JPS5821458A - Coating compound composition - Google Patents

Abstract

PURPOSE:A coating compound composition having improved roofing properties, capable of being finished by one coating without applying top or under coating, obtained by adding triphenyl phosphite (derivative) to an epoxy resin coating compound composition containing roofing type aluminum pigment. CONSTITUTION:For example, (A) an epoxy resin is blended with (B) 0.5-1.0 equivalent based on the epoxy equivalent of the epoxy resin of a curing agent, (C) 5-100pts.wt. based on 100pts.wt. component A of roofing type aluminum pigment (preferably pasty pigment with its surface treated with stearic acid, etc.), and (D) 1-100pts.wt., preferably 5-25pts.wt. based on 100pts.wt. component A of triphenyl phosphite (derivative), to give the desired composition. EFFECT:Having improved metallic feeling and anticorrosion properties after long- term preservation.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention improves the leafing properties of aluminum pigments,
The present invention also relates to a coating composition that does not particularly require an undercoat or a topcoat and can be finished in -1 coats.

In general, leafing type epoxy resin paints containing aluminum pigments have been used in a wide variety of applications, including steel towers, bridges, tanks, and vehicles. However, with conventional leafing-type epoxy resin paints containing aluminum pigments, it is not always possible to obtain a coating film with satisfactory leafing properties, and therefore a coating film with an aluminum feel is often not obtained, and the weather resistance is also poor. It was something. Also, since it is a resin paint, special care must be taken in treating the metal base, and a high degree of base treatment is usually required, such as by sandblasting or other sillast treatment.

Therefore, rust prevention 1. In consideration of adhesion, etc., a method has generally been used in which an epoxy resin primer is applied and a leafing type epoxy resin paint containing aluminum pigment is applied thereon.

In view of the above-mentioned current situation, the present invention is a leafing-type aluminum pigment-containing paint that improves the adhesion properties of aluminum pigments, can be coated on a wide range of metal-based treated charcoal objects, and is also capable of serving as both an undercoat and a topcoat. The object of the present invention is to provide a 4xy resin coating composition.

These objects are achieved by a leafing-type aluminum pigment-containing polyurethane resin coating composition, which is characterized in that it contains triphenyl phosphite or a derivative thereof.

Conventionally, three-component paints consisting of a base component, a curing agent component, and an aluminum paste component have been used, but the paint composition of the present invention blends tri-7-enyl phosphite or its derivatives. The aluminum paste component can be mixed with the components in advance and stored, and the form of the a-molding paint is also possible, resulting in good painting workability. Furthermore, the resulting coating film has good leafing properties, and a layer of aluminum flakes is formed on the coating surface, resulting in a coating film with good appearance, weather resistance, and rust prevention.

Furthermore, as described above, since the paint according to the present invention has the functions of both an undercoat and a topcoat, it can be used as both an undercoat and a topcoat in one application, and the painting process can be shortened.

The leafing type aluminum pigment-containing Nyxi resin coating composition of the present invention contains an epoxy resin as a main component,
It consists of a hardening agent, a leafing type aluminum pigment, and triphenyl phosphite or its derivatives, and can also be blended with a solvent, rust preventive pigment, extender pigment, and various additives as required.

As the I-oxy resin, ordinary I-oxy resin for paints can be used. For example, bisphenol A type epoxy resin and bisphenol F type edoxy resin can be used. In particular, bisphenol F type epoxy resin has a low viscosity, so the amount of solvent in the paint can be reduced accordingly, making it possible to create a high non-volatile paint, allowing for thick film coating, and also improving the leafing properties of aluminum pigments, making it ideal. Commercially available bisphenol F-type Nixy resins include Epicron φza 30C (manufactured by Dainippon Ink & Chemicals), Ko/Mic*-/
There are lIO (manufactured by Mitsui Petrochemical Industries, Ltd.), etc.

As the curing agent, the usual curing agents for epoxy resins mentioned above can be used. For example, aliphatic tetraamines such as diethylenetriamine and triethylenetetraamine, aromatic triamines such as metaphenylenediamine and diaminodiphenylmethane, and polyamide resins can be used.

The amount of curing agent used is based on the niboxy equivalent of the epoxy resin.
0. An appropriate amount is such that s-/, 0 equivalent.

As the leafing type aluminum pigment, those commonly used in this type of paint can be used, but yeast-like pigments whose surface has been treated with stearic acid or the like are particularly preferred. For example, Altop (manufactured by Tokai Metals Co., Ltd.), Sap (manufactured by Showa Aluminum Co., Ltd.), Alpaste (manufactured by Toyo Aluminum Co., Ltd.), Eternazolite (
Commercially available products such as Silverline Co., Ltd.) and 5tapa (Asahi Kasei Kogyo Co., Ltd.) can be used.

The amount of leafing type aluminum pigment used is usually 5 to 100 parts by weight per 100 parts by weight of the epoxy resin.

Triphenyl phosphite or its derivatives include triphenyl phosphite [p+oc, +5) , ], tricresyl phosphite (p + oc6H4c+, ) s 1
, trixylenyl phosphite [P÷QC, H, (OHs)
2), 1. Trisnonylphenyl phosphite (P + OC
6"aCt"tv)s], the amount of triphenyl phosphite or its derivatives used is 7 to 700 parts by weight, particularly preferably, per 100 parts by weight of the polyoxyresin! -2r11.1 parts is suitable. If the amount of triphenyl phosphite or its derivative used is less than the above range, the above-mentioned effects cannot be expected, and if it is too much, the water resistance of the coating film will be extremely poor, which is not preferred.

In the present invention, by blending the above-mentioned triphenyl phosphite or its derivatives, the aluminum pigment can be made into a paint without losing its leafing properties even after long-term storage, and as required for conventional epoxy resin paints. A coating film with excellent adhesion can be obtained without the need for severe surface treatment.

Solvents that can be used appropriately in the present invention include toluene,
Nonpolar hydrocarbon solvents such as xylene, benzene, naphtha, etc. are suitable. Note that when using polar solvents such as ketone solvents, they may react with aluminum paste, triphenyl phosphite, or their derivatives.
For example, when these are mixed in advance with the base component and stored for a long period of time, the polar solvent needs to be mixed with the curing agent component.

The amount of solvent used is 1 l for 100 parts by weight of synthetic resin.
A suitable value is 0 parts by weight. Incidentally, when a large amount of sulfite/triphenyl acid or its derivative is used within the above range, it is not necessarily necessary to add a solvent.

Furthermore, in the present invention, as described above, antirust pigments and extender pigments can be used as necessary. The amount of these anti-rust pigments and extender pigments is 100 parts of epoxy resin.
[200 parts by weight or less per part is appropriate.

The present invention will be explained in detail below with reference to Examples. In the examples, "part" and "ch" are expressed on a weight basis.

Example/Leafing type aluminum paste face prick (aluminum paste 53-l/9) C Toyo Anno, Mini.

(manufactured by Lamb)) 25ifl・, triphenyl phosphite 10
After pre-kneading 1 part and 1 part of xylene in a dispersion oven, 50 parts of bisphenol R-type epoxy resin (Ebikulo/Sg30 (manufactured by Dainippon Ink and Chemicals)), 5 parts of Xyref and Part S of the anti-sagging agent was mixed and combined in a disk to form a main ingredient.

Separately, modified aromatic polyamine (Sanmide M-/Gθθ
[Manufactured by Sanwa Kagaku Kogyo Co., Ltd.]), 35 parts of calcium carbonate, 23 parts of mica, 5 parts of xylene, 15 parts of methyl isobutyl keto, 9 parts of anti-sagging agent and 7 parts of suspending agent were kneaded in a 41-liter dispersion tube. These were combined to form a curing agent component.

A paint was prepared by mixing the base agent component and the curing agent component in a ratio of (/:/).

Example A paint was prepared in the same manner as in Example except that tricresin phosphite was used in place of triphenyl phosphite.

Example 3 20 parts of leafing type aluminum yeast pigment,
After pre-kneading 10 parts of triphenyl phosphite and the Kijirenda part in a disper, add bisphenol 4 xy resin (Epicote φg 2 g [manufactured by Shell Chemical Co., Ltd.]
), 3 parts of Xyref, and 3 parts of anti-sagging agent were mixed and kneaded using Disc A-1c to obtain a main ingredient.

Separately, 20 parts of Dahlia Kenbiken (Tomai Y: LSS [manufactured by Fuji Kasei Kogyo Co., Ltd.]), 3 parts of calcium carbonate, 10 parts of cuttlefish, 1 part of xylene, 1 part of methyl ethyl ketone, 1 part of anti-sagging agent, and 1 part of anti-settling agent. These parts were kneaded using a disper or - to prepare a curing agent component.

The main component and the curing agent component were mixed in a ratio of (/:/) to prepare a paint.

Comparative Example 1 In Example 1, xylene 10 was used as the solvent in the main component.
A coating material was prepared in the same manner as in Example 1, except that 11 parts of a mixture of xylene and inbutanol was used instead of 1 part, and 10 parts of petroleum resin was used instead of 10 parts of triphenylsulfite.

In Comparative Example and Example Co, triphenyl sulfite IO was used as the main ingredient.
A paint was prepared in the same manner as in Example 1, except that 1 part of a mixture of xylene and isobutanol was used instead of 7 parts of xylene and 7 parts of xylene.

After storing the base ingredients prepared in Example 1, 3, and 3 and Comparative Example 11 for a certain period of time, the paint was mixed with a curing agent component, and this paint was applied to a steel plate with a brush to a dry film thickness of lOθμ,
After natural drying for /week, leafing property was visually judged. The results are shown in Table 1.

In addition, apply the paint prepared in Example/, C, 3 and Comparative Example/, 2 to a sandblasting iron plate (SIS, Sa, 2/A) and a rusted iron plate (Type 2 Keren) with a brush to a dry film thickness of 100μ. After applying it to the room and drying it naturally for 7 weeks, it was cross-cut and subjected to a salt spray test (Cl000 hours) and an outdoor spray test (/year), and the results are shown in Table 2.

Criteria for Judgment ◎←× Good metallic feel No noticeable metallic feel Table Judgment Criteria ◎: No abnormality O: Cross-cut rust 3wm or less ∆” Am or less ×: 1 or more Clear from Tables 1 and 2 As shown, the paint of the present invention had good leafing properties even after long-term storage, provided a coating film with a good metallic feel, and also had excellent rust prevention properties.On the other hand, the paint of the present invention had good leafing properties even after long-term storage, and also had excellent rust prevention properties. Example: After long-term storage, the paint film of Example 1 had a poor metallic feel and was also poor in rust prevention.

Commissioner of the Patent Office Shima 1) Haruki Tono1, Incident Display Showa! 6th year patent application No. 120/1, No. 1 2, Title of the invention: Coating composition 3, Relationship with the case of the person making the amendment: Name of the applicant (332) Dainippon Toyo Co., Ltd. 4, Agent 8, Contents of the amendment 1 Page 6 of the specification, 1 Hiroyuki 1/~1001 as "3~io
o” and correct it.

2. On page 7 of the same library, 1...Resin 1 is corrected to ``...Resir.''

3 Same book, page 1 O/, line 2 and line ij line 1 Example 21 as “
``Example 3''.

Claims (1)

[Scope of Claims] (1! A leafing type nibxi resin coating composition containing an alonium pigment, characterized in that it contains triphenyl phosphite or a derivative thereof. +21 per 100 parts by weight of nibxi resin. 112. The coating composition according to claim 111, which contains 3 to 100 parts by weight of triphenyl phosphite or a derivative thereof.