METHOD TO PRODUCE NATURAL OIL-BASED POLYURETHANE PREPOLYMER

Application number（歐洲專利標(biāo)準(zhǔn)號(hào)）:  WO2015MY00041

Abstract：The present invention provides a method to produce environmentally friendly polyurethane (PU) (30) via prepolymerization method, using vegetable oil bio-polyol, said bio-polyol selected from the group consisting of palm kernel oil-based polyol (PKO) (22), coconut oil-based polyol (CO-p) and soybean polyol (SB-p) as renewable raw material. Prepolymerization is conducted for PKO-p (22) with 2,4-diphenylmethane diisocyanate (MDl) for diisocyanate component, tetrahydrofuran (THF) as solvent, and diethylene glycol (DEG) as chain extender in varying ratios under nitrogen gas atmosphere at ambient temperature. The PU produced via this invention is clear, having semi-flexible to flexible film, that can be used in coating, adhesive and sealant industry especially as coating onto fiberboard due to its hydrophobic properties. The usage is also applicable for solar cells, as semiconductor substrate to replace glass and other PU (20) industries. The invention also potentially allows for lower production cost and sustainable manufacturing without dependency on petroleum-based material.

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