| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to polymer compositions based on plasticised polyvinyl chloride (PVC) with low flammability, low emission of smoke and hydrogen chloride during combustion, designed for insulating inner and outer casings of wires and cables used in high fire risk conditions. The electrically insulating composition contains the following (pts. wt): suspended polyvinyl chloride 100, ester plasticiser 40-60, calcium-zinc complex stabiliser 5-12, epoxy-diane resin or epoxidated soya oil 1-4, calcium carbonate 5-60, trihydrate of aluminium oxide or magnesium hydroxide 30-100, antimony trioxide 5-10, zinc oxide 1-7, boric acid 0.1-1.5, zinc borate 0.5-8, additive 1,3,5-tris-(2,3-dibromoisopropyl)-isocyanurate (FR-930) 0.5-10, diphenylolpropane 0.1-0.5, polyethylene wax 0.1-0.5. The calcium-zinc complex stabiliser used can be: Baeropan MC 9917 KA, Baeropan MC 8703 KA, Naftosafe GKX 2208, Naftosafe GKX 2292 Akropan 2593 PX, Akropan 2530 PX. ^ EFFECT: higher degree of non-flammability, increased fluidity of the melt and environmental safety of the insulating material. ^ 2 cl, 1 tbl |
