Writing and projection dual-purpose topcoat and preparation method thereof

A dual-purpose, topcoat technology, applied in the coating and other directions, can solve the problems affecting teachers' writing on the blackboard, the use of projectors, and inconvenience in teaching, and achieve the effect of clear handwriting, clear viewing, and reduced eye damage.

Active Publication Date: 2016-06-22
SHIJIAZHUANG KEDA STATIONERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Now the writing boards in most schools have been replaced by painted steel boards, which are easy to write and erase, and protect students’ eyesight. However, they cannot be used in conjunction with the projectors that are already equipped. The writing board is basically covered, which affects the teacher's writing on the blackboard and brings inconvenience to teaching

Method used

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  • Writing and projection dual-purpose topcoat and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0042] A dual-purpose topcoat for writing and projection, which is composed of the following raw materials in mass percentage: melamine formaldehyde resin 20%, acrylic resin 27%, dispersant 0.5%, coloring pigment 3%, anti-settling agent 10%, wear-resistant filler 10%, curing agent 1.5%, matting agent 4%, water 24%.

[0043] The dispersant is PAA-402 dispersant; the anti-settling agent is FP-88 anti-settling agent; the coloring pigment is white coloring pigment; the wear-resistant filler is a mixture of ceramic powder and graphite powder, wherein the mass ratio of ceramic powder and graphite powder is 1 : 1; curing agent is triisopropanol tertiary amine titanate; matting agent is white carbon black.

[0044] A preparation method for a dual-purpose top coat for writing and projection, specifically comprising the following steps:

[0045] (1) According to the above ratio, first mix and disperse melamine formaldehyde resin, acrylic resin, dispersant, anti-sedimentation agent and ...

Embodiment 2

[0048] A dual-purpose topcoat for writing and projection, which is composed of the following raw materials in mass percentage: melamine formaldehyde resin 22%, acrylic resin 28%, dispersant 0.5%, coloring pigment 2%, anti-settling agent 8%, wear-resistant filler 15%, curing agent 1.5%, matting agent 3%, water 20%.

[0049] Dispersant is PAA-402 dispersant; Anti-settling agent is FP-88 anti-settling agent; Coloring pigment is silver-gray coloring pigment; Wear-resisting filler is the mixture of ceramic powder and graphite powder, wherein the mass ratio of ceramic powder and graphite powder is 1:2; curing agent is triisopropanol tertiary amine titanate; matting agent is white carbon black.

[0050] The preparation method of this writing and projection dual-purpose topcoat is the same as the preparation method of Example 1, the difference lies in the ratio of raw materials; the speed of high-speed mixing and dispersion in step (1) is 900r / min, and the time is 12 minutes; in step ...

Embodiment 3

[0052] A dual-purpose topcoat for writing and projection, which is composed of the following raw materials in mass percentage: melamine formaldehyde resin 21%, acrylic resin 26%, dispersant 1.2%, coloring pigment 1.5%, anti-settling agent 9%, wear-resistant filler 11%, curing agent 1%, matting agent 2.3%, water 27%.

[0053] Dispersant is PAA-402 dispersant; Anti-settling agent is FP-88 anti-settling agent; Coloring pigment is beige coloring pigment; Wear-resisting filler is the mixture of ceramic powder and graphite powder, wherein the mass ratio of ceramic powder and graphite powder is 1:3; the curing agent is triisopropanol tertiary amine titanate; the matting agent is white carbon black.

[0054] The preparation method of this writing and projection dual-purpose topcoat is the same as the preparation method of Example 1, the difference lies in the ratio of raw materials; the speed of high-speed mixing and dispersion in step (1) is 1000r / min, and the time is 10 minutes; in ...

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Abstract

The invention discloses a dual-purpose topcoat for writing and projection and a preparation method thereof, and relates to the technical field of topcoat for teaching writing boards and multimedia projection appliances. It is composed of the following raw materials in mass percentage: melamine formaldehyde resin 20-25%, acrylic resin 25-30%, dispersant 0.5-1.5%, coloring pigment 1.5-3%, anti-sedimentation agent 8-15%, wear-resistant filler 10-18%, curing agent 1-2%, matting agent 2-5%, water 20-30%; it is made by mixing, grinding and filtering. The writing and projection dual-purpose topcoat of the present invention has the characteristics of low gloss, moderate roughness, and easy preparation; the writing board made of this topcoat can directly display the projected image on the writing board, and the projection picture is clear, and each part It can be viewed clearly, and at the same time, it does not affect the teacher's writing on the blackboard; and it has good craftsmanship and no pollution.

Description

technical field [0001] The invention relates to the technical field of teaching writing board surface paint and multimedia projection equipment. Background technique [0002] Now the writing boards in most schools have been replaced by painted steel boards, which are easy to write and erase, and protect students’ eyesight. However, they cannot be used in conjunction with the projectors that are already equipped. The writing board is basically covered, which affects the teacher's writing on the blackboard and brings inconvenience to teaching. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a dual-purpose topcoat for writing and projection and its preparation method, which has the characteristics of low gloss, moderate roughness, and easy preparation; the writing board made of this topcoat can directly display the projected image Displayed on the writing board, the projection screen is clear, and all parts can be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/00C09D161/28C09D7/12
Inventor 何玉良
Owner SHIJIAZHUANG KEDA STATIONERY
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