Patent ID: 6943265

Claim:
A process for preparing hydroxyalkylpolysiloxanes of the formula V (SiO 4/2 ) k (R 1 SiO 3/2 ) m (R 1 2 SiO 2/2 ) p (R 1 3 SiO 1/2 ) q [O 1/2 SiR 3 2 —(CR 4 2 ) b —OH] s [O 1/2 H] t (V), in which silanol-containing organosiloxanes of the formula VI (SiO 4/2 ) k (R 1 SiO 3/2 ) m (R 1 2 SiO 2/2 ) p (R 1 3 SiO 1/2 ) q [O 1/2 H] r (VI) are reacted with compounds comprising at least one unit of the formula IV —[O—(CR 4 2 ) b —SiR 3 2 ) n — (IV) where R 1 , R 3 , R 4 are each a hydrogen atom or a monovalent C 1 -C 20 -hydrocarbon radical or C 1 -C 15 -hydrocarbonoxy radical which may be unsubstituted or substituted by —CN, —NCO, —NR x 2 , —COOH, —COOR x , halogen, acryl, epoxy, —SH, —OH or —CONR x 2 , in which one or more nonadjacent methylene units may be replaced by —O—, —CO—, —COO—, —OCO—, or —OCOO—, —S—or —Nr x — groups and in which one or more nonadjacent methine units may be replaced by —N═, —N═N— or —P═ groups, R x is hydrogen or a C 1 -C 10 -hydrocarbon radical which may be unsubstituted or substituted by —CN or halogen, b is at least 2, s is at least 1, r is at least 1, n is at least 2, s+t=r and k+m+p+q is at least 2.