Phenol-modified polyorganosiloxane with reduced platinum content, method for preparing the same, and modifier for organic resin containing the same

摘要

A phenol-modified polyorganosiloxane suitable as a modifier for an organic resin, in which a platinum metal content is reduced, and the yellowing is reduced, a method for preparing the same, and a modifier for an organic resin containing the same are provided. The phenol-modified polyorganosiloxane is a compound of formula (I), having a platinum metal content of 0.9 ppm or less. The phenol-modified polyorganosiloxane can be prepared by subjecting a phenol compound substituted with an alkenyl group of formula (IV) and a polyorganohydrogen siloxane of formula (V) to a hydrosilation reaction in the presence of a platinum-based catalyst applicable to a homogenous system, and subsequently, reducing the platinum metal content of the resulting product to 0.9 ppm or less by conducting one or more filtration procedures selected from the group consisting of filtration conducted where activated carbon is added, filtration conducted by using a filter comprising activated carbon, and filtration conducted by using a filter capable of adsorbing cations, alone or in combination.

主权项

1. A phenol-modified polyorganosiloxane represented by the following formula (I) and having a platinum metal content of 0.9 ppm or less: wherein each Ra independently represents a substituted or unsubstituted, and linear, branched or cyclic alkylene moiety; and Ra is a substituted or unsubstituted C2-C20 alkylene moiety; R and R′ are identical or different from one another, and each R and R′ independently represents a group selected from the group consisting of C1-C20 alkyl or halogenated alkyl groups and substituted or unsubstituted C6-C20 aryl groups; each X independently represents a substituent selected from the group consisting of substituted or unsubstituted C1-C20 linear, branched or cyclic alkyl groups; substituted or unsubstituted C6-C20 aryl groups; substituted or unsubstituted C6-C20 aryl C1-C20 alkyl groups (aralkyl groups); substituted or unsubstituted C1-C20 alkyloxy groups; substituted or unsubstituted C6-C20 aryloxy groups; substituted or unsubstituted C6-C20 aryl C1-C20 alkyloxy groups; and halogen atoms; each m independently represents an integer ranging from 0 to 4; n is a number ranging from 5 to 500; and the substitution positions of the OH groups on the phenyl groups at both terminals of the molecule are each independently ortho, meta, or para position.