Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Urea-formaldehyde resin additive and its preparation method and application

A technology of urea-formaldehyde resin and additives, applied in the direction of adhesive additives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problems of short pot life, low stability, poor pre-pressing performance, etc. To achieve the effects of extended pot life, good stability and shortened preloading time

Inactive Publication Date: 2012-02-01
EVERFIRST WISEFUND TECH BEIJING
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of poor preloading performance, low stability and short pot life of the existing urea-formaldehyde resin adhesives, the present invention provides a method that can effectively improve the pre-press performance and stability of the urea-formaldehyde resin adhesive and prolong its pot life. Urea-formaldehyde resin additives

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 1

[0026] Urea-formaldehyde resin auxiliary agent of the present invention is produced according to the following steps:

[0027] 1. Prepare materials according to the following weight ratio:

[0028] Ammonium nitrate: 10kg

[0029] Sucrose: 30kg

[0030] Polyvinyl alcohol: 5kg

[0031] Herotropine: 5kg

[0032] Calcium chloride: 50kg;

[0033] Water: 450kg;

[0034] 2. Add 450kg of water into the reaction kettle and raise the temperature to 45-50°C; then add polyvinyl alcohol, and after it dissolves, add ammonium nitrate, sucrose, urotropine and calcium chloride in sequence, and cool down after all of them dissolve Instantly.

[0035] After testing, the main technical indicators of the obtained product are as follows: solid content: 18%, pH: 6.5-7.5; appearance: colorless transparent liquid.

Embodiment 2

[0037] Urea-formaldehyde resin auxiliary agent of the present invention is produced according to the following steps:

[0038] 1. Prepare materials according to the following weight ratio:

[0039] Ammonium chloride: 15kg

[0040] Hexyl alcohol: 30kg

[0041] Sodium carboxymethyl cellulose: 5kg

[0042] Urea: 10kg

[0043] Sodium chloride: 40kg

[0044] Water: 400kg

[0045] 2. Add 400kg of water into the reaction kettle and raise the temperature to 45-50°C; then add sodium carboxymethyl cellulose, and after it dissolves, add ammonium chloride, hexanehexanol, urea and sodium chloride in turn, and wait for all of them to dissolve After cooling down the temperature can be obtained.

[0046] After testing, the main technical indicators of the obtained product are as follows: solid content: 20%, pH: 6.5-7.5; appearance: colorless transparent liquid.

Embodiment 3

[0048] Urea-formaldehyde resin auxiliary agent of the present invention is produced according to the following steps:

[0049] 1. Prepare materials according to the following weight ratio:

[0050] Diammonium phosphate: 5kg

[0051] Stearic acid: 30kg

[0052] Skim protein: 10kg

[0053] Sodium dihydrogen phosphate: 5kg

[0054] Tapioca starch: 50kg

[0055] Water: 500kg;

[0056]2. Add 500kg of water into the reaction kettle and raise the temperature to 45-50°C; then add defatted protein and tapioca starch, and after they are dissolved, add diammonium phosphate, stearic acid, and sodium dihydrogen phosphate in sequence, and cool down after all of them are dissolved Cool down and serve.

[0057] After testing, the main technical indicators of the obtained product are as follows: solid content: 16%, pH: 6.5-7.5; appearance: colorless transparent liquid.

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 discloses a urea-formaldehyde resin additive, a preparation method and application thereof. The urea-formaldehyde resin additive comprises the following components: ammonium salt, polyhydroxy compound, pH buffer and filler. The urea-formaldehyde resin auxiliary agent of the present invention contains ammonium salt compounds, which react with formaldehyde to generate hexamethylenetetramine. This reaction is a reversible reaction, which is beneficial to control the speed of polycondensation reaction, so that the polycondensation reaction can be carried out uniformly to obtain urea-formaldehyde with uniform molecular weight distribution. The resin is also conducive to improving the stability of the urea-formaldehyde resin; the pH buffer contained in it increases the buffer capacity of the urea-formaldehyde resin, which is beneficial to prolonging the service life of the urea-formaldehyde resin. Adding the urea-formaldehyde resin additive of the present invention during the glue-making process can significantly improve the pre-pressing performance of the adhesive and shorten the pre-pressing time. The prepared urea-formaldehyde resin adhesive has high stability and greatly prolongs the application period, which can fully meet the requirements of plywood production. requirements, effectively improving production efficiency.

Description

technical field [0001] The invention relates to a wood adhesive additive, in particular to a urea-formaldehyde resin additive. The invention also relates to a wood adhesive containing the additive and their application in preparing wood-based panels, belonging to the field of wood adhesives. Background technique [0002] Over the past 30 years of reform and opening up, my country's wood industry, especially the wood-based panel industry, has achieved extraordinary rapid development. Wood-based panels are the products with the most intensive technology, the widest range of uses and the greatest development potential in the wood industry. With the enhancement of residents' consumption ability, the change of consumption concept and the implementation of my country's natural forest protection project, the demand for wood-based panels in industries such as decoration, furniture, packaging, shipbuilding, and automobiles will increase. In 2006, my country's wood-based panel output...

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 Patents(China)
IPC IPC(8): C08K3/28C08K3/30C08K3/32C08K5/09C08K5/053C08K5/092C08L61/24C09J11/06C09J11/08
Inventor 雷得定刘波
Owner EVERFIRST WISEFUND TECH BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com