Polysiloxane-polylactone block copolymers
First Claim
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1. A method of increasing the crystallization rate of polyethylene terephthalate by blending therewith a polysiloxane/polycaprolactone block copolymer of the formula (I):
- ##STR6## wherein n is an integer from 1 to about 200;
R1, R2, R3 and R4 are independently linear or branched alkyl, alkenyl, haloalkyl, or haloalkenyl of 1 to 6 carbon atoms;
aryl of 5 to 7 carbon atoms;
aralkyl of 6 to 8 carbon atoms;
A and A'"'"' are independently ##STR7## p is an integer from 0 to 6;
m is an integer from 1 to about 250;
R6 is hydrogen or linear or branched alkyl of 1 to 6 carbon atoms;
##STR8## where r, t and w are independently integers from 1 to 6 and v is an integer from 1 to about 100;
R8 and R10 are independently hydrogen or alkyl of 1 to 6 carbon atoms.
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Abstract
Novel linear polysiloxane-polylactone block copolymers are useful as surface modifying additives due in part to their miscibility with a wide variety of base polymers. A particularly preferred polysiloxane-polycaprolactone linear blocked copolymer is miscible with nylon and is useful for forming surface modified nylon products.
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Citations
5 Claims
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1. A method of increasing the crystallization rate of polyethylene terephthalate by blending therewith a polysiloxane/polycaprolactone block copolymer of the formula (I):
- ##STR6## wherein n is an integer from 1 to about 200;
R1, R2, R3 and R4 are independently linear or branched alkyl, alkenyl, haloalkyl, or haloalkenyl of 1 to 6 carbon atoms;
aryl of 5 to 7 carbon atoms;
aralkyl of 6 to 8 carbon atoms;A and A'"'"' are independently ##STR7## p is an integer from 0 to 6;
m is an integer from 1 to about 250;
R6 is hydrogen or linear or branched alkyl of 1 to 6 carbon atoms;
##STR8## where r, t and w are independently integers from 1 to 6 and v is an integer from 1 to about 100;R8 and R10 are independently hydrogen or alkyl of 1 to 6 carbon atoms. - View Dependent Claims (2, 3, 4, 5)
- ##STR6## wherein n is an integer from 1 to about 200;
Specification