Patent ID: 8877859
Filing Date: 2014-11-04
Classification: C08G

Abstract:
1. A process for preparing silicone aspartate copolymers, comprising: in a first step, reacting an organic polymer (1) of the formula where R R is a monovalent hydrocarbon radical having 1 to 18 carbon atoms, R x is 0 or an integer from 1 to 100 and y is 0 or an integer from 1 to 100, with the proviso that the sum x+y is at least 3, having at least one hydroxyl group with maleic anhydride (2) with the proviso that maleic anhydride is used in amounts of 0.5 to 1.1 mol per mole of hydroxyl group (—OH) in the polymer (1), where a maleic monoester (3) of the formula is obtained, and, in a second step, reacting the maleic monoester (3) obtained from the first step with an organopolysiloxane (4) having at least one primary or secondary amino group, where the primary or secondary amino group is an Si—C bonded group X of the formula where R R R g is 0, 1, 2, 3 or 4, with the proviso that the organopolysiloxane (4) is used in amounts of 1 to 10 mols, of amino groups in (4) per mole of C═C double bond in the maleic monoester (3), where silicone aspartate copolymers are obtained which contain, per molecule, at least one aspartate group Y of the formulae (X) and (X′) where (Si≡) indicates a linkage via an Si—C bond to the organopolysiloxane.