JP2002105159A - Amino resin composition and decorative board using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an amino resin composition having high contamination resistance without impairing the characteristics inherent therein including heat resistance, high hardness and excellent gloss, and to provide decorative boards using the composition. SOLUTION: This decorative board is obtained using a resin composition essentially comprising (A) a compound having at least one amino group in one molecule and also having a triazine ring, (B) formaldehyde and (C) an aliphatic amino compound; wherein the molar ratio: C/A is 0.01 to 0.2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an amino resin composition having excellent stain resistance and a decorative board using the same.

[0002]

2. Description of the Related Art Amino resins have a high curing rate, and the cured products have excellent heat resistance, high hardness and good gloss, and are characterized by melamine resin, urea melamine resin, melamine phenol. In the form of co-condensation resin, etc.
Conventionally, it has been widely used for molding materials, decorative boards, hardeners for paints, wood adhesives, and the like.

[0003] Melamine used as a raw material of amino resin has a triazine ring having three amino groups and has a rigid property. Therefore, a cured product of melamine resin obtained by reacting with formaldehyde has a very high crosslinking density. Melamine resin is used for molding materials, paints, and wood-based adhesives, so phenols, various alcohols, sugars, benzoguanamine, acetoguanamine, etc. It is used after being modified with guanamines, urea and the like. By these modifications, the crack resistance of the cured product and the mechanical strength can be improved, but if the co-condensation with melamine is not sufficient, the additive bleeds out, lowers the mechanical strength, and reduces the crack resistance. There is a defect that causes a decrease and a decrease in surface glossiness.

Further, melamine resin has been conventionally used as a melamine decorative board on the horizontal decorative surface of furniture, but recently, in order to enhance the design, the decorative board is bent.
That is, post-form processing is actively performed. Melamine decorative board has high hardness, but cracks may occur depending on usage environment due to brittleness of resin,
Improvements have been made. Benzoguanamine, modified with guanamines such as acetoguanamine, and by adding various additives, post-form workability and crack resistance have been improved, but it is necessary to increase the amount of addition, melamine resin and If the co-condensation of was poor, water resistance, stain resistance and gloss were reduced, and were not always satisfactory.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made as a result of intensive studies to solve the above-mentioned problems.
It is an object of the present invention to provide an amino resin composition which gives a cured product having good stain resistance without impairing properties such as heat resistance, high hardness, and excellent gloss, and a decorative board using the same.

[0006]

That is, the present invention provides a compound (A) having at least one amino group in one molecule and having a triazine ring, a formaldehyde (B),
And an amino resin comprising an amino resin comprising an aliphatic amino compound (C) as an essential component, wherein the amino resin comprises 0.0 mol of the component (C) per 1 mol of the component (A).
An amino resin composition characterized in that it is synthesized by reacting at a ratio of 1 to 0.2 mol, and that a decorative layer is basically constituted by the amino resin composition and a base material. It is a decorative panel characterized by:

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, in order to solve the conventional problems, an aliphatic amino compound is firmly bonded to a skeleton of an amino resin to form an aliphatic side chain in the amino resin. By improving the hydrophobicity of the resin,
The technical gist is to use an amino resin with improved stain resistance without lowering the water resistance.

The compound (A) having at least one amino group in one molecule and having a triazine ring used in the present invention includes, for example, melamine, acetoguanamine and benzoguanamine. It is not something to be done. These can be used in combination of several types.

The formaldehyde (B) used in the present invention includes not only formalin, which is an aqueous solution of about 40%, but also a formaldehyde polymer represented by HO (CH ₂ O) _n H (n = 8 to 100). Certain paraforms can also be used.

Next, as the aliphatic amino compound (C), methylamine, ethylamine, n-propylamine, iso-propylamine, n-butylamine, i
so-butylamine, tert-butylamine, n-pentylamine, n-hexylamine, 1,3-dimethylbutylamine, 2-heptylamine, 3-pentylamine, n-octylamine, tert-octylamine,
Examples thereof include 2-ethylhexylamine, n-nonylamine, n-decylamine, n-undecylamine, and n-dodecylamine. In order to improve the hydrophobicity, the number of aliphatic carbon atoms is in the range of 6 to 12. And is represented by the general formula (1). _{C n H 2n + 1 NH 2} (1) wherein n is an integer of 6-12.

These preferred compounds include n-hexylamine, 1,3-dimethylbutylamine, 2-heptylamine, 3-pentylamine, n-octylamine, tert-octylamine, 2-ethylhexylamine, n-nonylamine , N-decylamine, n-undecylamine, n-dodecylamine, etc., and any aliphatic chain may be suitably used, whether it is linear or branched.

The amino resin used in the present invention comprises a compound (A) having at least one amino group in one molecule and having a triazine ring, formaldehyde (B), and an aliphatic amino compound (C). First, compound (A) and formaldehyde (B) are reacted at 70 ° C. to 100 ° C. for 10 minutes to 3 hours.
Let react for 0 minutes to dissolve. Subsequently, the aliphatic amino compound (C) is added, and the mixture is reacted at 70 ° C. to 100 ° C. for 20 minutes to 90 minutes. The reaction is performed when the cloudiness point at 20 ° C. with respect to water becomes 800 to 100%, and the reaction is performed as the reaction end point. You.

In the synthesis of the amino resin used in the present invention, the compounding ratio of the compound (A) having at least one amino group in one molecule and having a triazine ring to formaldehyde (B) is not particularly limited. However, the amount of formaldehyde (B) is 1.5 to 1 mole of compound (A).
Preferably it is ~ 3.0 mol. When the amount of formaldehyde (B) is less than 1.5 mol, the compound (A) does not dissolve in the initial addition polycondensation reaction between the compound (A) and formaldehyde (B), and a homogeneous solution cannot be obtained. Also, 3.
When the amount exceeds 0 mol, the curing of the resin proceeds more than necessary,
It becomes brittle.

The proportion of the aliphatic amino compound (C) is
Although it is not particularly limited, the amount is 0.1 to 1 mol of compound (A).
01 to 0.2 mol. When the amount of the aliphatic amino compound (C) is less than 0.01 mol, the effect of hydrophobization is poor,
If it exceeds 0.2 mol, phase separation will result in no stable resin being obtained.

The amino resin composition of the present invention comprises, in addition to the amino resin, a curing agent such as paratoluenesulfonic acid, oxalic acid, and ammonium sulfamate that accelerates the curing reaction when heated and pressed, polyoxyethylene, alkylsulfonic acid, and the like. Salts, surfactants such as lead alkylsulfate, lead alkylsulfate and the like, and additives such as calcium carbonate, aluminum hydroxide, silica, talc, glass fiber and metal powder are added as components and mixed.

The amino resin composition of the present invention is a thermosetting resin having good stain resistance without impairing properties such as heat resistance, high hardness, and excellent gloss. It is also suitably used for agents, decorative boards and the like.

In the decorative board of the present invention, a varnish is prepared by mixing a curing agent and a surfactant with the amino resin composition, and a decorative layer is formed by using a pattern paper for decorative board as a base material.

In the method for producing the decorative board of the present invention, first, the amino resin composition is impregnated into a pattern paper as a varnish and dried in a drying furnace at 80 to 200 ° C. to form a surface layer. Prepare resin impregnated paper. This is laminated on a core layer formed by laminating an impregnated core paper obtained by impregnating a phenol resin varnish into kraft paper or the like, and heating and pressing to produce a decorative board.

[0019]

The present invention will be described in more detail with reference to the following examples, which should not be construed as limiting the present invention.

First, Synthesis Examples 1 to 4 and Comparative Examples 1 to 3 of the amino resin composition will be described. Next, Examples 1 to 4 and Comparative Example 1 in which a decorative board is prepared using this resin composition. 3 will be described.

Synthesis Example 1 126 g (1 mol) of melamine, 129.7 g (formaldehyde 1.6 mol) of 37% formalin, 0.1 g of potassium hydroxide, and 70 g of water were equipped with a stirrer, a condenser, and a thermometer. Put it in a flask,
Stirred at 90 ° C. for 20 minutes. 10 g of n-hexylamine
(0.1 mol) and reacted at 95 ° C. for 20 minutes. The reaction was terminated when the cloud point at 20 ° C. with respect to water became 200%, and melamine resin 1 was obtained.

(Synthesis Example 2) In Synthesis Example 1, 18.5 g of n-dodecylamine was used instead of n-hexylamine.
A melamine resin 2 was obtained in the same manner as in Synthesis Example 1 except that (0.1 mol) was used.

(Synthesis Example 3) Melamine resin 3 was obtained in the same manner as in Synthesis Example 1 except that the amount of n-hexylamine was changed to 15 g (0.15 mol).

(Synthesis Example 4) In Synthesis Example 1, 5.55 g of n-dodecylamine was used instead of n-hexylamine.
Melamine resin 4 was obtained in the same manner as in Synthesis Example 1 except that (0.03 mol) was used.

(Synthesis Comparative Example 1) In Synthesis Example 1, 126 g (1 mol) of melamine, 379.7% formalin 129.7
g (1.6 mol of formaldehyde), 0.1 g of potassium hydroxide, and 70 g of water were placed in a flask equipped with a stirrer, a condenser, and a thermometer, and reacted at 90 ° C. for 40 minutes. The reaction was terminated when the cloud point at 20 ° C. with respect to water reached 200%, and melamine resin 5 was obtained.

(Synthesis Comparative Example 2) In Synthesis Example 1, n-
Melamine resin 6 was obtained in the same manner as in Synthesis Example 1 except that the amount of hexylamine was changed to 25 g (0.25 mol).

(Synthesis Comparative Example 3) In Synthesis Example 1, n-
Melamine resin 7 was obtained in the same manner as in Synthesis Example 1 except that the amount of hexylamine was changed to 0.5 g (0.005 mol).

Example 1 100 parts by weight of melamine resin 1 synthesized according to Synthesis Example 1, 2-amino-2-methyl-
1-propanol sulfamate (Nitto Riken Kogyo,
A varnish was prepared by adding 0.7 parts by weight of Catanit A (trade name, curing agent) and 0.3 parts by weight of Sepal D-489 (manufactured by Chukyo Kasei Co., Ltd., surfactant).

Using this varnish, a resin content of 43%
Decorative paper (120 g / m ² ) was impregnated with a volatile content of 6% and dried to prepare a decorative resin-impregnated paper. The resin impregnated paper for the core was prepared by impregnating kraft paper (190 g / m ² ) with a resole resin so as to have a resin content of 35% and a volatile matter content of 7%, followed by drying.

The above-mentioned three core resin-impregnated papers and one decorative resin-impregnated paper are laminated in this order, and are heated and pressed under the conditions of a molding temperature of 145 ° C. and a molding pressure of 8.2 MPa for 40 minutes.
An 8 mm decorative board was obtained.

The appearance, boiling resistance and stain resistance (office ink) of the obtained decorative board were evaluated. Boiling resistance,
The stain resistance was measured according to JIS K6902.

(Example 2) A decorative plate was obtained in the same manner as in Example 1 except that melamine resin 1 was replaced by 100 parts by weight of melamine resin 2 synthesized in Synthesis Example 2. . The obtained decorative board was the same as in Example 1,
The appearance, boiling resistance and stain resistance (office ink) were evaluated.

Example 3 A decorative plate was obtained in the same manner as in Example 1, except that 100 parts by weight of the melamine resin 3 synthesized in Synthesis Example 3 was used instead of the melamine resin 1. . The obtained decorative board was evaluated for appearance, boiling resistance and stain resistance (office ink) in the same manner as in Example 1.

Example 4 A decorative plate was obtained in the same manner as in Example 1 except that 100 parts by weight of the melamine resin 4 synthesized in Synthesis Example 4 was used instead of the melamine resin 1. . The appearance, boiling resistance and stain resistance (office for office use) of the obtained decorative board were evaluated in the same manner as in Example 1.

Comparative Example 1 A decorative plate was obtained in the same manner as in Example 1, except that 100 parts by weight of the melamine resin 5 synthesized in Synthesis Example 5 was used instead of the melamine resin 1. . The appearance, boiling resistance and stain resistance (office for office use) of the obtained decorative board were evaluated in the same manner as in Example 1.

Comparative Example 2 A decorative plate was obtained in the same manner as in Example 1 except that 100 parts by weight of the melamine resin 6 synthesized in Synthesis Example 6 was used instead of the melamine resin 1. . The appearance, boiling resistance and stain resistance (office for office use) of the obtained decorative board were evaluated in the same manner as in Example 1.

Comparative Example 3 A decorative plate was obtained in the same manner as in Example 1, except that 100 parts by weight of the melamine resin 7 synthesized in Synthesis Example 7 was used instead of the melamine resin 1. The appearance, boiling resistance and stain resistance (office for office use) of the obtained decorative board were evaluated in the same manner as in Example 1.

The evaluation results of Examples 1 to 4 and Comparative Examples 1 to 3 are summarized in Tables 1 and 2, respectively.

[0039]

[Table 1]

[0040]

[Table 2]

Examples 1 to 4 using the amino resin composition containing the aliphatic amino compound according to the present invention showed good results in appearance, boiling resistance and stain resistance. on the other hand,
Comparative Example 1 containing no aliphatic amino compound showed no change in the boiling resistance test and good water resistance, but a slight change was observed in the stain resistance test. Compared with the present invention, Comparative Example 3 using an amino resin having a small proportion of an aliphatic amino compound is insufficient in stain resistance, and Comparative Example 2 using an amino resin having a large proportion of an aliphatic amino compound is As a result, the appearance was poor and the boiling resistance was also reduced.

[0042]

The amino resin composition containing the aliphatic amino compound according to the present invention has high stain resistance and excellent water resistance, and the cured product has excellent heat resistance. High hardness and excellent gloss. The present invention provides an amino resin composition suitably used for decorative board applications requiring design properties and durability, and a decorative board using the same, and has extremely high industrial utility value. Things.

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 2E110 AA02 AA12 AA26 AA65 BA12 GA33W GB49W GB63W 4F100 AK33 AK35A AK36 AL05A BA01 BA02 BA03 BA04 BA05 BA14 DG10 DH01 EJ17 EJ42 EJ82 EJ86 GB07 GB81 JB03J02 J03 J03 J03 J03 J03 EA11 EA34 EA36 EA45 EA52 EB01 EB25 HA28 HB01

Claims (3)

[Claims] 1. An amino resin comprising a compound (A) having at least one amino group in one molecule and having a triazine ring, formaldehyde (B), and an aliphatic amino compound (C) as an essential component. Wherein the amino resin is synthesized by reacting the component (C) at a ratio of 0.01 to 0.2 mol per 1 mol of the component (A). Amino resin composition. 2. The amino resin composition according to claim 1, wherein the aliphatic amino compound (C) is a compound represented by the general formula (1). _{C n H 2n + 1 NH 2} (1) (n in the formula is an integer of 6-12.) 3. A decorative board, characterized in that a decorative layer is basically constituted by the amino resin composition according to claim 1 and a substrate.