000 to 20,000,
W2-Q-Rf-Q-(W1-Q-Rf-Q)
g
-W2 (1)
wherein Rf is a perfluoropolyether block, W1 is a polyorganosiloxane block having at least one group represented by the following formula (2)
wherein X is a hydrolyzable group, R
1
is a C
1-4
alkyl group or a phenyl group, y is an integer of from 1 to 5, and a is 2 or 3,
Q is a C
2-12
divalent connecting group which may contain an oxygen atom and/or nitrogen atom,
W2 is an organosiloxane residue having a group represented by the aforesaid formula (1), and g is an integer of from 1 to 11.