| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to versions of polyurethane, characterized by low banding or absence of visible banding, as well as to product and laminate, containing such polyurethane. Polyurethane contains product of reaction of the following components: (a) urethane prepolymer with isocyanate functionality, (b) from 0.3 to 0.7 trimethylolpropane equivalent, (c) to 0.4 butanediol or pentanediol equivalent. Component (a) represents product of reaction of, at least, one polyisocyanate in amount 1 equivalent and pentanediol in amount from 0.35 to 0.4 equivalent. Product of reaction of components in fact does not contain polyester polyol and polyether polyol. Product, which contains said polyurethane is selected from the group, including transparent products, optical products, photochromic products, ballistic resistant products. Laminate, containing at least one layer of claimed polyurethane, also contains, at least, one layer of base, selected from the group, including paper, glass, ceramics, wood, stone, fabric, metal or organic polymer material and their combinations.EFFECT: invention makes it possible to obtain polyurethane with good optical properties, high resistance to shock loads, high impact strength, good resistance to atmospheric impact.13 cl, 40 dwg, 59 tbl, 111 ex |
