PREPARATION METHOD OF NANOCLAY REINFORCED POLYURETHANE INSULATION FOAMS

摘要

A preparation method of nanoclay reinforced polyurethane insulation foams is provided to improve adiabaticity, mechanical strength and storage stability while not using the organic solvent, to simplify a manufacturing process by applying nanoclay peeled by using diol having a carboxy radical to polyurethane insulation foams. A preparation method of nanoclay reinforced polyurethane insulation foams comprise a step for manufacturing a mixture by mixing (i) at least one or two polyols 100.0 parts by weight selected from solbitol polyol, toluene diamine polyol, ethylenediamine polyol and sucrose/glycerine polyol, (ii) diol 0.05~2.0 parts by weight having a carboxy radical selected from a dimethylol propionic acid, dimethylol butanoic acid and their mixture, and (iii) tertiary amine 0.04~2.0 parts by weight; a step for manufacturing a nanoclay-polyol composite which is exfoliated by inserting diol having a carboxy radical in an interlayer, by mixing the mixed solution 100.0 parts by weight, and nanoclay 0.5~15 parts by weight selected from montmorillonite, hectorite, bentonite, vermiculate and volkonskoite; and a step for manufacturing polyurethane foam by mixing and foaming (i) the nanoclay-polyol composite 100.0 parts by weight, (ii) diisocyanate 100~180 parts by weight selected from crude-4,4'- diphenylmethane diisocyanate, 4,4'-diphenylmethane diisocyanate, crude-2,6-toluene diisocyanate, 2,6-toluene diisocyanate and 2,4-toluene diisocyanate, (iii) surfactant 0.5~5 parts by weight as an additive for foaming, (iv) foaming agent 8~50 parts by weight and (v) foaming catalyst 0.2~2 parts by weight.