US 12,447,124 B2
Aqueous dispersions of pre-crosslinked organopolysiloxanes
Markus Grandl, Munich (DE); Gerhard Beer, Burghausen (DE); Werner Limmer, Pleiskirchen (DE); and Ernst Selbertinger, Burghausen (DE)
Assigned to Wacker Chemie AG, Munich (DE)
Appl. No. 17/614,083
Filed by Wacker Chemie AG, Munich (DE)
PCT Filed May 29, 2019, PCT No. PCT/EP2019/064120
§ 371(c)(1), (2) Date Nov. 24, 2021,
PCT Pub. No. WO2020/239229, PCT Pub. Date Dec. 3, 2020.
Prior Publication US 2022/0218589 A1, Jul. 14, 2022
Int. Cl. A61K 8/898 (2006.01); A61K 8/06 (2006.01); A61Q 5/12 (2006.01); C08G 77/26 (2006.01); C08J 3/07 (2006.01)
CPC A61K 8/898 (2013.01) [A61K 8/062 (2013.01); A61Q 5/12 (2013.01); C08G 77/26 (2013.01); C08J 3/07 (2013.01); C08J 2383/08 (2013.01)] 27 Claims
 
1. A pre-crosslinked organopolysiloxane composition, comprising:
wherein the pre-crosslinked organopolysiloxane contains on average at least one structural unit of the general formula (I)
SiRO2/2—Y—SiRO2/2  (I)
and units of the formula
R2SiO2/2  (II),
wherein Y is a radical of the formula
—R2—[NR3—R4—]x—NR3—OC—[C(Z1)(H)]k1—[C(Z2)(H)]k2—CO—NR3—[R4—NR]x—R2—,
wherein R may be identical or different and denotes a monovalent hydrocarbon radical which has 1 to 18 carbon atoms and may contain one or more heteroatoms from the group of N, P, S, O, and halogen;
wherein R2 denotes an SiC-bonded, divalent linear or branched hydrocarbon radical having 3 to 18 carbon atoms or an alkylene radical having 3 to 10 carbon atoms;
wherein R3 denotes a hydrogen atom, an alkyl radical having 1 to 8 carbon atoms or an acyl radical, such as acetyl radical;
wherein R4 denotes a divalent hydrocarbon radical having 1 to 6 carbon atoms or an alkylene radical having 1 to 6 carbon atoms;
wherein k1 is 0, 1, 2 or 3;
wherein k2 is 0, 1, 2 or 3;
wherein Z1 is —OH, H or —NHR3;
wherein Z2 is —OH, H or —NHR3; and
wherein the sum k1+k2 is ≥1 and that at least one radical Z1 or Z2 is a hydroxyl or NHR3 group, and so the bridging group Y contains at least one hydroxyl or NHR3 group.