An embodiment of the present invention relates to a microcellular foamed polyurethane elastomer for a jounce bumper and a manufacturing method thereof. According to an embodiment of the present invention, the microcellular foamed polyurethane elastomer for a jounce bumper can be usefully used for the jounce bumper since the microcellular foamed polyurethane elastomer has durability which can withstand repeated compressions during driving of a vehicle, particularly has a low height change rate even after the repeated compression process, and excellent physical properties such as tensile strength, elongation, compression set and the like due to a fine cell structure obtained by foaming the prepolymer and a main agent. Further, according to an embodiment of the present invention, a manufacturing method of the microcellular foamed polyurethane elastomer for a jounce bumper enables the raw materials to be simply handled, can improve storage stability of the prepolymer, and can maintain a height change rate of the elastomer to 10% or less by reacting 4,4′-diphenylmethane diisocyanate and poly(oxytetramethylene)glycol or poly(caprolactone)glycol and α-hydro-ω-hydroxypoly(oxypropylene) or α-hydro-ω-hydroxypoly(oxypropylene-co-oxyethylene) at a predetermined ratio during manufacturing of the prepolymer, thereby improving viscosity of raw materials.

    실시예는 자운스 범퍼용 초미세 발포 폴리우레탄 탄성체 및 이의 제조방법에 관한 것으로, 실시예에 따른 자운스 범퍼용 초미세 발포 폴리우레탄 탄성체는 예비중합체와 주제를 이용하여 발포시켜 얻어진 미세 셀 구조로 인하여 자동차 주행시 반복되는 압축에도 견딜수 있는 내구성, 특히, 반복 압축 후에도 높이 변화율이 적고, 인장강도, 신율, 영구압축줄음율 등의 물성이 우수하므로, 자운스 범퍼용으로 유용하게 사용될 수 있다. 또한, 실시예에 따른 자운스 범퍼용 초미세 발포 폴리우레탄 탄성체의 제조방법에 의하면, 예비중합체 제조 시 4,4'-디페닐메탄 디이소시아네이트와 폴리(옥시테트라메틸렌)글리콜 또는 폴리(카프로락톤)글리콜 및 α-히드로-ω-히드록시폴리(옥시프로필렌) 또는 α-히드로-ω-히드록시폴리(옥시프로필렌-코-옥시에틸렌)과 일정 비율로 반응시킴으로써 점도를 개선하여 원료 취급이 간편하면서도 상기 예비중합체의 저장안정성을 향상시킬 수 있고, 탄성체의 높이 변화율을 10% 이하로 유지할 수 있다.


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    Title :

    MICROCELLULAR FOAMING POLYURETHANE ELASTOMERS FOR JOUNCE BUMPER AND PREPARATION METHOD THEREOF


    Additional title:

    자운스 범퍼용 초미세 발포 폴리우레탄 탄성체 및 이의 제조방법


    Contributors:
    YANG JAE SOO (author) / CHOI HEE YOUNG (author) / JUNG JU AI (author)

    Publication date :

    2018-08-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    C08G MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS , Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind / B60G VEHICLE SUSPENSION ARRANGEMENTS , Radaufhängungen und Federungen für Fahrzeuge / C08J Verarbeitung , WORKING-UP





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