JPH10158620A - Synthetic resin adhesive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a synthetic resin adhesive which dries quickly and does not wrinkle a paper to be bounded by using a colloidal soln. of an acrylic ester copolymer, etc., as the self-adhesive component and by adding a polyvinyl alcohol soln. in an amt. twice that usually used, a suitable amt. of propylene glycol, and a surfactant to the colloidal soln. SOLUTION: This adhesive is prepd. in the normal way except that an aq. polyvinyl alcohol soln., prepd. by dissolving polyvinyl alcohol in hot water, in an amt. about twice that usually used is cooled and then mixed, under stirring, together with a suitable amt. of propylene glycol and a surfactant into the self-adhesive component. An example of the self-adhesive component is a colloidal soln. of a butyl acrylate copolymer. Polyvinyl alcohol has a function of stabilizing a tackifier emulsion, exhibits pressure-sensitive adhesive properties, and imparts properties similar to those of a gum arabic paste, etc., to the adhesive. The addition of polyvinyl alcohol in an amt. about twice that usually used (usually, in an amt. of 14-15%) inhibits water and a high-molecular compd. from permeating into a paper and prevents the occurrence of wrinkles at the bonded parts of the paper.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin adhesive used for attaching paper for school use, home use, or office use.

[0002]

2. Description of the Related Art In the past, synthetic resin adhesives used for sticking paper for school use, home use, office use, etc., have been dried as quickly as possible by industry companies, and furthermore, the places to be stuck are not wrinkled. Efforts have been made to provide synthetic resin-based adhesives.

[0003] Among them, there has been known a synthetic resin adhesive which has been developed so as to dry as soon as possible when paper is adhered thereto, in which alcohol is added, mixed and stirred to adjust the viscosity.

[0004] However, it has been pointed out that a synthetic resin-based adhesive mixed with alcohol and mixed and stirred first has an odor peculiar to alcohol and is volatile, and as a result, has a disadvantage of being flammable. I was

[0005] Further, when paper is bonded, wrinkles are generated at the bonding position. For example, when a cutout article such as newspaper or magazine is pasted on a scrapbook, wrinkles are generated at the bonding position for each page. The result is a thick scrapbook, which has the disadvantage of preserving it first.

Furthermore, when used in papermaking as a learning material for children and children, wrinkles occur at the places where the papers are stuck, and the paperwork dries in a wavy state, resulting in an unusual work. There was an inconvenience.

[0007] Conventional synthetic resin-based adhesives tend to cause an anchor phenomenon by permeating a polymer, which is a constituent component of the synthetic resin-based adhesive, with water as a solvent in order to increase the adhesive strength of paper, thereby causing anchorage. It was made based on the idea.
Therefore, conventionally, these inconveniences have been considered as inevitable inconveniences.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a synthetic resin adhesive used for academic purposes, home use, office use, and the like. An object of the present invention is to provide a synthetic resin-based adhesive which solves the inconvenience which has been caused, dries quickly, and does not wrinkle at a bonding portion.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a method for producing a synthetic resin-based adhesive according to a conventional method. Add an appropriate amount of agent, mix,
It was configured as a synthetic resin adhesive manufactured by stirring.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the synthetic resin adhesive of the present invention, the amount of polyvinyl alcohol to be added is about twice the amount of the usual amount, and a surfactant is added, mixed and stirred in addition to this. Water, which is a solvent of the resin adhesive, does not permeate the paper, and the paper bonding portion does not wrinkle.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a method for producing a synthetic resin adhesive according to a conventional method, for example, a method in which an acrylic acid ester copolymer is used as an adhesive component to form a colloid solution, polyvinyl alcohol is dissolved therein, added, mixed and stirred. To make.

As the ester group of the acrylic copolymer ester used in the present invention, those having an ethyl group, a butyl group, a hexyl group, a niethylhexyl group, a nonyl group, a dotedyl group and the like are used, but the purpose is to improve the adhesiveness. It is preferable to use a higher ester of futyl ester or higher.

[0013] As the copolymerized monomer, ordinary copolymerized ones are used. Among them, acrylonitrile, vinyl chloride, vinyl acetate, vinylidene chloride, styrene and the like are included, but are not particularly limited thereto. For the dimer polysynthesis, those having a trimeric copolymer or higher are used.

The adhesive of the present invention is used for bonding paper. However, since polyvinyl alcohol as an adhesive is present in the adhesive, it is not sticky like a conventional adhesive, and its use is conventionally It has the same properties as Arabic gum paste and can be used like conventional products.

The polyvinyl alcohol used in the present invention has a function as a preservative of the emulsion, and provides a long-term stability of the colloid.

The present invention is based on the fact that a large amount of polyvinyl alcohol as an emulsion stabilizer is present in an emulsion of an acrylic ester, so that it is excellent in that it functions not only as an adhesive but also as a pressure-sensitive adhesive as an adhesive. This is based on the discovery that an adhesive can be obtained.

Conventionally, various natural and synthetic polymer solutions have been used as room-temperature adhesives for paper. However, since these use solvents or water as solvents, they are used after the adhesive is applied. It takes a considerable amount of time to complete the bonding.

Normally, 14-15 of polyvinyl alcohol
In the present invention, about twice as much as usual was added, mixed and stirred, and the amount was dissolved in hot water about twice as much as usual, and when the temperature reached 40 ° C. or lower, added, mixed and stirred. In addition, propylene glycol and a surfactant were added, mixed, and stirred.

As a result, the viscosity is increased, and
The polymer permeability was suppressed, and the surface tension of the synthetic resin adhesive added surface was increased.

There were no dry wrinkles at the places where paper was bonded with this synthetic resin adhesive.

[0021]

The pressure-sensitive adhesive according to the present invention can freely change the degree of tackiness by adjusting the amount of polyethylene vinyl alcohol mixed into the pressure-sensitive adhesive emulsion.
Its properties can be arbitrarily changed from a paste to a thin paste.
Further, the adhesiveness and adhesiveness can be arbitrarily adjusted according to the mixing ratio of the polyvinyl alcohol and the acrylate.

Claims (1)

[Claims] In a conventional method for producing a synthetic resin adhesive, after dropping the temperature, polyvinyl alcohol dissolved in boiling water is added in an amount about twice the normal amount, and propylene glycol and a surfactant are added in appropriate amounts, mixed and stirred. A synthetic resin-based adhesive characterized by being manufactured by: