Disclosed herein in is a medical tube comprising a hydrogenated styrenic block copolymer having a formula A-B-A, (A-B-A).sub.nX or (A-B).sub.nX is disclosed, where n is an integer from 2 to 30, and X is residue of a coupling agent. Prior to hydrogenation, each A block is a monoalkenyl arene homopolymer block having a true peak molecular weight of 5 kg/mol to 15 kg/mol. Each B block is a controlled distribution copolymer block having a true peak molecular weight of 30 kg/mol to 200 kg/mol. The hydrogenated styrenic block copolymer has a midblock poly(monoalkenyl arene) content of 35 wt. % to 50 wt. % based on the total weight of the midblock, and physical properties that makes it useful for producing medical tubes having kink resistance.

The conjugated diene-based polymer has a Mooney viscosity measured at 100° C. of 40 or more and 170 or less, has Mooney stress relaxation measured at 100° C. of 0.35 or less, and has a branch number (Bn) measured by viscosity detector-equipped GPC-light scattering measurement of 8 or more.

A thermoplastic polymer composition (I) comprising: (A) block copolymer A comprising A1: 60 to 95 wt.-% vinyl aromatic monomer, and A2: 5 to 40 wt.-% conjugated diene; (B) a stabilizer combination consisting of: B1: 200 to 2500 ppm 2,6-di-tert-butyl-4-(4,6-bis(octylthio)-1,3,5-triazin-2-ylamino) phenol, B2: 500 to 2500 ppm 2-[1-(2-hydroxy-3,5-di-tert-pentylphenyl)ethyl]-4,6-di-tert-pentylphenyl acrylate and/or 2-tert-butyl-6-(3-tert-butyl-2-hydroxy-5-methylbenzyl)-4-methylphenyl acrylate, and B3: 500 to 2000 ppm tris(2,4-di-tert.-butylphenyl)phosphite; (C) 0 to 5000 ppm stabilizers different from (B1), (B2) and (B3); (D) optionally additives and/or processing aids other than (B) and (C), (E) optionally thermoplastic polymer TP other than block copolymer A, a process for its preparation, and its use for the preparation of shrink films is described.

Provided is a binder composition for a non-aqueous secondary battery electrode with which it is possible to form a slurry composition for a non-aqueous secondary battery electrode having excellent stability and an electrode for a non-aqueous secondary battery having excellent peel strength after thermal drying. The binder composition for a non-aqueous secondary battery electrode contains a particulate polymer A and a particulate polymer B. The particulate polymer A includes: a backbone portion formed of a block copolymer that includes an aromatic vinyl monomer unit and an aliphatic conjugated diene monomer unit; and a graft portion. The particulate polymer B includes an aliphatic conjugated diene monomer unit in a proportion of 70.0 mass % or more and includes a graft portion.

Polar modifier systems based on a blend of DTHFP, ETE, TMEDA, DMTHFMA and/or functionally similar compounds with BDMAEE and SMT are used to make block copolymers having high levels of pendant vinyl double bond repeat units, which is through highly selective 1,2-bond butadiene addition, low vinylcyclopentane formation, unimodal narrow molecular weight distribution, and a low level of randomized co-monomer repeat units. The block copolymers have very high levels of 1,2-vinyl content and high 3,4-vinyl bond addition of the conjugated diene monomer and low vinylcyclopentane content. The polar modifier systems provide a fast polymerization rate, with a unimodal narrow molecular weight distribution. The polar modifier systems allow operation at a higher temperature than in prior art systems, which reduces cooling requirements.

Disclosed herein are linear block copolymers of formula A-B-A′ or A-B*B-A′, wherein blocks A and A′ are polystyrene blocks, block B is a poly(conjugated diene) block and * is a coupling agent having a vinyl content of from 10-60 mol %. The block copolymers have a polystyrene content of from 20-35 wt. %, relative to the overall weight of the block copolymer, and a molecular weight of from 200,000-300,000 g/mol. The block copolymers can be used with a wide variety of asphalt grades, and are valuable for producing homogeneous polymer modified asphalt compositions having an effective combination of performance properties, such as acceptable viscosity, good elastic response to an applied stress, and a low non-recoverable creep compliance. The combination of vinyl content and polymerization technology allows a high solution concentration during polymerization without excessive processing viscosity.

A binder composition contains a particulate polymer including a graft portion and a backbone portion formed of a block copolymer including an aromatic vinyl monomer unit and an aliphatic conjugated diene monomer unit. An aromatic vinyl block region included in the block copolymer has a weight-average molecular weight of 15,000 or more, the block copolymer has a weight-average molecular weight of not less than 150,000 and not more than 500,000, and the graft portion constitutes a proportion of not less than 1.0 mass % and not more than 10.0 mass % relative to 100 mass % of the block copolymer.

A method of preparing a block copolymer composition is provided. The method includes: adding an aromatic vinyl monomer and a compound represented by Chemical Formula 1 to a hydrocarbon-based solvent and performing stirring to prepare a first mixed solution; adding a polymerization initiator to the first mixed solution and performing polymerization to prepare a second mixed solution; adding a conjugated diene-based monomer to the second mixed solution and performing polymerization to prepare a third mixed solution; and adding a coupling agent to the third mixed solution to perform a coupling reaction, An asphalt composition including the block copolymer composition prepared therefrom, is also provided.

To provide a waterproof sheet for civil engineering, having sufficient strength and elongation even at a low temperature of about −10° C. and having excellent adhesiveness to a structure such as a tunnel. Disclosed is a waterproof sheet for civil engineering, which has a layer (A) including a composition containing an ethylene-vinyl acetate copolymer (a1) and a thermoplastic resin (a2) other than the ethylene-vinyl acetate copolymer (a1), and a silica-containing layer containing silica, wherein the content of the ethylene-vinyl acetate copolymer (a1) in the composition is 30 to 95% by mass, the content of the thermoplastic resin (a2) is 5 to 70% by mass, and the absolute value of the difference between the SP value of the ethylene-vinyl acetate copolymer (a1) and the SP value of the thermoplastic resin (a2) is less than 0.70 (cal/cm.sup.3).sup.1/2.

The present disclosure relates to a composition having a structure defined by

##STR00001##

, where symbolizes a covalent bond to a neighboring atom, R.sub.2 is a functional group derived from at least one of a homocyclic molecule, a heterocyclic molecule, a polycyclic molecule, an aliphatic molecule, and/or an organo-phosphorous molecule, 1 ≤ x ≤ 1000, and 2 ≤ z ≤ 1000.