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Colorless polyimide explosion-proof layer and preparation method thereof

A technology of polyimide and anti-explosion layer, which is applied in coatings, fireproof coatings, primers, etc. It can solve the problems of changing the molecular structure of CPI, further improvement, and yellowish color, and achieves good tensile properties and strong adhesion. The effect of strong force and strong boiling resistance

Active Publication Date: 2020-11-20
XIAMEN SANDEXIN SCI&TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adhesion of CPI on glass is relatively poor. In order to improve the adhesion of CPI film on glass, some current technical solutions are to add adhesion promoters (mainly silane coupling agents containing aromatic carbon chains) in CPI explosion-proof coatings. etc.), but the addition of adhesion promoter will change the molecular structure of CPI, so that the light transmittance T% of CPI will decrease, and the color will be yellowish
In addition, the adhesion of the existing CPI explosion-proof coating on the glass surface and the ability to withstand boiling water (used to evaluate the performance of high-temperature water vapor resistance) need to be further improved

Method used

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  • Colorless polyimide explosion-proof layer and preparation method thereof
  • Colorless polyimide explosion-proof layer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This embodiment provides a method for preparing a colorless polyimide explosion-proof layer, which includes:

[0048] S1: Preparation of colorless primer layer;

[0049] Add 300 g of KH-560, 600 g of absolute ethanol, and 20 g of water to the container, stir at room temperature for 40 minutes, and add dilute hydrochloric acid dropwise to adjust the pH to 5 to prepare a primer coating.

[0050] Prepare a glass sheet with a size of 5cm*4cm, apply the primer paint on the glass substrate, and bake it in an oven at 80°C for 30 minutes.

[0051] S2: Preparation of CPI coating;

[0052] Add 250g of soluble CPI powder or fiber, 4g of BASF-A10, 5g of HTK-3020, 850g of DMF (dimethylformamide) to the stirred tank, adjust the temperature of the stirred tank to 60℃, rotate the speed at 300rpm, and stir for 4 hours to prepare Get CPI paint.

[0053] Apply the CPI coating to the surface of the glass sheet with the colorless primer by knife coating, and then program the temperature rise, namely:...

Embodiment 2

[0055] Example 2 is based on Example 1, changing the preparation method of CPI coating: adding 200g of soluble CPI powder or fiber, 3g of BASF-A10, 4g of HTK-3020, 800g of DMF (dimethylformamide) to the stirred tank In the process, the temperature of the stirring tank was adjusted to 60°C, the rotation speed was 400 rpm, and the mixture was stirred for 4 hours to prepare the CPI coating.

Embodiment 3

[0057] Example 3 is based on Example 1. The preparation method of the primer coating is changed as follows: 250g KH-560, 550g absolute ethanol, 16g water are added to the container, stirred at room temperature for 40 minutes, and diluted hydrochloric acid is added dropwise to adjust the pH to 5. Prepare primer paint.

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Abstract

The invention relates to a colorless polyimide explosion-proof layer, which comprises a colorless primer layer and a CPI coating, and the colorless primer layer is arranged between the CPI coating anda glass substrate. The colorless primer layer is prepared by coating and curing a primer, which is prepared from the following components in parts by weight: 5 to 50 parts of a silane coupling agent,30 to 80 parts of liquid alcohol and 0.2 to 3 parts of water; the pH value is adjusted to 3 to 6; the CPI coating is prepared by coating and curing a CPI coating; and the CPI coating is prepared fromthe following components in parts by weight: 5 to 30 parts of soluble CPI powder or fiber, 70 to 90 parts of a CPI good solvent, 0.1 to 1 part of an antifoaming agent and 0.1 to 1 part of a levelingagent. The colorless polyimide explosion-proof layer is prepared by arranging the colorless primer layer taking the silane coupling agent as a main functional component, bottoming on the surface of the glass substrate, coating the CPI coating and curing the CPI coating. Firm chemical bond connection is formed between the silane coupling agent in the colorless primer layer and the surface of the glass substrate as well as between the silane coupling agent in the colorless primer layer and the CPI coating, and the finally prepared colorless polyimide explosion-proof layer shows extremely high adhesive force and boiling resistance on the surface of the glass.

Description

Technical field [0001] The invention relates to the technical field of glass explosion-proof, in particular to a colorless polyimide CPI explosion-proof layer and a preparation method thereof. Background technique [0002] Due to the high permeability and high strength of glass, currently on the market handheld electronic devices, touch-sensitive ATM cash machines, touch-sensitive self-service ordering machines, etc., all use glass cover plates as the device's human-machine interface. The glass interface may be ruptured by external forces during use, and small and sharp glass fragments will be splashed out of the rupture, which will cause secondary harm to the human body. This damage is particularly serious on the vehicle. Therefore, it is of great significance to make an explosion-proof layer on the glass interface to prevent glass splashing. [0003] Colorless and transparent polyimide (CPI, Colourless Polyimide) has the advantages of high light transmittance, good durability, g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/08C09D5/00C09D183/04C09D183/08C03C17/34
CPCC09D179/08C09D5/18C09D5/002C09D183/04C09D183/08C03C17/3405C03C2217/78C03C2218/32C03C2218/116C03C2218/114C03C2218/111C03C2218/112Y02E60/10
Inventor 欧阳文庄江强
Owner XIAMEN SANDEXIN SCI&TECH CO LTD