NOF CORPORATION Japanese
HOME Corporate Information News NOF Businesses Environmental Report Investor Information
NOF Businesses
Oleo & Speciality Chemicals
Functional Chemicals & Polymers
Explosives & Propulsion
Functional Foods
Life Science Products
DDS Development
Functional Films
Electronic Materials
News
Product Information
LCD Materials
Soldering Materials
High-Frequency Products
Business Locations
Contact Us
Anti-Corrosion
Others

Research & Development

Adobe Reader

 HOME > NOF Businesses > Electronic Materials > Product Information > Blocked Acid Hardening Technique
Electronic Materials

Product Information


Examples of liquid crystal display and solder mounting applications

Blocked Acid Hardening Technique


What is the blocked carboxylic acid technique?
By using a vinyl ether to block (protect) an organic compound containing carboxylic acid, which is normally a solid powder:
·   The solid can be turned into a liquid, which makes it easier to blend and improves its solubility
·   Heating removes the protective base (vinyl ether), thus restraining the activity of carboxylic acid (so that it can be used when needed)

What is the blocked carboxylic acid technique?


A hardening technique for epoxy resin that uses blocked carboxylic acid


(1) What is epoxy resin?
More than 100,000 tons of epoxy resin is used annually worldwide in coatings, electrical and electronic devices, civil engineering, adhesives, and many other applications. A compound using carboxylic acid is employed as the hardening agent. The main drawback is the difficulty of handling this agent because it is a solid powder. Furthermore, mixing carboxylic acid and epoxy resin causes a chemical reaction that prevents the long-term stability of work processes.

What is epoxy resin?


(2) Why use blocked carboxylic acid?
When blocked carboxylic acid is used as a hardening agent, the epoxy resin remains a liquid at room temperature. This is because the chemical reaction with the epoxy group does not start after blending as the carboxylic acid is protected. Only when the mixture is heated to the point where the blocked vinyl ether is released (well over 100oC), does the chemical reaction between the carboxylic acid and epoxy group begin and hardening take place.

Why use blocked carboxylic acid?

LCD Materials
Soldering Materials

Page Top


Copyright(c) NOF CORPORATION.
All rights reserved.
Sitemap Contact Details Privacy Policy Website Use Terms and Conditions