Low-formaldehyde environment-friendly adhesive and preparation method thereof

By combining modified starch, plant protein, and nanocellulose, a robust three-dimensional covalent network is constructed, which solves the problems of insufficient water resistance and bonding strength of biomass-based adhesives and enables the application of high-performance adhesives.

CN121574672BActive Publication Date: 2026-06-09HUBEI YIHUA NEW MATERIALS TECH CO LTD
View PDF 3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
HUBEI YIHUA NEW MATERIALS TECH CO LTD
Filing Date
2026-01-27
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing biomass-based adhesives suffer from poor water resistance, insufficient bonding strength, and complex preparation processes, which limit their large-scale application.

Method used

By combining modified starch, plant protein, modified nanocellulose and composite crosslinking agent, a stable three-dimensional covalent network is constructed through enzymatic hydrolysis, composite acid anhydride modification and nanoscale interface enhancement. The organic-inorganic hybrid structure is formed by the crosslinking reaction of aminosilane and polyaspartic acid.

Benefits of technology

It significantly improves the water resistance and bonding strength of the adhesive, achieves good storage stability and application rheology, enhances the flexibility and impact resistance of the adhesive film, and provides antibacterial and antifungal protection.

โœฆ Generated by Eureka AI based on patent content.

Smart Images

  • Figure SMS_1
    Figure SMS_1
Patent Text Reader

Abstract

This application relates to the field of adhesive technology, specifically disclosing a low-formaldehyde environmentally friendly adhesive and its preparation method. The low-formaldehyde environmentally friendly adhesive is prepared from the following raw materials in parts by weight: 30-50 parts modified starch, 15-25 parts plant protein, 5-10 parts modified nanocellulose, 2-5 parts composite crosslinking agent, and 80-150 parts water; the composite crosslinking agent includes aminosilane and polyaspartic acid; the modified starch is obtained by enzymatic hydrolysis of starch with ฮฑ-amylase followed by graft copolymerization with a composite acid anhydride; the plant protein is alkalized and heat-treated before use; the modified nanocellulose is obtained by sequentially reacting nanocellulose with propylene oxide and ethylene oxide in a ring-opening etherification reaction. The low-formaldehyde environmentally friendly adhesive obtained by this application has good bonding strength and low formaldehyde release.
Need to check novelty before this filing date? Find Prior Art