| CPC C08G 77/06 (2013.01) | 17 Claims |
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1. A process for producing organically modified polysiloxanes and/or silanes by hydrosilylation, comprising the following steps:
a) initiating a reaction to produce said organically modified polysiloxanes and/or silanes in a reaction mixture formed by adding together:
(i) an SiH-functional siloxane and/or silane;
(ii) an unsaturated organic compound;
(iii) a noble metal catalyst; and
(iv) magnesium oxide;
(v) optionally 0.25 to 5% by weight of water based on the total reaction mixture weight;
b) optionally performing a distillation;
c) performing a separation of solids;
wherein:
magnesium oxide with a purity of greater than 85% is present at the time that the reaction of step a) is initiated and/or after completion of step a); and
sufficient magnesium oxide is added so that, compared to the process performed in the absence of said magnesium oxide, a product is made with a reduced Hazen number and with a reduced amount of catalyst in the final product.
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