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

Cationic branched-chain starch wood adhesive and its preparing method

A technology of wood adhesives and pullulan, applied in the direction of amylose/pullulan derivative adhesives, adhesive types, etc., to achieve the effects of improved stability, good cohesiveness, and good fluidity

Inactive Publication Date: 2006-05-24
莫元烈
View PDF1 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of cationic pullulan wood adhesive prepared by cross-linking reaction, etherification reaction and low-degree oxidation reaction to overcome the shortcomings of existing starch adhesives

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
  • Cationic branched-chain starch wood adhesive and its preparing method
  • Cationic branched-chain starch wood adhesive and its preparing method
  • Cationic branched-chain starch wood adhesive and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] formula:

[0038] 100g tapioca starch 520g water

[0039] 30% NaoH 8 g Diethyldichlorosilane 1 g

[0040] Sodium hypochlorite 0.1 g Na 2 SO 4 10 grams

[0041] Pyridine 2 g

[0042]3-Chloro-2-hydroxypropyltrimethylammonium chloride 0.1mol

[0043] Preparation:

[0044] A. Take tapioca starch and 100 grams of water, add pyridine and Na 2 SO 4 or NaOH and Na 2 SO 4 Mix well, add dialkyldichlorosilane for cross-linking reaction for 1-10 hours, adjust the pH value to neutral, wash with water three times, and dry to obtain cross-linked starch for later use;

[0045] B. Add 120 grams of water, NaOH and Na to the cross-linked starch 2 SO 4 Mix evenly, then add 3-chloro-2-hydroxypropyltrimethylammonium chloride for etherification reaction for 10 hours, adjust the pH value to neutral, wash with water three times, and dry to obtain cross-linked cationic starch for later use;

[0046] C. Add 100 grams of water, NaOH, Na to the cross-linked cationic starch 2 SO ...

Embodiment 2

[0049] formula

[0050] Waxy sorghum starch 100g water 600g

[0051] 30% NaoH 12g Diphenyldichlorosilane 5g

[0052] Sodium hypochlorite 1 g Na 2 SO 4 20 grams

[0053] 3-Chloro-2-hydroxypropyltrimethylammonium chloride 0.3mol pyridine 4 grams

[0054] The preparation method is the same as in Example 1, and the adhesive is obtained after preparation.

Embodiment 3

[0056] formula:

[0057] 100g glutinous rice starch 800g water

[0058] 30% NaoH 10g Epichlorohydrin 3g

[0059] Quaternary ammonium salt 0.3mol Hydrogen peroxide 0.5g

[0060] Na 2 SO 4 15 grams

[0061] The preparation method is the same as in Example 1, and the adhesive is obtained after preparation;

[0062] Another recipe:

[0063] Vinyl ethyl acetate 4 g Citric acid 1 g

[0064] Urea 0.5g Water 120g

[0065] Benzoic acid 0.1g Polyvinyl formal 10g

[0066] PVA 10g ammonium persulfate 0.5g

[0067] Preparation method: Take the above-mentioned raw materials and mix them uniformly with water to obtain the auxiliary agent. Get 40 grams of adhesive and mix evenly with 15 grams of stabilizer to get stable 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 discloses a positive ion branched chain starch wood adhesive and the method to manufacture. It adopts low oxidation to increase the starch aldehyde group after reaction to solve the strong cementing force of the adhesive. It adds cross linking agent etherifying agent, and oxidizing agent to branched chain to make the invention has strong cementing force, good water resistance, fluidity, and stability.

Description

1. Technical field [0001] The invention relates to an adhesive, especially a cationic pullulan wood adhesive; the invention also relates to a preparation method of the adhesive. 2. Background technology [0002] With the scarcity and shortage of wood resources, the application of wood adhesives is becoming more and more extensive. At present, among wood adhesives, formaldehyde series adhesives are most widely used. Formaldehyde series adhesives will release harmful gases such as free formaldehyde during use, seriously polluting the environment, and causing people to worry about environmental protection. There are two types of adhesives: synthetic polymer adhesives and natural polymer adhesives. Formaldehyde series adhesives belong to the category of synthetic polymer adhesives. Synthetic polymer adhesives generally have the advantages of small molecular weight, good wettability, and high bonding strength, and become the mainstream of wood adhesives. . Natural adhesives are...

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): C09J103/14
Inventor 莫元烈
Owner 莫元烈
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