JPS59135262A - Japanese lacquer-like paint - Google Patents

Abstract

PURPOSE:To provide a Japanese lacquer-like paint which has good coating efficiency, coating workability and long-term stability and gives a coating film having higher boiling water resistance than that of Japanese lacquer, by using a polyol contg. oil and fat and raw Japanese lacquer as main ingredient and blending a diisocyanate compd. as a hardener therewith. CONSTITUTION:A polyol (e.g. alkyld polyol, acrylic polyol, polyether polyol or polyester polyol) contg. oil and fat (e.g. fatty acid, oil contg. fatty acid, copolymerized oil or petroleum resin) and raw Japanese lacquer are used as main ingredients, and a diisocyanate such as 2,4-tolylene diisocyanate or 2,6- tolylene diisocyanate is used as a hardener. The reason the polyol contg. oil and fat is used as a polyol constituting a urethane resin is that when a poloyl contg. no oil and fat is used, the compatibility of Japanese lacquer with the urethane resin is poor, while when the polyol contg. oil and fat is used, the compartibility can be improved.

Description

[Detailed description of the invention] The present invention is a lacquer-like paint used when applying a lacquer-like finish to the surface of daily necessities such as jubako, soup bowls, trays, frames, etc. It has good coating workability, long-term stability, etc., and can form a lacquer-like coating that maintains the same gloss, texture, appearance, etc. as lacquer, and exhibits boiling water resistance higher than that of lacquer. The purpose is to provide lacquer-like paints.

Conventionally, when a lacquer-like finish is not applied to the surface of daily necessities as described in -1-, a lacquer-like coating film with a texture is formed.
The surfaces of daily necessities are coated with raw lacquer many times to give them a lacquer-like finish, and they need to be dried for a long time at a constant humidity.
It had the disadvantage of poor coating efficiency, and it was difficult to give a rating of 4 for the boiling water resistance of the coating film.

In addition, in order to improve the coating efficiency of Jμ raw lacquer, in recent years 1,
At painting sites, attempts are being made to spray paint by mixing raw lacquer and synthetic resin paint, but the raw lacquer and synthetic resin paint are not compatible with each other, and the amount of paint increases as time passes after mixing. Since it tends to cause viscosity, powder generation, two-layer separation, etc., there are problems in terms of coating workability, long-term stability, etc., and it has not been possible to obtain a product that is practically satisfactory.

The present invention improves all the above-mentioned conventional drawbacks,
Lacquer-like paint is made by mixing raw lacquer with a specific urethane resin.

, Hereinafter, the present invention will be explained in detail.

The present invention consists of 1. For example 1. Fatty acids 1. Alkyd polyols and acrylic polyols mainly containing oils and fats such as oils containing fatty acids, copolymerized oils obtained from fatty acids, and petroleum resins.1. Polyols such as polyether polyol, polyether polyol, polyether polyol, polyether polyol, and raw lacquer are used as the main Δl, and 2, 4
−． 1- Re-renji Iishia, I-to, 2.6-
The present invention relates to a lacquer-like abrasive characterized by using a diisocyanate compound such as , tolylene diisocyanate, or 1,5-naphthyl diisocyanate as a hardening agent. , .

In addition, in the above-mentioned present invention G, examples of fatty acids include:
Various fatty acids such as oleic acid, linoleic acid, linoleic acid, eleostearic acid, fluid eleostearic acid, parinaric acid, ricanic acid, etc., or dimer acids of these various fatty acids, □ and others are used. .
'□ Also, examples of oils containing fatty acids include isomerized oils such as tung oil, dehydrated castor oil, isomerized soybean oil, and conjugated linseed oil. □Also, as the copolymerized oil extracted from the fat i in a barrel, for example, urethanized oil, maleated oil, and others are used.

In addition, the polyol containing oils and fats refers to polyols that have been modified by reacting polyoats mixed with the above-mentioned oils and fats, or by reacting the above-mentioned oils and fats.

In addition, the features of the present invention are that the raw lacquer is
, a urethane resin containing i-lyol as a main ingredient and a diisocyanate-1- compound as a curing agent is mixed, and ゛M(
- Polio containing oils and fats as urethane resin, -
The reason is that a specific urethane resin is used to blend the resin.

In other words, the reason for using a polyol containing oils and fats as the polyol constituting the urethane resin is that if a polyol that does not contain oils and fats is used, the compatibility between raw lacquer and urethane resin is poor, and the resulting paint This is because while polyols have drawbacks such as poor coating workability and poor long-term stability, when polyols containing oils and fats are used, these drawbacks can be improved. ' □ Also, in contrast to raw lacquer Q, "1 polyol and C"2
Yes, yo'1 compound, 'pregnancy'9'' mJ) J a mixture.

The reason for this is that when raw lacquer is used on a vehicle, it has to be coated many times to form a lacquer-like paint film that has a textured feel because the raw lacquer has a poor texture. However, compared to raw lacquer, the above-mentioned points 1, 7, and , Itsuuaneni, than the compound.

When mixed with urethane resin (the gloss of lacquer, ritual tools, etc.
In order to maintain the appearance and improve the above-mentioned drawbacks of raw lacquer, you can simply spray paint it like regular paint without having to cut it over and over again. This is because a lacquer-like coating film with good urine properties can be formed efficiently.

□Also, 1. I tone paint number of the present invention? In addition to the above-mentioned main agent and curing agent, pigments such as carbon black, IJ powder, red iron oxide, titanium white, etc., and solvents such as xylene and toluene may be added as necessary. . '□I'' 2, this lacquer-like paint is made by mixing raw lacquer Q with oil-containing oil, which is the main component, and diisocyanate compound, which is a curing agent component. In addition to being able to form a lacquer-like coating film with a solid feel by just one spray coating without the need for multiple coats, it also allows raw lacquer, polyols, and diisocyanate compounds to be smoothly compatible and compatible. Therefore, the coating efficiency, coating workability, and long-term stability are good, and the obtained lacquer-like coating maintains the same gloss, texture, appearance, etc. as lacquer, and has better boiling water resistance than raw lacquer. It is suitable for use when painting and painting the surfaces of daily necessities to give them a lacquer-like finish.

Hereinafter, the present invention will be explained based on examples.

Example 1 (Main ingredient) Tung oil modified polyester polyol 80 parts by weight Fresh lacquer 20 Carbon black 5 Silica powder
10 〃 Xylene 50 〃 (Curing agent) 2,. 4= Tolylene diisocyanate 5Qi
Part i: The base material obtained by mixing the above-mentioned raw lacquer, tung oil-modified polyester polyol, etc. does not cause thickening, granulation, or two-layer separation even after half a year, and has good painting workability and long-term stability. The paint obtained by mixing the main agent and hardening agent was spray-painted on the surface of the tray base material. Can form a toning coating film, and has a Q of 10 during diving.
No change in the appearance of the lacquer-like coating film G was observed even after immersion for a period of time, and the boiling water resistance was good.

Example 2 (Main ingredient) Acrylic polyol 60 parts by weight Petroleum resin 20 Raw lacquer] 5
〃Bengala
20 Kishin
30 (Curing agent) 2, 6-tolylene diisocyanate 25 parts by weight
As in Example 1, the base material described above had good coating workability, long-term stability, etc., and when the paint obtained by mixing the base material and curing agent was spray-painted on the surface of the tray base material, no results were obtained. A lacquer-like coating film having boiling water resistance equivalent to that of Example 1 could be formed.

Comparative Example 1 When conventionally used raw lacquer was applied to the surface of Bon Motogetsu with a brush, it was necessary to apply this raw lacquer several times to form a thick lacquer-like coating with a fleshy feel. Also, in terms of coating properties, when the coating was immersed in Sumoto for 10 hours, the gloss of the coating decreased and there were problems with boiling water resistance.

Comparative Example 2 For reference, in Example 2, petroleum resin was not used,
In the paint obtained in accordance with Example 2, the raw lacquer was not compatible with the smooth Q, and a paint that could be put to practical use could not be obtained.

Claims (1)

[Claims] (1) Main ingredients are polyol containing oils and fats and raw lacquer,
A lacquer-like paint characterized by comprising a diisocyanate compound as a hardening agent.