| 摘要 |
1336495 Pesticidal and odorant devices CIBA-GEIGY AG 11 Aug 1971 [12 Aug 1970] 37755/71 Headings A5B and A5E A process for producing a device comprising, in a packaging, a composition for emitting vapours of at least one volatile material comprises (a) placing (A) solid organic polymeric material other than natural cellulose, having a molecular weight greater than 1,000 in substantially unimpregnated condition and 0.05-4 parts by weight, per part by weight of (A), of (B) a liquid comprising or constituted by at least one volatile material having a vapour pressure at 20‹C of at least 0.001 Torr and selected from insecticidal, inseotifugal and airconditioning substances in a container impermeable to liquid (B) and vapours thereof and such that (B) is in contact with at least part of the surface of (A) and (A) is insoluble in (B); (b) sealing the container and (c) storing the assembly thus obtained at between 0‹ and 80‹C such that (B) impregnates (A). |
