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

A technology of chlorinated polypropylene and chlorinated polypropylene liquid, applied in coating and other directions, can solve the problem of not meeting consumers' personalized requirements for door and window products, restricting the large-scale application of colored plastic steel doors and windows, poor weather resistance, acid and alkali resistance. Good adhesion and other problems, to achieve the effects of excellent adhesion and weather resistance, high hardness and low cost

Inactive Publication Date: 2012-11-14
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0045] Preparation of modified chlorinated polypropylene:

[0046] a) Add 30 parts of chlorinated polypropylene with a chlorine content of 20% to 40% to 76 parts of toluene, heat up to 70-80°C to completely dissolve the material, and obtain a chlorinated polypropylene liquid;

[0047] b) Dissolving 4.0 parts of methyl methacrylate and 5.1 parts of butyl acrylate with 14 parts of toluene to obtain a mixed monomer liquid as a grafting liquid;

[0048] c) accurately weigh the initiator dibenzoyl peroxide BPO of 0.91 parts, wherein 0.23 parts of the initiator BPO weighed, dissolve with 2 parts of toluene, join in the chlorinated polypropylene solution that a process dissolves, and then Add 0.68 parts of initiator BPO to the grafting solution prepared in step b, and then add the grafting solution to the constant pressure dropping funnel for subsequent use;

[0049] d) Introduce nitrogen gas into the chlorinated polypropylene liquid containing the initiator, wait until the temperat...

Embodiment 2

[0052] Preparation of modified chlorinated polypropylene:

[0053] a) Add 29 parts of chlorinated polypropylene with a chlorine content of 20% to 40% to 73 parts of xylene, heat up to 70-80°C to completely dissolve the material, and obtain a chlorinated polypropylene liquid;

[0054] b) Dissolving 4.6 parts of ethyl methacrylate and 4.0 parts of ethyl acrylate with 12 parts of xylene to obtain a mixed monomer liquid as a grafting liquid;

[0055] c) Accurately weigh 0.86 parts of initiator azobisisobutyronitrile, dissolve 0.43 parts of initiator azobisisobutyronitrile with 4 parts of xylene, and add to the dissolved chlorinated polystyrene in step a. In the propylene solution, 0.43 parts of initiator azobisisobutyronitrile are added to the grafting liquid prepared by the b process, and then the grafting liquid is added to the constant pressure dropping funnel for subsequent use;

[0056] d) Introduce nitrogen gas into the chlorinated polypropylene liquid containing the initiato...

Embodiment 3

[0059] Preparation of modified chlorinated polypropylene:

[0060] a) Add 25 parts of chlorinated polypropylene with a chlorine content of 20% to 40% to 62 parts of toluene, heat up to 70-80°C to completely dissolve the material, and obtain a chlorinated polypropylene liquid;

[0061] b) Dissolving 2.5 parts of methyl methacrylate and 5 parts of ethyl acrylate with 12 parts of toluene to obtain a mixed monomer liquid as a grafting liquid;

[0062] c) Accurately 0.75 parts of initiator dibenzoyl peroxide BPO, 0.25 parts of the weighed initiator is dissolved with 2 parts of toluene, added to the dissolved chlorinated polypropylene solution of a process, and then 0.50 parts The initiator is added to the grafting liquid prepared in step b, and then the grafting liquid is added to the constant pressure dropping funnel for subsequent use;

[0063] d) Introduce nitrogen gas into the chlorinated polypropylene liquid containing the initiator, wait until the temperature rises to 110°C,...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02C09D151/06C09D7/12
Inventor 周运友郭世学孙军勇
Owner ANHUI NORMAL UNIV
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