SIS thermoplastic elastomer is a block copolymersynthesized from two monomers of styrene (S) and isoprene (I). Because ofunique molecular structure, it has the characteristics of high flexibility,easy processing, easy to be mixed and mixed material can be reused. SIS iswidely used in adhesives, coatings, plastic modifiers, especially as the mainmaterial of hot-melt pressure sensitive adhesive.
Thetechnical index of SIS grades
items | SIS1001 | SIS1325 | SIS1244 |
structure | linear | linear | linear |
styrene/isoprene | 18/82 | 25/75 | 15/85 |
volatile matter，wt % | ≤0.7 | ≤0.7 | ≤0.7 |
solution viscosity in 25%toluene，cP | 600-800 | 300-400 | 400-500 |
Ahore Hardness A | 35-45 | 50-60 | 30-40 |
Antiager type | non-staining | non-staining | non-staining |
main application | tape, label, plastic modification | hot melt adhesive, plastic odification | hygiene products, diapers |
SIS for hot melt pressure sensitive adhesive
Thermoplastic elastomer SIS1001 is a linear three blockpolymer with styrene content of about 18%. SIS1001 is mainly used in thepreparation of pressure sensitive adhesive, covering the fields of medicaltreatment, electrical insulation, packaging, sign etc., particularly suitablefor preparation of hot melt adhesive using as adhesive tape, labels.
SIS1001 has completed the industrial trial production inSinopec Yanshan Petrochemical. The application results show that the SIS1001meets requirements of raw material of HMPSA; at the same time SIS in SBS/SISblend materials play a toughening effect, improving the processing performance,the relative elongation of materials, and reducing the hardness of thematerial. Adding SIS In SBS, the anti-aging performance of the product was significantlyimproved.
SIS for high flow adhesives
SIS1325 is a linear block copolymer containing certaintwo block structure. With special synthesis process, it has wide distributionwhich the proportion of the two-block in the polymer can be adjusted accordingthe design requirements effectively. The structure gives SIS1325 high cohesionstrength and high adhesion strength, and good compatibility with many kinds oftackifier. The pressure-sensitive adhesive prepared by the polymer has highinitial viscosity, good adhesion and high peel strength. And SIS1325 has lowsolution viscosity in 25% toluene, characteristics of being easy to spray, tocoat, more suitable for pressure sensitive adhesive and hot melt adhesivefield.
SIBS for high strength adhesives
Thermoplastic elastomer SIBS1244 is linear three blockcopolymer with styrene, isoprene and butadiene as monomers, mainly used in thepreparation of pressure sensitive adhesive and hot melt adhesive, coveringmedical, electrical insulation, packaging, labeling and other fields,especially suitable for hot melt adhesive tape and label preparation.
SIBS1244 has special three blockmolecular structure, bring good cohesiveness and physical strength with whichmake it an excellent binder or modifier or modified asphalt materials.