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Emulsion type wood starch adhesive and preparation method thereof

A starch adhesive, emulsion type technology, applied in the direction of adhesives, graft polymer adhesives, polymer adhesive additives, etc., can solve the problems to be improved, etc.

Active Publication Date: 2014-03-12
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solid content, bonding strength and drying speed of starch glue prepared by some current processes need to be improved in order to be more widely used

Method used

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  • Emulsion type wood starch adhesive and preparation method thereof
  • Emulsion type wood starch adhesive and preparation method thereof
  • Emulsion type wood starch adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Formula (mass percentage, %):

[0026] Tapioca Starch 100

[0027] water 260

[0028] Hydrochloric acid aqueous solution (36%, m / m) 4

[0029] Vinyl acetate 88

[0030] Ammonium persulfate 1

[0031] Sodium Lauryl Sulfate 1.5

[0032] Polyvinyl alcohol 10

[0033] Urea 22

[0034] Glycerin 8

[0035] Tributyl phosphate 3

[0036] crafting process:

[0037] (1) Mix cassava starch and hydrochloric acid solution diluted to 1.5% to prepare high-concentration starch milk of 40% (w / w) based on starch dry basis, acid hydrolyze at 60°C for 2 hours, and use 0.2mol / L sodium hydroxide solution Adjust the pH to 4.0, add the initiator ammonium persulfate accounting for 50% of the total amount of the initiator added and the emulsifier sodium lauryl sulfate accounting for 50% of the total amount of the emulsifier added, adjust the temperature of the system to 70 ° C, slowly drop the The graft monomer vinyl acetate of graft monomer total addition 20%;

[0038] (2) Take out 1...

Embodiment 2

[0045] This example gives the comparison of the main properties of the starch adhesive for wood prepared by the traditional process and the starch adhesive for wood prepared by the binary seed method.

[0046] Formula (mass percentage):

[0047] cornstarch 100

[0048] Hydrochloric acid aqueous solution (38%, m / m) 4.5

[0049] water 240

[0050] Vinyl acetate 86

[0051] Potassium persulfate 1

[0052] Cetyltrimethylammonium bromide 2

[0053] Polyvinyl alcohol 7

[0054] Urea 16

[0055] Glycerin 4

[0056] Tributyl phosphate 2

[0057] Method 1 (process without binary seed method):

[0058] Mix cornstarch and hydrochloric acid solution into starch milk of 45% (w / w) on dry basis of starch, acidify at 65°C for 2.5h, adjust pH to 4.5 with 0.1mol / L sodium hydroxide solution, add 50% Initiator potassium persulfate and all emulsifier cetyltrimethylammonium bromide, slowly drop graft monomer vinyl acetate, add remaining potassium persulfate after 3h, react for 2h, add polye...

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PUM

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Abstract

The invention discloses an emulsion type wood starch adhesive and a preparation method thereof, which belongs to the technical field of adhesive preparation. With high-concentration starch milk as a main raw material, an emulsion type wood starch adhesive with a high solid content is prepared by a binary seed method. Compared with wood starch adhesives prepared by a traditional process, the product prepared by the preparation method is high in solid content, high in drying speed, good in film-forming property and high in bonding strength, and the comprehensive performance of the product reaches or exceeds the level of the currently commercially available high-quality white latex, so that the product can be widely applied to wood decoration and adhesion of artificial boards and plywood.

Description

technical field [0001] The invention relates to an emulsion-type starch adhesive for wood and a preparation method thereof, belonging to the technical field of adhesive preparation. Background technique [0002] Starch is an organic compound with abundant content in nature. It has the advantages of wide source, low price, renewable, completely degradable and non-polluting. A kind of adhesive for wood with low production cost, environmental protection and pollution-free can be prepared after acid hydrolysis, oxidation and graft copolymerization of starch. The solid content, bonding strength and drying speed of starch glue prepared by some current processes still need to be improved in order to be more widely used. The present invention aims at problems such as high viscosity of the system, uneven grafting reaction and poor storage stability caused by increasing the amount of starch and total solid content when the existing technology is applied to the preparation of high-sol...

Claims

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Application Information

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IPC IPC(8): C09J151/02C09J11/08C09J11/06C08F251/00C08F218/08C08F220/56C08F220/06C08F220/16C08F2/26
Inventor 程力顾正彪王潘军李兆丰洪雁
Owner JIANGNAN UNIV
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