Green alkaline paint remover for eliminating coating from electronic circuit board and its prepn and usage

A technology for electronic circuit boards and paint strippers, used in chemical paint/ink removers, coatings, etc., can solve the problems of substrate corrosion, long paint stripping time, etc., to achieve less consumption of raw materials, high paint stripping efficiency, paint fast effect

Inactive Publication Date: 2007-01-03
UNIV OF SCI & TECH BEIJING
View PDF2 Cites 35 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problems of longer paint removal time and substrate corrosion that were difficult to solve with alkaline paint removers in the past, and the surface of the metal layer is clean and bright after removal

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] First remove the electronic components on the electronic circuit board through appropriate means, and then cut the circuit board into small pieces of about 2cm×2cm. The obtained small pieces are placed in the paint remover prepared by the present invention and soaked at 70-95°C. See Table 1 and Table 2 for the composition and temperature conditions of specific paint remover examples.

[0022]

[0023]

[0024] The experimental results show that: within 15 to 60 minutes, the surface paint film peels off completely, while the metal copper wire is clean and bright without corrosion, which provides great convenience for the next step of metal recovery. At the same time, the brightness of the solder at the socket is the same as before the paint is removed, which shows that the paint remover has basically no corrosion to the solder. During the process of paint removal, no peculiar smell is generated, no volatilization, safe to use, environmentally friendly...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention is green alkaline paint remover for eliminating coating from electronic circuit board and its preparation and usage, and belongs to the field of paint remover technology. The paint remover consists of NaOH in 40-150 g/L, surfactant in 0.5-50 g/L, additive in 0-50 g/L, corrosion retardant 0.1-2.5 g/L, and water for the rest. It is prepared through mixing and heating at 50-80 for dissolving completely. When the paint remover is used, the electronic circuit board is soaked in the paint remover and heated at 50-100 deg.c for 10-60 min to eliminate its paint layer. The present invention has the advantages of low cost, fast paint eliminating speed, low toxicity, use safety and capacity of being used repeatedly.

Description

technical field [0001] The invention belongs to the technical field of paint removers, and provides an environment-friendly alkaline paint remover for removing paint layers of electronic circuit boards and a preparation and use method thereof, which are used for removing surface paint layers of electronic circuit boards. Background technique [0002] The circuit board is a mixture of glass fiber reinforced resin and various metals, which has a high recycling value. Among them, the polymer organic matter is difficult to degrade under natural conditions, and the metals contained in it, such as copper, lead, tin, etc., are precious resources. May cause serious pollution to the environment. If it is not handled properly, it will not only cause a large loss of resources, but also seriously endanger the environment. At present, how to effectively recycle waste circuit boards has become an urgent problem that is related to the sustainable development of my country's economy, socie...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C09D9/04
Inventor 李建强李仁勇王舒婷杨竟罗晗骐何若愚
Owner UNIV OF SCI & TECH BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap