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

A kind of low-viscosity thermosetting particleboard starch adhesive and preparation method thereof

A starch adhesive, particle board technology, applied in the directions of adhesives, adhesive types, graft polymer adhesives, etc., can solve problems such as viscosity increase, achieve a low degree of self-crosslinking, widen application fields, and fluidity. Good results

Active Publication Date: 2022-08-02
JIANGNAN UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above-mentioned technical problems, the present invention provides a low-viscosity and good water-resistant thermosetting particleboard starch adhesive and a preparation method thereof. However, the cross-linking monomer that can quickly cross-link during the hot pressing process of the sheet can avoid the problem of viscosity increase during the adhesive reaction process, and the cross-linking monomer undergoes a self-crosslinking reaction during the hot pressing process to form a three-dimensional The network structure improves the water resistance of the adhesive, and the addition of itaconic acid can promote the self-crosslinking reaction of the cross-linking monomer during the hot pressing process, further improving the water resistance of the adhesive

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
  • A kind of low-viscosity thermosetting particleboard starch adhesive and preparation method thereof
  • A kind of low-viscosity thermosetting particleboard starch adhesive and preparation method thereof
  • A kind of low-viscosity thermosetting particleboard starch adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Formula (mass / g):

[0048]

[0049] Process flow:

[0050] (1) starch and water are made into starch milk with a concentration of 35% in mass ratio on a dry basis of starch, and stir evenly;

[0051] (2) Adjust the temperature of starch milk to 60°C at a rate of 2°C / min, dilute 10g of 12mol / L concentrated hydrochloric acid solution to 0.6mol / L, add to starch milk for acidolysis, acidolysis for 2h, and then add 10mol / L L sodium hydroxide solution to adjust the pH to 4; adjust the temperature of the acid-hydrolyzed starch milk to 85°C at a rate of 1°C / min, and keep the reaction temperature unchanged at 85°C after pre-gelatinization for 30 minutes;

[0052] (3) Dissolve 0.61g initiator in 35g water to make an initiator solution, dissolve 1.3g emulsifier in 24.8g water to make a 5% emulsifier solution, take 5g graft monomer itaconic acid and dissolve it in 45g water To prepare a solution, take 15g of cross-linking monomer N-hydroxyethyl acrylamide and dissolve it in th...

Embodiment 2

[0059] Formula (mass / g):

[0060]

[0061] Process flow:

[0062] (1) starch and water are made into starch milk with a concentration of 35% in mass ratio on a dry basis of starch, and stir evenly;

[0063] (2) adjust the temperature of starch milk to 60°C at a rate of 2°C / min, keep the temperature for 2h, then add 10mol / L concentrated hydrochloric acid solution to adjust pH to 4; adjust the temperature of starch milk to 85°C at a rate of 1°C / min , after pregelatinization for 30min, the reaction temperature remained unchanged at 85℃;

[0064] (3) Dissolve 0.61g of initiator in 35g of water to prepare an initiator solution, dissolve 1.3g of emulsifier in 24.8g of water to prepare a 5% emulsifier solution, and dissolve 5g of graft monomer itaconic acid in 45g of water to prepare into a solution, take 15g of cross-linking monomer N-hydroxyethyl acrylamide and dissolve it in the graft monomer solution;

[0065] (4) The initiator and emulsifier solution prepared in step (3) a...

Embodiment 3

[0072] Formula (mass / g):

[0073]

[0074] Process flow:

[0075] (1) starch and water are made into starch milk with a concentration of 35% in mass ratio on a dry basis of starch, and stir evenly;

[0076] (2) Adjust the temperature of starch milk to 60°C at a rate of 2°C / min, dilute 10g of 12mol / L concentrated hydrochloric acid solution to 0.6mol / L, add to starch milk for acidolysis, acidolysis for 2h, and then add 10mol / L L sodium hydroxide solution to adjust the pH to 4; adjust the temperature of the acid-hydrolyzed starch milk to 85°C at a rate of 1°C / min, and keep the reaction temperature unchanged at 85°C after pre-gelatinization for 30 minutes;

[0077] (3) Dissolve 0.61g initiator in 35g water to make an initiator solution, dissolve 1.3g emulsifier in 24.8g water to make a 5% emulsifier solution, take 5g graft monomer itaconic acid and dissolve it in 45g water To prepare a solution, take 15g of cross-linking monomer N-methylol acrylamide and dissolve it in the gr...

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 low-viscosity thermosetting particleboard starch adhesive and a preparation method thereof, belonging to the technical field of adhesive preparation. The present invention selects a cross-linking monomer with low cross-linking degree in the preparation process of the adhesive, but can be quickly cross-linked in the hot pressing process of the plate, namely N-hydroxyethyl acrylamide or methacrylic acid acetoxy ethyl ester to avoid the problem of viscosity increase during the reaction of the adhesive, and the crosslinking monomer undergoes a self-crosslinking reaction during the hot pressing process to form a three-dimensional network structure, which improves the water resistance of the adhesive. The added itaconic acid can promote the self-crosslinking reaction of the crosslinking monomer during the hot pressing process, and further improve the water resistance of the adhesive. The properties of the manufactured particleboard meet the standard of P2 type particleboard, and the properties of the manufactured plywood exceed the standard of class II plywood, which can be suitable for mass production and widely used in hot-pressed wood decoration, particleboard, plywood and fiberboard bonding. Knot.

Description

technical field [0001] The invention relates to a low-viscosity thermosetting particleboard starch adhesive and a preparation method thereof, belonging to the technical field of adhesive preparation. Background technique [0002] my country's forest resources are scarce, and there is a big contradiction between the supply and demand of wood. The current situation of insufficient supply of raw materials in the wood industry has always restricted the development of my country's wood-based panel industry. The effective way to solve this contradiction is to vigorously develop wood-based panels represented by particleboard. Comprehensive utilization of wood. At present, most of the wood-based panels on the market are produced by a hot pressing process, using the adhesive "trialdehyde glue" with thermosetting properties - urea-formaldehyde resin (UF), phenolic resin (PF) and melamine-formaldehyde resin (MF). Adhesive raw materials are not renewable, and a large amount of formaldeh...

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): C09J151/02C08F251/00C08F222/02C08F220/58
CPCC09J151/02C08F251/00C08F222/02C08F220/58C09J103/02C09J2203/346C09J2301/50C09J11/04C09J11/06B32B7/12B32B37/12
Inventor 程力金俊男顾正彪李兆丰洪雁李才明班宵逢
Owner JIANGNAN UNIV
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