Methacryl function dimethylpolysiloxanes and graft copolymers thereof
First Claim
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1. A methacryl functional dimethylpolysiloxane having the general formula (1):
- ##STR23## wherein letters n and m are independently an integer of from 2 to 50.
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Abstract
Novel methacryl functional dimethylpolysiloxanes are provided. Graft copolymers thereof with vinyl monomers exhibit water repellency, mold release properties, slip properties, weatherability, and gas permeability.
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4 Claims
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1. A methacryl functional dimethylpolysiloxane having the general formula (1):
- ##STR23## wherein letters n and m are independently an integer of from 2 to 50.
- View Dependent Claims (2, 3)
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4. A method for producing a methacryl functional dimethylpolysiloxane having the general formula (1):
- ##STR25## wherein letters n and m are independently an integer of from 2 to 50 comprising;
subjecting hexamethylcyclotrisiloxane having formula (2);
##STR26## to ring opening polymerization in the presence of trimethylsilanol (CH3)3 SiOH and a pentavalent silicon complex catalyst to synthesize two single silanol-terminated compounds having formulae (3) and (4);
##STR27## wherein letters n and m are as defined above, mixing the single silanol-terminated compounds of formulae (3) and (4) with γ
-methacryloxypropylmethyldichlorosilane in equimolar amounts, and dehydrochlorinating the mixture in the presence of a hydrogen chloride scavenger.
- ##STR25## wherein letters n and m are independently an integer of from 2 to 50 comprising;
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