Patent ID: 8093323

Claim:
A method for manufacturing a mixture which is liquid at ambient temperature and comprises a bis(silatranylalkyl) polysulfide represented by the general formula (3): N(CH 2 CH 2 O) 3 SiRS x RSi(OCH 2 CH 2 ) 3 N (3) wherein R is an alkylene group having 1 to 10 carbon atoms and “x” is a number from 2 to 8, and a (silatranylalkyl)(trialkoxysilylalkyl) polysulfide represented by the general formula (4): N(CH 2 CH 2 O) 3 SiRS x RSi(OR 1 ) 3 (4) wherein R and “x” are the same as defined above, and R 1 is an alkyl group having 1 to 4 carbon atoms, the method being characterized by heating a bis(trialkoxysilylalkyl) polysulfide represented by the general formula (1): (R 1 O) 3 SiRS x RSi(OR 1 ) 3 (1) wherein R, R 1 , and “x” are the same as defined above, and a triethanolamine represented by the formula (2): (HOCH 2 CH 2 ) 3 N (2) wherein the ratio of the triethanolamine to the bis(trialkoxysilylalkyl) polysulfide is less than 2.0 moles of the triethanolamine per 1 mole of the bis(trialkoxysilylalkyl) polysulfide, and wherein the bis(trialkoxysilylalkyl) polysulfide and the triethanolamine are heated in the presence of an alkali metal alcoholate used in a catalytic quantity, thus substituting a part of the Si-bonded (OR 1 ) 3 groups of the bis(trialkoxysilylalkyl) polysulfide with a group represented by the formula: (OCH 2 CH 2 ) 3 N.