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

• Current Assignee: Robert L. Merker
• Original Assignee: Robert L. Merker
• Inventors: Merker, Robert L.
• Application Number:
  US03/637,623
• Time in Patent Office: 1,089 Days
• US Class Current: 556/440
• CPC Class Codes: C07F 7/0838 Compounds with one or more Si-O-Si sequences compounds with a ring containing only alternating Si and O atoms, i.e. cyclosilanes C07F7/21
• CPC Class Codes: C07F 7/0889 Reactions not involving the Si atom of the Si-O-Si sequence
• CPC Class Codes: C08G 77/00 Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule

Claims

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.