Method for preparing modified chlorinated polypropylene and paint produced by modified chlorinated polypropylene for plastic-steel doors and windows

Abstract

The invention discloses modification of chlorinated polypropylene and paint prepared by the chlorinated polypropylene for plastic-steel doors and windows. In the modification, the chlorinated polypropylene is modified by adopting composite acrylic monomers by virtue of a heterogeneous graft technology, and a polar group is introduced into the backbone, so that the backbone can be dissolved in an ester solvent. The modified resin has higher hardness and excellent low-temperature usability by regulating the proportion of soft and hard monomers. The finished product paint is prepared by using modified chlorinated polypropylene resin as a main film forming substance, adding dispersant, defoaming agent, flatting agent, ultraviolet absorbent and pigment, preparing materials, dispersing, grinding, stirring and filtering. According to the preparation method and the pain, colorization of plastic-steel doors and windows is realized, the fullness of the paint coating is improved, and color changing is flexible; the paint has excellent adhesive force and weather tolerance, and the service life of doors and windows is prolonged; and the paint is environmentally friendly, has low cost, and can be widely used.

Description

technical field [0001] The invention belongs to the modification of chlorinated polypropylene and the coating for plastic-steel doors and windows prepared therefrom. Background technique [0002] Plastic-steel doors and windows are an emerging industry developed after wood, steel, and aluminum doors and windows. Due to its environmental protection, energy saving and thermal insulation and many other industrial advantages, it has developed extremely rapidly. However, plastic-steel doors and windows are mostly white now, which cannot meet consumers' individual requirements for door and window products, and white plastic-steel doors and windows also have disadvantages, such as monotonous designs and varieties, poor weather resistance, acid and alkali resistance, etc. [0003] The only colored plastic-steel doors and windows in the market are roughly divided into three kinds of coloring processes: one is to add two-color co-extrusion steps to the profile production process to fo...

AI Technical Summary

Problems solved by technology

However, plastic steel doors and windows are mostly white now, which cannot meet consumers' individual requirements for door and window products, and white plastic steel doors and windows also have disadvantages, such as monotonous designs and varieties, poor weather resistance, acid and alkali resistance, etc.

Fluorocarbon coatings are expensive and inconvenient to use, while acrylic coatings have low hardness and are prone to aging and fading, which limits their extensive application in colored plastic-steel doors and windows

Images