LOW VISCOSITY POLYTHIOL AND METHOD THEREFOR

摘要

A method and composition for decreasing the viscosity of mercaptan terminated polymers. The method involves adding thiol terminated trithio-orthoformate polycondensates to the mercaptan terminated polymer to achieve desired decreases in viscosities without adversely affecting other physical properties. The polycondensates have the formula: (HS-R-S)2CH-S-R'-S[-CH(-S-R"-S)2-]n(H)x, wherein R, R', and R" are alkylene, arylene, alkylene thioether, or alkylene ether, either the same or different; n is 0-10; and x is n + 1.