A kind of e0 grade environment-friendly modified urea-formaldehyde resin for particleboard and preparation method thereof

Abstract

The invention discloses E0-level environment-friendly modified urea formaldehyde resin for a shaving board. In addition, the invention also discloses a preparation method of the E0-level environment-friendly modified urea formaldehyde resin for the shaving board. The preparation method is characterized by adopting high-concentration formaldehyde and urea which are low in molar ratio as raw materials and modifying urea formaldehyde resin by adding polyvinyl alcohol, melamine and a reinforcing agent. Through accurate control of a synthesis technology, a vacuum dewatering technological process is omitted, and the prepared urea formaldehyde resin is low in formaldehyde content, good in pre-pressing property, high in internal binding strength and surface binding strength and low in cost.

Description

technical field

[0001] The invention relates to a urea-formaldehyde resin, in particular to a modified urea-formaldehyde resin and a preparation method thereof. Background technique

[0002] Since the beginning of the 21st century, my country's wood-based panel industry has developed rapidly. There are currently more than 10,000 wood-based panel companies with an output of more than 200 million cubic meters and an output value of more than 800 billion yuan. It is the world's largest wood-based panel production, consumption and import and export trade. In 2015, the total output of my country's wood-based panels reached 287 million cubic meters, ranking first in the world for many years. In 2012, the amount of glue used for wood-based panels alone reached 24.924 million tons, equivalent to 13.122 million tons of solid adhesives. The urea-formaldehyde resin adhesive accounts for more than 90% of the glue used in wood-based panels, and is the largest variety in the adhesive. U...

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