Epoxy-capped branched silicones and copolymers thereof
AssigneeGeneral Electric Company
InventorsWilliam J. Raleigh, Michael A. Lucarelli, James F. Hoover
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Abstract
There is disclosed a novel epoxy-modified branched epoxy copolymerizate which can be copolymerized with other thermoplastics, such as polycarbonates, to modify melt flow.
Claims31
A thermoplastic copolymer composition comprising:
- (a) a thermoplastic polymer having alcohol and/or amine substituents;
- and
- (b) a branched epoxy-modified silicone copolymerizate having the following general formulae:
- T.sub.z-2 D.sub.x M'.sub.z or Q.sub.y D.sub.x M'.sub.2y+2
- wherein T represents a trifunctional silicone of the formula RSiO.sub.1.5 where R is a monovalent alkyl, cycloalkyl or phenyl group, D represents a difunctional silicone of the formula R.sub.2 SiO where each R is independently as defined above, x is 0 or an integer of 1 or greater, Q is a quadrifunctional silicone of the formula SiO.sub.2, M' is an epoxy-modified monofunctional silicone of the formula R.sup.1.sub.3 SiO.sub.0.5 where R.sup.1 is a monovalent alkyl, cycloalkyl or phenyl group or an epoxy group provided at least one R.sup.1 is an epoxy group, y is an integer of from 1 to 4, inclusive, and z is an integer of 3 or greater.
A polycarbonate copolymer comprising
- from about 50 to about 99.5 weight percent of a polycarbonate resin;
- and
- from about 0.5 to about 50 weight percent of a branched epoxy-modified silicon composition having the following general formulae:
- T.sub.z-2 D.sub.x M'.sub.z or Q.sub.y D.sub.x M'.sub.2y+2
- wherein T represents a trifunctional silicone of the formula RSiO.sub.1.5 where R is a monovalent alkyl, cycloalkyl or phenyl group, D represents a difunctional silicone of the formula R.sub.2 SiO where each R is independently as defined above, x is 0 or an integer of 1 or greater, Q is a quadrifunctional silicone of the formula SiO.sub.2, M' is an epoxy-modified monofunctional silicone of the formula R.sup.1.sub.3 SiO.sub.0.5 where each R.sup.1 is independently a monovalent alkyl, cycloalkyl or phenyl group or an epoxy group provided at least one R.sup.1 is an epoxy group, y is an integer of from 1 to 4, inclusive, and z is an integer of 3 or greater.
A method for preparing a polycarbonate having modified melt flow comprising
- (i) adding a branched epoxy-modified silicone copolymerizate to a dihydric phenol, optionally in the presence of a solvent;
- (ii) adding a carbonate precursor and reacting;
- and
- (iii) recovering the improved polycarbonate copolymer.
A branched epoxy-modified silicone composition having the following general formulae:
- T.sub.z-2 D.sub.x M'.sub.z or Q.sub.y D.sub.x M'.sub.2y+2
- wherein T represents an trifunctional silicone of the formula RSiO.sub.1.5 where R is a monovalent alkyl, cycloalkyl or phenyl group, D represents a difunctional silicone of the formula R.sub.2 SiO where each R is independently as defined above, x is 0 or an integer of 1 or greater, Q is a quadrifunctional silicone of the formula SiO.sub.2, M' is an epoxy-modified monofunctional silicone of the formula R.sup.1.sub.3 SiO.sub.0.5 where each R.sup.1 is a monovalent alkyl, cycloalkyl or phenyl group or an epoxy group provided at least one R.sup.1 is an epoxy group, y is an integer of from 1 to 4, inclusive, and z is an integer of 3 or greater.
A process for preparing an epoxy-modified branched silicone comprising reacting a silicone hydride of the formula T.sub.z-2 D.sub.x M".sub.z or Q.sub.y D.sub.x M'.sub.2y+2, where T represents a trifunctional silicone of the formula RSiO.sub.1.5 where R is a monovalent alkyl, cycloalkyl or phenyl group, D represents a difunctional silicone of the formula R.sub.2 SiO where each R is independently as defined above, x is 0 or an integer of 1 or greater, Q is a quadrifunctional silicone of the formula SiO.sub.2, M" represents a monofunctional silicone of the formula R.sup.2.sub.3 SiO.sub.0.5 wherein each R.sup.2 is independently hydrogen or monovalent alkyl, cycloalkyl or phenyl group provided at least one R.sup.2 is hydrogen, y is an integer of from 1 to 4, inclusive, and z is an integer of 3 or greater, with an epoxy compound in the presence of an effective amount of a hydrosilation catalyst.
Dependencies are inferred from the claim text.