Cation branched-chain starch wood binder and its production

A wood adhesive, pullulan technology, applied in the direction of amylose / pullulan derivative adhesives, adhesive types, etc.

Inactive Publication Date: 2007-06-20
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-linking reaction, etherification reaction and low-degree oxidation reaction to overcome the shortcomings of existing starch adhesives

Method used

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  • Cation branched-chain starch wood binder and its production
  • Cation branched-chain starch wood binder and its production
  • Cation branched-chain starch wood binder and its production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] formula:

[0036] Tapioca starch 100g water 520g

[0037] 30% NaoH 8g Diethyldichlorosilane 1g

[0038] Sodium hypochlorite 0.2g Na 2 SO 4 10gram

[0039] Pyridine 4 g n-hexane 200 g

[0040] 3-chloro-2-hydroxypropyltrimethylammonium chloride 0.1mol

[0041] Preparation:

[0042] A. Take tapioca starch and 200 grams of n-hexane, add pyridine and mix well, add dialkyldichlorosilane for cross-linking reaction for 4-10 hours, filter the precipitate, filter out the filter cake, wash impurities with water, and adjust the pH to neutral , After drying, the cross-linked starch is obtained for use;

[0043] B. Add 120 grams of water, NaOH and Na to the cross-linked starch 2 SO 4 Mix well, then add 3-chloro-2-hydroxypropyltrimethylammonium chloride for etherification reaction for 10 hours, adjust the pH to neutral, filter out the filter cake, wash impurities with water, and dry to obtain cross-linked cationic starch for later use ;

[0044] C. Add 100 grams of water, NaO...

Embodiment 2

[0047] formula

[0048] Waxy sorghum starch 100g 600g water

[0049] 30% NaoH 12g Diphenyldichlorosilane 5g

[0050] Sodium hypochlorite 1g Na 2 SO 4 20 grams

[0051] N-hexane 200 g pyridine 4 g

[0052] 3-chloro-2-hydroxypropyltrimethylammonium chloride 0.3mol

[0053] The preparation method is the same as in Example 1, and the adhesive is obtained after preparation.

Embodiment 3

[0055] formula:

[0056] 100 g glutinous rice starch 800 g water

[0057] 30% NaoH 10g Epichlorohydrin 3g

[0058] Quaternary ammonium salt 0.3mol oxygen water 0.5g

[0059] Na 2 SO 4 15 grams

[0060] Preparation method: the cross-linking reaction of the above raw materials is carried out in an alkaline medium, and the rest of the preparation method is the same as in Example 1, and the adhesive is obtained after preparation;

[0061] Take another recipe:

[0062] Vinyl ethyl acetate 4g citric acid 1g

[0063] Urea 0.5 g water 120 g

[0064] Benzoic acid 0.1 g Polyvinyl formal 10 g

[0065] PVA 10g Ammonium persulfate 0.5g

[0066] Preparation method: take the above-mentioned raw materials and mix uniformly with water to obtain the auxiliary agent. Take 40 grams of adhesive and 15 grams of stabilizer and mix well to obtain a stable adhesive.

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Abstract

A cationic branched-chain starch wood adhesive and its production are disclosed. The process is carried out by adding cross-linking agent, etherifying agent and oxidant into branched-chain starch, cross-linking reacting, etherification reacting and low-degree oxidation reacting. Its advantages include excellent adhesion, water-resistance, fluidity and anticoagulant performance, long storage period and fast dry speed.

Description

1. Technical Field [0001] The present invention relates to an adhesive, especially cationic pullulan wood adhesive; the present invention also relates to a preparation method of the adhesive. 2. Background technology [0002] With the scarcity and shortage of wood resources, wood adhesives are used more and more widely. At present, among wood adhesives, formaldehyde series adhesives are the most widely used. Formaldehyde series adhesives release harmful gases such as free formaldehyde during use, which seriously pollutes the environment and causes people to worry about environmental protection. Adhesives include synthetic polymer adhesives and natural polymer adhesives. Formaldehyde series adhesives belong to a 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 adhesive . Natural adhesives are generally water-soluble, and have l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J103/14
Inventor 莫元烈
Owner 莫元烈
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