US 5,210,359 A · Vulcanizable liquid compositions

Abstract

There is disclosed a linear block copolymer comprising at least one triblock I-B-I, wherein I is a block of at least one polymerized conjugated diene of at least five (5) carbon atoms, such as isoprene, and B is a block of a polymer of at least one conjugated diene, different from that used to polymerize the block I, of at least four (4) carbon atoms, such as 1,3-butadiene. The B block is selectively hydrogenated, while each of the I blocks is unhydrogenated and therefore retains a sufficient amount of its original unsaturation to vulcanize the copolymer. There is also disclosed an alternative linear block copolymer containing at least one triblock of the first polymer block made from a minor proportion of at least one aryl-substituted olefin, such as styrene, and a major proportion of at least one conjugated diene used to polymerize the block I, the second middle polymer block of at least one diene used to polymerize the block B, and the third polymer block which is the same as the first polymer block. There are also disclosed random linear and star-branched block and random copolymers made from the same monomers as the linear block copolymers.

Claims9

Dependent claims

A liquid star-branched block polymer comprising at least two alternating blocks

I--B
wherein each free end of the polymer is an I block, and
I is a block of at least one polymerized conjugated diene having at least five (5) carbon atoms and the following formula ##STR12## wherein R.sup.1 -R.sup.6 are each hydrogen or a hydrocarbyl group, provided that at least one of R.sup.1 -R.sup.6 is a hydrocarbyl group and provided that the structure of the residual double bond in the polymerized block I has the following formula ##STR13## wherein R.sup.I, R.sup.II, R.sup.III and R.sup.IV are each hydrogen or a hydrocarbyl group, provided that either both R.sup.I and R.sup.II are hydrocarbyl groups or both R.sup.III and R.sup.IV are hydrocarbyl groups;
B is a block of a polymer of at least one conjugated diene different from the diene used to polymerize the block I, having at least four (4) carbon atoms and the following formula ##STR14## wherein R.sup.7 -R.sup.12 are each hydrogen or a hydrocarbyl group, provided that the structure of the residual double bond in the polymerized block B has the following formula ##STR15## wherein R.sup.a, R.sup.b, R.sup.c and R.sup.d are each hydrogen (H) or a hydrocarbyl group, provided that one of R.sup.a or R.sup.b is hydrogen, one of R.sup.c or R.sup.d is hydrogen and at least one of R.sup.a, R.sup.b, R.sup.c or R.sup.d is a hydrocarbyl group.

1 more element

A liquid star-branched block polymer comprising at least three alternating blocks

I--D--A
wherein each free end of the polymer is either an I or an A block, and
I is a block of at least one polymerized conjugated diene having at least five (5) carbon atoms and the following formula ##STR20## wherein R.sup.1 -R.sup.6 are each hydrogen or a hydrocarbyl group, provided that at least one of R.sup.1 -R.sup.6 is a hydrocarbyl group and provided that the structure of the residual double bond in the polymerized block I has the following formula ##STR21## wherein R.sup.I, R.sup.II, R.sup.III and R.sup.IV are each hydrogen or a hydrocarbyl group, provided that either both R.sup.I and R.sup.II are hydrocarbyl groups or both R.sup.III and R.sup.IV are hydrocarbyl groups;
D is a block polymer of a conjugated diene, different from that used to polymerize the blocks I or A, having at least four (4) carbon atoms and the following formula ##STR22## wherein R.sup.7 -R.sup.12 are each hydrogen or a hydrocarbyl group, provided that the structure of the residual double bond in the polymerized block D has the following formula ##STR23## wherein R.sup.a, R.sup.b, R.sup.c and R.sup.d are each hydrogen (H) or a hydrocarbyl group, provided that one of R.sup.a or R.sup.b is hydrogen, one of R.sup.c or R.sup.d is hydrogen and at least one of R.sup.a, R.sup.b, R.sup.c or R.sup.d is a hydrocarbyl group;
A is a copolymer of about 30 to about 70% by mole of at least one aryl-substituted olefin and about 30 to about 70% by mole of at least one conjugated diene of formula (1), different from that used to polymerize the block D, having at least five (5) carbon atoms and the following formula ##STR24## wherein R.sup.1 -R.sup.6 are each hydrogen or a hydrocarbyl group, provided that at least one of R.sup.1 -R.sup.6 is a hydrocarbyl group and provided that the structure of the residual double bond in the polymerized block I has the following formula ##STR25## wherein R.sup.I, R.sup.II, R.sup.III and R.sup.IV are each hydrogen or a hydrocarbyl group, provided that either both R.sup.I and R.sup.II are hydrocarbyl groups or both R.sup.III and R.sup.IV are hydrocarbyl groups.

2 more elements

Dependencies are inferred from the claim text.

Vulcanizable liquid compositions

Life of this patent

Vulcanizable liquid compositions

Life of this patent

Abstract

Claims9