NOVEL CRYSTAL GELS USEFUL AS DENTAL FLOSS WITH IMPROVED HIGH TEAR, HIGH TENSILE, AND RESISTANCE TO HIGH STRESS RUPTURE PROPERTIES

摘要

Novel gels and articles are formed from an intimate melt blend admixture of one or more of a linear or star-shaped multiblock copolymers having two or more midblock polymer chains and high levels of a plasticizing oil.PPThe gels can be transparent and have a novel combination of properties including unexpectedly high elongation and tensile strength and excellent shape retention after extreme deformation under high velocity impact and stress conditions. The gels of this invention are extremely soft, flexible, and have elastic memory, characterized by a gel rigidity of from about less than 2 gram to about 1, 800 gram Bloom and higher. These and other properties are particularly essential for the gels to have utility as composites, toys, therapeutic hand excercising grips, electrical and electronic encapsulation, shock absorbers, acoustical isolators, components for cushions, medical, sports medical, and many other uses. The gels are characterized by a rigidity of about 350 grams to about 1,800 gram Bloom, a tear resistance of at least about 1 Kg/cm, and strands of the gel are capable of flossing at least ten cycles without completely breaking apart as tested under fully contacting surfaces under a uniform spring load of 0.9027 Kg.