| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to foam polyisocyanurate composition, which can be applied in production of heat-insulating materials and building panels. Foam polycyanurate composition includes polyisocyanate compound, first polyetherpolyol based on ester, including residue of orthophthalic acid, second polyetherpolyol based on ester, including residue of terephthalic acid, at least one polyetherpolyol based on ether, which is characterised by functionality, constituting at least 3, and hydroxyl number, which changes in the range from 200 to 850 mg KOH/g. Composition also includes physical foaming agent and water in quantity from 0.2 to 3 wt % counted per the total quantity of components in reaction mixture, where isocyanate index constitutes from 250 to 500. Also described is product, which contains claimed composition, and method of panel obtaining, which has facing and block from foam polyisocyanurate.EFFECT: stability of geometrical dimensions in all directions, small degree of shrinkage, increase of strength limit of foam material, as well as absence of waved pattern formation on the product surface.7 cl, 2 tbl, 5 ex |
