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
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  • 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-link...

Method used

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  • 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.

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PUM

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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

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Application Information

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IPC IPC(8): C09J103/14
Inventor 莫元烈
Owner 莫元烈
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