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Adhesive for superposition

A technology of adhesives and emulsions, applied in the direction of adhesive types, adhesives, polyurea/polyurethane adhesives, etc., which can solve the problems of difficult performance, cold resistance, insufficient heat resistance, and reduced heat resistance.

Inactive Publication Date: 2009-01-07
SHOWA DENKO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adhesive disclosed in Patent Document 1 is not sufficient in terms of cold resistance and heat resistance required for this application, and various organic solvents, plasticizers, etc. are added in order to improve the cold resistance. Causes a decrease in heat resistance, and it is difficult to have both performances at the same time

Method used

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Examples

Experimental program
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Embodiment

[0038] Next, the present invention will be described in more detail based on examples. In addition, this invention is not limited to these Examples.

[0039] In addition, glass transition temperature of ethylene-vinyl acetate copolymer emulsion, benzene elution rate, preparation of samples for adhesive force measurement, normal state adhesive force, water-resistant adhesive force, and low-temperature adhesiveness using the samples And thermal creep resistance was measured according to the following method.

manufacture example 1

[0041]

[0042] Add 800 g of water and 60 g of partially saponified polyvinyl alcohol (saponification degree: 88%) to a 3 L autoclave, pressurize with ethylene, and add 1,000 g of vinyl acetate and diallyl phthalate as an internal crosslinking agent dropwise. 20 g of the ester was used to prepare an ethylene-vinyl acetate copolymer emulsion with a solid content of 55%. During production, the pressure of pressurized ethylene was varied from 2 to 6 MPa to produce four types of ethylene-vinyl acetate copolymer emulsions having different glass transition temperatures. (EVA-1: glass transition temperature 10°C), (EVA-2: glass transition temperature -8°C), (EVA-3: glass transition temperature 25°C), (EVA-4: glass transition temperature - 20℃)

manufacture example 2

[0044]

[0045] Add 800 g of water and 60 g of partially saponified polyvinyl alcohol (the degree of saponification is 88%) in a 3L autoclave, pressurize with ethylene, add 1020 g of vinyl acetate dropwise, and trial-produce a polyvinyl alcohol with a solid content of 55% and a glass transition temperature of Two types of ethylene-vinyl acetate copolymer emulsions at 10°C and -8°C. (EVA-5: glass transition temperature 10°C), (EVA-6: glass transition temperature -8°C)

[0046] Table 1 shows the characteristic values ​​of the produced (A) component ethylene-vinyl acetate copolymer emulsion.

[0047]

[0048] Adhesives were prepared according to the compounding recipes shown in Table 2 and Table 3. While mixing the three components (A), (B) and (C), in order to promote the film-forming properties of the emulsion, 6 parts by mass of butyl carboxylate was added to 100 parts by mass of the ethylene-vinyl acetate copolymer emulsion. Must alcohol acetate, made into adhesive.

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Abstract

The invention provides an adhesive which is used for polyolefin and comprises ethylene- vinyl acetate copolymer latex, aqueous polyurethane latex and hydrazine derivatives. The adhesive used for polyolefin is provided with good normality and water resistant adhesiveness, perfect heat resistance (creep resistance) and cold resistance and is a useful new polyolefin used adhesive for overlapping used adhesive.

Description

technical field [0001] The present invention relates to an adhesive for polyolefins, and more specifically, to an adhesive for polyolefins excellent in cold resistance, heat resistance, and the like as an overlay. Background technique [0002] Adhesives for overlapping are used for pasting of plastic film and paper for packaging, plywood, MDF (medium fiberboard), (fiber) laminated wood, etc. used in various building materials, etc. Adhesion of boards or inorganic boards such as slate boards and gypsum boards to plastic films. [0003] Conventionally, ethylene-vinyl acetate copolymer emulsions, polyvinyl acetate emulsions, carboxylic acid-modified aqueous polyurethane emulsions, and various organic solvents have been used as adhesives for lamination. [0004] However, conventional adhesives are insufficient in adhesive strength, especially water-resistant adhesive strength, and thermal creep resistance. In addition, depending on the type of plastic film, for example, a poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08B32B37/12C08J5/12C09J175/04
Inventor 岛崎伸溝田和也
Owner SHOWA DENKO KK