FIELD: chemical industry; methods of production of the thermocross-linked polyvinyl acetals.
SUBSTANCE: the invention is pertaining to: the thermocross-linked polyvinyl acetal produced at least from one polyvinyl acetal (I), which is the result of the interaction of at least one polymer (A) containing in the mass % in terms of the total sum of the polymer (A)- a) 1.0-99.9 of the structural links of the formula (1), - b) 0-98.9999 of the structural links of the formula (2), - c) 0.0001-30,0 of the structural links of the formula (4), with the compound (B) of the formula (5); at that at least partially the groups of the formulas (1) and (4) are etherifying with one another. The invention also is pertaining to: the method of the cross-linking of the polyvinyl acetal (I) at the temperature of the mass within the limits from 120°С up to 280°С, in the case of necessity, together with at least one plasticizer; to the molding mass containing the indicated polyvinyl acetal; to the produced out of the molding mass film for manufacture of multilayered safety glasses and to the coating; and to application of the molding mass for production of the ionic-conducting layers for the electrochromic systems. The presented polyvinyl butyral (PVB) is produced with the high reproducibility and without addition of the separate cross-linking agent. The films containing the given high-molecular cross-linked polyvinyl acetal, have the lowered flow index of their melt, and the coatings have the improved resistance to the dissolvents.
EFFECT: the invention ensures, that the films made out of the high-molecular cross-linked polyvinyl acetal have the lowered flow index of their melt and the coatings made out of the high-molecular cross-linked polyvinyl acetal have the improved resistance to the dissolvents.
15 cl, 16 ex
