Low viscosity polythiol and method therefor
AssigneeCourtaulds Aerospace, Inc.
InventorsRandy Cameron, Jonathan Zook
Life of this patent
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Abstract
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--).sub.2 CH--S--R'--S[--CH(--S--R"--S).sub.2 --].sub.n (H).sub.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.
Claims28
A composition of matter comprising a thiol terminated trithio-orthoformate containing polycondensate having the formula
- (HS--R--S--).sub.2 CH--S--R'--S[--CH(--S--R"--S).sub.2 --].sub.N (H).sub.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.
In a mercaptan terminated polymer wherein said mercaptan terminated polymer is applied as a flowable material having a viscosity, the improvement comprising adding a sufficient amount of thiol terminated trithio-orthoformate containing polycondensate to said thiol terminated polymer to decrease the viscosity of said polymer, said polycondensate having the formula
- (HS--R--S--).sub.2 CH--S--R'--S[--CH(--S--R"--S)2--].sub.N (H).sub.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.
A method for decreasing the viscosity of a mercaptan terminated polymer, said method comprising the steps of adding to said polymer a sufficient amount of thiol terminated trithio-orthoformate containing, said polycondensate to decrease the viscosity of said polymers, said polycondensate having the formula
- (HS--R--S--).sub.2 CH--S--R'--S[--CH(--S--R"--S).sub.2 --].sub.N (H).sub.X
- R, R', and R" and alkylene, arylene, alkylene thioether, or alkylene ether, either the same or different;
- N is 0-10;
- and X is N+1.
Dependencies are inferred from the claim text.