Page 41 - Plastics News September 2021

PRoDUCT NEwS

1.5% MA grafting ratio results level to lead to thixotropic greases. In Conclusion
in excellent adhesion to metal this case, the polystyrene endblock LCY GRIT has developed advanced
or polar substrates, excellent segments with extended rubber arms to manufacturing technologies to produce
compatibility with engineering form micelle-like domains to create the high performance SBC polymers with
plastics to improve low temperature thixotropic properties. high precision. Currently, we offer a
impact strength. SEBS-g-MAH as broad selection of low/middle molecular
compatibilizer could enhance the weight HSBC product lines for special
tensile mechanical properties as well adhesive, sealant, coating, oil-gel
as dynamic mechanical properties. formulations and plastics modification.

Styrenic block copolymers (SBC) have a These products are highly compatible
two-phase structure composed of hard with PO, PP, PE, EVA plastics, and also
endblocks and softer rubber midblocks. offer product and process optimization.
The rubber blocks of HSBCs are very A blend of HSBC/PP has excellent We plan to further develop polymers that
compatible with mineral oils. When a UV, ozone and chemical resistance and provide new solutions in sustainability
triblock HSBC is added to oils at sufficient exhibits several advantages over flexible and efficiency for our customers.
quantities, the triblock structure causes PVC used in medical applications.
oils to solidify, which results in flexible, The greater advantage is that HSBC/
strong, solid oil gels with adhesive PP blends are lighter than most other
properties and tackiness. The midblock thermoplastic materials.
segments provide elasticity. The diblock They pose no known risk to health and
SEB copolymer results in balanced environment during processing and can
cohesive and adhesive properties.
be easily recycled. PVC, on the other
HSBCs with Ethylene/Propylene(EP) hand, releases hazardous chemicals like
structures, such as GP-8501U, are used at dioxins at process temperatures and can
low concentration levels as thickeners for be difficult to recycle when blended with
paraffinic oils to impart shear-thinning other polymers.
behavior. It can also be added at higher

41 PLASTICS NEWS SEPTEMBER 2021