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Water-resistant adhesive composition for wood

A technology of adhesives and compositions, applied in the direction of adhesives, adhesive types, unsaturated alcohol copolymer adhesives, etc., to achieve the effects of excellent coating and wettability, excellent water resistance adhesion, and excellent adhesion

Inactive Publication Date: 2008-09-17
株式会社大鹿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The object of the present invention is to solve the above problems, and to provide an inexpensive wood adhesive composition with a long service life, excellent water resistance and heat resistance, which does not release the Complications, chemical allergies, etc. formaldehyde or irritating odor, and does not cause skin rashes, stains, discoloration of wood, and does not cause problems such as foaming and viscosity increase

Method used

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  • Water-resistant adhesive composition for wood
  • Water-resistant adhesive composition for wood
  • Water-resistant adhesive composition for wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In this embodiment, add carboxy-modified styrene-butadiene synthetic latex resin modified with itaconic acid (terpolymerization of 2.3% by weight of itaconic acid, 28% by weight of butadiene, 69.7% by weight of styrene 100 parts by weight of resin components, 100 parts by weight, 15 parts by weight of random copolymerized carboxy-modified polyvinyl alcohol polymers modified by itaconic acid (polymerization degree 1700, modification amount 2 mol%, saponification degree 98 mol%) 100 parts by weight of an aqueous solution, and N, N, N', N'-tetraglycidyl-m-xylylenediamine ( 10 parts by weight of Mitsubishi Gas Chemical Co., Ltd., trade name: TETRAD-X) was stirred to prepare a water-resistant adhesive composition for wood.

[0048] In the water-resistant adhesive composition for wood, with respect to 100 parts by weight of the resin component contained in the carboxyl-modified styrene-butadiene synthetic latex resin, the carboxyl-modified polyvinyl alcohol polymer is added t...

Embodiment 2

[0054] In this example, instead of the carboxy-modified styrene-butadiene synthetic latex resin used in Example 1, a carboxy-modified styrene-butadiene synthetic latex resin modified with acrylic acid (acrylic acid 5% by weight , butadiene 31% by weight, styrene terpolymer of 64% by weight, and resin component 50% by weight), a water-resistant adhesive composition for wood was prepared in exactly the same manner as in Example 1.

[0055] Next, except for using the water-resistant adhesive composition for wood obtained in this example, a test panel was produced in exactly the same manner as in Example 1, and the normal strength, water resistance, and water resistance of the test panel were measured in the same manner as in Example 1. Hot water strength, resistance to repeated boiling strength.

[0056] Table 1 shows the measurement results of the adhesive strength (MPa). In addition, the percentage of the fractured area of ​​the xylem to the area of ​​the bonding surface is sh...

Embodiment 3

[0058] In this embodiment, except that instead of the carboxy-modified styrene-butadiene synthetic latex resin used in Example 1, a carboxyl-modified styrene-butadiene synthetic latex resin modified with acrylic acid (acrylic acid 10 wt. %, butadiene 31% by weight, styrene 59% by weight terpolymer, resin component 50% by weight), a water-resistant adhesive composition for wood was prepared in exactly the same manner as in Example 1.

[0059] Next, except for using the water-resistant adhesive composition for wood obtained in this example, a test panel was produced in exactly the same manner as in Example 1, and the normal strength, water resistance, and water resistance of the test panel were measured in the same manner as in Example 1. Hot water strength, resistance to repeated boiling strength.

[0060] Table 1 shows the measurement results of the adhesive strength (MPa). In addition, the percentage of the fractured area of ​​the xylem to the area of ​​the bonding surface i...

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Abstract

An inexpensive adhesive composition for wood which emits neither formaldehyde nor an irritative odor, causes neither skin rashes nor wood fouling / discoloration, has a long pot life, and is excellent in water resistance and heat resistance. The composition comprises: a main ingredient comprising a carboxy-modified aqueous emulsion or latex resin and an aqueous solution of a carboxy-modified polyvinyl alcohol polymer; and a compound having an N,N-diglycidylamino group as a tetrafunctional epoxy compound having a tertiary amino nitrogen atom. It comprises 100 pts.wt. of a carboxy-modified aqueous emulsion or latex resin having a modification amount of 0.1 to 20 wt.%, 0.2 to 270 pts.wt., in terms of resin amount, of an aqueous solution of a carboxy-modified polyvinyl alcohol polymer having a modification amount of 0.1 to 10 mol% and a degree of polymerization of 100 to 6,000, and 0 to 700 pts.wt. of a filler, and further contains 3 to 200 pts.wt. of the compound having an N,N-diglycidylamino group per 100 pts.wt. of the main ingredient.

Description

technical field [0001] The present invention relates to a water-resistant adhesive composition for wood, in particular to a water-resistant adhesive composition for wood used in the manufacture of plywood or the secondary processing of plywood. Background technique [0002] Conventionally, wood adhesives using polyvinyl alcohol resins have been widely used. The polyvinyl alcohol resin has extremely excellent adhesion to cellulose, but is poor in water resistance and heat resistance. Therefore, formaldehyde resin-based adhesives for wood are known in which formaldehyde resins such as urea-formaldehyde resins, resorcinol-formaldehyde resins, and melamine-formaldehyde resins are blended with the polyvinyl alcohol resin to impart water resistance and heat resistance. [0003] However, free formaldehyde derived from the formaldehyde resin remains in the formaldehyde resin-based wood adhesive, so products bonded using the formaldehyde resin will release the formaldehyde, causing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J11/00C09J129/04C09J163/00C08G59/32C08L29/04
CPCC09J129/04C08L29/04C09J163/00C08K5/17C08L63/00C08L2205/03C08G59/3227C08L2666/02C08L2666/04
Inventor 岩崎雅春森永博泰村田裕司
Owner 株式会社大鹿