Bromination of Propargyl Methacrylate Polymers and Products Produced Thereby

Patent

Description

The process disclosed herein is the bromination of polymers of propargyl methacrylate and the brominated products produced thereby. Propargyl methacrylate has a terminal acetylenic group which upon bromination gives anethylenic dibromo derivative which is hydrolytically stable. In comparison the derivative obtained upon dibromination of a polymer of allyl methacrylate gives dibromopropyl methacrylate repeating units whereas the dibromonation of propargyl methacrylate gives dibromoallyl methacrylate repeating units. In view of the ethylenic group in the dibromoallyl radical, the bromine atoms are very resistant to hydrolysis whereas the bromine in the dibromopropyl radical is much more susceptible to hydrolysis. Moreover, the bromination of a terminal acetylenic group proceeds with much greater facility and more thoroughly under milder conditions than is the case when the acetylenic group is a non-terminal acetylenic such as 2-butyn-1-yl acrylate or methacrylate.

Attributes

Attribute NameValues
Title
  • Bromination of Propargyl Methacrylate Polymers and Products Produced Thereby

Patent Number
  • US 3562231 B2

USPTO Link
Inventor
  • Gaetano Francis D'Alelio

Inventor From Local Institution
  • Gaetano Frank D'Alelio

Other Application
  • 740,862

Claims
  • 9

Classification (US Patent)
  • 525/328.1; 525/356; 526/173; 526/285; 526/75; 560/225;

Cooperative Patent Classification codes
  • C08F 8/20 (20130101); C08F 8/20 (20130101); C08F 246/00 (20130101)

International Patent Classification codes
  • C08F 8/00 (20060101); C08F 8/20 (20060101)

Language
  • eng

Date Issued
  • 1971-02-09

Publisher
  • United States Patent and Trademark Office

Assignee
  • Geigy Chemical Corporation

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