Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – By addition of entire unsaturated molecules – e.g.,...
Patent
1992-08-06
1993-05-11
Seidleck, James J.
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
By addition of entire unsaturated molecules, e.g.,...
585508, 526173, 526337, 526340, C07C 240, C08F29702
Patent
active
052103595
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.
REFERENCES:
patent: 3766215 (1973-10-01), Hesse et al.
patent: 3823109 (1974-07-01), Middlebrook
patent: 4116917 (1978-09-01), Eckert
patent: 4849481 (1989-07-01), Rhodes et al.
patent: 4996266 (1991-02-01), Bronn et al.
patent: 5011888 (1991-04-01), Tsutsumi et al.
patent: 5143990 (1992-09-01), Gibler et al.
Brosse et al., "Hydroxyl-Terminated Polymers Obtained by Free Radical Polymerization-Synthesis, Characterization and Applications," Advances in Polymer Science (Berlin, Heidelberg: Springer-Verlag, 1987), 167-220.
Falk, Journal of Polymer Science: Part A-1, vol. 9, 2617-2623 (1971).
Falk et al., Die Angewandte Makromelekulare Chemie 21 (1972), 17-23 (No. 286).
Mohajer et al., "Hydrogenated linear block copolymers of butadiene and isoprene: effects of variation of composition and sequence architecture on properties," Polymer, 1982, vol. 23, Sep., 1523-1535.
Coolbaugh Thomas S.
Loveless Frederick C.
Matthews Demetreos N.
Rudnick Leslie R.
Jagannathan Vasu S.
Keen Malcolm D.
McKillop Alexander J.
Mobil Oil Corporation
Santini Dennis P.
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