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Polyurethane resin liquid disperse colloid and liquid adhesives

A polyurethane resin, water-based dispersion technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problem of not fully satisfying the spreadability of the applied adhesive, the permeability of the porous substrate, the bonding strength, the surface Tension and other issues

Inactive Publication Date: 2004-01-21
DIC CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adhesive prepared from this dispersion liquid has a small particle size of polyurethane resin, but because no substantive surfactant is added, it has a relatively large surface tension as in JP-A-53-26897, so there is no Problems such as spreadability when applying adhesives, permeability to porous substrates, and adhesive strength cannot be fully satisfied

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0085] The present invention will be described in detail below through examples and comparative examples, but the present invention is not limited to the following examples. Under the condition that there is no special explanation below, all parts and % are weight standards.

[0086] In addition, the evaluation method of the adhesive performance of the polyurethane resin aqueous dispersion colloid of this invention is as follows. The results are shown in Table 1-3. The dosage in each table is in "part".

[0087] [Measurement method of particle size]

[0088] Using a laser refraction / scattering type particle size distribution measuring device (Horiba Manufacturing Co., Ltd., LA-910), using water as a dispersion liquid, the average particle size when the relative refractive index of the polyurethane resin water-based dispersion colloid is 1.10 and the particle size standard is the area is measured. diameter and 90% particle size (screened). The 90% particle size mentioned he...

preparation example

[0108] Add 60 parts of methyl ethyl ketone (abbreviated as MEK) to 50 parts of polyester polyol (1), stir and dissolve it fully, then add 44 parts of isophorone diisocyanate (abbreviated as IPDI), and react at 80°C for 3 hours . Immediately after adding 110 parts of MEK and cooling to 60°C, add 2 parts of neopentyl glycol and 160 parts of butylene adipate, a polyester formed from 1,4-butanediol and adipic acid (hydroxyl = 56 mgKOH / g) , and the prepolymer reaction was carried out at 80°C. When the isocyanate value drops below 0.89%, cool the system to 40°C, and evenly dissolve 3.6 parts of Nevocol YSK (dialkyl sulfosuccinate sodium salt active ingredient) in 300 parts of water prepared in advance while stirring. 70% Nevocol aqueous solution manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.) was dropped into the prepolymer, and 35 parts of 10% piperazine aqueous solution (relative to the residual isocyanate group, the amine group was 90 %) for emulsification and di...

Embodiment 2

[0111] Add MEK60 part to 40 parts of polyester polyol (1), stir and dissolve it thoroughly, then add IPDI44 part, and react at 80°C for 3 hours. Immediately after adding 105 parts of MEK, after cooling to 60°C, add 3 parts of neopentyl glycol, 160 parts of polyester formed from 1,4-butanediol and adipic acid, that is, butylene adipate (hydroxyl value = 56mgKOH / g) Prepolymer reaction at 80°C. When the isocyanate value drops below 0.94%, cool the system to 40°C, and evenly dissolve 7.2 parts of Nevocol YSK (dialkyl sulfosuccinate sodium salt active ingredient) in 300 parts of water prepared in advance while stirring. 70% Nevocol aqueous solution (manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.) was dropped into the prepolymer, and 36 parts of 10% piperazine aqueous solution (relative to the residual isocyanate group, the amine group was 90 %) for emulsification and dispersion, and desolvation of the obtained emulsion to obtain a water dispersion colloid containing 50% o...

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PUM

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Abstract

An aqueous urethane resin dispersion for bonding can be used in wet lamination and dry lamination and can be reactivated easily at a low temperature of about 50 to 70 DEG C after drying, and is also superior in coatability, adhesive strength, and heat resistance. The aqueous dispersion of a polyurethane resin is superior in contact adhesiveness immediately after lamination and also has good permeability and good coatability not only on bases having smooth surfaces such as plastics and metals, but also on porous bases such as fibers, papers, and buffed leathers; an aqueous adhesive using the aqueous dispersion; and an article to which it is applied. The aqueous polyurethane resin dispersion has at least one of a sulfonate group and a carboxylate group, wherein an average particle diameter of the polyurethane resin is 0.05 to 0.30 mu m and a surface tension of the aqueous dispersion (A) is 40 mN / m or less.

Description

technical field [0001] The invention relates to a polyurethane resin water-based dispersion colloid mainly suitable for water-based adhesives and its use as an adhesive. Background technique [0002] Generally, when using polyurethane aqueous solution or dispersion to bond rubber, leather, metal, glass, polyvinyl chloride (PVC) and other plastics, foams, fibers, paper and other substrates, the bonding strength and heat resistance are equally important. Adhesive brushability. [0003] The methods of pasting substrates coated with water-based disperse colloid adhesives include: wet lamination in which the adhesive is applied to the substrate without removing moisture and directly pressed and bonded; or after moisture is removed and dried, in an adhesive state Sticky dry lamination. Generally, when the adhesive is applied to smooth and non-permeable substrates such as metal, plastic, glass, etc., it is not necessary to require its penetration performance in order to reflect t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/00C08G18/08C08G18/12C08G18/46C08G18/65C08G18/66C09J175/04
CPCC08G18/6659C08G18/0823C08G2170/80C08G18/0828C08G18/4676Y10T428/31551C08G18/12C08G18/3246C08J3/00
Inventor 久场一生北田满
Owner DIC CORPORATION
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