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A kind of environment-friendly waterborne polyurethane pencil paint and its preparation method and application method

A water-based polyurethane, environmentally friendly technology, used in polyurea/polyurethane coatings, coatings, pretreated surfaces, etc., can solve the problems of product export and sales risks, easy access by children, etc., to achieve low cost, simple preparation method, Efficient paint effect

Active Publication Date: 2021-02-05
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual production process, most of the appearance of pencils will use paint ink or film, which is easy for children to touch when using it, which brings great risks to the normal export and sales of products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] A preparation method of environment-friendly water-based polyurethane pencil paint, comprising the following steps:

[0032] (1) The preparation method of the primer: in parts by mass, 60-70 parts of the primer resin, 30-40 parts of the filler and 5-10 parts of water are evenly mixed to obtain the primer;

[0033] (2) Topcoat preparation method: in parts by mass, 70-80 parts of topcoat resin, 10-20 parts of pigment and 1-3 parts of crosslinking agent are uniformly mixed to obtain topcoat;

[0034] (3) The preparation method of the varnish: in parts by mass, 80-90 parts of the topcoat resin and 1-3 parts of the silicone hand feeling agent are mixed to obtain the varnish.

[0035] The application method of the above-mentioned environment-friendly water-based polyurethane pencil paint is to modify the existing equipment, specifically to modify the coating apron of the existing equipment, that is, to use an apron with an inner diameter larger than the diameter of the pencil...

Embodiment 1

[0038] A preparation method of environment-friendly water-based polyurethane pencil paint, comprising the following steps:

[0039](1) Primer preparation method: in parts by mass, 60 parts of primer resin, 30 parts of filler and 5 parts of water are uniformly mixed to obtain primer;

[0040] (2) Topcoat preparation method: in parts by mass, 70 parts of topcoat resin, 20 parts of pigment and 1 part of crosslinking agent are uniformly mixed to obtain topcoat;

[0041] (3) The preparation method of the varnish: in parts by mass, 80 parts of the topcoat resin and 3 parts of the silicone hand feeling agent were mixed to obtain the varnish.

[0042] Among them, the pigment is an organic pigment with a fineness greater than 2000 mesh; the crosslinking agent is polycarbodiimide. The primer resin, top coat resin and clear coat resin are all water-based polyurethanes. The water-based resin is water-based polyurethane with high solid content without any solvent, and the water-based pol...

Embodiment 2

[0045] A preparation method of environment-friendly water-based polyurethane pencil paint, comprising the following steps:

[0046] (1) Primer preparation method: in parts by mass, 65 parts of primer resin, 40 parts of filler and 6 parts of water are uniformly mixed to obtain primer;

[0047] (2) Topcoat preparation method: in parts by mass, 72 parts of topcoat resin, 15 parts of pigment and 2 parts of crosslinking agent are mixed uniformly to obtain topcoat;

[0048] (3) The preparation method of the varnish: in parts by mass, 90 parts of the topcoat resin and 2 parts of the silicone hand feeling agent were mixed to obtain the varnish.

[0049] Wherein, the pigment is an inorganic pigment with a fineness greater than 2000 mesh; the crosslinking agent is polycarbodiimide. The primer resin, top coat resin and clear coat resin are all water-based polyurethanes. The water-based resin is water-based polyurethane with high solid content without any solvent, and the water-based po...

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Abstract

An environment-friendly water-based polyurethane pencil paint and its preparation method and application method. In terms of mass parts, 60-70 parts of primer resin, 30-40 parts of filler and 5-10 parts of water are uniformly mixed to obtain a primer; In terms of parts, mix 70-80 parts of topcoat resin, 10-20 parts of pigment and 1-3 parts of crosslinking agent to obtain a topcoat; in terms of parts by mass, mix 80-90 parts of topcoat resin and silicone Mix 1-3 parts of the hand feeling agent to obtain a varnish. The apron extrusion pumping method is used for coating. The raw materials adopted by the invention are environment-friendly, the preparation process of the environment-friendly water-based polyurethane pencil paint is environment-friendly, the applied production process is clean and environment-friendly, without any pollution, and meets the requirements of the EU toy safety standard EN71.

Description

technical field [0001] The invention relates to the technical field of pencil manufacturing, in particular to an environment-friendly water-based polyurethane pencil paint and a preparation method and application method thereof. Background technique [0002] Pencil varnish is mainly used for the coating of wooden pencils, in order to achieve the effect of beauty and protection of pencils. At present, the preparation of pencil paint is mainly based on nitrocellulose paint. During the preparation, the nitrocellulose mixed solvent is mixed, and the nitrocellulose is dissolved in the solvent to obtain the base material, and then different pigments and additives are added to prepare different paints. Types of pencil paint. The mixed solvents used to prepare pencil paint mainly include esters, ketones and alcohols. When used, they not only pollute the environment, but some also contain harmful substances, which endanger the health of primary school students. [0003] The traditi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D7/65C09D7/41C09D7/61B05D1/28B05D3/04
CPCB05D1/28B05D3/0413C09D175/04C09D7/41C09D7/61C09D7/65C08L79/00
Inventor 马兴元刘帅赵昭丁博
Owner SHAANXI UNIV OF SCI & TECH
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