Search International and National Patent Collections
|1. (WO2018135748) MICROCELLULAR FOAMING POLYURETHANE ELASTOMER FOR JOUNCE BUMPERS AND METHOD FOR PREPARING SAME|
|Applicants:||SKC CO., LTD.
|Inventors:||YANG, Jae Soo
CHOI, Hee Young
JUNG, Ju Ai
|Title:||MICROCELLULAR FOAMING POLYURETHANE ELASTOMER FOR JOUNCE BUMPERS AND METHOD FOR PREPARING SAME|
An embodiment relates a microcellular foaming polyurethane elastomer for jounce bumpers and a method for preparing the same. The microcellular foaming polyurethane elastomer for jounce bumpers according to the embodiment has, because of a microcellular structure obtained through foaming using a prepolymer and a main ingredient, durability that can withstand repeated compressions during driving of an automobile and, in particular, exhibits a low height change rate and has excellent properties such as tensile strength, elongation, compression set, etc. even after repeated compressions, and thus can be usefully used for jounce bumpers. Also, according to the method for preparing a microcellular foaming polyurethane elastomer for jounce bumpers according to the embodiment, when preparing a prepolymer, the viscosity of the prepolymer is improved by reacting at a certain ratio: 4,4'-diphenylmethane diisocyanate; poly(oxytetramethylene)glycol or poly(caprolactone)glycol; and α-hydro-ω-hydroxypoly(oxypropylene) or α-hydro-ω-hydroxypoly(oxypropylene-co-oxyethylene), and thus the raw material can be handled easily, the storage stability of the prepolymer can be improved, and the height change rate of the elastomer can be maintained at 10% or less.