Method for preparing compound calcium and zinc stabilizer for plastic pipeline

Abstract

The invention relates to the technical field of stabilizers for plastic pipelines, and discloses a method for preparing a compound calcium and zinc stabilizer for a plastic pipeline. The method comprises the following steps that (1) the raw materials are weighed and taken in parts by weight: 15 to 30 parts of calcium stearate, 15 to 30 parts of zinc stearate, 10 to 15 parts of modified montmorillonite, 3 to 5 parts of a butyl stearate lubricant, 0.5 to 1 part of an antioxidant, and 0.5 to 1 part of an ultraviolet light absorber; (2) the calcium stearate, the zinc stearate, and butyl stearate are added into a homogenizer to be uniformly stirred at 50 to 60 DEG C to obtain a premix; and (3) the modified montmorillonite, the antioxidant, and the ultraviolet light absorber are added into the premix to be uniformly stirred at 45 to 50 DEG C, and the compound calcium and zinc stabilizer is obtained. The prepared compound calcium and zinc stabilizer is environmentally friendly, and the heat resistance performance of a polyvinyl chloride pipeline can be significantly improved.

Description

technical field [0001] The invention relates to the technical field of plastic pipeline stabilizers, in particular to a preparation method for composite calcium-zinc stabilizers for plastic pipelines. Background technique [0002] Plastic pipes are widely used in plastic products. As a general-purpose plastic, polyvinyl chloride (PVC) has the characteristics of flame retardant, wear-resistant, excellent electrical insulation and high mechanical strength. Rigid PVC pipes The output accounts for more than 55% of the entire plastic pipe output. It is widely used in chemical production, Aquaculture, mine ventilation, human and livestock water diversion projects, drainage facilities and cable threading pipes and other fields. However, PVC itself also has defects and deficiencies, such as poor thermal stability, unstable plasticizing effect, and easy volatilization and migration. When preparing hard products, the apparent viscosity of the melt is high, and the processing fluidit...

AI Technical Summary

Problems solved by technology

[0003] Chinese Patent Publication No. CN102329467 discloses a polyvinyl chloride pipe and its preparation method. The polyvinyl chloride pipe includes the following raw materials by weight: polyvinyl chloride resin, heat stabilizer, processing aid, impact modifier, flame retardant Smoke modifiers, lubricants, pigments, and calcium carbonate. In this technical solution, organotin stabilizers are used to enhance the heat resistance of polyvinyl chloride, but organotin stabilizers are expensive and not environmentally friendly

Chinese Patent Publication No. CN103012998 discloses a chlorinated polyvinyl chloride pipe, comprising the following components: chlorinated polyvinyl chloride resin, polyvinyl chloride resin, heat-resistant modifier NR-188, calcium zinc stabilizer, filler, chlorine Chemical polyethylene, paraffin, stearic acid, pigment; Another example is Chinese Patent Publication No. CN110079030 which discloses a kind of environmentally friendly and non-polluting industrial chlorinated polyvinyl chloride pipe and its preparation method and application, prepared from the following raw materials in parts by mass : PVC-C resin, environmentally friendly non-toxic calcium zinc stabilizer, external lubricant, internal lubricant, processing modification additives, impact resistance, fillers, antioxidants, pigments, the PVC pipe stabilizers used above are all It is an environmentally friendly and non-toxic calcium-zinc heat stabilizer, but the improvement of the heat resistance of polyvinyl chloride by calcium-zinc heat stabilizers is limited

Images