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Preparation of acryloxyalkylorganodisiloxanes

  • US 2,922,807 A
  • Filed: 02/01/1957
  • Issued: 01/26/1960
  • Est. Priority Date: 02/01/1957
  • Status: Expired due to Term
First Claim
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1. A PROCESS FOR THE PREPARATION OF COMPOUNDS OF THE FROMULA CH2=CRCOO(CH2)NSIR'"'"''"'"'20SIR"3, WHERE EACH R'"'"''"'"' AND EACH R" IS A MONOVALENT HYDROCARBON RADICAL FREE OF ALPHATIC UNSATURATION, R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND A METHYL RADICAL, AND N IS AN INTEGER OF FROM 2 TO 4 INCLUSIVE, WHICH COMPRISES REACTING A DISILOXANE OF THE FORMULAE O(SIR'"'"''"'"'2)CH2)NOH)2, WHERE EACH R'"'"''"'"' AND N ARE ABOVE DEFINED, BY CONTACTING SAID DISILOXANE IN A LIQUID PHASE WITH AN ACID SELECTED FROM THE GROUP CONSISTING OF ARCYLIC AND METHACRYLIC ACID, AND REACTING THE REACTION MASS THEREFROM BY CONTACTING SAID MASS IN A LIQUID PHASE WITH A DISILOXANE OF THE FORMULA (R"3SI)20, WHERE EACH R" IS ABOVE DEFINED, IN THE PRESENCE OF FROM 1 TO 5 INCLUSIVE PERCENT BY WEIGHT BASED ON THE WEIGHT OF THE TOTAL SILOXANES IN THE SYSTEM, OF AN ACID ORGANOSILOXANE REARRANGEMENT CATALYST.

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