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1. (WO2018135748) MICROCELLULAR FOAMING POLYURETHANE ELASTOMER FOR JOUNCE BUMPERS AND METHOD FOR PREPARING SAME

Pub. No.:    WO/2018/135748    International Application No.:    PCT/KR2017/014209
Publication Date: Fri Jul 27 01:59:59 CEST 2018 International Filing Date: Thu Dec 07 00:59:59 CET 2017
IPC: C08G 18/10
C08J 9/00
C08G 18/08
C08G 18/40
B60G 11/22
C08G 101/00
Applicants: SKC CO., LTD.
에스케이씨 주식회사
Inventors: YANG, Jae Soo
양재수
CHOI, Hee Young
최희영
JUNG, Ju Ai
정주애
Title: MICROCELLULAR FOAMING POLYURETHANE ELASTOMER FOR JOUNCE BUMPERS AND METHOD FOR PREPARING SAME
Abstract:
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.