Patent ID: 8039561

Claim:
A method for the preparation of a reaction product consisting essentially of a silicon-containing polysulfide-type polymer having the following formula: where R 1 is an alkoxyalkylene group or a monovalent hydrocarbon group with 1 to 10 carbon atoms; R 2 is a monovalent hydrocarbon group with 1-15 carbon atoms, other than monovalent hydrocarbon groups having an aliphatic unsaturated bond; R 3 is selected from an alkylene group with 2 to 10 carbon atoms, an arylene group with 6 to 10 carbon atoms, an alkylenoxyalkylene group with 2 to 10 carbon atoms, or a divalent organic group of formula: —R 8 (OR 8 ) m — where R 8 are the same or different alkylene groups with 1 to 10 carbon atoms, and “m” is an integer between 2 and 20, and a hydroxy-substituted alkylene group with 3 to 12 carbon atoms; R 4 is a residue formed in an addition reaction of the aliphatic unsaturated bond contained in component (A) given below to a hydrogen atom of the mercapto group of below-given component (B); “a” is an integer between 0 and 3; “x” is a number which on average is greater than 1 and smaller than 8 or equal to 8; and “n” is a number with a mean value between 1 and 120, said method characterized by simultaneously mixing (A) a silicon-containing compound having a silicon atom-bonded monovalent organic group with an aliphatic unsaturated bond; (B) a polysulfide polymer with at least two mercapto groups in one molecule; and (C) triethylamine used in an amount of 0.01 to 10 mole % relative to said component (A); said simultaneous mixing being carried out in the presence of (D) sulfur used in such an amount that sulfur atoms constitute 1 to 600 mole % relative to 1 mole of the repeating units (S x R 3 ) in said silicon-containing polysulfide-type polymer.