VERFAHREN ZUR HERSTELLUNG WÄSSRIGER SILICONEMULSIONEN

The prodn. of aq. silicone emulsions (A) comprises (i) adding 0.1-20 pts.wt. emulsifier and 1-50 pts.wt. water, with intensive mixing, to 100 pts.wt. of a polymeric organo-silicon cpd. of formula Ra(R O)bSiO(4-a-b)/2 (I) dissolved in organic solvent, (ii) removing solvent as a water/solvent mixt. wh...

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Hauptverfasser:	NITZ, THOMAS, BEUSCHEL, GUENTHER, OTTO, REINER, RAUTSCHEK, HOLGER
Format:	Patent
Sprache:	ger
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	The prodn. of aq. silicone emulsions (A) comprises (i) adding 0.1-20 pts.wt. emulsifier and 1-50 pts.wt. water, with intensive mixing, to 100 pts.wt. of a polymeric organo-silicon cpd. of formula Ra(R O)bSiO(4-a-b)/2 (I) dissolved in organic solvent, (ii) removing solvent as a water/solvent mixt. when the reaction mixt. is homogeneous and no longer free-flowing, and then (iii) adding the amt. of water for the required final concn., opt. with known additives, to give a homogeneous emulsion. In (I), R = opt. substd., satd. and/or unsatd. 1-30C hydrocarbyl; R = H and/or 1-4C alkyl; a = 0.6-2.4; b = 0-0.5. In a modification of this process, 1-100 pts.wt. liq., monomeric, oligomeric and/or polymeric organo-Si cpd. (B) may be added between stages (ii) and (iii).