JPH0913004A - Solidifying agent for solvent-based coating material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an agent which can quickly solidify a solvent-based coating material even when added thereto in a small amount and, is therefore useful in e.g. the disposal of a waste coating material by using an organometal alkoxide, a chelate compound or a coupling agent. SOLUTION: At least one compound selected from among organometal alkoxides (e.g. titanium alkoxide), chelate compounds (e.g. aluminum chelate) and coupling compounds (e.g. silicone coupling agent) is used as a solidifying agent for a solvent-based coating material (e.g. alkyd resin coating material). These compounds react with the carboxyl, hydroxyl or like groups of a solvent- based coating material and therefore have a function of effecting its thickening and gelation. It is also possible to produce a solidifying agent for a solvent-based coating material by using a polyisocyanate resin (e.g. hexamethylene diisocyanate) as the principal component. The polyisocyanate resin has a property of reacting the hydroxyl groups of the solvent-based coating material and solidifying it. Waste solvent-based coating materials are solidified by using these solidifying agents, and the solidified coating materials are disposed of.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solidifying agent for solvent-based paints, and more particularly to a solidifying agent suitable for solidifying and discarding unnecessary solvent-based paints.

[0002]

2. Description of the Related Art Solvent-based paints, unlike water-based paints, can hardly be solidified by cement, calcium oxide and magnesium oxide. Two-component urethane resin coatings, epoxy resin coatings, polyester resin coatings, etc., become solid after a few hours have passed after the base and curing agent have been mixed, but one-component thermoplastic resin alkyd resin coatings, Acrylic resin paints, acrylic alkyd resin paints, vinyl chloride resin paints, chlorinated rubber resin paints, etc. could not be solidified unless the solvent was completely evaporated.

On the other hand, as the waste oil treatment technology, synthetic fibers, means for adsorbing waste oil to natural fibers, glyceride of higher fatty acid, polyethylene, paraffin wax, etc. are added to the waste oil, and then heat and 60 ° C. or more are applied to melt and cool. A means for solidifying by doing is known. The means for adsorbing to the fiber cannot adsorb a large amount of the discarded paint. Since the means for applying heat heats to a temperature above the flash point of the solvent contained in the solvent-based paint, there is a risk of ignition. If you discard the solvent-based paint as it is, it may cause fire, soil pollution, and air pollution.If you dispose of it, leave it to a specialized waste disposal contractor and either burn the solvent-based paint or dispose of the solvent. It has been removed, dried and solidified, and discarded.

[0004]

However, in the natural state, it takes a long time to evaporate the solvent in the solvent-based paint, and the evaporated hydrocarbon component hydrocarbons diffuse into the atmosphere and photochemically react. There is an inconvenience that causes air pollution such as smog. In addition, a considerable amount of labor is required even when a specialized waste disposal company separates solid materials such as solvent and resin / pigment. Therefore, an object of the present invention is to provide a solidifying agent which can solidify a solvent-based paint early even by adding a small amount.

[0005]

In order to solve the above-mentioned problems, the invention of claim 1 provides an organometallic alkoxide (usually also called an alcoholate) or a chelate (a chelate).
Compound) or a coupling compound.

In order to solve the above-mentioned problems, the invention of claim 2 is characterized in that a polyisocyanate resin is mainly used.

In order to solve the above-mentioned problems, the invention of claim 3 comprises 100 parts by weight of the solidifying agent of claim 2 (hereinafter abbreviated as "part") and 1 to 50 parts of water-based paint. It is characterized by

In order to solve the above-mentioned problems, the invention of claim 4 is characterized by containing 1 to 99 parts of a polyisocyanate resin and 1 to 99 parts of a polyol resin.

In order to solve the above-mentioned problems, the invention of claim 5 comprises 100 parts of the solidifying agent of claim 4 and 1 to 50 parts of at least one kind of water and water-based paint. And

Solvent-based paints are alkyd resin paints (synthetic resin mixed paints), acrylic resin paints, acrylic alkyd resin paints, chlorinated rubber paints, vinyl chloride resin paints, epoxy ester resin paints, one-component urethane resin paints, phenols. Includes resin paints and oil paints. The organometallic alkoxide, the chelate, and the coupling compound in the first aspect refer to complex compounds and the like. That is, they are metal compounds such as titanium acylate, titanium alkoxide, titanium chelate, titanium coupling agent, aluminum alkoxide, aluminum chelate, and silicon coupling agent, and these are carboxylic acids in solvent-based paints and acids such as hydroxyl groups. Reacts with the base and thickens and gels. The amount of these used for the solvent-based paint can be appropriately determined by a preliminary test.

The polyisocyanate resin according to claim 2 means MDI (phenylmethane diisocyanate) and prepolymer, and XDI (xylylene diisocyanate).
And prepolymer, hexamethylene diisocyanate, etc., which are less likely to become vapor and are safe and easy to handle. In addition, TDI (tolylene diisocyanate) and its prepolymer are liable to become vapors and are specified as dangerous chemical substances. As the polyisocyanate resin used in the present invention, it is desirable to use a resin which does not easily become vapor and which is less dangerous to the operator and is easy to handle.

The polyisocyanate resin means a resin containing 10% or more and 30% or less of isocyanate which is a reactive group. The polyisocyanate resin is used in an amount of 1 part or more and 50 parts or less with respect to 100 parts of the solvent-based paint. When the amount is 1 part or less, the reactivity with the solvent-based paint is low, and when the amount is 50 parts or more, the price becomes high, and it is advantageous to entrust a waste treatment company. Polyol resin used together with polyisocyanate resin is a resin containing a crosslinkable hydroxyl group in the resin such as acrylic polyol, polyether polyol, polyester polyol, alkyd polyol and epoxy polyol. Is. Polio used in the present invention
The resin has a high reactivity with the polyisocyanate resin, and a resin having a curing time of 60 minutes or less is preferable.

The water-based coating material includes water-based coating material using an emulsion obtained by copolymerizing acrylic, acrylic styrene, vinyl acetate, vinyl chloride resin, etc., alone or in a plurality thereof, or water-based coating material containing water. In the present invention, a water-based paint as a residual material can be used and is used to accelerate the crosslinking of the polyisocyanate resin. As an effect of adding an aqueous paint such as an emulsion paint, it is used for the purpose of increasing the crosslinkability of the polyisocyanate resin. If the amount is 1 part or less, the amount is insufficient and the crosslinkability is low. If the amount is 50 parts or more, the polyisocyanate resin or the like is insufficiently crosslinked, water is separated, and solidification is delayed. In each of the first to fifth aspects of the invention, a color pigment such as zinc white and an extender pigment such as calcium carbonate can be added in an amount of 30 parts or less.
The addition amount of the solidifying material of the present invention to the coating material is preferably 1% or more. When it is less than 1%, it takes time to solidify, and it may be considered that the paint does not solidify.

The solidifying agent of claims 1 and 2 can be made into a product by packing the main component of the solidifying agent into a container of a unit of use. The solidifying agent of claim 4 can be made into a product by putting predetermined amounts of the predetermined two components in separate containers and setting them as one set. The solidifying agent of the third aspect can be made into a form that can be easily handled at the site of use by dividing a predetermined amount of the polyisocyanate resin and the water-based paint into a container and putting them in one set. The solidifying agent according to claim 5 is polyisocyanate.
The resin resin, the polyol resin, and any one of water, water-based paint, and emulsion paint are put in separate containers and put in separate containers, so that one set can be easily handled at the site of use. Can be The above-mentioned products of the respective solidifying agents are easy to use, and when they are not used directly, it is desirable that they are in a sealed form in order to maintain reactivity.

[0015]

The main action in each claim is as follows. In the first aspect, the organic metal alkoxide, the chelate, or the coupling compound reacts with the components of the solvent-based paint to solidify the solvent-based paint. In the second aspect, the polyisocyanate resin reacts with the hydroxyl groups of the solvent-based paint to solidify the solvent-based paint. In the third aspect, the polyisocyanate resin reacts with the water content of the water-based paint or the hydroxyl group of the solvent-based paint to solidify the solvent-based paint. In claim 4, polyisocyanate
When the resin reacts with the polyol resin, the solvent-based paint is incorporated and solidified. In the fifth aspect, the polyisocyanate resin reacts with the polyol resin, water, water of the water-based paint, water of the emulsion paint, and hydroxyl groups of the solvent-based paint to solidify the solvent-based paint.

[0016]

EXAMPLES Next, examples of the present invention will be described. Example 1 is a solidifying agent made of an organometallic alkoxide, Examples 2 and 3 are solidifying agents made of chelate, and Example 4 is a solidifying agent made of a coupling compound. Each of these Examples is a single component. Consists of. Examples 1 to 4 correspond to the invention of claim 1.

The alkoxide used in Example 1 was "Aluminum alcohol ASBD" manufactured by Kawaken Fine Chemical Co., Ltd., and the chelate used in Example 2 was "Aluminum manufactured by Kawaken Fine Chemical Co., Ltd.""ChelateALCH" and the chelate of Example 3 are the product names "Titanium chelate KR-41B" manufactured by Ajinomoto Co., Inc., which are used alone, and the coupling compound is a product manufactured by Ajinomoto Co., Inc. The name "Plenact KR TTS" was used.

On the other hand, as Comparative Example 1, a commercially available fiber oil absorbing material, "Kapok Fiber Kakui Oil Catcher" manufactured by Kakui Co., Ltd. is prepared, and Comparative Example 2 is a commercially available oil solidifying agent. "Temple" manufactured by Johnson Co., Ltd. was prepared.

Each of Examples 1 to 4 and Comparative Examples 1 and 2 was added to a solvent-based paint and mixed to carry out a solidification test. Solvent-based paints for the solidification test were Ruffton Acryenamel as acrylic resin paint, acrylic vane as acrylic alkyd resin paint, and Escort hoat as synthetic resin compounding paint.
DX was used. Rafton Acrynamel, Acrylic Burn, and Escort Hop DX are all commercial products manufactured by Suzuka Fine Co., Ltd.

For each 1 kg of solvent-based paint, room temperature is 20 ° C.
In any of the solidifying agents of Examples 1 to 4, 10 g (corresponding to 1% as an outer percentage of the paint), 30 g (equivalent to 3% as an outer percentage of the paint), 50 g (as an outer percentage of the paint) 5%) and added and mixed. Next, the coating material mixed with the solidifying agent was left in an atmosphere (hereinafter, referred to as a predetermined atmosphere) having a temperature of 20 ° C. and a humidity of 70% RH, and the solidifying time and the solidified state were examined. The determination of the solidification time was based on the time when the solvent-based paint became solid and the paint components could not be touched when touched. Practical confirmation of the solidification time was judged within a limit of 96 hours, and those which could not be solidified within 96 hours were judged to be defective and the evaluation was marked x. The solidification tests of Comparative Examples 1 and 2 were used for each solvent-based paint according to the instruction for use. The results of the solidification tests of Examples 1 to 4 and Comparative Examples 1 and 2 are shown in Table 1.

[0021]

[Table 1] (In Table 1, each numerical unit in the first to fourth columns of the present example is time. The same applies to the following table of results of each solidification test.)

As is clear from Table 1, all of the solidifying agents of Examples 1 to 4 were able to solidify the solvent-based paint within 96 hours, but Comparative Examples 1 and 2 could not. The properties of the solidified products of Examples 1 to 4 were approximately as follows regardless of the solvent-based paint used in this example. Example 1
It became a small granular form. Example 2 and Example 3 and Example 4
The result was soft and large granules.

Examples 5 and 6 are polyisocyanates.
It is a solidifying agent consisting of a single component of resin and corresponds to the invention of claim 2. Polyisocyanate of Example 5
The resin used is MDI type "Coronet 2067" manufactured by Nippon Polyurethane Co., Ltd., and the polyisocyanate resin of Example 6 is manufactured by Nippon Polyurethane Co., Ltd.
MDI system "Coronet HX" was used. In Example 5 and Example 6, solidification tests were carried out by adding them to solvent-based paints (Rafton Acryenamel, acrylic burn, Escort Hop DX).

For each 1 kg of solvent-based paint, 100 g (corresponding to 10% as an outer percentage of the paint) of the solidifying agent of Examples 5 and 6 and 300 g (30% as an outer percentage of the paint) Equivalent to) and mixed. The coating material mixed with the solidifying agent was left in a predetermined atmosphere to examine the solidifying time and the solidified state. The solidification time was determined in the same manner as in the above-described examples, and those that did not solidify within 96 hours were defective (x
Mark). The results of the solidification tests of Examples 5 and 6 are shown in Table 2.

[0025]

[Table 2]

As is clear from Table 2, 96% of acrylic burn (acrylic alkyd resin paint) and Escort Hop DX (synthetic resin blend paint) were added at 10% of the solidifying agent of Examples 5 and 6. It was possible to solidify within the time, but Rafton Acryenamel (acrylic resin paint) could not be solidified. 30% of the solidifying agent of Examples 5 and 6
In terms of the amount added, Rafton acryl enamel, acrylic burn and Escort Hop DX could be solidified within 96 hours. The properties of the solidified products of Examples 5 and 6 were both granular.

Examples 7 and 8 are solidifying agents comprising two components, a polyisocyanate resin and an emulsion paint, and correspond to the invention of claim 3. The polyisocyanate resin is the above-mentioned MDI-based "Coronet 2067" and the above-mentioned HMDI-based "Coroneto HX", and the emulsion paint is trade name "AEP6" manufactured by Suzuka Fine Co., Ltd.
000 ”was used. Each solidifying agent 2 of Example 7 and Example 8
The components are in the proportions shown in Table 3.

[0028]

[Table 3] (The compounding amount unit in Table 3 is part.)

Then, using the solidifying agents of Examples 7 and 8,
Solvent-based paint (Rafton Acryenamel, acrylic bar
, Escort Hop DX). For each 1 kg of solvent-based paint, 100 g of either one of the solidifying agents of Examples 7 and 8 (10% as an outer percentage of the paint)
Equivalent to), 300g (30% as an external percentage of the paint)
Equivalent to) and mixed. The coating material mixed with the solidifying agent was left in a predetermined atmosphere to examine the solidifying time and the solidified state.
The determination of the solidification time is the same as in the case of the above-mentioned embodiment, and 9
Those that did not solidify within 6 hours were regarded as defective (x mark). The results of the solidification tests of Examples 7 and 8 are shown in Table 4.

[0030]

[Table 4]

As is clear from Table 4, the solidifying agents of Examples 7 and 8 were able to solidify the solvent-based paint within 0.3 hours. The properties of the solidified products of Examples 7 and 8 were both granular.

The solidifying agents of Examples 9 and 10 are composed of two components, a polyol resin and a polyisocyanate resin, and correspond to the invention of claim 4. As the polyol resin, the trade name "Acryt 6XC-006" of acrylic polyol resin manufactured by Taisei Kako Co., Ltd. and the trade name "ADEKA RESIN EP6075" of epoxy polyol resin manufactured by Asahi Denka Co., Ltd. were used. , The polyisocyanate resin is MDI manufactured by Nippon Polyurethane Co., Ltd.
The system "Coronet 2067" was used. The proportions of the two solidifying agent components of Example 9 and Example 10 were set as shown in Table 5.

[0033]

[Table 5] (The compounding unit in Table 5 is part.)

In Examples 9 and 10, the solidification test was carried out by adding to Rafton Acryenamel (solvent-based paint). For each 1 kg of solvent-based paint, 100 g of either Example 9 or Example 10 (10% as an outer percentage of the paint),
300 g (30% as an outer percentage of the paint) was added and mixed. The coating material mixed with the solidifying agent was left in a predetermined atmosphere to examine the solidifying time and the solidified state. The determination of the solidification time was the same as described above, and those that could not be solidified within 96 hours were regarded as defective (marked with X). The results of the solidification tests of Examples 9 and 10 are shown in Table 6.

[0035]

[Table 6]

As is clear from Table 6, all of the solidifying agents of Examples 9 and 10 were able to solidify the Rafton acryl enamel (acrylic resin paint) within 7 hours. The properties of the solidified products of Examples 9 and 10 were all granular.

Examples 11, 12, 13, and 14 are solidifying agents consisting of three components, a polyisocyanate resin, a polyol, and an emulsion paint or water. Corresponding to.

The polyisocyanate resin is MDI type "Coronet 2067", and the polyol resin is "Acryt 6XC-006" and "Adeka Resin EP6075".
The emulsion paint used was "AEP6000". The ratios of the three components of each solidifying agent of Examples 11 to 14 are shown in Table 7.

[0039]

[Table 7] (The unit of the compounding amount in Table 7 is part.) A solidification test of a solvent-based paint (Rafton Acrynamel) was conducted using the solidifying agents of the present Examples 11 to 14.

For each 1 kg of solvent-based paint, this Example 11
Or, 100 g (corresponding to 10% of the outer percentage of the paint) or 300 g (corresponding to 30% of the outer percentage of the paint) of any of the solidifying agents of Example 14 was added and mixed. The coating material mixed with the solidifying agent was left in a predetermined atmosphere to examine the solidifying time and the solidified state. The determination of the solidification time was made in the same manner as in each of the above-mentioned Examples, and those which did not solidify within 96 hours were regarded as defective (marked with X). The results of the solidification tests of Examples 11 to 14 are shown in Table 8.

[0041]

[Table 8]

As shown in Table 9, all of the solidifying agents of Examples 11 to 14 were able to solidify Rafton Acryenamel (solvent-based paint) within 6 hours. The properties of the solidified products of Examples 11 to 14 were all granular.

[0043]

According to the first to fifth aspects of the present invention,
Compared to conventional oil absorbing agents, for solvent-based paints, for example, 1 to 3
With a small addition amount of 0%, it is possible to solidify the solvent-based paint early, for example, within 96 hours. Therefore, the use of the solidifying agent of the present invention is convenient when the excess solvent-based paint after use or the unnecessary solvent-based paint is discarded as a solidified product. By adding a small amount of each of the solidifying agents of claims 1 to 5 to the solvent-based paint, the solvent-based paint can be solidified into powder or granules, and the solidified product is treated as industrial waste or waste plastic. can do. In addition, claim 3 or claim 5
According to the invention of (1), since the water-based paint can be used as a solidifying component, the unnecessary water-based paint can be solidified together with the solvent-based paint in a short time, which is convenient.

Claims (5)

[Claims] 1. A solidifying agent for a solvent-based coating material, which comprises any one or a plurality of organometallic alkoxides, chelates or coupling compounds. 2. A solidifying agent for a solvent-based paint, which is mainly composed of a polyisocyanate resin. 3. 100 parts by weight of the solidifying agent according to claim 2,
A solidifying agent for a solvent-based paint, comprising 1 to 50 parts by weight of a water-based paint. 4. A solidifying agent for a solvent-based paint, comprising 1 to 99 parts by weight of a polyisocyanate resin and 1 to 99 parts by weight of a polyol resin. 5. 100 parts by weight of the solidifying agent according to claim 4,
A solidifying agent for a solvent-based paint, comprising 1 to 50 parts by weight of water and at least one kind of water-based paint.