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Water-based two-component adhesive

A technology of water-based adhesives and adhesives, which is applied in the direction of adhesive types, chloroprene adhesives, adhesives, etc., and can solve problems such as complex spraying equipment

Inactive Publication Date: 2016-03-30
HENKEL KGAA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But such a process requires complex spraying equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Prepare the mixture from:

[0052] Polychloroprene dispersion (Dispercoll C74 and C84, 1:6; about 55% solids)

67％

Polyacrylate dispersion (Acronal S 400, about 56% solids)

9％

Styrene / butadiene dispersion (Intex 131, about 65% solids)

17.8％

Plasticizer (benzyl methyl)

1.8％

Sodium Lauryl Sulfate (10%)

2.7％

Anti-aging agent

1.3％

Buffer solution (composed of glycine, borax, NaOH, ammonium bicarbonate)

About 0.5%

[0053] The components are mixed under a high-speed stirring system. The result is an adhesive that can be stored stably with a solids content of about 55% by weight. Its pH is about 12. The viscosity of the adhesive is about 300 mPas.

[0054] An activator solution composed of 10% citric acid aqueous solution was prepared.

[0055] Remove the adhering dust from the surface of the substrate (5×10 cm) composed of wood and solid foam material. The adhesive dispersion layer (about 180g / m 2 ) Coated on it.

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PUM

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Abstract

Process for bonding two substrates, wherein one substrate is coated with a layer of an aqueous adhesive based on a dispersion of chlorinated polyolefins and additives, said dispersion having a pH of 10 -13; in a subsequent process, coating an activator solution on the first or second substrate, the activator solution comprising a substance containing an acidic group; and bonding the coated under light pressure s surface. Two-component adhesive consisting of a storage-stable aqueous adhesive dispersion comprising 25-50% by weight of chlorinated polyolefins and an activator solution as the second component , 5-30% by weight of other polymers, additives and water, and the pH is 9-13, the activator solution contains carboxylic acid, sulfonic acid, phosphoric acid, polymers containing carboxylic acid groups or sulfonic acid groups, inorganic acids salts or Lewis acids, and water and / or organic solvents.

Description

Technical field [0001] The present invention relates to a method for bonding substrates using an aqueous adhesive based on chlorinated polyolefins, wherein at least one substrate has a corresponding adhesive layer, and the adhesive is provided with an additional activator layer. Background technique [0002] Solvent-containing adhesives based on chloroprene are known. In this situation, the binder is applied as a solution or dispersion, and the solvent can evaporate thereafter. This application mode is time-consuming and the solvent content cannot meet current environmental protection requirements. Aqueous binders such as chloroprene dispersions are also known. In this context, various reagents are used to adjust or lower the pH of the binder dispersion. [0003] WO98 / 53019 describes an aqueous polychloroprene-based adhesive containing boric acid. In this scenario, the pH is set between 7-9.5. These adhesives are coated on the substrate, and then the substrate is bonded. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J5/04C08J5/12C09J111/02
CPCC08J5/127C09J5/04C09J123/28C09J2411/00C08L2666/02
Inventor J·洛伦茨R·劳特尔J·金勒E·柯尼希
Owner HENKEL KGAA