Method for emulsion polymerization of organosiloxanes
Abstract
Abstract WHEN ORGANOSILOXANE REPRESENTED BY THE UNIT FORMULA (R)A-SI-O((4-A)/2) WHERE R IS A HYDROGEN ATOM OR A MONOVALENT HYDROCARBON RADICAL OR A SUBSTITUTED MONOVALENT HYDROCARBON RADICAL, AND A HAS AN AVERAGE VALUE OF FROM 1 TO 3 IS EMULISIFIED IN WATER CONTAINING A SALT-TYPE OR SALT FORM OF AN ANIONIC SURFACE ACTIVE AGENT, AND THEN BROUGHT INTO CONTACT WITH AN ACID TYPE CATIONIC EXCHANGE RESIN, SAID ANIONIC SURFACE ACTIVE AGENT IS SUBJECTED TO ION EXCHANGE AND TURNS SALT TYPE INTO ACID TYPE, THEREBY STARTING THE POLYMERIZATION OF THE ORGANOSILOXANE. THEREFORE, BY THIS METHOD, NOT ONLY THE ARRANGEMENT AND CONTROL OF THE REACTION CONDITION ARE MADE EASIER, BUT ALSO THE POLYMERIZATION REACTION IS MADE TO PROCEED UNIFORMLY, ENABLING THE PREPARATION OF STABLE ORGANOPOLYSILOXANE EMULSIONS.
Inventors
- 👤 Masanobu Ikoma
Bibliographic Details
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