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US 2016/0237218 A1Published application
Polydiorganosiloxane-polycarbonate block copolymers
AssigneeSabic Global Technologies B.V.
InventorsNiles Richard Rosenquist, Fabrizio Micciche, Jozua de Heer, Robert Dirk van de Grampel, James F. Hoover, Nathalie Gonzalez Vidal
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Abstract
Disclosed herein are polydiorganosiloxane-polycarbonate block copolymers having desirable optical properties, and methods of making such block copolymers. Also disclosed herein are analytical methods for evaluating hydroxyaryl end-capped polydialkylsiloxane monomers.
Claims20
A process for preparing a polydiorganosiloxane-polycarbonate block copolymer, the process comprising:
- (a) providing a composition comprising hydroxyaryl end-capped polydiorganosiloxane monomers having the following formula (Ia):
- wherein:
- each R is independently a C1-C13 monovalent organic group;
- each X is independently a C2-C4 alkylenyl group;
- each R′ is independently selected from the group consisting of halo, cyano, nitro, C1-C8 alkyl, C1-C8 alkoxy, C1-C8 thioalkoxy, C2-C8 alkenyl, C2-C8 alkenyloxy, C3-C8 cycloalkyl, C3-C8 cycloalkyloxy, C6-C10 aryl, C6-C10 aryloxy, C7-C12 arylalkyl, and C7-C12 arylalkoxy;
- each m is independently 0, 1, 2, 3 or 4;
- and
- n is about 2 to about 200;
- wherein the composition has a polydispersity index (Mw/Mn) of less than 2.2, as measured by size exclusion chromatography with ultraviolet (UV) and refractive index (RI) detection;
- and
- wherein the composition has a % low molecular weight fraction of less than 15%;
- and
- (b) reacting the composition with a carbonate precursor and a dihydroxy monomer of formula (ia):
- HO—R1—OH (ia)
- wherein R1 comprises an aliphatic, alicyclic, or aromatic group, or any combination thereof;
- to form the polydiorganosiloxane-polycarbonate block copolymer.
13 more elements
A process for preparing a polydiorganosiloxane-polycarbonate block copolymer, the process comprising:
- (a) providing a composition comprising hydroxyaryl end-capped polydiorganosiloxane monomers having the following formula (Ia):
- wherein:
- each R is independently a C1-C13 monovalent organic group;
- each X is independently a C2-C4 alkylenyl group;
- each R′ is independently selected from the group consisting of halo, cyano, nitro, C1-C8 alkyl, C1-C8 alkoxy, C1-C8 thioalkoxy, C2-C8 alkenyl, C2-C8 alkenyloxy, C3-C8 cycloalkyl, C3-C8 cycloalkyloxy, C6-C10 aryl, C6-C10 aryloxy, C7-C12 arylalkyl, and C7-C12 arylalkoxy;
- each m is independently 0, 1, 2, 3 or 4;
- and
- n is about 2 to about 200;
- wherein the composition has a polydispersity index (Mw/Mn) of less than 2.3, as measured by size exclusion chromatography with ultraviolet (UV) and refractive index (RI) detection;
- and
- wherein the composition has a % low molecular weight fraction of less than 15%;
- and
- (b) reacting the composition with a carbonate precursor and a dihydroxy monomer of formula (ia):
- HO—R1—OH (ia)
- wherein R1 comprises an aliphatic, alicyclic, or aromatic group, or any combination thereof;
- to form the polydiorganosiloxane-polycarbonate block copolymer.
13 more elements
Dependencies are inferred from the claim text.