Special color paste for PVC (Polyvinyl Chloride) and production method thereof

Abstract

The invention discloses special color paste for PVC (Polyvinyl Chloride) and a production method thereof. The special color paste for the PVC is prepared from the following components in parts by weight: 0.5 to 1.5 parts of calcium carbonate, 1.5 to 2.5 parts of a stabilizer, 0.2 to 0.6 part of a coloring agent, 0.8 to 1.5 parts of a dispersant, 0.5 to 1.5 parts of epoxy soybean oil and 1.5 to 2.5parts of diisononyl phthalate. The production method comprises the following steps: putting the calcium carbonate, the stabilizer, the coloring agent and the dispersant into a material mixing barrel;sealing the material mixing barrel and stirring for 1min to 2min; adding the epoxy soybean oil and the diisononyl phthalate and continually stirring until the materials are uniformly stirred at a stirring speed which is slow first and then is rapid, so as to obtain a mixed material; putting the mixed material into a three-roller grinder and grinding, wherein the rotary speed of the three-roller grinder is a rotary speed at which the material is attached on rollers and is not thrown off; packaging and storing the ground color paste. The special color paste disclosed by the invention has the advantages of stable color, uniformity in coloring, convenience for changing colors, no influences on mechanical properties of the material and environment protection.

Description

technical field [0001] The invention relates to the technical field of PVC material production, in particular to a special color paste for PVC and a production method thereof. Background technique [0002] Polyvinyl chloride, English abbreviation PVC (Polyvinyl chloride), is a vinyl chloride monomer (vinyl chloridemonomer, referred to as VCM) in peroxide, azo compound and other initiators; or under the action of light and heat, it can be polymerized according to the mechanism of free radical polymerization reaction. made polymer. Vinyl chloride homopolymers and vinyl chloride copolymers are collectively referred to as vinyl chloride resins. PVC used to be the most widely used general-purpose plastic in the world. It is widely used in building materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foaming materials, sealing materials, fibers, etc. [0003] Existing PVC material c...

AI Technical Summary

Problems solved by technology

[0003] Existing PVC material coloring mainly adopts toner dyeing, not only the pigment dust is large during the operation, polluting the environment, but also the toner flying in the high-mixing process will cause inaccurate color matching for the color matching with high requirements

Moreover, the color change of the product is cumbersome, the color is unstable, and the improper use of the colorant will directly affect the mechanical properties of the material. During the extrusion heating process, the toner crystallization will also be caused by the high temperature, which will affect the appearance of the product and affect the quality of the product.