JPS5883059A - Vibration damper - Google Patents

Abstract

PURPOSE:To provide a vibration damper which has excellent vibration-damping characteristics and can be easily produced, by mixing an inorg. filler with a solid component of waste paint. CONSTITUTION:Waste paint such as paint sludge obtd. when various industrial products such as automobile body, refrigerator, etc. are coated, is composed mainly of a resin such as an alkyd resin, an acrylic resin or an epoxy resin, and contains further pigment, crosslinking agent, solvent, water, etc. 70-250pts.wt. inorg. filler such as talc or siliceous sand and, if necessary, a plasticizer such as di-n-butyl adipate in order to improve processability are blended with 100 pts.wt. solid obtd. from said waste. The titled vibration damper is produced from the resulting blend.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration damping material whose main component is paint waste.

Conventionally, when painting various industrial products in a painting booth,
Not all of the sprayed paint is applied to the paint, and a considerable amount is scattered into the air and is lost. for example,
Car bodies are painted with intermediate and top coats after electrodeposition, but when painted with a spray gun, only about 30 to 60 G adheres to the object to be coated, and the remaining 70-4IO11 G is scattered into the air and is lost. becomes. Even in a rotary atomization type electrostatic coating system with good coating efficiency, approximately one to-xo is a loss.

This lost paint (hereinafter referred to as waste paint) is collected in a water shower, collected in a pool as waste paint, and then periodically taken out and incinerated as paint waste.

However, in the incineration method, the waste paint contains a large amount of water, has poor combustibility, and generates undesirable substances such as formaldehyde, which requires a huge amount of cost.

Under these circumstances, there has been a demand for new technological development regarding the reuse of waste paint.

Conventionally, it has also been proposed to mix waste paint with asphalt and use it effectively as a vehicle body allocation material. However, if waste paint is simply mixed with asphalt to make a heat-fusible seed, that is, a car body allocating material, water and solvents that are contained in the waste paint during heating to heat-fuse it to the car body and cannot be removed by simple dehydration operations are removed. The problem is that non-uniform foaming occurs inside the sheet due to the volatilization of these substances, resulting in a decrease in appearance quality and vibration damping properties, and variations in performance. In order to solve this problem, complicated steps such as dehydration and solvent removal of the waste paint are required before mixing it with asphalt etc., and the cost for this is also enormous.

The present invention was made in view of these problems, and aims to provide a damping material that has excellent vibration damping properties and is easy to manufacture. 10
70-210 parts by weight of an inorganic filler relative to 0 parts by weight;
This material solves the above-mentioned problems as a composition distribution material to which a plasticizer is added to improve workability if necessary.

The waste paint in the present invention refers to unpainted paint generated when painting various industrial products such as automobile bodies, refrigerators, and electric washing machines, collected from the pool, and usually refers to paint slag.

The main components of heat-curing waste paints for industrial use include resins, pigments, crosslinking agents, solvents, and water. In the painting of automobile bodies, there are single-color intermediate coating waste paint, multi-colored top coating waste paint, and nine waste paints that are a combination of the two.

The composition of these waste paints varies slightly depending on the type of paint used, but the resins generally include alkyd resins, polyester resins, acrylic resins, epoxy resins, etc., and the crosslinking agents include: melamine resin,
There are urea-based resins, penzoguanamine-based resins, etc., and pigments include inorganic pigments such as titanium oxide, carbon black, aluminum pigments, and iron oxide, as well as phthalocyanine-based, azo-based, quinacridone-based, indathrene-based, perylene-based, and thioindigo. In addition, organic pigments such as dioxazine, anthraquinone, etc., and solvents such as aromatic hydrocarbons such as toluene and xylene, alcohols such as ethanol, isopropanol, and butanol, and ethyl acetate, butyl acetate, isobutyl acetate, etc. Ester type, acetone, methyl ethyl ketone,
There are ketone solvents such as methyl isobutyl ketone and cyclohexanone, and glycol ether solvents such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, and diethylene glycol monobutyl ether, and they also contain water in various proportions. There is.

An example of waste paint collected from a swimming pool is shown below.

Resin content (including crosslinking agent) 30 weight/pigment content 251 Solvent content 20 l Water 25 I Inorganic fillers include minerals such as talc, kaolin (clay), silica sand, silica stone, diatomaceous earth, sallite, bentonite, and fluorite. minerals and inorganic chemicals such as calcium carbonate and slaked lime.

A plasticizer is generally used to add flexibility, elasticity, processability, etc. to a rigid polymer and adapt it to the purpose of use, and any of these can be used in the present invention. . Typical examples of plasticizers include dimethyl 7-talate, diethyl phthalate F, dibutyl phthalate, dihexyl 7-thaleate, diheptyl phthalate, and di-2 phthalate.
- Ethylhexyl phthalate, di-n-octyl 7-talate, diisooctyl 7-talate, didecyl phthalate, diisodecyl phthalate, 7-talic acid esters with 06-010 mixed higher alcohols, 7-talic acid esters such as butylbenzyl 7-talate, dimethyl isophthalate,
Isophthalic acid esters such as dibutynolein phthalate and di-2-ethylhexyl-reinphthalate, diisodecynoletetrahydrophthalate, di-2-ethylhexynoletetrahydrophthalate, di-n-octyltetrahydroheptalate, dibutyltetrahydrophthalate, etc. tetrahydrophthalic acid esters, di-n-butyl adipate, diisodecyl adipate, dioctyl adipate, etc., azelaic acid esters such as di-isooctyl azelate, di-n-hexyl azelate, dioctyl azelate, Sebatin fine esters such as di-n-butyl senoate, di-2-ethylhexyl sepacate, and dioctinorecenoginate, maleic esters such as di-n-butyl maleate and diethyl maleate, di-n-butyl fumarate, di-2- Fumaric acid esters such as ethylhexyl fumarate, triisooctyl trimellitate, to1-n-hexyl trimellitate, etc., citric acid esters such as triethyl citrate, acetyl triethyl citrate, etc. , itaconic acid esters such as monomethyl itaconate and diethyl itaconate, oleic acid esters such as butyl oleate and tetrahydrofurfuryl oleate, ricinoleic acid esters such as methyl acetyl ricinoleate and glyceryl monoricinolate, n-butyl Stearate, stearic acid esters such as glyceryl monostearate, other fatty acid esters such as diethylene glycol monolaurate, triethylene glycol diperalconate, fatty acid dibasic acid ester, benzenesulfone butyramide, 0- or, Sulfonic acid derivatives such as P-}luenesulfonic acid amide, trimethyl phosphate, tributyl phosphate, tricresyl phosphate, tricylenyl phos 7
ate, phosphoric acid derivatives such as trioctyl phosphate,
Tetra n-octylpyromellitate, trimethylpentanediol monoisoptylate ester, etc., other monoester plasticizers, diethylene glycol dibenzoate, polyethylene glycol benzoate, and other glycol esters, glycerol acetate, glycerol triacetate, etc. glycerin esters,
Paraffin derivatives such as chlorinated paraffin, polymerized plastics such as polyester, polyether, and alkyd resins,
There are epoxidized vegetable oils such as epoxidized soybean oil, etc. All of the oJ gradient agents listed above are useful, but they may be easier to mix with waste paint, etc. , adipate esters, tetrahydrophthalate ester m, }IJ mellitic acid esters,
Preferred are phosphoric acid derivatives and alkyd resin-based polymer QT plasticizers.

Before blending the inorganic filler, the amount is in the range of 70 to 2JO parts by weight based on the solid content or heating residue/00 parts by weight of the waste paint. If it is less than 70 parts, a uniform closed-cell foam will not be formed when heat-sealed to a car body, etc., but non-uniform foaming will result. Moreover, if it exceeds 230 parts by weight, the adhesion to the steel sheet will be significantly impaired. It is blended when it is desired to lower the viscosity of waste paint and reduce the load on manufacturing equipment during the production of Machi Plastic Cutting μ. The blending amount is in the range of 0 to 30 parts by weight based on the solid content of the waste paint/OO11Ik parts.

If the amount exceeds 30 parts, the adhesion to the steel plate will be poor and high temperatures (
≦θ°C or higher), the allocability also deteriorates.

Next, the present invention will be explained in more detail with reference to Examples and Comparative Examples.

Example 1 Waste paint collected from the pool of an automobile military paint booth was
It was dehydrated using an inch (is. 2cvn) J roll, and the heating residue was reduced to 7r%. 73 to the secondary of the internal volume St.
3 parts by weight (/00 parts by weight in terms of solid content) were transferred, and 70 parts by weight of bentonite (trade name: Kunigel VI, manufactured by Kunimine Kogyo Co., Ltd.) was added thereto, and the mixture was stirred and mixed for 1 hour in a temperature range of 30°C to 55°C. Thereafter, it was processed into a sheet with a thickness of 8 mm using a 6-inch calendar roll.

The formulation is shown in Table 1.

Next, remove O3x7 oxisog mild steel plate (SPCC) and paint it (Nomawartop UJ manufactured by Nippon Paint).
L/7. This sheet} (/j Also,/. Mild steel plate related to OX/OX260 (SP
/JX
Place a sheet of 20 iris on /OX and bake and fuse it for 3θ minutes at IO''C, obtain a co-photographic curve using the cantilever co-element method,
Furthermore, the loss coefficient (η) of the composite plate was determined from the half width normal force.

The results are shown in Table 2.

Example 2 Instead of the inorganic filler bentonite used in Example 1,
Calcium carbonate (Nitto Funka Kogyo Co., Ltd. Product name: NSna 20)
A test piece was prepared in the same manner as in Example 1 by adding /60 parts by weight of 0). The formulation is shown in Table IK, and the test results are shown in Table 2.

Example 3 In place of bentonite, the inorganic filler used in Example 1, fluorite was added in 2sO & dense parts. A test piece was prepared using the same procedure as IJl and Ichimachi. The formulations are shown in Table 1 and the test results are shown in Table 2.

Example 4 In place of the inorganic filler bentonite used in Example 1, 70 parts by weight of perlite (Ube Industries) was added, and 0 parts by weight of g-n-butyl adipate was added as a plasticizer.
A test piece was prepared in the same manner as in Example 1. Table 1 shows the composition.
The test results are shown in Table 2.

Example 5 The same procedure as in Example 1 was carried out except that 70 parts by weight of silica sand (Kawatetsu Mining Co., Ltd.) was added in place of bentonite as the inorganic filler used in Example 1, and 30 parts by weight of di-n-octyl 7-talate was added as a plasticizer. A test piece was prepared using the same procedure. The composition is shown in Table 1.
The test results are shown in Table 2.

Example 6 In place of bentonite, the inorganic filler used in Example 1, 60 parts by weight of talc (Kunimine Kogyo (trade name: GTA)) was added, and lθ parts of dimethyliso7thalet were added as a plasticizer. A test piece was prepared in the same manner as in Example 1. The formulation is shown in Table 1, and the test results are shown in Table 2.

Example 7 Instead of the inorganic filler bentonite used in Example 1,
Talc (Kunimine Kogyo Co., Ltd. product name GI'A) /60
In addition to the M'tk part, an alkyd resin polymer (Hitachi Chemical Co., Ltd.) Phthalkyd 280 was added as a plasticizer.
-100) was added thereto, and a test piece was prepared in the same manner as in Example 1. The formulation is shown in Table 1, and the test results are shown in Table 2K.

Example 8 Instead of bentonite as the non-containing filler used in Example 1,
Karion (Kunimine Kogyo Co., Ltd. product name: Kunimine Clay)
of. 2so weight part Ue, and as a town plastic agent, Toryn
- 10 times hexyl trimellitate itffB7JI]
A test ribbon piece was prepared in the same manner as in Example 1. The formulation is shown in Table 1, and the test results are shown in Table 2.

Example 9: Added 230 parts of slaked lime instead of bentonite, the mineral-free filler used in Example 1, and added 30 am parts of OT plasticizer, shite, and tricresyl phosphate, and the same as Example 1. A test piece was prepared using the same procedure. The formulation is shown in Table 1, and the test results are shown in Table 2.

Comparative Example 1 In place of the inorganic filler bentonite used in Example 1, Karion (Kunimine Kogyo TW) Product Name: Kunimine Lu was added to 6
A test piece was prepared in the same manner as in Example 1 by adding 0 parts by weight. The formulation is shown in Table 1, and the test results are shown in Table 2.

Comparative Example 2 Instead of the inorganic filler bentonite used in Example 1,
A test piece was prepared in the same manner as in Example 1 by adding % parts by weight of silica sand (Kawatetsu Mining Co., Ltd.). The formulation is shown in Table 1, and the test results are shown in Table 2.

Comparative Example 3 A test piece was prepared in the same manner as in Example 1 except that 270 parts by weight of the inorganic filler bentonite used in Example 1 was added. The formulation is shown in Table 1, and the test results are shown in Table 2.

Comparative Example A test piece was prepared in the same manner as in Example 1 except that 300 layers of Barley 1 (manufactured by Ube Industries, Ltd.) was added in place of bentonite, the inorganic filler used in the comparative example.

The formulation is shown in Table 1, and the test results are shown in Table 2.

Comparative Example 5 Calcium carbonate (product name: NSna40 manufactured by Hizuka Hanka Kogyo Co., Ltd.) was used instead of bentonite as the inorganic filler used in Example 1.
0) was added to ioo modified part, and further as a plasticizer, Gene
- ψ parts by weight of octyl phthalate were added, and a test piece was prepared in the same manner as in Example 1.

The formulation is shown in Table 1, and the test results are shown in Table 2.

Comparative Example 6 In place of the bentonite inorganic filler used in Example 1, 710 parts by weight of slaked lime was added, dimethyl isophthalate was added as a plasticizer, and f:. A test piece was prepared. The formulation is shown in Table 1, and the test results are shown in Table 2.

Comparative Example 7 In place of bentonite, the inorganic filler used in Example 1, 230 parts by weight of talc (product name OTA, manufactured by Kunimine Industries Co., Ltd.) was added, and as an 0T plasticizer, ψ heavy part of di-n-butyl adipate was added. 〃Test specimens were prepared in the same manner as in Example 1. The formulation is shown in Table 1, and the test results are shown in Table 2.

Comparative Example 8 O3x'y was coated with an asphalt sheet (manufactured by Nippon Tokushu Toyo Co., Ltd., trade name: Melsheet), which is currently widely used as an allocating material for automobiles, in the same manner as in Example 1.
This Melsheet (
/． IX! OX/20IIm) was placed and baked and fused at /110°C for 30 minutes, and an adhesion test was conducted.

Comparative Example 9 The same composition as in Example 6 was stirred and mixed in the same manner, and then the sample was further transferred to a vertical kneader that can reduce the pressure, and the sample was stirred and mixed under a low pressure of 3 Hg in the temperature range of CNso'c. By stirring for a long time, dehydration and solvent removal are ensured.
After baking for 30 minutes, a sample was obtained that did not foam at all. This sample was processed into a test piece in the same manner as in Example 6. The formulation is shown in Table 1, and the trial results are shown in Table 2.

Similarly to Example 1, 80X/OX260M mild steel plate (
SPCC) was coated and Melcito (/JX/
OX220all) and /QO. ``30 minutes at C.
: Is it baked and fused? Similar to lJl, loss coefficient (η)
Table 2 shows the results.

As is clear from Examples 1 to 9 and Comparative Examples 1 to 9, the solid content of paint waste and the inorganic filler 70-JjO
The heavy duty section is made up of town plastics that are added vertically depending on the need.
It is clear that the flea control material composition having a uniform closed-cell foam has superior distributing properties compared to current distributing materials.

In addition, when Comparative Example 9 is compared with the present invention, it is thought that the present invention has a thicker thickness due to foaming for the same weight, so that the rigidity increases and the geometrical control effect is exhibited. Also, Comparative Example 9
simplifies the manufacturing process because it reliably removes solvents and water from waste paint.

Claims (1)

[Scope of Claims] A vibration damping material characterized in that 70-2jO parts by weight of an inorganic filler is mixed with the solid content/00 parts by weight of L paint waste. 2. The vibration damping material according to claim 1, wherein the paint waste is a heat-cured paint consisting of alkyd resin, acrylic resin, epoxy resin, etc. alone or in combination.