Biodegradable modified urea resin adhesive and application thereof

A urea-formaldehyde resin glue, biodegradable technology, applied in the direction of adhesives, aldehyde/ketone condensation polymer adhesives, adhesive types, etc., can solve the problem of reducing formaldehyde emission

Active Publication Date: 2015-07-01
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
View PDF5 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The patent document with the publication number CN104130732A discloses a modified urea-formaldehyde resin powder prepared by blending cottonseed protein and urea-formaldehyde resin to solve the problem of long-term release of formaldehyde in the existing urea-formaldehyde resin adhesive during use; the publication number is CN102585130A The patent literature discloses the production of urea-formaldehyde resin with one or more mixtures of glycine, alanine, leucine, isoleucine, valine, phenylalanine, and glutamic acid as a formaldehyde scavenger; Publication No. The patent literature of CN102277114A discloses a preparation method of bacterial protein urea-formaldehyde adhesive. In the production process of urea-formaldehyde adhesive, amino acid bacterial protein is added as a free formaldehyde replenisher to greatly reduce and remove free formaldehyde in the product. , improve product water resistance and stability; Publication No. CN104130732A patent document blends the synthesized urea-formaldehyde resin with cottonseed protein, and publication No. CN102585130A and CN102277114A patent document is to add amino acid or protein in the synthesis process, using Protein or amino acid modified urea-formaldehyde resin; the purpose of the protein-modified resin disclosed in these documents is to reduce the amount of formaldehyde released, so as to be suitable for wood processing industries such as wood-based panels
At present, there is no report on the development of special adhesives for straw-based seedling containers that can be used for biodegradation by protein modification.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Biodegradable modified urea resin adhesive and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Preparation of degradable modified urea-formaldehyde resin

[0026] (a) Add 702g of water into the reaction kettle, add 0.4g of KOH, heat to 70°C, add 105g of soybean protein isolate while stirring at a speed of 400rpm, then raise the temperature to 80°C, keep it warm for 1 hour, and obtain protein hydrolyzate, Then cool to 25°C;

[0027] (b) Add 117g of urea to the reaction kettle, stir and mix evenly, add formaldehyde solution, adjust the pH to 8.0 with KOH solution with a mass fraction of 20% at 25-30°C, then raise the temperature to 60°C, and add 87g of urea again , heat up to 90°C, and keep warm for 0.5h; slowly adjust the pH of the reaction solution to 4.5 with a mass fraction of 20% phosphoric acid solution, and continue to keep warm at 90°C until the reaction solution is dripped into 25-28°C water, and after white clouds are seen, The reaction is ended; adjust the pH of the reaction solution to 7.8 with KOH solution, then lower the temperature of the...

Embodiment 2

[0033] (a) Add 480g of water into the reaction kettle, add 1.1g of potassium hydroxide, and start heating. When heated to 70°C, add 72g of soybean protein isolate while heating rapidly to 80°C, and keep it warm for 1 hour to obtain protein hydrolyzate.

[0034] Step b, step c are identical with embodiment 1.

[0035] (d) Mix the block copolymer obtained in step b and the protein hydrolyzate obtained in step c uniformly at a mass ratio of 1:0.1 to obtain a biodegradable modified urea-formaldehyde resin adhesive

Embodiment 3

[0037] (a) Add 326g of water into the reaction kettle, add 1.3g of potassium hydroxide, and start heating. After heating to 70°C, add 48g of soybean protein isolate while stirring rapidly, keep heating to 80°C, and keep warm for 1 hour.

[0038] Step b, step c are identical with embodiment 1.

[0039](d) Mix the block copolymer obtained in step b and the protein hydrolyzate obtained in step c uniformly at a mass ratio of 1:0.3 to obtain a biodegradable modified urea-formaldehyde resin adhesive.

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 invention provides a biodegradable modified urea resin adhesive and application thereof. The biodegradable modified urea resin adhesive is prepared by mixing a segmented copolymer with protein hydrolysate at a mass ratio of 1:(0.1-0.5), and can be used as an adhesive for preparing a biodegradable product. A degradable modified urea resin is prepared by using a copolymerizing and blending combined method; the degradation period of the adhesive is adjusted and controlled by controlling the addition amount and hydrolysis of the protein hydrolysate in the blending process; furthermore, a seedling culturing container prepared from the adhesive is capable of providing nutritive elements, such as nitrogen, phosphorus and potassium, in the seedling growing process, so that growth of seedlings is promoted.

Description

technical field [0001] The invention relates to the field of chemical materials, in particular to a biodegradable modified urea-formaldehyde resin adhesive and an application thereof. Background technique [0002] Urea-formaldehyde resin is a high-molecular resin polymer formed by addition reaction and polycondensation reaction of urea and formaldehyde. It is the most widely used adhesive in the wood processing industry. It has excellent bonding properties, good construction performance, and low cost. However, the cured urea-formaldehyde resin has short linkages between the formed transverse crosslinks and a high crosslink density, which limits the movement of the polymer chains and makes it difficult for the decomposing biological enzymes to enter the polymer itself. Therefore, it is difficult to carry out biodegradation, which endangers environmental safety. [0003] my country is a large agricultural country, and various types of crop straw resources are very ri...

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
IPC IPC(8): C09J161/32C08G12/40
Inventor 曲萍黄红英常志州武国峰孙恩惠
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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