JPH0931860A - Wall-decorating material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a wall-decorating material having excellent fireproof performance, good in coating workability and durability, and having sufficient flame retardancy, even when a thick acrylic resin layer is formed, by employing a halogen-free acrylic resin. SOLUTION: A wall-decorating material is produced by laminating a plasticized acrylic resin layer in an adhesion amount of 50-300g/m<2> to a flame- retardant substrate. Therein, the plasticized acrylic resin comprises 100 pts.wt. of an acrylic resin, 30-150 pts.wt. of a plasticizer containing a halogen-free orthophosphoric ester flame-retardant plasticizer in an amount of >=50wt.%, and 60-200 pts.wt. of inorganic particles such as calcium carbonate particles.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall covering material, and more particularly to a wall covering material which does not generate hydrogen chloride gas even during combustion and is excellent in safety and fire protection.

[0002]

2. Description of the Related Art Generally, for interior materials such as wall surfaces of houses and ceilings, wall covering materials in which plasticized vinyl chloride resin is laminated on flame-retardant paper having excellent fireproof performance and workability are widely used.

However, since vinyl chloride resin generates hydrogen chloride (HCl) gas during combustion, wall covering materials using dehalogenating resins such as acrylic resin and olefin resin have been developed. However, since such a resin has high flammability and the calorific value (tdθ) greatly exceeds the standard value of fireproof performance, a resin other than vinyl chloride resin is used to obtain a wall covering material that achieves the standard of fireproof performance. It was difficult.

As a flame-retardant wall material using an acrylic resin, an acrylic wallpaper has been proposed in which a specific inorganic powder is mixed with a water-based acrylic resin. However, when a large amount of inorganic powder is blended, it is water-based, which deteriorates workability when the coating material is applied to the base material, and may reduce strength and durability as a wall material.

Generally, it is desired that the wall covering material containing vinyl chloride resin as a main material is embossed with deep embossing to give a high quality impression. If the resin layer is thickened so that the resin can be deeply squeezed, there is a problem that the flame retardancy is lowered.

[0006]

An object of the present invention is to use a general-purpose acrylic resin as a dehalogenating resin,
It has excellent fire protection performance, good coating workability and durability,
Another object of the present invention is to provide a wall covering material that is thick and has sufficient flame retardancy even when an acrylic resin layer that can be designed such as being squeezed is formed.

[0007]

Means for Solving the Problems As a result of intensive studies, the present inventors have found that the above object can be achieved by a composite material in which a specific plasticized acrylic resin layer is formed on a flame-retardant substrate. Heading, completed the present invention. That is, wall covering of the present invention, on the flame-retardant base, a wall covering the amount deposited was laminated so as to be 50g / m ² ~300g / m ² plasticizing acrylic resin layer, The plasticized acrylic resin layer contains 30 to 150 parts by weight of a plasticizer containing a flame retardant plasticizer in a proportion of 50% by weight or more and 60 to 200 parts by weight of inorganic fine particles with respect to 100 parts by weight of the acrylic resin. It is characterized by

The flame-retardant base material referred to in the present invention is a base material layer of a flame-retardant wall material, which has strength for laminating a plasticized acrylic resin layer, is flexible, and is flame-retardant. There is no particular limitation so long as it is, for example, a flame-retardant paper, a nonwoven fabric, a flame-retardant paper obtained by impregnating a substrate such as cloth and drying, a flame-retardant nonwoven fabric, a flame-retardant cloth,
Examples of the flame-retardant base material include aluminum hydroxide paper, glass fiber paper, asbestos paper and the like.

The plasticized acrylic resin layer referred to in the present invention is a coat layer laminated on this flame-retardant base material, and is a resin mainly composed of an acrylic resin applied to the base material? Alternatively, it is formed by laminating a plasticized acrylic resin processed into a sheet on a substrate.

In the present invention, the acrylic resin forming the plasticized acrylic resin layer includes a copolymer of an acrylic resin and an acrylic monomer with styrene, butadiene, vinyl acetate and the like.

The acrylic resin may be one obtained by an emulsion polymerization method or one obtained by a solvent method.
From the viewpoint of obtaining a uniform resin layer, fine particle acrylic resin having a particle diameter of 15 μm or less is preferably used.

A plasticizer, inorganic fine particles and the like are blended with this acrylic resin to obtain a plasticized acrylic resin layer. The plasticizer contained in this plasticized acrylic resin layer is at least 2-ethylhexyldiphenyl. A halogen-free orthophosphate ester flame retardant plasticizer represented by phosphate, tricresyl phosphate (TCP), trixylenyl phosphate (TXP) and the like is used as a main component, and other compounds may be added. As a plasticizer, phthalic acid di-2-ethylhexyl ester (DO
P), general phthalic acid ester plasticizers represented by phthalic acid diisonyl ester (DINP) and the like. As the plasticizer, one containing no halogen is used.

The halogen-free orthophosphate ester flame retardant plasticizer must be contained in the plasticizer in an amount of at least 50% by weight. The ratio of the halogen-free orthophosphate ester flame-retardant plasticizer to the total amount of the plasticizers added is 50% by weight or more, preferably 7% by weight or more.
It is 0 to 100% by weight, and if the flame retardant plasticizer is less than 50% by weight, it is difficult to impart good fireproof performance.

The total amount of these plasticizers is 30 to 150 parts by weight, preferably 80 to 120 parts by weight, based on 100 parts by weight of the acrylic resin. When the amount is less than 30 parts by weight, good results are obtained. It is difficult to impart fireproof performance, and the acrylic resin layer becomes hard to lower the coating workability, which makes it difficult to apply it as a wall covering material. On the other hand, if the blending amount exceeds 150 parts by weight, it becomes too soft and it becomes difficult to form a resin layer having a desired thickness, which is not preferable as a wall covering material.

The wall particles of the present invention contain inorganic fine particles as a filler. As the inorganic fine particles used, for example, fine particles of an inorganic compound such as calcium carbonate, aluminum hydroxide, magnesium hydroxide, zinc borate, or a metal compound are used. The inorganic fine particles used here do not usually exclude flame retardant fine particles such as antimony trioxide used for flame retardant wall covering materials, but do not use such relatively expensive flame retardant fine particles. By using general-purpose calcium carbonate, aluminum hydroxide or the like as the inorganic filler, sufficient flame retardancy can be obtained.

The particle size of the inorganic fine particles is preferably 1 to 20 μm, and if it is less than 1 μm, the oil absorption of the plasticizer becomes too large and the coating workability deteriorates, and if it exceeds 20 μm, the surface of the wall covering material is increased. Both are not preferable because they affect the condition.

The amount of the inorganic fine particles added is 60 to 200 parts by weight, preferably 80 to 150 parts by weight, based on 100 parts by weight of the acrylic resin.
The smoke suppression effect is reduced, which is not preferable. On the other hand, when the amount added exceeds 200 parts by weight, the strength of the resin layer obtained is reduced, which is not preferable as a wall covering material. The blending amount of the inorganic fine particles is less than 100 parts by weight when the total amount of the acrylic resin and the plasticizer is 100 parts by weight, from the viewpoint of strength, durability and appearance retention of the obtained resin layer. preferable.

In the wall covering material of the present invention, additives such as a foaming agent, a stabilizer, a diluent, and the like, which are blended with a known wall covering resin layer, are added to the wall covering material of the present invention within a range not impairing the effects of the present invention. A flame retardant-imparting agent other than the flame-retardant plasticizer, a colorant, etc. can be used in combination.

In order to enhance the embossing effect of the wall covering material, a foaming agent can be added to the plasticized acrylic resin,
Examples of the foaming agent include azodicarbonamide, dinitrosopentamethylenetetramine, oxybisbenzenesulfonyl hydrazide and the like.

As the stabilizer, Ba-Zn type, Na-Z
Examples thereof include stabilizers such as n-type stabilizers, and as the colorant, general additives used for vinyl chloride resins such as titanium oxide can be used in combination.

When the plasticized acrylic resin layer is used as a base processing, it is preferable to adjust the viscosity suitable for processing by using a diluent such as mineral spirit and normal paraffin.

The plasticized acrylic resin prepared as described above is applied onto a flame-retardant substrate by a known method, for example, a coating method using a roll coater or a knife coater to form a resin layer. . The plasticized acrylic resin has a good coating workability because an appropriate amount of a plasticizer is mixed with the acrylic resin.

The resin layer, when dried, has a weight of 50 g / m.^Two~ 30
0 g / m^Two, Preferably 85 g / m ^Two~ 200g / m^Two
Apply so that the amount of adhesion is in the range of. Traditional acrylic
In the wall covering material having a resin layer, strength, adhesiveness, and difficulty
50g / m from the balance with flammability^Two~ 80g / m^TwoTo
It was difficult to obtain a coating having a deposition amount exceeding
The plasticized acrylic resin layer provides sufficient adhesion and flame retardancy.
And was able to achieve. Here, the adhesion amount is 50 g /
m^TwoIf the amount is less than 1, the adhesion amount is small and the resin layer is too thin and high.
Surface processing such as deep squeezing to give a class feeling is difficult
Become. From this design point of view, the adhesion amount is 85 g / m^Two
The above is preferable. On the other hand, the adhesion amount is 300 g /
m^TwoIf it exceeds, it is possible to impart the desired flame retardant performance.
It is not suitable as a wall covering because it cannot be opened.

In the wall covering material of the present invention, after laminating a plasticized acrylic resin layer on a flame-retardant base material, printing processing or embossing processing is applied as desired, and a printed pattern or a design by drawing is applied to the surface. can do. As the printing process, known means such as gravure printing, rotary screen printing, flexo printing and the like are used. The embossing can be performed by a known method, for example, by forming a plasticized acrylic resin layer, heating it, and embossing it with an embossing roll. Since the wall covering material of the present invention has the resin layer having a sufficient thickness, it is possible to easily give a preferable design to the surface.

[0025]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present description is not limited to these examples. (Preparation of Plasticized Acrylic Resin) According to the formulation shown in Table 1 and Table 2 below, a plasticized acrylic resin paste containing an acrylic resin and a plasticizer, which constitutes the plasticized acrylic resin layer, was prepared.

[0026]

[Table 1]

[0027]

[Table 2]

(Production of wall covering material) The above plasticized acrylic resin paste was applied onto aluminum hydroxide paper (flame retardant paper),
Coated to a thickness of 0.10 mm, then 150
The mixture was heated at 30 ° C. for 30 seconds for gelation to form a plasticized acrylic resin layer. Then, the resin layer is heated by an electric heater so as to reach 180 to 220 ° C. and embossed by an embossing roll, whereby the adhesion amount is about 160 g / m 2.
A flame-retardant wall covering material having a plasticized acrylic resin layer ² was obtained. (Evaluation of flame retardancy) The obtained flame-retardant wall covering material was made to have a thickness of 12.5.
mm, 22 cm × 22 cm noncombustible gypsum board was adhered with starch paste, and a burning test was performed according to the surface test stipulated by Ministry of Construction Notification No. 1828. (Evaluation of coating workability) The workability in coating the plasticized acrylic resin paste was evaluated according to the following criteria.

◯: There was no problem in coating work. ×: dripping occurs, or the spread of the paste is poor,
It could not be applied uniformly. (Evaluation of embossability) The appearance of the embossed pattern of the obtained flame-retardant wall covering material was observed according to the following criteria to evaluate the embossability.

◯: A deep embossed pattern is formed,
The embossability was good. Δ: The embossed pattern was non-uniform and the embossing property was slightly inferior.

X: The depth of the embossed pattern is insufficient,
The embossability was poor. The evaluation results are shown in Tables 1 and 2.

As can be seen from Tables 1 and 2, the flame-retardant wall covering material of the present invention does not generate halogen-based gas and exhibits sufficient flame retardancy. The coating workability and embossability were also good. On the other hand, the wall covering materials of Comparative Example 1 in which the orthophosphate ester flame retardant plasticizer is not mixed in the resin layer and Comparative Example 3 in which the amount of the inorganic fine particles is small are insufficient in the flame retardance, and the inorganic fine particles are In Comparative Example 2 in which the compounding amount is large and in Comparative Example 4 in which the plasticizing agent is large in amount, the coating workability is poor and the embossability is insufficient, and in Comparative Example 5 in which the amount of the plastic acrylic resin layer adhered is small. It was confirmed that the embossability was poor.

[0033]

Since the flame-retardant wall covering material of the present invention has the above structure, the amount of the plasticized acrylic resin layer deposited is 50 to 300 g.
In the range of / m ² , heat generation and smoke generation are low, flame retardancy is excellent, halogen gas such as hydrogen chloride gas is not generated during combustion, and the coating workability is excellent. did.

Claims (1)

[Claims] To 1. A on flame-retardant substrate, a wall covering adhesion amount plasticized acrylic resin layer is laminated so as to be ^{50g / m 2 ~300g / m 2} , the plasticized acrylic The resin layer contains 30 to 150 parts by weight of a plasticizer containing 50% by weight or more of a flame retardant plasticizer with respect to 100 parts by weight of an acrylic resin, and 60 to 200 inorganic fine particles.
A wall material characterized by containing parts by weight.