Patent EP-1721926-A1 (EP)
Inventor: SCHNEIDER OTTO DR
IPC: C08L83/04
Filed: 2006-05-04
Abstract: Preparing a dispersion of cross-linked organopolysiloxane comprises reaction of siloxane units (I) and/or siloxane units (II) with silane compounds (III) or their hydrolyzed products, in the presence of dispersing agent, emulsifiers, optionally further materials, which are not directly involved in the reaction, and a catalyst containing a non-metal, where (I), (II) and (III) are taken in such a way that the organopolysiloxane compound is cross-linked and insoluble in toluol. Preparing a dispersion of cross-linked organopolysiloxane comprises reaction of siloxane units (I) of formula (A aR bX cSiO 4-(a+b+c)/2) and/or siloxane units (II) of formula R b(OR 1>) dSiO 4-(c+d)/2with silane compounds (III) of formula W 1>R pSi(OR 7>) 3-por their hydrolyzed product, in the presence of dispersing agents, emulsifiers, optionally further materials they are not directly involved in the reaction, and a catalyst containing a non-metal, where (I), (II) and (III) are taken in such a way that the organopolysiloxane compound is cross-linked and insoluble in toluol. R : H or an monovalent 1-200C hydrocarbon, which is substituted with halo, amine, ammonium, mercapto, acrylate or maleinimide; X : a compound of formula (-OR 1>), Cl, -O ->, which balances the charged protons and/or organic or inorganic ionic substance, or a compound of formula -(R 2>) h-[OCH 2CH 2] e[OC 3H 6] f[O(C 4H 8) 4] gOR 3>; R 1>H or 1-200C hydrocarbon, which is interrupted by O, S, N or P; R 2>a bivalent 1-200C hydrocarbon, which is interrupted by -C(O)-, -C(O)O-, -C(O)NR 1>, -NR 1>, - N +>HR 1>, -O-, -S- and/or substituted with F, Cl or Br; R 3>R 1>or a compound of formula -C(O)R 1>or -Si(R 1>) 3; A : a compound of formula -R 4>(B 1>) z; R 4>bi, tri- or tetravalent hydrocarbon with 3-200C, preferably 3-18C, which is interrupted by -C(O)-, -C(O)O-, -C(O)NR 5>-, -NR 5>-, -N +>HR 5>-, -N +>R 5>R 5>-, -O-, -S-, -(HO)p(O)- or -(NaO)p(O)- and substituted with F, Cl or Br; R 5>H or 1-200C hydrocarbon, which is interrupted by -C(O)-, -C(O)O-, -C(O)NR 5>, -NR 5>-, -N +>HR 5>, -N +>R 5>R 5>-, -O- or -S- and substituted with F, Cl or Br; B 1>R 5>, -COO-, -SO 3-, -OPO 3H y-, -N +>R 5>R 5>R 5>, -P +>R 5>R 5>R 5>, -NR 5>R 5>, -OH, -SH, F, Cl, Br, -C(O)H, -COOH, -SO 3H, -C 6H 4-OH, -C mF 2m+1, dihydro-furan-2,5-dion-yl, dihydro-pyran-2,5-dion-yl, oxepane-2,7-dion-yl, terephthalate compound of formula (a), -oxirane-, -C(O)-CR 1>=CH 2, -O-C(O)-CR 1>=CH 2, -C 6H 4-(CH 2) x-CR 1>=CH 2, pyrrolidine-2,5-dion-yl, [1,3]dioxolan-2-on-yl or 2,4-dichloro-[1,3,5]triazin-yl; x : 1-20; y 1>0 or 1; z : 1-3 (according to valency of R 4>); h : 0 or 1; m : 1-20; a-c : 0-3, when the sum of a, b and c is =3; e-g : 0-200, when the sum of e, f and g is greater than 1; d : 0 or 1, when the sum of b and d is =3; W 1>a monovalent compound of formula -CR 6>2-Y 2>; R 6>H (preferred) or 1-4C alkyl; Y 2>a monofunctional groups of halo, monosubstituted with O and S and substituted with N and P; R 7>1-8C alkyl; and p : 0-2, preferably 0. Provided that per molecule contains at least A and X, where X is -OR 1>and R 1>is H. Independent claims are included for: (1) dispersion of cross-linked organopolysiloxane comprising cross-linked organopolysiloxane units of formula (A aR bW 1>n(OR 1>) dSiO 4-(a+b+d+n)/2), dispersing agent, emulsifier, optionally further materials that are not directly involved in the reaction, and catalysts containing non-metal, where the organopolysiloxane compound is cross-linked and insoluble in toluol; (2) a molded article, obtained by removing the dispersing agent from the dispersions; (3) a preparation of coatings comprising applying the dispersion on a substrate and removing the dispersing agent; and (4) a method for impregnation or infiltration of substrate comprising applying the dispersion on the substrate, impregnating or infiltrating the substrate or their surface and removing the dispersing agent. n : 0 or 1. Provided that the sum of a, b, d and n is =3, and a and n are not simultaneously 1 in the same siloxane unit and on an average, per molecule contains at least W 1>. [Image].