JPH0737452B2 - S-triazine containing compound - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a novel compound useful for adhesives, paints, laminating materials, molding materials and the like.

<Prior Art and its Problems> Conventionally, epoxy resins have been widely used for the above-mentioned applications and the like, but the resins have various excellent properties, but have insufficient heat resistance. On the other hand, as a material having excellent heat resistance, for example, a triazine-based resin called Triazine A is known, which further converts a dicyanate compound by the reaction of bisphenol A and croscian into a prepolymer. This resin has not only heat resistance but also various excellent properties, but the cyanate group present in the resin is easily hydrolyzed, and there are problems in storage stability and handling.

From this, the present inventor has conducted extensive studies to develop a curable resin having characteristics equal to or higher than those of these triazine-based resins, and having excellent storage stability. It has been found that a triazine-based resin obtained from S-triazine trihalide is suitable for these purposes. However, when this triazine-based resin was heat-polymerized with the polymaleimide compound to obtain a cured product, the curing speed was too fast, and the workability in curing and molding was very poor.

Therefore, the present inventor has made earnest studies to develop a resin which has excellent physical properties such as heat resistance and storage stability, and has excellent workability during curing molding, and as a result, is represented by the general formula (2). Compound (hereinafter referred to as propenylphenol)
It was found that the triazine-based resin obtained from S-triazine trihalide and S-triazine trihalide has not only excellent physical properties and storage stability, but also excellent workability during curing and molding. I arrived.

(In the formula, R ₁ and R ₂ represent a hydrogen atom or a C _{1 to} C ₅ alkyl group or an alkoxy group.) <Means for Solving Problems> That is, the present invention is represented by the following structural formula (1). Represented by S-
Providing triazine compounds (In the formula, R ₁ and R ₂ represent a hydrogen atom or a C _{1 to} C ₅ alkyl group or an alkoxy group.) The compound of the present invention has a C _{1 to} C ₅ alkyl group or an alkoxy group substituted or not. Substituted propenylphenol and S-
It is obtained by reaction with triazine trihalide, for example, S-triazine trichloride, and has a triazine skeleton in the molecule.

In the reaction of propenylphenol and S-triazine trihalide, the reaction molar ratio is usually 8: 0.8 to 1.2, and since this reaction is dehydrohalogenation, it is a side reaction for removing the generated hydrogen halide. It is necessary to have about 1 mol of base present in the reaction system per mol of hydrogen halide produced.

Examples of such bases include alkali metal hydroxides such as sodium hydroxide or potassium hydroxide, alkali metal carbonates such as sodium carbonate or potassium carbonate, alcoholates such as sodium methylate or potassium tertiary butyrate, or triethylamine, diethyl. It is an eighth amine such as aniline and pyridine.

The reaction is usually carried out in a solution or suspension system, and as a reaction solvent suitable for such a reaction, for example, lower aliphatic alcohol such as methanol, ethanol, n-propanol or iso-propanol, acetone, methyl ethyl ketone, diethyl ketone. , Aliphatic ketones such as methyl isopropyl ketone or methyl isobutyl ketone, aliphatic hydrocarbons, preferably aliphatic hydrocarbons which are fractions that accumulate during the distillation of naturally occurring mixtures such as petroleum ether, light petrol or petrol, Aromatic hydrocarbons such as benzene, toluene and xylene, halogenated hydrocarbons such as dichloromethane, dichloroethane, perchlorethylene, chlorobenzene and dichlorobenzene, diethyl ether or diisopropyl ether. Come ether, dioxane, cyclic ethers such as tetrahydrofuran, nitromethane, nitrobenzene or nitrotoluene such nitro hydrocarbon, and water are exemplified.

The reaction is usually carried out at 0 to 100 ° C, preferably 70
It is below ℃.

The reaction mixture obtained by such a reaction is prepared according to a known method, for example, when an organic solvent is used as a reaction solvent, water is added to the reaction mixture to remove the by-produced hydrohalide as water. And the aqueous solution is separated,
The target polymerizable unsaturated compound is obtained by removing the solvent by distillation or the like. Of course, this treatment is not limited to the above method, and an arbitrary method is selected according to each manufacturing condition.

<Effects of the Invention> The polymerizable unsaturated compound of the present invention thus obtained is heat-polymerized with a polymaleimide compound having two or more maleimide groups in the molecule, and has a good balance in heat resistance, mechanical properties and electrical properties. It provides an excellent cured product.

Further, as compared with a known triazine-based resin obtained from isopropenylphenol and S-triazine trihalide, curing time is long, non-uniform reaction is unlikely to occur, and workability during curing molding is excellent.

The polymaleimide compound is a compound containing two or more maleimide groups represented by the general formula (3) in the molecule.

(In the formula, R ₁ represents a hydrogen atom or a lower alkyl group.) Specific examples thereof include N, N'-diphenylmethane bismaleimide, N, N'-phenylene bismaleimide, N, N'-
Diphenyl ether bismaleimide, N, N'-diphenylsulfone bismaleimide, N, N'-dicyclohexylmethane bismaleimide, N, N'-xylene bismaleimide, N, N'-tolylene bismaleimide, N, N'-benzophenone bis Maleimide, N, N'-diphenylpropane bismaleimide, N, N'-diphenyl sulfide bismaleimide, N, N'-xylylene bismaleimide, N, N'-diphenylcyclohexane bismaleimide, N, N'-dichloro-diphenylmethane Bismaleimide, N, N'-diphenylmethane bismethylmaleimide, N, N'-diphenylether bismethylmaleimide, N, N'-diphenylsulfone bismethylmaleimide (each including isomers),
N, N'-ethylene bismaleimide, N, N'-hexamethylene bismaleimide, N, N'-hexamethylene bismethyl maleimide, N, N'-oxypropylene bismaleimide, and these N, N'-bismaleimide compounds And the terminal obtained by adding diamines N, N-bismaleimide prepolymer having a bone nucleus, and aminophenyl-1,
Maleimide compounds of 3,3-trimethyl-aminoindan, bisaminophenoxybenzene, 2,2-bisaminophenoxyphenylpropane, 4,4-bisaminophenoxydiphenylsulfone (each containing isomers), aniline / formalin polycondensate Or a methylmaleimide compound etc. can be illustrated.

The compounding ratio of the S-triazine compound and the polymaleimide compound of the present invention can be in a wide range, but a particularly preferable range is 0.4 to 3 equivalents of maleimide group to 1 equivalent of alkenyl group. If either the S-triazine compound or the polymaleimide compound is extremely abundant, the curability, heat resistance, etc. will decrease.

Regarding the method of heat curing, it is possible to easily perform heat curing without a catalyst, and it is also possible to perform heat curing using a radical polymerization initiator such as an organic peroxide or an azo compound in combination. Examples of such radical polymerization initiators include benzoylperoxide, di-t-butylperoxide, dicumylperoxide, lauroylperoxide and acetylperoxide.
Oxide, methyl ethyl ketone peroxide, cyclohexane peroxide, t-butyl hydroperoxide, azobisisobutyronitrile, and the like. Other tertiary amines such as tributylamine, triethylamine and triamylamine, benzyltriethylammonium chloride,
It is also possible to use a quaternary ammonium salt such as benzyltrimethylammonium hydroxide, an imidazole, a boron trifluoride complex, a transition metal acetylacetonate, etc. in combination. The curing temperature is preferably 50 to 300 ° C.

Also, a known polymerization inhibitor may be used in combination in order to adjust the curing speed. For example, 2,6-di-t-
Butyl-4-methylphenol, 2,2'-methylenebis (4-ethyl-6-t-butylphenol), 4,4'-
Methylnbis (2,6-di-t-butylphenol), 4,
4′-thiobis (3-methyl-6-t-butylphenol), phenols such as hydroquinone monomethyl ether, hydroquinone, catechol, pt-butylcatechol, 2,5-di-t-butylhydroquinone, methylhydroquinine, Polyphenols such as t-butyl hydroquinone pyrogallol, phenothiazine compounds such as phenothiazine, benzophenothiazine and acetamide phenothiazine, N such as N-nitrosodimethylamine
-There are nitrosamine compounds.

Further, the curable resin composition may be used in combination with a filler, a filler, a reinforcing agent, a pigment or the like, if necessary. For example, silica, calcium carbonate, antimony trioxide, kaolin,
Titanium dioxide, zinc oxide, mica, barite, carbon black, polyethylene powder, polypropylene powder, aluminum powder, iron powder, copper powder, glass fiber, carbon fiber, alumina fiber, asbestos fiber, etc. are used for molding, lamination, adhesive, Used for composite materials. Further, other known thermosetting resins such as alkenyl group-containing resin or triazine group-containing resin other than the present invention, unsaturated polyester resin, epoxy resin, silicone resin, phenol resin and the like may be added depending on the purpose.

The use of the compound of the present invention has been described above, but the present invention is not limited to these.

<Example> The present invention will be described in the following examples.

Example 12.9 g (0.07 mol) of cyanuric chloride, 28.2 g (0.21 mol) of o-propenylphenol and 70.0 g of acetone were charged and dissolved in a four-necked flask equipped with a stirrer, a thermometer and a dropping funnel. Then, while maintaining the temperature at room temperature, 10%
88.2 g (0.221 mol) of NaOH aqueous solution was added dropwise over 1 hour. After the dropping, the temperature was kept at the same temperature for 1 hour, the product was taken out, washed with water and dried to obtain the following compound.

The obtained compound had a melting point of 123-126 ° C., elemental analysis was carbon 75.8%, hydrogen 5.81%, and nitrogen 8.77%. Together with the FD-MS (FIG. 1) and NMR (FIG. 2) analysis results. , Tris (o-propenylphenoxy) -S-triazine (PPT
And)).

Reference Example and Comparative Reference Example As a PPT of the present invention and as a comparison, tris (isopropenylphenoxy) -S-triazine (referred to as IPT) was examined for gel time with the following formulation. It can be seen that PPT has a longer curing time than IPT, is less likely to undergo a non-uniform reaction, and is easily cured.

[Brief description of drawings]

FIG. 1 shows the FD-MS spectrum of the compounds obtained in the examples. FIG. 2 shows the NMR spectra of the compounds obtained in the examples.

Claims (1)

[Claims] 1. An S-triazine compound represented by the following structural formula (1). (In the formula, R ₁ and R ₂ represent a hydrogen atom or a C _{1 to} C ₅ alkyl group or an alkoxy group.)