US5225472A
Expired / Lapsed
US
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Low viscosity polythiol and method therefor
Assignee: PRC Desoto International Inc
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Filing: 1992-05-19
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Granted: 1993-07-06
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Expires: 2012-05-19
Abstract
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.
Inventors
- 👤 Randy Cameron
- 👤 Jonathan Zook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:53
CPC Classifications
C; C07; C07C; C07C321/00; C07C321/12; C07C321/14; C07C323/00; C07C323/10; C07C323/11; C07C323/12; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
43 words
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.
Claim 2
Dependent Claim
43 words
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.
Claim 3
Dependent Claim
15 words
A composition of matter according to claim 1 wherein R and R' are the same.
Claim 4
Dependent Claim
15 words
A composition of matter according to claim 1 wherein R and R" are the same.
Claim 5
Dependent Claim
15 words
A composition of matter according to claim 1 wherein R' and R" are the same.
Claim 6
Dependent Claim
17 words
A composition of matter according to claim 2 wherein R" is the same as R and R'.
Claim 7
Dependent Claim
23 words
A composition of matter according to claim 1 wherein R, R' or R" are CH 2 CH 2 --S--CH 2 CH 2 .
Claim 8
Dependent Claim
27 words
A composition of matter according to claim 1 wherein R, R' or R" are CH 2 --CH 2 --O--CH 2 --CH 2 --O--CH 2 CH 2 .
Claim 9
Dependent Claim
15 words
A composition of matter according to claim 6 wherein n is from 0 to 3.
Claim 10
Dependent Claim
15 words
A composition of matter according to claim 7 wherein n is from 0 to 3.
Claim 11
Dependent Claim
26 words
A composition of matter according to claim 5 wherein R, R' or R" are CH 2 CH 2 --S--CH 2 CH 2 and n is 0.
Claim 12
Dependent Claim
30 words
A composition of matter according to claim 5 wherein R, R' or R" are CH 2 --CH 2 --O--CH 2 --CH 2 --O--CH 2 CH 2 and n is 0.
Claim 13
Dependent Claim
23 words
A composition of matter according to claim 1 which further includes from about 1 to 99 weight percent of a mercaptan terminated polymer.
Claim 14
Dependent Claim
15 words
A composition of matter according to claim 12 wherein R and R' are the same.
Claim 15
Dependent Claim
15 words
A composition of matter according to claim 12 wherein R and R" are the same.
Claim 16
Dependent Claim
15 words
A composition of matter according to claim 12 wherein R' and R" are the same.
Claim 17
Dependent Claim
17 words
A composition of matter according to claim 13 wherein R" is the same as R and R'.
Claim 18
Dependent Claim
29 words
A composition of matter according to claim 12 wherein R, R' and R" are CH 2 CH 2 --S--CH 2 CH 2 and n is from 0 to 3.
Claim 19
Dependent Claim
33 words
A composition of matter according to claim 12 wherein R, R' and R" are CH 2 --CH 2 --O--CH 2 --CH 2 --O--CH 2 CH 2 and n is from 0 to 3.
Claim 20
Dependent Claim
26 words
A composition of matter according to claim 16 wherein R, R' and R" are CH 2 CH 2 --S--CH 2 CH 2 and n is 0.
Claim 21
Dependent Claim
30 words
A composition of matter according to claim 16 wherein R, R' and R" are CH 2 --CH 2 --O--CH 2 --CH 2 --O--CH 2 CH 2 and n is 0.
Claim 22
Dependent Claim
77 words
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.
Claim 23
Dependent Claim
77 words
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.
Claim 24
Dependent Claim
37 words
An improved mercaptan terminated polymer according to claim 21 wherein said polymer is selected from the group consisting of mercaptan terminated polythioether, mercaptan terminated polysulfide, mercaptan terminated polythioether/polysulfide copolymer, mercaptan terminated polyether polyurethane and mercaptan terminated polyether.
Claim 25
Dependent Claim
25 words
An improved mercaptan terminated polymer according to claim 22 wherein R, R' and R" are CH 2 CH 2 --S--CH 2 CH 2 and n=0.
Claim 26
Dependent Claim
29 words
An improved mercaptan terminated polymer according to claim 22 wherein R, R' and R" are CH 2 --CH 2 --O--CH 2 --CH 2 --O--CH 2 CH 2 and n=0.
Claim 27
Independent Claim
71 words
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.
Claim 28
Independent Claim
71 words
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.
Claim 29
Dependent Claim
34 words
A method according to claim 25 wherein said polymer is selected from the group consisting of mercaptan terminated polythioether, mercaptan terminated polysulfide, mercaptan terminated polythioether/polysulfide copolymer, mercaptan terminated polyether polyurethane, and mercaptan terminated polyether.
Claim 30
Dependent Claim
22 words
A method according to claim 25 wherein R, R' and R" are CH 2 CH 2 --S--CH 2 CH 2 and n=0.
Claim 31
Dependent Claim
26 words
A method according to claim 25 wherein R, R' and R" are CH 2 --CH 2 --O--CH 2 --CH 2 --O--CH 2 CH 2 and n=0.
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