HIGH FUNCTIONAL COMPLEX POLYESTER POLYOLS

摘要

1. Highly functional, moderate-viscosity, aromatic polyester polyol substantially free of polyether polyol, suitable for use as the sole polyol in the production of polyurethane foams, which are classified as class one in the tunnel test for fire resistance E-84, wherein said aromatic polyester polyol characterized by functionality in the range from 2.8 to 3.2 and moderate viscosity in the range of 4000-10000 cps at 25 ° C, inclusive, where liol is obtained by transesterification or esterification of a mixture containing: 34-66% (w / w) glycols, 24-34% (w / w) source of terephthalate, 0-17% (w / w) glycerol, 0-14% (w / w) pentaerythritol, 0-5% (w / w) methyl glucoside, 0-10% (w / w) sorbitol, 0-15% (w / w) .) natural vegetable oil, modified natural vegetable oil or fatty acid derivatives of vegetable oil. 2. The aromatic polyester polyol of Claim 1, wherein the glycol is ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, tetrapropylene glycol or polypropylene glycol. 3. The aromatic polyester polyol according to claim 1, wherein the terephthalate source is polyethylene terephthalate (PET), industrial recycled PET, PET after use of the product, terephthalic acid (TA), industrial recycled TA (BACA), phthalic anhydride, isophthalic acid or metaphthalic acid .four. Aromatic complex polyester polyol according to claim 1, where the natural vegetable oil is castor