Ecofriendly polyurethane foams blown with aldehyde compounds and aldehyde adducts of Diels-Alder reactions and a method of manufacturing the same

The present invention provides polyurethane foam having a new concept and a preparation method thereof. In the process of preparing polyurethane foam according to the present invention, instead of reducing the amount of water used, an aldehyde compound is added as an initial raw material to proceed...

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Bibliographische Detailangaben
Hauptverfasser: YANG JUN, LEE, DAI SU, LEE, SI HO
Format: Patent
Sprache:eng ; kor
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Beschreibung
Zusammenfassung:The present invention provides polyurethane foam having a new concept and a preparation method thereof. In the process of preparing polyurethane foam according to the present invention, instead of reducing the amount of water used, an aldehyde compound is added as an initial raw material to proceed with a urethane reaction or the Diels-Alder reaction product of the aldehyde compound is added together with the aldehyde compound or alone to proceed with a urethane reaction, wherein the foam is supplemented with water produced while Schiff-base is formed for use. According to the present invention, the water supplied from the initial raw material and the water newly generated during the reaction are sequentially used as a foaming agent to adjust exothermic reaction during the foaming process and reaction heat can be controlled and the problem of brittleness can be solved in the polyurethane foam preparing process without using low-boiling point auxiliary foaming agents. In addition, chemical recycling of waste polyurethane foam can be performed at low temperatures, so it can be performed in an eco-friendly manner. 본 발명은 새로운 개념의 폴리우레탄 폼 및 그 제조방법을 제공한다. 본 발명은 폴리우레탄 폼 제조 공정에서 발포제로서 사용되는 물의 사용 량을 줄여주는 대신, 최초 원료 물질에 대해, 알데히드 화합물을 투입하여 우레탄 반응을 진행하거나, 상기 알데히드 화합물과 함께, 또는 단독으로 알데히드 화합물의 딜스-알더 반응생성물을 투입하여 우레탄 반응을 진행하고, 그 과정에서 시프-염기(Schiff-base)를 형성하면서 생성되는 물을 보충하여 사용한다. 본 발명은 최초 원료 물질에서 공급된 물과 반응과정에서 새롭게 생성된 물을 순차적으로 발포제로 사용하게 됨으로써, 발포 과정에서의 발열 반응을 조절할 수 있고, 저비점 보조 발포제를 사용하지 않고 폴리우레탄 폼 제조 공정에서 반응열을 제어하고 부스러지기 쉬운 성질을 해결할 수 있으며, 폐 폴리우레탄 폼의 화학적 재활용을 저온에서 수행할 수 있으므로, 환경 친화적인 방식으로 수행할 수 있는 장점도 있다.