Armstrong, Westerman, Hattori, McLeland & Naughton, LLP
Hot melt composition and use thereof
 A hot melt composition including 100 parts by weight of a styrene thermoplastic elastomer having an intrinsic viscosity [.eta.] of not less than 1 dl/g and 200 to 3000 parts by weight of a liquid softener selected from process oil, liquid rubber and a modified substance thereof, wherein: PA1 (a) the composition has a softening point measured by ring and ball softening pint method of from 120 to 230.degree. C.; PA1 (b) the composition generates no crack when not less than 75% of a compressive strain is applied under an atmosphere of a temperature of -30 to 40.degree. C.; and PA1 (c) the composition does not flow when it is allowed to stand in a load-free state under an atmosphere of a temperature of 100.degree. C. for 24 hours. When the amount of the liquid softener mixed is from 500 to 1200 parts by weight, the composition is particularly useful for industrial sealing material, and when the amount is from 1200 to 3000 parts by weight, the composition is particularly useful for buffer material or vibration isolating material. 
Asahi Chemical Synthetic Co., Ltd.
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C09J C09J C09J C08L
inventional inventional inventional inventional
Ryotaro Jun-ichi Yasuhito Tomo Mitsuru
Nozaki Nakayama Suzuki Iwata Sakashita