Kraton: trade name copolymer

Kraton Trade name for an ABA block copolymer of styrene and butadiene. 

The hydrogenation of the centre block of SBS copolymer produced oxidation stable thermoplastic elastomer. This product was commercialized by the Shell Development Company under the trade name of Kraton G. The field of thermoplastic elastomers based on styrene, 1-3-butadiene or isoprene has expanded so much in the last 10 years that the synthetic rubber chemist produced more of these polymers than the market could handle. However, the anionically prepared thermoplastic system is still the leader in this field, since it produced the best TPR s with the best physical properties. These TPR s can accommodate more filler, which reduces the cost. For example, the SBS Kraton type copolymer varies the monomer of the middle block to produce polyisoprene at various combinations, then, followed... 

The actual temperature acquired by the sample during pyrolysis can be monitored using optical pyrometry or can be standardized between different pyrolyzers using a model compound. The procedure is based on the dependence of the composition of the pyrolysis products on temperature. One such compound chosen as a standard is an isoprene/styrene copolymer, trade name Kraton 1107 [15] (see Section 4.2). 

The Shell Kraton thermoplastic rubbers are based on S-B-S, S-I-S, and S-EB-S. Applications include adhesives, footwear, mechanical goods, and automotive applications. Shell also manufactures S-EP block copolymers under the Shellvis trade name. These are used as viscosity index improvers in lubricating oils. 

Block copolymers can also be hydrogenated to produce unique products. Hydrogenated triblock copolymers of poly(styrene-co-butadiene-co-styrene) (SBS) are commercially available from the Shell Company under the trade name Kraton G. The middle block is usually a mixed microstructure of poly( 1,2-butadiene) and poly( 1,4-butadiene) units. The resulting product is a hydrogenated unsaturated polymer, which exhibits greater thermal and oxidative properties than the parent SBS triblock. 

Multi-Flex TPE G 7680 [Multibase http //www.multibase.com], Multi-Flex TPE G 7890 [Multibase http //www.multibase.com], Multi-Flex TPE G 7940 t[Multibase http //www.multibase.com], Multi-Flex TPE RP-6568 B2 [Multibase http //www.multibase.com], Multi-Flex TPE RP-6568 C [Multibase http //www.multibase. com] Styrene-ethylene-propylene block copolymer Uses Thermoplastic elastomer used as a modifier in solv.-based weatherable sealants Trade Name Synonyms Kraton G 1701 t[Kraton Polymers http //www.kraton.com], Kraton G 1701X [Kraton Polymers http //www.kraton.com]-, Kraton G 1702X [Kraton Polymers http //www.kraton.com]... 

In 1965 Shell Oil Co. introduced styrenic TPEs, under the trade name Kraton, which are polystyrene-b-polyisoprene(or polybutadiene)- -polystyrene (PS-b-PI(or PBd)- -PS linear triblock copolymers, made by anionic polymerization. Later, BASF introduced styrenic PTEs having tapered blocks (i.e., Styroflex). The typical styrene content of TPEs is between 25 and 40wt.%. When more stable TPEs, toward oxygen. 

Materials. Nanocomposites from metallocene polypropylene (HM562S, Lyondell-Basell) and nanoclay (hydrophilic montmorillonite, MMT) are studied. The MMT is obtained from Laviosa Chimica Mineraria, Italy (3.8 wt.-% aq. dispersion of montmorillonite). A compatibilizer is added to two of the materials in order to intercalate the MMT. The compatibilizer is an amphiphilic block copolymer (ABC) made by atom-transfer radical polymerization (ATRP) [3, 4]. It consists of a hydrophobic block of hydrogenated polybutadiene, i.e. poly(ethylene-co-1,2-butylene) monoalcohol (trade name Kraton L-1203 from Kuraray Co., Japan) with molecular weight 7000 and PDI = 1.05, and a hydrophilic block of quaternized dimethylaminoethyl methacrylate. Modified nanoclays with 4.7 and 8.0wt.-% of the ABC have been prepared. Table2.1 describes the composition of the studied materials. Sample PP is the pure polypropylene. Sample PP+MMT is a blend of polypropylene and the freeze-dried hydrophilic MMT. The samples PP+lcMMT and PP+hcMMT are composites that contain MMT with low compatibilizer amounts and high compatibilizer amounts, respectively. In order to prepare the nanocomposites, modified IcMMT and hcMMT have first been freeze-dried and, second, blended" with the PP. 

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