Butadiene polymers having terminal functional groups
View Patent ↗Hydrogenated butadiene polymers having terminal functional groups have minimum viscosity at any molecular weight when the 1,2-addition is between 30% and 70% Hydrogenated butadiene polymers having about two terminal hydroxyl groups per molecule have surprisingly lower viscosities at 30% to 70% 1,2-addition than similar polymers having either higher or lower amounts of 1,2-addition. The polymers are useful in making coatings, sealants, binders, and block copolymers with polyesters, polyamides, and polycarbonates.
1. A polymer composition, produced by the steps of:
reacting one or more compounds with the terminal functional groups on a polymer, and said polymer consists essentially of:
polymerized 1,3-butadiene having a peak molecular weight between 500 and 20,000, 1,2-addition between 30% and 70%, and hydrogenation of at least 90% of the unsaturation;
a ratio of viscosity ( in poise at room temperature ) to peak molecular weight raised to the 3 . 4 power of at most 2 . 0 times 10 −9 ; and
one about two or more terminal functional groups per molecule.
2. The polymer composition of claim 1 6 , wherein the terminal functional groups of the polymer are selected from a the group consisting of hydroxyl, carboxyl, phenol, epoxy, and amine groups.
3. The polymer of claim 2 , wherein the polymer has a ratio of viscosity (poise at room temperature) to peak molecular weight raised to the 3.4 power of at most 2.0×10 −9 .
4. The polymer composition of claim 3 6 , wherein the polymerized 1 , 3 -butadiene has a peak molecular weight between 1,000 and 10,000.
5. The polymer composition of claim 4 , wherein the polymerized 1 , 3 -butadiene is at least 95% hydrogenated.
6. The polymer composition of claim 5 1 , wherein the ratio of viscosity to peak molecular weight raised to the 3.4 power of the polymer is less than 1.0 × times 10 −9 .
7. The polymer composition of claim 6 , wherein the terminal functional groups of the polymer consist of about two hydroxyl groups per molecule.
8. The polymer composition of claim 1 , wherein the peak molecular weight of the polymer is between 1000 and 10000.
9. The polymer composition of claim 8 6 , wherein the 1,2-addition of the polymerized 1 , 3 -butadiene is between 40% and 60%.
10. The polymer composition of claim 1 , wherein the polymerized 1,3-butadiene has about two hydroxyl groups per molecule.
11. The polymeric polymer composition of claim 10 , wherein the polymerized 1,3-butadiene is reacted with compounds that form a coating.
12. The polymeric polymer composition of claim 10 , wherein the polymerized 1,3-butadiene is reacted with compounds that form a block selected from the group consisting of polyesters, polyamides, and polycarbonates.
13. The polymer composition of claim 8 wherein the polymer has a peak molecular weight of about 10 , 000 .
14. The polymer composition of claim 8 wherein the polymer has a peak molecular weight of about 5 , 000 .
15. The polymer composition of claim 8 wherein the polymer has a peak molecular weight of about 3 , 000 .
16. The polymer composition of claim 8 wherein the polymer has a peak molecular weight of about 2 , 000 .
17. The polymer composition of claim 4 wherein the polymer has a peak molecular weight of about 10 , 000 .
18. The polymer composition of claim 4 wherein the polymer has a peak molecular weight of about 5 , 000 .
19. The polymer composition of claim 4 wherein the polymer has a peak molecular weight of about 3 , 000 .
20. The polymer composition of claim 4 wherein the polymer has a peak molecular weight of about 2 , 000 .
21. The polymer composition of claim 1 wherein the polymerized 1 , 3 - butadiene has 1 . 7 terminal functional groups per molecule.
22. The polymer composition of claim 1 wherein the polymerized 1 , 3 - butadiene has 1 . 9 terminal functional groups per molecule.