FIELD: chemistry.
SUBSTANCE: intermediate layer of multilayer glazing is made from polyvinyl butyral and contains agents which selectively absorb infrared radiation. The intermediate layer contains lanthanum hexaboride in amount of 0.005-0.1% of the weight of the polyvinyl butyral sheet which effectively absorbs infrared radiation at 100 nm. The intermediate layer also contains an epoxide agent selected from a group consisting of poly(oxypropylene)glycol diepoxides, 2-ethylhexyl glycidal ether, epichlorohydrin and polypropylene glycol in amount of 0.1-10.0% of the weight of the polyvinyl butyral sheet.
EFFECT: intermediate layer has excellent characteristics for selective attenuation of infrared radiation, which do not deteriorate due to the effect of the surrounding medium.
4 cl, 3 dwg, 1 tbl, 6 ex
