Severine Cauvin,Sophie Hanssens,Alberto Petrosino,Benoit Rassart,Blondine Van Roy
申请号：
US14002789
公开号：
US20140093547A1
申请日:
2012.03.01
申请国别(地区):
US
年份:
2014
代理人:
摘要：
The invention relates to a method for the production of silicone in water emulsions by emulsion polymerisation. The emulsion contains particles of an organopolysiloxane polymer having an average particle diameter of less than 1 μm. The method comprises: —combining a silanol end-blocked organosiloxane starting polymer, water, and a surfactant said starting polymer having a viscosity of at least 2 Pa·s preferably at least 2.5 Pa·s preferably at least 3.5 Pa·s preferably at least 4 Pa·s and up to 150 Pa·s —emulsifying the starting polymer by agitating or shearing the ingredients —polymerizing the starting polymer to form a longer chain silanol end-blocked organopolysiloxane polymer wherein at least a portion of said polymerising step is performed at a temperature of less than or equal to 16° C. preferably less than or equal to 15° C.
