CRYSTALLIZING COMPOSITION ON THE BASE OF TRANS-1,4-POLYISOPRENE AND METHOD FOR MANUFACTURING OF THERMAL PLASTIC MATERIAL OF IT Russian patent published in 1997 - IPC

FIELD: manufacturing of medicinal articles. SUBSTANCE: proposed crystallizing composition comprises 100 mass parts of trans-1,4-polyisoprene, 2.0 mass parts of titanium dioxide, 5.0-6.0 mass parts of silica filler. 5.5-6.0 mass parts of talc, 2.5-3.0 mass parts of paraffin, 2.5-3.5 mass parts of stearic acid, 2.0-3.0 mass parts of high pressure polyethylene and 0.5 mass parts of ferrum. Initially trans 1,4-polyisoprene is affected by plasticizing, the process takes place at 130-140 C and is followed by mixing with other components on rolls. One third portion of paraffin is added together with talc, its residue is added after silica filler and before titanium dioxide is added. Then molding together with heating is carried out. Processing with the help of pressure takes place, then sustaining within 2-3 min at 90-100 kg/cm² and cooling in mold are carried out. Relative strength of desired material is 147-192 kg/cm², relative elongation is 380-416 %, hardening time is 6-13 min. EFFECT: improved quality of desired product. 2 cl, 2 tbl