Polysiloxane/poly(oxazoline) copolymers
AssigneeThoratec Laboratories Corporation
InventorsJudy S. Riffle, Iskender Yilgor
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Abstract
Novel block copolymers are provided, comprising poly(oxazoline) blocks and polysiloxane blocks. Novel polysiloxane intermediates for preparing such block copolymers are also provided which contain benzyl halide terminal groups. The block copolymers are useful as surface-modifying additives for base polymers.
Claims14
A block copolymer comprising blocks of the formula ##STR6## and blocks of the formula ##STR7## wherein R is alkyl of 1 to 4 carbon atoms, fluoroalkyl of 1 to 4 carbon atoms or aryl of 5 to 10 carbon atoms;
- R' is hydrogen, alkyl of 1 to 4 carbon atoms or aryl of 5 to 10 carbon atoms;
- and n and m are independently 1 to about 200.
A polymer of the formula ##STR10## wherein X is halo, aryl of 5 to 10 carbon or fluoroalkyl of 1 to 4 carbon atoms;
- R is alkyl of 1 to 4 carbon atoms, fluoroalkyl of 1 to 4 carbon atoms or aryl of 5 to 10 carbon atoms;
- R" is hydrogen or methyl;
- n is an integer from 1 to about 200 and p and p' are independently 0 or 1.
A polymer mixture comprising a base polymer and from 1 to 5 parts by weight of a block copolymer of the formula A-B-A
- wherein A is ##STR11## B is ##STR12## R" is hydrogen or methyl;
- p and p' are independently 0 or 1;
- and W is halo, aryl of 5 to 10 carbon atoms or alkyl of 1 to 10 carbon atoms;
- R is alkyl of 1 to 4 carbon atoms, fluoroalkyl of 1 to 4 carbon atoms or aryl of 5 to 10 carbon atoms;
- R' is hydrogen, alkyl of 1 to 4 carbon atoms or aryl of 5 to 10 carbon atoms;
- and n and m are independently 1 to about 200.
Dependencies are inferred from the claim text.