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US 8,772,415 B2Granted
Hydrogenated block copolymers and crosslinking compositions containing the same
AssigneeAsahi Kasei Chemicals Corporation
InventorsYasuhiro Kusanose, Masahiro Fujiwara, Daisuke Shimizu
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Abstract
The disclosure provides a hydrogenated straight-chain block copolymer, obtained by selective hydrogenation of a straight-chain block copolymer.
Claims26
A hydrogenated straight-chain block copolymer, obtained by selective hydrogenation of a straight-chain block copolymer comprising:
- i. at least two polymer blocks A, on both terminals thereof, which each comprise a vinyl aromatic monomer unit as a main component and which may be the same or different from each other;
- ii. at least two polymer blocks B, internally in relation to the polymer blocks A, which each comprise a conjugated diene monomer unit having 5 or more carbon atoms as a main component and which may be the same or different from each other;
- and
- iii. one or more polymer blocks selected from
- a. one or more polymer blocks C which each comprise a conjugated diene monomer unit having 4 or more carbon atoms as a main component and which may be the same or different from each other,
- b. one or more random copolymer blocks D which each comprise a conjugated diene monomer unit having 4 or more carbon atoms (d-1) and a vinyl aromatic monomer unit (d-2) as main components and which may be the same or different, and
- c. a combination of the polymer blocks C and D,
- wherein:
- a. the polymer block A has a weight-average molecular weight M of 21,000 or more;
- b. the polymer block B has a hydrogenation rate of 50% or less for olefinic unsaturated double bonds;
- c. the polymer blocks C and D have a hydrogenation rate of 80% or more for olefinic unsaturated double bonds;
- d. the block copolymer comprises 10% by weight to 85% by weight of the vinyl aromatic monomer unit;
- e. the block copolymer has contents of 10% by weight to 70% by weight of A, 1% by weight to 15% by weight of B, 0% by weight to 85% by weight of C, 0% by weight to 85% by weight of D and 25% by weight to 85% by weight of C+D, based on 100% by weight of the total of A+B+C+D;
- and
- f. the A, B, C, and D are arranged linearly.
12 more elements
A method of manufacturing a dynamic crosslinking composition comprising selectively hydrogenating a straight-chain block copolymer comprising:
- at least two polymer blocks A which each comprise a vinyl aromatic monomer unit as a main component and which may be the same or different from each other;
- at least two polymer blocks B which each comprise a conjugated diene monomer unit having 5 or more carbon atoms as a main component and which may be the same or different from each other;
- and
- one or more polymer blocks C which each comprise a conjugated diene monomer unit having 4or more carbon atoms as a main component and which may be the same or different from each other;
- and/or one or more random copolymer blocks D which each comprise a conjugated diene monomer unit having 4 or more carbon atoms (d-1) and a vinyl aromatic monomer unit (d-2) as main components and which may be the same or different,
- wherein the polymer block A has a weight-average molecular weight M of 21,000 or more;
- the polymer block B has a hydrogenation rate of 50% or less for olefinic unsaturated double bonds;
- the polymer blocks C and D have a hydrogenation rate of 80% or more for olefinic unsaturated double bonds;
- the block copolymer comprises 10% by weight to 85% by weight of the vinyl aromatic monomer unit;
- the block copolymer has contents of 10% by weight to 70% by weight of A, 1% by weight to 15% by weight of B, 0% by weight to 85% by weight of C, 0% by weight to 85% by weight of D and 25% by weight to 85% by weight of C+D, based on 100% by weight of the total of A+B+C+D;
- and
- the A, B, C, and D are arranged linearly.
9 more elements
Dependencies are inferred from the claim text.