An organopolysiloxane graft-type polyester is prepared by reacting, in the presence of an effective amount of a hydrosilylation catalyst, a polyester containing at least one alkenyl group and having no unsaturated terminal groups, said polyester having a number average molecular weight of about 500 to about 5,000, and an organopolysiloxane containing one hydrosilyl group. The organopolysiloxane graft-type polyester has excellent compatibility with polyesters and can improve the surface smoothness and hydrophobic property of the polyester when modified therewith.
The present invention relates to a novel organopolysiloxane-modified polyester and a method for the preparation thereof. The organopolysiloxane-modified polyester polymer comprises a polyester segment having a number average molecular weight of 300 to 15,000, a silicon-bonded hydrolyzable group-free organopolysiloxane segment, and a silicon-bonded hydrolyzable group-containing silicone segment. The compositions of the present invention are characterized by their ability to cure at room temperature in the presence of a condensation reaction-accelerating catalyst.
The introduction of a curable organosilicone composition that affords a very releasable, highly printable cured film that is strongly adhesive for such substrates as polyester film and so forth. Curable organosilicone composition that is composed of (A) polyorganosiloxane-grafted, aliphatic ally unsaturated polyester (B) organopolysiloxane that contains at least 3 silicon-bonded hydrogen atoms in each molecule, and (C) hydrosilylation-reaction catalyst.
5254606 - Surface-protective agent - Owned by Dow Corning Toray Silicone Co., Ltd. (Tokyo,JP) [*] Notice:The portion of the term of this patent subsequent to January 21, 2009 has been disclaimed.
A graft type silicone-modified polyester forms a base for a surface-protective agent which has excellent water-repellency properties as well as retention of said properties after exposure to the environment.
Disclosed are purified polyether silicone addition reaction products of a hydrogen siloxane and a polyoxyalkylene containing a terminal double bond, which in unpurified form contains one or both of unreacted polyoxyalkylene and internal rearrangement side reaction products thereof which generate unpleasant odors in the reaction product upon storage and upon contact with water, substantially free from said unreacted polyoxyalkylene and rearrangement products thereof so that the total quantity of ketones and aldehydes produced by a treatment of the purified polyether silicones in a closed system at 60.degree. C. for 24 hours with a quantity of 10 .sup.4 N aqueous hydrochloric acid equivalent to the quantity of said polyether silicones, is no greater than 1,000 ppm of said polyether silicones, which purified polyether silicones are obtained by treating the unpurified form thereof with water, an aqueous solution of pH no greater than 7 or an acidic material, until substantially all of the odorous substances are produced and then removing the odorous substances therefrom.
A fiber treating agent which is a silicone modified polyester in which a polyester has a polyoganosiloxane grafted thereto. The grafted polyester is the reaction product of an allyl ether containing polyester and a polyorganosiloxane wherein at least one of the silicon atoms of the polyorganosiloxane has a hydrogen atom attached thereto. Preferably, the hydrogen atom is attached to one terminal end of the polyorganosiloxane. The reaction product is modified by reacting the reaction product with a polycarboxylic anhydride, and the amine salt of the modified reaction product may be formed by reacting the modified reaction product with an aminoalkylalkoxysilane. Methods of treating fibrous materials are also described.
