| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to formulation of polymer composition based on non-plasticised polyvinyl chloride (UPVC), which is applied in production of free-flow (sewage) pipes by method of extrusion. Polymer composition for production of pipes contains NPVC with value of Fikentscher constant (K) 66.0-69.0 and bulk weight 0.4-0.6 g/cm, calcium carbonate, complex thermostabiliser: tribasic lead sulphate Pb(SO)- 17%, bibasic lead phosphite 2PbO·PbHPO·0,5HO - 18%, lead stearate Pb(CHO)- 28%, calcium stearate Ca(CHO)- 27%, antioxidant - 10%, impact resistance modifier: chlorinated polyethylene CPE 135, fluidity modifier: acryl processing anti-stick additive, lubricant: polyethylene wax, stearic acid, soot. Polymeric composition can additionally include recycled furniture PVC film or recycled waste PVC panels. Mixing of all components is carried out in three stages: mixing in hot mixer, mixing in cold mixer, exposure of mixture at temperature 15-30°C for 24 hours. Prepared in such way mixture is supplied in extruder.EFFECT: invention makes it possible to obtain polyvinyl chloride product with high impact viscosity, perfect quality of external and internal surfaces and low prime cost.3 cl, 2 tbl |
