JPS59126477A - Fire resistant paint - Google Patents

Abstract

PURPOSE:To provide a fire resistant paint having excellent flame retardance and water resistance, resistant to the spread of fire, and suitable for the covering of a laid cable, etc., by adding specific amounts of a flame retardant, a photo- setting monomer and water to a water-soluble or water-dispersible rubber or plastic. CONSTITUTION:The objective paint is prepared e.g. by mixing (A) mixture of (i) 100pts.wt. of a water-soluble or water-dispersible rubber or plastic and (ii) <=10pts.wt. of polyvinyl alcohol with (B) 100-200pts.wt. of a flame retardant and (C) <=100pts.wt. of water, and mixing the resultant mixture futher with (D) 2-40pts.wt. of a photo-setting monomer.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a fireproof coating applied to the outside of laid cables and the like for the purpose of preventing the spread of fire.

(Technical Background of the Invention) Generally, laid cables and various buildings are coated with fireproof paint to prevent the spread of fire.

Such fire-prevention paints usually consist of organic resins, to which large amounts of flame retardants, stabilizers, and other additives are added, as well as an appropriate amount of water or organic solvents as viscosity modifiers. .

Table 1 shows formulation examples of typical conventional fire protection paints.

(Problems in the background art) However, among these conventional fire protection paints, those that use organic solvents as viscosity modifiers generate a large amount of organic solvent gas when drying and solidifying, especially when used in existing plants. Not only was this an undesirable work environment, but it also had the risk of causing a fire.

In addition, fire protection paints that use water as a viscosity modifier form a strong coating film when completely dried, but
It has the disadvantage that it is difficult to dry in a high humidity atmosphere, and a coating film with good water resistance cannot be obtained.

(Object of the Invention) The present invention has been made to eliminate these drawbacks, and provides a fire-retardant paint that does not generate harmful gases during drying and solidification and can form a coating film with good water resistance. The purpose is to provide.

(Summary of the Invention) That is, the present invention provides 100 to 200 parts by weight of an organic or inorganic flame retardant and 2 parts by weight of a photocurable monomer to 100 parts by weight of water-soluble or water-dispersible rubber or plastic.
This is a fire-retardant paint characterized by being made of a mixture of ~40 parts by weight and 100 parts by weight or less of water.

Examples of water-soluble or water-dispersible rubbers or plastics used in the present invention include EVA II fat and chloroprene copolymer. is preferred.

Further, organic or inorganic flame retardants used in the present invention include decabromidiphenyl ether, antimony trioxide, aluminum hydroxide, etc., and all commonly used flame retardants can be used. Commercially available flame retardants include Dechlorane Plus 25 (trade name of 7Tsuriki Chemical Co., Ltd.), an organic type, and Heijirai H42 (trade name, manufactured by Showa Light Metal Co., Ltd.), an inorganic type.
company's product name) etc.

The photocurable monomer used in the present invention has a photofunctional reactive group in its molecule and is easily combined and cured by irradiation with light such as ultraviolet rays to form a three-dimensional structure. In the present invention, such photocurable monomers include trans
- It is preferable to use cinnamic acid aldehyde, benzophenone, etc.

In the present invention, the amount of the above-mentioned flame retardant and the above-mentioned photocurable monomer is 100 to 200 weight per 100 weight of the solid content of the water dispersion or latex of the water-soluble or water-dispersible rubber or plastic. Part and 2~
The amount is 40 parts by weight. The reason for limiting the blending amounts to the above range is as follows. That is, if the amount of the flame retardant is less than 100 parts by weight, a sufficient flame retardant effect cannot be achieved, and on the other hand, if it exceeds 20 ONiJf parts, the mechanical properties of the coating film will deteriorate, which is not preferable.

Furthermore, if the amount of the photocurable monomer is less than 2 parts by weight, a coating film with good water resistance cannot be obtained, whereas if it exceeds 40 parts by weight, the mechanical properties of the coating film will be insufficient. This is because it is also not desirable.

In the present invention, 100 parts by weight or less of water is added to the above ingredients in order to adjust the viscosity of the paint. The amount of water mixed can be changed as appropriate depending on the coating method, but
For example, when applying with a spray gun, 80 to 100 parts by weight of the water-soluble or water-dispersible rubber or plastic 100 nail part is used, and when applying by brushing, 70 parts by weight is used.
It is desirable that the amount is about parts by weight.

In the present invention, in addition to the above-mentioned ingredients, polyvinyl alcohol may be added as a viscosity modifier, preferably 2 to 5 parts by weight, from 10 parts by weight or less, and if necessary, trimethylolpropane trimethacrylate, etc. Water resistance can be further improved by adding a polyfunctional monomer.

In addition, kynol (
By mixing flame-retardant organic fibers such as Nippon Kynol Co., Ltd. (trade name), the fire-retardant properties can be further improved.

Furthermore, it is also possible to add and mix other additives such as stabilizers, bactericides, pigments, and plasticizers.

To prepare the fire protection paint of the present invention, among the above ingredients, first, rubber or plastic in an aqueous dispersion or latex state, polyvinyl alcohol, and a stabilizer are mixed using a suitable blender, and then this is mixed. flame retardant,
It is preferable to gradually add the flameproof fiber and water while mixing, and finally add the photocurable monomer and polyfunctional monomer.

The thus obtained fire-retardant paint of the present invention is coated onto the surface of the object to be coated using an appropriate method, dried, and simultaneously irradiated with ultraviolet rays, thereby achieving not only good flame retardancy but also excellent water resistance. Forms a coating film.

(Example of the invention) Next, examples of the present invention will be described.

Examples 1 and 2 A fireproof paint was prepared by mixing the ingredients shown in Table 2 in the proportions shown in the table (the numbers in the table indicate parts by weight).

The obtained fireproofing paint was brushed onto the surface of a 3×5.5sq ORE cable so that the thickness after drying was 1.5 coats, and while the paint film was drying, it was irradiated with ultraviolet rays for 24 hours.

The resulting cured coating was then tested for water resistance, oxygen index and flame retardancy.

The test results are shown in Table 2.

In addition, for comparison, a fire prevention paint was prepared by mixing the ingredients shown in Table 2 Comparative Example, and this fire prevention paint was also applied to the surface of a cable of the same size as in the example at a thickness of 1.5 coats.
The same tests were carried out on the coatings obtained after drying.

The results of these tests are also shown in Table 2. - Table 2 (Effects of the Invention) As is clear from the examples above, the fire-retardant paint of the present invention cures by applying and drying the surface of a cable, etc. and simultaneously irradiating it with ultraviolet rays, resulting in flame-retardant properties. It forms a coating film that not only has excellent water resistance but also excellent water resistance.

Moreover, since water is used as a solvent for adjusting the viscosity, no harmful residue is generated during drying and the working environment is not degraded.

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Claims (1)

[Claims] 1. Water-soluble or water-dispersible rubber or plastic 10
100 parts by weight of organic or inorganic flame retardant
~290 parts by weight, and 2 to 40 parts by weight of photocurable monomer,
and 100 parts by weight or less of water.