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Spraying-free PVC composition having special aesthetic effects and preparation method and application thereof

A special effect powder and spray-free technology, which is applied in the field of polymer materials, can solve the problems of uneven distribution of special effect powder, unstable flow rate, flow marks and weld lines, etc., so as to improve the market application range and shear resistance , to reduce the effect of weld lines

Active Publication Date: 2015-05-20
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By dispersing the special effect powder into the matrix resin, the special effect powder is connected to each other to form a continuous special effect film, which covers the base material and presents a special effect texture, although the special effect powder is directly added to the resin base. , can achieve a special glossy effect, but the compatibility between the matrix resin and the special effect powder is poor. Under the strong pressure and strong shear conditions of extrusion or injection molding, it is difficult for the special effect powder and the matrix resin material to achieve the same fluidity, especially It is a product with a complex structure. The special effect powder oriented along the flow direction occurs and the melt flow turns, the flow velocity is unstable, and the melt merges, etc., causing the special effect powder to be unevenly distributed in the melt and easy to form on the surface of the product. Defects such as flow marks and weld lines seriously prevent and limit the market promotion and application of this type of spray-free material

Method used

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  • Spraying-free PVC composition having special aesthetic effects and preparation method and application thereof
  • Spraying-free PVC composition having special aesthetic effects and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0042] Example 1-6 Preparation of polymer-coated special effect powder microspheres:

[0043] According to the formula in Table 1, firstly, add anti-oxidation and corrosion inhibitor to the water-based polymer dispersion at room temperature, stir and disperse for 15 minutes to obtain a dispersion; while stirring, slowly add special effect powder, or water-based Special effect powder slurry, then add curing agent while stirring, and continue to stir for 30-120 minutes, so that the special effect powder is fully dispersed and covered by the dispersion liquid, and finally a composite dispersion liquid of polymer-coated special effect powder is obtained; The composite dispersion liquid is spray-dried to obtain polymer-coated special-effect powder microspheres. The temperature of the air inlet during the spray-drying process is 150-300° C., and the temperature of the air outlet is 50-130° C.

Embodiment 1

[0046] In Example 1: the water-based polymer dispersion is a modified PVC emulsion, and its solid content is 10wt%; the metal powder is a surface-treated flake aluminum powder, and the content of the Al element in the aluminum powder is 60wt%, containing Zn and Sn; its particle size is 100 μm; the anti-oxidant corrosion inhibitor is pyrogallic acid; the curing agent is polycarbodiimide.

Embodiment 2

[0047] In Example 2: the water-based polymer dispersion is a polyurethane-acrylate emulsion, and its solid content is 60wt%; the metal powder is a surface-treated flake copper powder, and the content of Cu element in the copper powder is 70wt%, containing Zn and Sn; its particle size is 5 μm; the anti-oxidant corrosion inhibitor is benzotriazole; the curing agent is polyisocyanate.

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Abstract

The invention discloses a spraying-free PVC composition having special aesthetic effects and a preparation method and an application thereof. The spraying-free PVC composition comprises the following components: 70-98 wt% of PVC resin, 1-25 wt% of microspheres formed by coating a special-effect powder with a polymer, 0-10 wt% of a compatibilizer, 0.1-1 wt% of an antioxidant, and 0.1-0.5 wt% of a processing auxiliary agent. The special-effect powder is coated with a water-based polymer dispersion liquid to form the microspheres, and then the microspheres are dispersed to the PVC resin, so that the compatibility of the special-effect powder and the PVC resin can be significantly improved, flow marks formed on the surface of products in an extrusion or injection molding process are eliminated, and weld lines are reduced; and the prepared spraying-free PVC composition has relatively obvious metal texture, pearly flashing effects and other special aesthetic effects, and the market application range of spraying-free materials is greatly improved.

Description

[0001] The invention belongs to the field of polymer materials, and in particular relates to a spray-free PVC composition with special aesthetic effects, a preparation method and application thereof. Background technique [0002] As people pay more and more attention to environmental issues, spray-free special effect material products are gradually showing their competitiveness. Spray-free aesthetic resins can replicate the bright and colorful hues produced by spray paint, as well as pearlescent, flashing effects, metallic luster and Texture and other special effects, so as to meet diversified and differentiated customer needs, and can truly achieve energy saving and emission reduction in the production process, and can be widely used in handicrafts, toys, home appliances, automobiles, electronic products, sporting goods and office supplies and other fields . [0003] At present, the more common preparation method of spray-free resin is to add metal powder, pearl powder and ot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K9/10C08K3/08C08K3/36
CPCC08K3/08C08K7/00C08K9/02C08K9/10C08K2003/0806C08K2003/0893C08L27/06
Inventor 胡纲陈平绪叶南飚王大中宁方林孙雅杰高权星
Owner KINGFA SCI & TECH CO LTD
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