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Paint for vacuum film coating and its preparation method

A vacuum coating and coating technology, which is applied in vacuum evaporation coating, coating, sputtering coating, etc., can solve the problems of decreased temperature resistance, slow cross-linking rate, and low cross-linking density of film-forming materials, and achieves improved Cross-link density, high cross-link density, and excellent adhesion

Inactive Publication Date: 2008-03-12
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the product still contains a considerable amount of vegetable oil or fatty acid, and the crosslinking rate of soybean oil, linseed oil and other vegetable oil or fatty acid is relatively slow, so the crosslinking density of the film-forming material is low, and the temperature resistance is greatly reduced. Because it contains many molecules with small molecular weight, when the temperature is high, the small molecules will flow or volatilize, which will make the surface state of the coating deteriorate and the gloss of the coating will decrease

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: the component of vacuum coating coating and parts by weight thereof (in gram) are as follows:

[0018] The first part contains hydroxyl polybutadiene HTPB(II) 100.00 (containing 0.0988molOH group)

[0019] Toluene diisocyanate 17.19 (containing 0.1976mol NCO group)

[0020] Phenol 9.58 (containing 0.1019mol active hydrogen atoms)

[0021] Toluene 220.00

[0022] The second part contains hydroxyl polybutadiene HTPB (II) 100.00 (containing 0.0988molOH group)

[0023]According to the above ratio, mix the first part of hydroxyl-containing polybutadiene, HTPB(II), toluene diisocyanate and toluene in a reaction flask equipped with stirring, thermometer, and condensing reflux tube, heat to 80°C, and keep warm for 4 hours Carry out the reaction to form a compound with NCO groups attached to the molecular chain, then add phenol and heat to 90°C for 4 hours, and finally add the second part of hydroxyl-containing polybutadiene, namely HTPB(II), and mix well.

[0...

Embodiment 2

[0026] Embodiment 2: the component of this example vacuum coating coating and parts by weight (unit is gram) are as follows:

[0027] The first part contains hydroxyl polybutadiene HTPB(II) 100.00 (containing 0.0988molOH group)

[0028] Toluene diisocyanate 15.56 (containing 0.1786mol NCO group)

[0029] Phenol 7.76 (containing 0.0826mol active hydrogen atoms)

[0030] Toluene 200.00

[0031] The second part contains hydroxyl polybutadiene HTPB (II) 81.02 (containing 0.0801molOH group)

Embodiment 3

[0032] Embodiment 3: the component of this example vacuum coating coating and parts by weight (unit is gram) are as follows:

[0033] The first part contains hydroxyl polybutadiene HTPB (I) 100.00 (containing 0.1724molOH group)

[0034] Toluene diisocyanate 29.98 (containing 0.3446mol NCO group)

[0035] Phenol 16.70 (containing 0.1777mol active hydrogen atoms)

[0036] Toluene 240.00

[0037] The second part contains hydroxyl polybutadiene HTPB (I) 100.00 (containing 0.1724molOH group)

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PUM

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Abstract

The invention relates to a coating for vacuum deposition. It is made up of hydroxyl containing polybutadiene, polyisocyanate, sealer, and solvent. The hydroxyl containing polybutadiene is divided into two parts. The first part hydroxyl containing polybutadiene, NCO radical ralative OH radical, excess polyisocyanate are reacted to produce compound whose molecule chain is connected to NCO radical. Sealer is added to seal NCO radical. Finally the second part hydroxyl containing polybutadiene is added. The sealer can fully volatilize in roasting solidifying film process. The coating has good luster, hardness, adhesive force, and temperature resistance.

Description

technical field [0001] The invention relates to a paint for vacuum coating and a preparation method thereof, which can be used for coating the bottom surface of products such as glass fiber plastics and metals before vacuum coating, and is especially suitable for being used as a vacuum coating primer for headlights of automobiles and motorcycles. Background technique [0002] Most of the existing vacuum coating coatings use urethane oil or alkyd resin. They use soybean oil, linseed oil, pentaerythritol, trimethylolpropane, phthalic anhydride, toluene diisocyanate, etc. as the main raw materials. After alcoholysis, esterification, Urethane synthesis, adding drier, and oxidative polymerization to form a film. Once the temperature of this paint film exceeds 140°C after vacuum coating, it is easy to produce colorful, glossy or even peeling off of the paint film. After the headlights of automobiles and motorcycles are turned on, the temperature near them is often above 140°C. In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/12
Inventor 周铭张东阳张玉兴陈斌
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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