| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention pertains to mixtures of high-molecular compounds for obtaining carbamide foam plastics. The following percentage mass ratios are proposed for the components of the mixture: 1.00 - amino-formaldehyde resin, 0.01-0.02 - surface-active substance, 0.06-0.10 - mono-substituted phosphate salt of 6-amino caproic acid (acid catalyst and, a modifier at the same time), and 0.8-1.2 - water. The mixture uses an amino-formaldehyde resin containing 0.1-14 % free formal dehyde and an acidic substance is the preferred surface active material. The invention allows to increase strength at pressure of up to 0.09-0.25 MPa. The obtained foam plastic has an aggregative stability of on not more than 4%. Emission of formaldehyde in the foam plastic lowers to 0.08-0.4 mg/ m3%. The invention can be used in the production of thermal and sound-proof materials for wall sandwich panels of prefabricated buildings, noise barrier panels enclosed along automobile roads and railway lines, as well as refrigeration technology. ^ EFFECT: design of a simple mixture for foam plastic with high aggregate stability of the crude foam mixture during its solidification. ^ 3 cl, 2 tbl, 11 ex |
