JPS6060165A - paint composition - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention improves the leafing properties of aluminum pigments,
The present invention also relates to a urethane resin coating composition that does not require F coating or topcoat K'RT and can be finished with -2 coatings.

Incidentally, leafing-type aluminum pigment-containing epoxy 11γ1-based paints are used in a wide variety of applications, such as painting steel towers, bridges, tanks, vehicles, etc. However, leafing-type aluminum pigment-containing urethane resin paints are not always satisfactory. It is difficult to obtain a paint film with good leafing properties, so a paint film with an aluminum feel is often not obtained, and compared to epoxy resin paints, it has poor water resistance and
It has not yet been widely applied due to its poor anti-rust properties including moisture resistance.

In view of the above-mentioned current situation, the present invention has been developed to improve the adhesion and rust prevention properties of aluminum pigments, and to develop a leafing type paint that can be coated on a wide range of metal substrates and has both an undercoat and a topcoat. The object of the present invention is to provide an aluminum pigment-containing urethane tsukuda paint composition.

For such a purpose, in the aluminum resin coating composition of the aluminum type, the general formula %) This is achieved by a coating composition characterized by containing a trithioalcohol phosphate compound or a derivative thereof.

Conventionally, urethane resin paints containing aluminum pigments were made using polyol resin as the main component. Previously, it was used in the form of a three-component paint consisting of a curing agent component of linocyanate and an aluminum paste component, but with the paint composition of the present invention, aluminum Paste components can be mixed and stored, and a two-component paint form is also possible, which improves the workability of pouring. F again? The applied coating film has good leafing properties, and a layer of aluminum flakes is formed on the surface of the coating, resulting in a coating film with a good appearance and excellent weather resistance and rust prevention properties.

Furthermore, as described above, since the paint according to the present invention has the function of serving as 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 urethane resin coating composition of the present invention contains a polyol resin as a main component, and a polyol resin as a main component. It is composed of a reinocyanate curing agent, the aluminum pigment of leafing tights, and a phosphite trithioalcohol compound or its derivatives, and further contains a solvent, a rust-preventing pigment, an extender pigment, and various additives as required.

As the polyol resin, any polyol resin used in normal two-component urethane resin paints can be used, but when applied to areas where rust prevention is particularly required, epoxy resins and preester resins can be used. Resins are preferred.

Specifically, the commercially available epoxy resin is Epicoat +
1009, Yo/θθri, Ih/θθ/ (Yuka Cielue? Manufactured by Kishi Co., Ltd.), EPX-Otsu 07S (manufactured by Jige Ka Kogyo Co., Ltd.), etc. Also, as polyester resins, commercially available Desmop
henRD-1g, Otsu θ0, Kθθ, //ri0, /, 2
0θ, /7θθ (the above is a shoutout from Bayer), Parnock D
-10 (manufactured by Dainippon Ink Chemical Industry Co., Ltd.) are representative examples. Also, these labor months? d in resin? A modified engineering product in which a part of the xyl group is reacted with a phosphorus r./2 element such as phosphoric acid, an ester thereof, or a salt thereof, which has at least one P-OH group in the molecule. Since the oil further improves the rust prevention property due to its Ginto reaction, such change 1/l:, , x
, 1? Preferably, Kin resin is used.

In addition, for the hydroxyl value of polyol 4VJ resin, θ~/l θ,
Particularly preferably, the range is 10θ to 10θ. If the hydroxyl value is less than the above range, the crosslinking density will be low and the coating performance of the rust-preventing coating will be reduced.On the other hand, if it is larger than the above range, the crosslinking density will be high, resulting in high internal stress and poor adhesion. Both are unfavorable since they tend to decrease.

Examples of the polyisocyanate curing agent include tolylene diisocyanate, nophenylmethane isocyanate, tetramethylene diisocyanate, hexamethenone diisocyanate, xylylene diisocyanate, and j? Examples include rimenalene polyphenylisocyanate, polymers of these incyanates, reaction products of these isocyanates and low molecular weight hyperactive hydrogen compounds, and the like.

For specific song numbers, select commercially available [hsmod
-ur LX [kqsmoclur N (Bayer), Coronate L1 Coronate HL (Japan)
j? Typical examples include LDI-#7θ (manufactured by ViJa Hakko Kogyo Co., Ltd.) manufactured by Takeda Pharmaceutical Co., Ltd. and the like.

The amount of polyisocyanate used is such that the isocyanate group is O0j to d per equivalent I6 based on the hydroxyl group/equivalent of the preol resin.
, preferably approximately/equivalent.

As the lean ingestive aluminum pigment, any 2'L pigment that is commonly used in this type of paint can be used, but paste-like pigments that have been surface-treated with stearic acid or the like are particularly preferred. For example, Aldono 7'' (manufactured by Tokai Kinzoku Co., Ltd.), Aluminum Paste 3ap (manufactured by Showa Aluminum Powder Co., Ltd.), Alpaste (manufactured by Toyo Aluminum Co., Ltd.), Eterna Prite (manufactured by Silver Line Co., Ltd.), 5tapa
(manufactured by Asahi Kasei Kogyo Co., Ltd.) and other commercially available products can be used.

The amount of aluminum pigment used in leafing tights is usually 5 to 700 M parts per 700 parts by weight of the polyol resin.

In the present invention, as the phosphite trithioalcohol compound, a compound having the general formula % or a mixture thereof can be used.

In addition, in the above general formula, the n value? 'ig-λ is an integer. Compounds with an n value of less than g are unstable and easily decomposed, and conversely, compounds with an n value of more than 26 have poor compatibility with other components, and both are unfavorable.

In addition, as a derivative of the Inosun σ2 trithioalcohol compound, seven of the linear saturated thioalcohols or mono-, di- or tri-unsaturated orodeoalcohol groups in the above general formula can be substituted with phenol, thiophenol or its derivatives. ,
For example, those substituted with alkylphenol or alkylthiophenol can be used. These phosphite trithioalcohol compounds and their derivatives are known compounds per se and can be easily obtained.

The amount of the trithioalcohol phosphoric acid compound or its derivative used is 3 to 3 to 100% for the polyol resin/θoH sliding part.
100 parts by weight, particularly preferably 3-2I, is suitable. If the amount of the phosphite trithioalcohol compound or its derivative used is less than the above range, the above-mentioned effects cannot be expected, and on the other hand, if it is too much, the water resistance of the coating film will be extremely poor, which is not preferable. .

In the present invention, by blending the above-mentioned phosphorous acid trithioalcohol compound or its derivative, the aluminum pigment is made into a paint and does not lose its leafing properties even after long-term storage, which is required for conventional urethane resin paints. A coating film with excellent adhesion and resistance to political deterioration can be obtained without the need for such severe surface treatment.

Solvents that can be used appropriately in the present invention include toluene,
Hydrocarbon solvents such as nonpolar solvents such as xylene, benzene, and naphtha, or ester solvents such as ethyl acetate are suitable.

The amount of solvent used is based on the polyol resin/θOM sliding part.
/θ~70 heavy-ground area is appropriate. However, when using a phosphorous acid trithioalcohol compound or its derivative at a high Ki within the above range, it is not necessarily necessary to add a solvent.

Further, in the present invention, as described above, anti-rust pigments and extender pigments can be used as necessary. 1 inch of use of these anti-rust pigments and extender pigments is j? l) All resin 70
A suitable amount is 200 parts by weight or less compared to 0 parts by weight.

The present invention will be explained in detail below using examples. In the examples, "parts" and "%" are expressed on a weight basis.

Example / Leafic Taishi aluminum R-st pigment (aluminum paste! 3-//9) C manufactured by Toyo Aluminum Co., Ltd.]) λ
Left part, after pre-kneading trithiotrilauryl asulfite/θ parts and 3 parts of xylene in a disper, polyester resin [: Desmophengoo (manufactured by Bayer AG); hydroxyl value 290], 0 parts of ethyl acetate, S part of ethyl acetate and three parts of the anti-sagging agent were mixed together and kneaded with ice cream to form the main ingredient.

Separately, tolylene diine 7 anate derivative [Desmo-
(manufactured by lurL Bayer AG)] gθ part and ethyl acetate λθ part were mixed to form a curing agent component.

Mix the main component and curing agent component in the ratio of 'k (/:/),
The paint was made by RARV.

Example A paint was prepared in the same manner as in Example except that trithiotristearyl phosphite was used instead of trithiotrilauryl phosphite.

Example 3 20 parts of leafing type aluminum paste pigment,
After pre-kneading the trithiotrilauryl subsulfite/θ part and the Astragalus part in a disper, 1. j? Lyester resin [Desmophen /, 200 (manufactured by Bayer AG); hydroxyl value / 7-] 660 parts xylene 3 parts 2
and 3 parts of anti-sagging agent were mixed and kneaded in a disper to form a main ingredient.

Separately, part S of hexamethylene diisocyanate derivative [Suzayayama rN (manufactured by Bayer AG)] and part S of ethyl acetate were mixed to form a curing agent component.

A paint was prepared by mixing the main component and the curing agent component at a ratio of 'ft-(2:/).

Example A paint (11-) was prepared in the same manner as in Example except that trithiotricapryl phosphite was used instead of trithiotrilauryl phosphite.

20 parts of the same leafing type aluminum paste pigment as on the left;
Trithiotrioleyl subsulfite/θ part and xylene 3
1 part of epoxy resin [Epicoat Φ10θ/(manufactured by Yuka Ciel Epoxy Co., Ltd., hydroxyl value 37θ), 1 part of xylene left T115 were mixed together in a disper, and kneaded with a disper to obtain the main agent. Separately, as a component, trilenezi f-socyanate derivative [Coronate L (Japanese sword? Manufactured by Riurethane Yan Co., Ltd.)] 11. and ethyl acetate were mixed to form a curing agent component.

Prepare a paint by mixing the main component and curing agent component at a ratio of t (,2:/) and sifting.

Example O: Trithiotrilylnyl sulfite is used in place 9 of trithiotrioleyl phosphite. Same as Example S except for Z. VCl
- A paint was prepared.

Comparative Example/Example/The same procedure as in Example/, except that in the main component, imbutanol was used instead of ethyl acetate as a solvent, and 70 parts of petroleum resin was used instead of 70 parts of trithiotrilauryl phosphite. A paint was prepared.

Comparative Example: A paint was prepared in the same manner as in Example 3, except that 10ijlLs' of trithiotrilauryl phosphite was used as the main component and 77 parts of a mixture of xylene and isobutanol was used in place of 7 parts of xylene. did.

Comparative Example 3 Paint 414 was produced in the same manner as in Example 1, except that tritiotricagroyl sulfite was used in place of trithiotrilauryl phosphite.

Comparative Example A paint was prepared in the same manner as in Example except that trithiotrimerisyl phosphite was used in place of trithiotrilauryl phosphite.

Comparative Example Left Example In the left example, xylene 70 was used as the solvent in the main component.
mixture of xylene and inbutanol instead of
i! 2 was used, and 10 parts of trithiotrioleyl phosphite was replaced with petroleum resin/θ in the same manner as in Example left.

After storing the main component prepared in Example/~B, 2 and Comparative Example/~left for a certain period of time, it was mixed with a curing agent component and applied to the open plate using a full brush to a dry film thickness of 100μ. ,
After natural drying for /week, leafing property was visually judged. The results are shown in Table 1.

Table 7 Judgment Criteria (O←(TS-Δ→ × Good metallic feel Almost no metallic feel Also Examples/
~B and Comparative Examples 7~S 7c and a materials 717
2 last iron plate (S i S , Sa , :2.'/
), ) and a rusted iron plate (2till resin) VC-Apply with a brush in a dry film thickness of 100 μi (two coats, let dry naturally for a week, cross-cut, 1M water spray test (left 0
θ time) and outdoors: 1 exposure test (/year) was conducted and the results are shown in Table λ.

As is clear from Table 7 and Table 1, the paint of the present invention has good leafing properties even after long-term storage, and a coating film with a good metallic feel can be obtained. was. On the other hand, the paint Q1 on the left, the r1M film of the paint Q1 on the left, which does not contain the trithioalcohol compound used in Kibatsu J, had a poor metallic feel and poor rust prevention properties. .

Claims (1)

[Claims] A leafing-type aluminum pigment-containing urethane resin coating composition comprising a phosphorous acid trithioalcohol compound represented by the general formula %) (where n is an integer from g to λ) or 1. A paint composition characterized by containing a diurethane.