KR20000030217A - Adhesive of two component acrylic urethane emulsion - Google Patents

Abstract

PURPOSE: An adhesive having high adhesive strength, thermal resistance and water resistance is provided which is used by adding urethane in aqueous acryl emulsion urethane adhesives prior to applying. CONSTITUTION: The aqueous acryl emulsion urethane adhesive is obtained from a method characterized in that urethane curing agent consisting of 20-30 wt.pts. of diisocyanate, 35-45 wt.pts. of polyol, 5-10 wt.pts. of catalyst and additives, and 25-40 wt.pts. of solution is added to aqueous acryl emulsion adhesive consisting of 40-70 wt.pts. of acryl emulsion of 60%, 10-25 wt.pts. of adhesive paste of 50%, 30-45 wt.pts. of stone powder such as calcium carbonate, silica and talc, and 3-10 wt.pts. of additives such as dispersing agent, viscosity improving agent, plasticizer and stabilizer.

Description

Two-component aqueous acrylic emulsion-based urethane adhesive {Adhesive of two component acrylic urethane emulsion}

The present invention is a method for producing an aqueous acrylic emulsion-based urethane adhesive by using an aqueous acrylic emulsion adhesive, and a mixture of vinyl acetate emulsion and urethane hardener of a similar method is used for joining wood, but until now acrylic emulsion and urethane hardener There is no adhesive prepared by using the present invention. The present invention is made by using a special urethane curing agent that reacts with an acrylic emulsion. none.

In particular, the present invention may be used alone as an adhesive by using the adhesive properties of the acrylic emulsion, and a suitable amount of the urethane curing agent is mixed, so it relates to a technology that can be used as a strong adhesive by improving performance with an aqueous acrylic emulsion-based urethane adhesive.

The purpose of the present invention is to obtain the advantages of the acrylic emulsion adhesive in the idea of simplifying the adhesive used for each method and use according to the characteristics of each synthetic resin by the advantages of each resin, the initial adhesion, long adhesion time, easy workability of cream It is mainly used as the FBC flooring tile adhesive for building by using properties such as non-flammability, low odor, alkali resistance and storage stability, but it is applied to heating and moisture generating places and special materials due to the lack of adhesive strength, heat resistance and water resistance. In this special condition, one-component moisture-curable oil-based urethane adhesives or synthetic rubber-based, epoxy-based, and two-component oil-based urethane adhesives are used. Therefore, odor, flammability, uncomfortable workability and labor cost increase, defect occurrence, It is inconvenient due to impossibility of repair and poor storage stability. Emulsion is used as the adhesive part to the lack of performance.

In order to solve this shortage, the present invention solves high adhesive strength, heat resistance, and water resistance by preparing a urethane curing agent that maintains the advantages of an acrylic emulsion as it is and mixing it immediately before use.

Composition and weight combination of the general-purpose acrylic emulsion adhesive used to achieve the above object is shown in Table 1

Table 1

Acrylic Emulsion-60% ----------------------- 40-70 parts

Tackifier-50% ------------------------- 10-25

Stone powder (calcium carbonate, silica, talc) ---------------- 30-45 parts

Additives (dispersion, defoaming, thickening, plasticizer, stabilizer) ------ 3-10 parts

100 copies

(Solids; 60-75% viscosity; 200-400 poise density; 1.1-1.4)

In addition, the structure of the urethane hardener used in addition to the said acrylic emulsion adhesive is shown in Table 2.

Table 2

The isocyanate ---------------------- 20-30

Polyol --------------------------------- 35-45

Catalyst and special additives ---------------------- 5-10

Solvents (toluene, ketone, etc.) ------------------ 25-40

100 copies

(Solids; 60-75% viscosity; 20-60 poise density; 0.95-1.1)

In other words, by adding 7-25 parts of the urethane hardener of Table 2 to the aqueous adhesive of Table 1, the reaction is completed by first reacting with the hydrooxyl group in the emulsion of Table 1 and then slowly reacting with water. For this purpose, the catalyst and special additives are added in the composition of Table 2, and the hydrooxyl group of the emulsion is reacted before the water, and it is designed to suppress the foaming reaction, so there is no bubble on the coated surface. Increases.

Therefore, the adhesive to which the urethane curing agent is added as described above has higher adhesive strength than the acrylic emulsion adhesive and turns into a thermosetting resin, thereby improving the heat resistance and water resistance, and there is no change in the advantages of the acrylic emulsion adhesive, so there is no inconvenience in use.

The above-mentioned technical contents are added and used in small amounts considering the field construction first, so that the mixing is easy and the colors are different so that the mixing state can be confirmed, there is no change in viscosity, cost-effectiveness such as material cost labor cost, inventory burden and material Simple management makes it easy to manage.

As it uses water-based adhesives, it is safe from fire hazards and the adhesion retention time is long, so it can eliminate adhesion defects, and it can be easily repaired by the initial construction. It can replace epoxy adhesive.

This invention can be used as an aqueous acrylic adhesive alone, and depending on the situation, it is a universal water-based adhesive that can be a product of one stone or two because it can control the increase in physical properties by adding a urethane additive at the discretion of the contractor.

Claims (1)

In order to increase the physical properties such as heat resistance, water resistance, etc., rather than using acrylic emulsion adhesive alone, to bond flooring materials (such as FBC materials, print tiles, rubber tiles, artificial turf, etc.) or construction, industrial, and furniture materials. An aqueous acrylic emulsion-based urethane adhesive prepared by using a urethane curing agent (Encio 4-11%) by adding 7-25 parts to the weight of an acrylic emulsion-based adhesive.