JPS58164657A - Paint composition - Google Patents

Abstract

PURPOSE:To provide a paint compsn. which makes it possible to conduct thick- wall coating, exhibits high thermal reflectance, has excellent heat resistance and durability, and is suitable for use in coating roofs, consisting of polybutene, aluminum flake, a hollow filler and a non-asbestos fiber. CONSTITUTION:A main film-forming material component consisting of 100pts.wt. (on a solid basis) polybutene (A) having a number-average MW of 500-50,000, 5-40pts.wt. aluminum flake (B) having a particle size of 1-100mu, 10-100pts.wt. hollow filler (C) having a particle size of 1-200mu such as phenol balloon and 1-70pts.wt. non-asbestos fiber (D) of 0.1-10mm. in length such as polyethylene fiber, and a solvent such as mineral spirit and optionally a plasticizer, aggregate, a rust-inhibiting pigment, etc. are blended together. EFFECT:This compsn. can be thick-coated in a thickness of 100-200mu by one coating, and gives a coating film which can follow change or expansion and contraction of roof cover due to heat so that it is not cracked.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is capable of thick film coating and has improved properties such as heat insulation and durability.
It has excellent IK film performance and is particularly suitable for coating on roofs.

Conventionally, iron plates, galvanized iron plates, etc. were used to make paint for the nine roots [,
Silver paints containing aluminum and asphalt paints containing large amounts of asbestos fibers are known.

However, since the former cannot be coated in a thick film, it suffers from drying out after 7 to 1 year, making it impossible to obtain a durable coating.

In addition, although the latter can be painted in a thick film, the resulting paint film has a blackish, corroded appearance, and has problems in terms of film performance such as high heat absorption and poor insulation properties, as well as the production of asbestos fibers. It has been pointed out that it is dangerous as a cancerous substance, and there were also problems with the working environment.

The present invention solves the above problems and is good in that it can be coated with a thick film and has excellent heat insulation and durability. 11
t&I/A%, regarding large paint compound acid suitable for roofing on legs.

That is, in the present invention, the main coating film forming materials are polybutene (solid content) 700 parts by weight and aluminum flakes 5 to IIQ.
The present invention relates to a coating composition comprising 10 to 100 parts by weight of hollow filler and 7 to 70 parts by weight of non-asbestos fibers.

The coating composition of the present invention can be coated in a thick film with one pore p,
In addition, the formed optical coating follows the thermal expansion, contraction, and deformation of the roofing material, so it does not cause cracks, etc.!It has a high specific heat reflectance, has excellent heat insulation properties, and is durable.In addition, a hollow material is used as a filler. Because of this, the specific gravity of the paint is lighter, and it has good coating workability and has no mildew.

As the polybutene used in the present invention, either hydrogenated or unhydrogenated polybutene can be used, and those having a number average molecular weight of 5oo-so and oθO are suitable. Note that if the number average molecular weight is too low, the viscosity will be low and the adhesiveness will be low. Conversely, if the number average molecular weight is too high, the viscosity will be high, so a large amount of solvent must be used to improve painting workability. In either case, it becomes impossible to achieve the desired thick film coating in one coat, which is not desirable.

However, in conventional asphalt-based paint compositions, aluminum flakes are used to improve heat reflectivity and give the paint film a silver color.However, the asphalt itself is black and has a high heat absorption rate. , A1. Compared to the Sphalud type, the above objective is achieved by just adding a small amount of expensive aluminum flake tubes, so it also has the advantage of lower coating costs.

1 Furthermore, the aluminum flakes used in the present invention have a particle size l~/θOμ, which is commonly used in general paints.
aluminum flakes can be used, but leaf indica type aluminum flakes are particularly preferred.

The above aluminum flakes are coated II K Sil A-
Because it is blended with the purpose of increasing the heat reflectance by 1,00% additive amount & solid content (solid content).
.

3 to IIQ parts by weight are appropriate. In addition,
If the amount added is too small, the above-mentioned effects cannot be expected, and on the other hand, if it is added in excess, the flexibility of the coating film will decrease, which is undesirable.

The hollow filler used in the present invention is a granular material that is completely hollow inside, such as a soap bubble, and the hollow part is completely closed by a shell, or a closed-cell granular material that has partition walls inside, such as pumice. It is. The suitable hollow filler has a particle size of about 1--〇θ and a bulk specific gravity of about θ1 g or less.

The above hollow filler is the E of the phenol balloon.
I4111i balloon: Non-material balloons such as shirasu balloon, water glass balloon, silica balloon, alumina balloon, perlite balloon, fly ash balloon, spinel balloon, zirconia balloon, carbon balloon, etc. can be used. Furthermore, it is preferable to use materials whose surfaces have been treated with a silane coupling agent or a titanium-based coupling agent.

The hollow filler is added to reduce the specific gravity of the coating material, improve coating workability, and improve the heat insulation properties and crack prevention effects of the coating film. The amount added is polybutene (
70 to 100 parts by weight is suitable for 100 parts by weight of wA type. Incidentally, if the amount added is too small, the above-mentioned effects cannot be expected, and on the other hand, if the amount added is too small, the strength and flexibility of the coating film will decrease.

Non-asbestos fibers used in the present invention include synthetic or natural organic fibers such as polyethylene fibers, polypropylene fibers, vinylon fibers, cellulose fibers, and Nokulp fibers; steel fibers, glass fibers, and slag wool. Metallic or inorganic fibers such as rock wool, gypsum fiber, calcium sulfate fiber, silica alumina fiber, and talc fiber can be used.

The length of the above fiber is approximately O8/~IO-,
By adding these fibers, cracks in the paint film can be prevented, and toughness can be imparted to the paint film, increasing paint viscosity.
Improves coating properties and painting workability. For this purpose, the amount of fiber added is 7 to 100 parts by weight of polybutene (solid content).
Appropriate amounts are 70 parts by weight, particularly 1-20 parts by weight for organic fibers, and 0 to 0 parts by weight for metallic or inorganic fibers.

The coating composition of the present invention contains a solvent such as mineral spirit, Sorpe/Tonaphtha, toluene, xylene, and isoparaffinic naphtha; and, if necessary, various polymeric resins and plasticizers; fillers such as calcium carbonate, talc, mica, and silica. , aggregate; zinc chromate, strontium chromate, molybdenum zinc, molybdenum calcium, tungsten zinc, tungsten magnesium, 11
Anticorrosive pigments such as chromate-based, molybdate-based, tungstate-based, phosphate-based, borate-based, etc. such as zinc phosphate, phosphor-plated aluminum, and broiled zinc; zinc powder; thickener;
Antifoaming agents, antioxidants, ultraviolet absorbers, leveling agents,
The coating composition of the present invention, which contains various additives such as dispersants, can be used in conventional coating methods such as spray coating, brush coating, spatula coating, etc.
v t o O-J, ooo JIIl[K thickness**
*Can be done.

The coating composition of the present invention can form a thick film with one coat,
It is especially useful as a layered coating for galvanized iron and other materials due to its excellent heat insulation and durability. It can also be applied to steel structures such as mourning tanks.

Hereinafter, the present invention will be explained in more detail with reference to Examples.

The composition shown in Table 1 (by weight) was uniformly stirred and mixed with a disper, and then the oxtail composition obtained was mixed on a galvanized iron plate (Ox/
! ;0-)K, good after applying 7 coats with a brush to a dry film thickness of 300^. (Comparison? I/ is 300 seconds with 7 coats)
Shikei painted 3 times as a tiger. A performance test was conducted on the coating film obtained by air drying for a week, and the results shown in Table 1 were obtained.

Table 7 Note 1) Product name of “Polybutene 2000 River” manufactured by Ito Kodo Co., Ltd.
Mineral spirit solution with non-volatile content S0; number average molecular weight ko, 3θθ) Note 2) Leafing type aluminum flakes (non-volatile content 1, S) Note 3) Implementation Example 1, 2 and Comparative Example 1. 3 is Nippon Philite Co., Ltd.'s product name "Fillite
3-173~/30μ uses KoO-: Bulk specific gravity 0.4'), and the real 1aN3 is PQ Company product name r Q-
Cal #300J (average particle size Asμ; bulk specific gravity 0.2
/)It was used.

Note 4] Example 1.3 and comparative material used slag wool [Hayashi Kasei Co., Ltd. trade name [varnish fiber FFI],
In Example 1PI12 and Comparative Examples/3, polyethylene fibers [trade name "Chemipest FD3ZA0" manufactured by Mitsui Petrochemical Industries, Ltd.] were used.

Table - Note 3+ Test method: Make a goban cut in the corner.
Cellophane tape peel test evaluation 0:100/100, ○, to to qq/io.

Δ:! θ~”/100, X: 0-4t97.o.

Note 6) Test method: Make a cross cut on the Ik membrane and
O-hour salt spray test evaluation ◎: θ~3■ Blisters occur from the cut part, ○: Blisters occur from q~S points from the cut part, Δ: 6~1 from the cut part
0 Snow blisters occur, ×: Blisters occur more than//- from the cut part, Note? ) Test method: 10 on carbon weatherometer
00 hour exposure test evaluation ○: No abnormality Δ: Discoloration, blistering ×: Cracks Note) As shown in Figure 1, the roof is above ground/! A large corrugated iron machine installed at a height of m (/mX/m
Make a box consisting of drawing side walls 2 and bottom 2' made of veneer 1# (/m
II (total of 3 tons) The lower K11j of JcIII was attached from the tongue roof, and the temperature (ft) was measured outside the layer at a fixed time during the day in the evening. /
Comparing the average temperature during the evening months N/'t- As a standard, ◎, /, S ~ /, 4 degrees 9 degrees Celsius lower, ○, /, 0 ~
/, 4′C lower is Δ, and 0.9°C lower is ×.

It is clear from Table 1 that the coating composition of the present invention has excellent coating film performance.

10,000, those that do not contain hollow filler or those that have a small amount added, such as Comparative Gal To or Comparative Gal 3, have poor insulation properties, and conversely, those that have an excessive amount of hollow filler, such as Comparative Gal To or Comparative Gal 3. In this case, good results were obtained with poor adhesion and weather resistance.

[Brief explanation of the drawing]

FIG. 1 shows a thermal insulation test device. Ilk-covered galvanized iron plate, 2...Plywood board 3...Temperature needle.

Claims (1)

[Claims] V) The main coating film forming material is polybutene (solid content > io. parts by weight, aluminum flakes 5-eo weight ts, hollow filler 10-100 parts by weight, and non-asbestos fibers 1-0 weight parts) A coating composition characterized in that the polybutene has a number average molecular weight of SθO to 3θ, θ
Claim No. (1)X characterized in that θO
J Kei's paint composition. (2) The hollow filler has a particle size of approximately 0.0 μm and a bulk specific gravity of approximately 0.6 g or less. The fibers have a length of approximately 0./~lO
■° The coating composition according to claim (1).