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Block copolymer, method of making the same, diamine precursors of the same, method of making such diamines and end products comprising the block copolymer

  • US 5,461,134 A
  • Filed: 12/05/1994
  • Issued: 10/24/1995
  • Est. Priority Date: 06/20/1986
  • Status: Expired due to Term
First Claim
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1. Organopolysiloxane diamine having a number average molecular weight of at least 5000 and containing less than 1.2% free silicone oil contamination and having the general formula:

  • ##STR7## where;

    R is at least 50% methyl with the balance of the 100% of all R radicals being selected from the group consisting of a monovalent alkyl radical having 2 to 12 carbon atoms, a substituted alkyl radical having 2 to 12 carbon atoms, a vinyl radical, a phenyl radical, and a substituted phenyl radical;

    Y is an alkylene radical of 1 to 10 carbon atoms;

    D is selected from the group consisting of hydrogen, an alkyl radical of 1 to 10 carbon atoms and phenyl;

    n is a number of about 70 or larger.

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