JPS6195085A - Foam spray-type adhesive - Google Patents

Abstract

PURPOSE:To obtain the titled novel adhesive of high bonding strength, effective even on nonplanner adherend surface, suppressive in the infiltration into textiles such as cotton cloth, paper, by dissolving a specific resin in water or its mixture with organic solvent followed by gas-filling. CONSTITUTION:(A) (1) A polymer from a) (meth)acrylic acid (lower alkyl ester, amide, alkylolamide) and b) polymerizable di- or tricarboxylic acid such as itaconic acid or 3-butene-1,2,3-tricarboxylic acid (mono), dialkyl ester, etc.), (2) a polyvinyl polymer, or (3) naturally-occurring matter such as starch or cellulose (carboalkoxy, hydroxy derivative(s)) is dissolved in (B) (i) water or (ii) a mixture of water and an organic solvent compatible therewith (e.g., lower alcohol, alkylene glycol) followed by gas-filling using from, LPG, DME, etc., thus obtaining the objective adhesive.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a book related to foam powder spray adhesive,
More specifically, a foam-like 1'JF atomized water-soluble adhesive is produced by dissolving a resin soluble in water or a water-compatible organic solvent in water or a mixed solution of water and an organic solvent, and filling the solution with gas. It is a drug.

Generally known adhesives include water** type and solvent type adhesives, which are used in liquid, solid, paste, and spray forms.

When using adhesives, methods such as impregnation and application force are applied to the object to be adhered, but the method of use is spraying.
It's simple. Solvent type adhesives are known as spray adhesives (Japanese Patent Publication No. 45-22239), but K2.41. If the water-soluble adhesive is made into a spray, the resin component, that is, the resin that is soluble in water or a water-compatible organic solvent, is dissolved in water or a mixture of water and an organic solvent, and then filled with gas. A new product that maintains a foam powder-like form when sprayed, suppresses the penetration of the adhesive into the fibers of cotton cloth, paper, etc., maintains adhesive strength, and has an adhesive function even when the surface of the object to be adhered is not flat. It is an adhesive.

In carrying out the present invention, resins that can be used are those that are soluble in water or water-compatible organic solvents, such as acrylic acid, methacrylic acid and its lower alkyl etch, amide, and akylo! Amide, itaconic acid, 3-butene-1,2,5-)rica! Polymerizable dicarboxylic acid such as bonic acid, tricarboxylic acid and its mono- or cyano-kinu-nute-mu polymers, polyvinyl polymer, starch, cellulose and other natural products and their strength μ pore p-coxy, hydroxy It is a known adhesive and adhesive compound such as rust conductor.

After using the adhesive, check the softness of the object (cotton cloth, etc.)
Hardness, texture, etc. may be required.

In these cases, the viscosity, solids content, and preparation of the resin for making the preparation before gas filling, whose composition ratio in the polymer of the composition may be changed and whose properties may be changed by conventional techniques. Alcohol in liquid form! The content and the ratio of liquid to gas during gas filling will affect the state and properties of the foam during spraying.

That is, the resin viscosity is low, the solid content concentration is low, and the alcohol μ
If the content is large, bubbles disappear quickly during spraying, the resin permeates into the adhered object quickly, and paper properties (such as cotton cloth) deteriorate.

On the contrary, the viscosity is high, the solid content apE is high, and alcohol-1~
If the content is low, the IvIF mist at low temperatures will reduce the drying speed of the mackerel, making it unusable.

, the ratio of the prepared liquid to the gas is 2o+ao to 9o++.

It is also possible to use solvents.

The gas may be a known gas such as chlorofluorocarbon, LPG, DMK, etc. alone or as a mixture. The container is preferably made of aluminum, tin, etc., preferably a can coated with a plastic film on the inside.

It is best to use pulp with a large inner diameter tube, and the way the bubbles come out during spraying can be controlled by gas pressure.

As described above, spray adhesive can be manufactured, but
Colorants, fragrances, foaming agents, thickeners, etc. may be added to this.

The present invention will be explained below with reference to Examples.

Example 1) Acrylic acid ethyl ester/L/95 parts, acrylic acid, /L/
Polymerization was carried out using 5 parts of acid, and the degree of polymerization was +, 000. Viscosity 2,5
000 units, a resin with a solid content of 35% was obtained. Add monoethanolamine to adjust the pH to 8.2, and add 60 parts of this to ethi!
Y4-made t- with a ratio of 20 parts of Akko/I and 20 parts of water.
1111, y Roy -LpG (8:3) and O ratio 70
+ Filled with 30 te. When sprayed, it appeared as white foam powder. This was sprayed onto a polyethylene sheet, and the drying time was 2
It took 3 minutes.

It was used for striped bandages, dried in about 26 minutes, and exhibited adhesive charcoal binding (handling) to prevent bandages from slipping.

Examples 2 to 5) In the same manner as in Example 1), resins having the following formulations were produced and filled with gas.

Methacrylic acid 5 Acrylamide
42 itaconic acid
42nd MC (Part) 11
10 0 54, Applicant Kinki Aerosol Industries Co., Ltd. Taiyo 10 Gyo Co., Ltd.

Claims (1)

[Claims] A spray-type water-soluble adhesive in the form of foam powder, which consists of dissolving a resin soluble in water or a water-compatible organic solvent in water or a mixture of water and an organic solvent, and filling the mixture with gas.