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Aromatic polyols made from alkylene glycols and waste streams from the manufacture of dimethyl terephthalate containing methyl p- formylbenzoate
Aromatic polyols made from alkylene glycols and waste streams from the manufacture of dimethyl terephthalate containing methyl p- formylbenzoate
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机译:由亚烷基二醇制得的芳族多元醇和含有对甲酰基苯甲酸甲酯的对苯二甲酸二甲酯生产中产生的废物流
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摘要
Mixtures of aromatic polyols containing ester functionalities suitable for use in rigid foams prepared by reacting a dimethyl terephthalate waste stream containing methyl p-formylbenzoate over a metal alkoxide catalyst and subsequently transesterifying the product with a polyalkylene glycol in the presence of heat are described. These novel polyols may be blended with conventional polyols to yield excellent rigid foams, thus serving as useful polyol extenders. These low hydroxyl number extender polyols unexpectedly have a low relative viscosity.
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