JPS5833898B2 - Resin solution for spray paint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a resin solution for spray paint, in particular a resin solution for spray paint that uses a vinyl chloride copolymer resin solution as a spray paint and uses its stringability to form a coating film between frames. Regarding.

The conventional coating method is called the Mayu method, that is, the average degree of polymerization is 45.
About 0, vinyl chloride 87% by weight, vinyl acetate 13% by weight
An organic solvent solution of the copolymer containing vinylidene chloride resin is sprayed between the frames using a spray gun to form a filamentous network, and then a copolymer containing 85% by weight of vinyl chloride and 15% by weight of vinyl acetate is added on top of this. Spraying a resin solution containing a polymer,
A method of forming a coating film is known.

The stringing resin liquid used in this method does have stringy properties, and the shape of the thread changes after being sprayed, so there are few problems when it is simply used for packaging utensils.

However, for example, when forming Japanese paper-like paper or manufacturing electric lampshades by the cocoon method, it is not preferable because the thickness and length of the threads change.

The shape of the thread generally changes depending on the viscosity of the resin solution, the spraying conditions of the spray gun, and the device, but even if these conditions change slightly, the shape of the thread after spraying the resin solution does not change. It is requested.

In addition, when using this technology to manufacture rotating objects, such as light fixtures such as electric lampshades, when thread resin liquid is sprayed onto the crosspiece frame, the entangled threads become slack due to centrifugal force. As this occurs and the organic solvent evaporates, it is necessary for the yarn to shrink and the coating to be in a taut state, but none of the resin solutions described above has satisfied these conditions.

The purpose of the present invention is to provide a resin solution for specific uses that solves these drawbacks, and which contains vinyl chloride/vinyl ester copolymer as the main component, and further contains vinyl chloride/vinyl ester copolymer.
When an organic solvent solution containing a vinyl ester/maleic acid copolymer is sprayed with a spray gun, the stringiness is good, the thread thickness and length are uniform, and the coating film forms after the solvent evaporates. It has the effect of making you nervous.

That is, in the present invention, the average degree of polymerization is 600 to 1200, vinyl chloride is 30 to 70% by weight, and vinyl ester is 70 to 30% by weight.
100 parts by weight of copolymer and average degree of polymerization 200-4
501 vinyl chloride 87-70% by weight, vinyl ester 1
The component ratio is 3 to 30% by weight, and the copolymer 8 to 40 is copolymerized with 1 to 3% by weight of maleic acid.
The resin solution for spray paint is characterized by containing 15 to 25% by weight of the resin by weight and forming a fiber film between the crosspiece frames.

The present invention is a volatile organic solvent solution containing a binary and ternary vinyl chloride copolymer as a main component, to which a stabilizer and a plasticizer can be further added depending on the conditions of use. .

The present invention will be further explained in detail below.

The copolymer of vinyl chloride and vinyl ester (hereinafter referred to as the first component), which is a component of the present invention, has an average degree of polymerization of 600 to 1.
200. Preferably 800 to 1150, vinyl chloride 3
It is a copolymer containing 0 to 70% by weight and 70 to 30% by weight of vinyl ester.

However, when only this is dissolved in an organic solvent to make a resin solution and used as a spray paint, it has sufficient stringability, but the adhesion to the frame and the intertwining of the threads are poor, resulting in a fluffy state. .

However, a polymer (hereinafter referred to as The object of the present invention can be achieved by allowing 8 to 40 parts by weight of the second component (referred to as a second component) to be present in the volatile organic solvent based on 100 parts by weight of the polymer.

If the amount of vinyl chloride as the first component contained in the resin solution of the present invention exceeds 70% by weight, the viscosity of the solution will increase, and when threads are drawn, only thin threads will be obtained and the strength of the threads will be reduced.

Furthermore, if the vinyl chloride content is less than 30% by weight, the vinyl ester component will increase, resulting in large temperature dependence and the disadvantage that the tension of the threads will loosen at high temperatures.

Moreover, when the average degree of polymerization exceeds 1200, the solution viscosity becomes high and the thread becomes thin.

If it is less than 600, the stringability will be reduced and the yarn will be short,
The threads become intertwined.

Further, the second component contained in the resin solution of the present invention has the function of imparting adhesive properties in addition to entangling threads around the frame made of metal, synthetic resin, etc.

When the solution viscosity of the second component is low or when a large amount of vinyl ester is copolymerized, the drying rate is slow due to good affinity with the solvent, and the temperature dependence is large, resulting in poor film tension.

On the other hand, a copolymer containing a large amount of vinyl chloride is not preferable because it becomes difficult to dissolve and its viscosity becomes high.

Further, a material having a high degree of polymerization is not preferable because the threads are not entangled easily and become fluffy.

Furthermore, the second component polymer is a small amount of maleic acid copolymerized, which contributes to adhesion, and the maleic acid may be anhydrous, anhydrous maleic acid, or a combination thereof. It's okay.

The vinyl esters copolymerized with the vinyl chloride polymer that is a component of the present invention include vinyl acetate, vinyl propionate,
The maleic acid is vinyl versatate, and the maleic acid may be anhydrous or aqueous, or a combination of these may be used.

Among these polymers, the first component can be produced by a conventional suspension polymerization method, and the second component can also be produced by a conventional solution polymerization method or suspension polymerization method.

Next is the ratio of the second component to the first component.
In order to increase the effect without losing the properties of the ingredients, the first ingredient 1
00 parts by weight, 8 to 40 parts by weight, preferably 8 to 2 parts by weight
0 parts by weight is good.

If the second component is less than 8 parts by weight, the adhesive strength of the crosspiece frame will be reduced and no effect can be expected from the addition. If it exceeds 40 parts by weight, the properties of the second precept will be strongly manifested and the affinity with solvents will be strong. , the film that rises becomes dull and cannot achieve its purpose.

A plasticizer used for vinyl chloride, such as dioctyl phthalate, and a stabilizer, such as butyl tin malate, are added to these first and second components, if necessary.

Further, fillers and colorants may be added depending on the case.

However, it is preferable to add plasticizers and fillers to the extent that the above properties are not lost.

These mixed solutions should be kept at a resin content of 15 to 25% by weight to maintain threads of uniform thickness and length during spraying.

When the resin content is less than 15% by weight, the yarn becomes thin and short, and when the resin content exceeds 25% by weight, the viscosity becomes high and it becomes substantially difficult to spray.

Further, the solvent used for this resin solution may be any organic solvent as long as it dissolves the first and second component polymers.
In terms of drying speed, ketones such as acetone and methyl ethyl ketone, and esters such as methyl acetate and ethyl acetate, which have a low boiling point, are preferred.

In order to package objects using the resin composition for stringable paint according to the present invention, first a frame is stretched around the object using adhesive tape, and then the resin composition of the present invention is applied between the tape frames with a spray gun. Spray it on the surface of the room to form a dense web-like fibrous film that wraps around the utensils.

Furthermore, in the case of manufacturing a Japanese paper-like article, a crosspiece frame may be made of wire, wood, etc., and the resin composition may be sprayed with a spray gun while rotating the crosspiece frame as necessary.

This method produces a fiber membrane that has the appearance of Japanese paper and is much stronger than Japanese paper, so it is particularly suitable for manufacturing lighting equipment hats, shoji screens, etc., for which Japanese paper has traditionally been used.

According to the conventional resin composition for string paint, the interval between the frames when packaging utensils or manufacturing articles had to be 20 (1771 or less), but with the resin composition of the present invention, the interval between the frames was can be increased to 70 cIrL or more, and a uniform and strong fibrous membrane can be created.

The embodiments and effects of the present invention will be shown below using Examples and Comparative Examples.

Examples and Comparative Examples A resin solution was made according to the formulations shown in Tables 1 and 2, and was spread at a distance of 1°5m using an airless gun (gun pressure 4kg/iG) onto a wire frame of 70CrIL on one side x 70crfL x 100crn in height. Sprayed from the position.

For spraying, a wire frame was rotated at 6 rpm to entangle the resin from the threads coming out of the gun.

Claims (1)

[Claims] 1 Average degree of polymerization 600-1200. Vinyl chloride 30-7
0% by weight, vinyl ester 70-30% by weight copolymer ioo parts by weight and average degree of polymerization 200-4501 vinyl chloride 87-70% by weight, vinyl ester 1.3-30% by weight
Moreover, compared to this, maleic acid is 1 to 1.
A resin solution for spray paint that forms a fibrous film between frames, which contains 8 to 40 parts by weight of a 3% by weight copolymer and 15 to 25% by weight as a resin content.