JPH068355B2 - Interior material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a wood-filled interior material such as a house, a ship, or a vehicle, which has excellent water resistance and a good texture and texture.

[Prior Art] Conventionally, a great variety of materials have been known as interior materials for ceilings, walls, floors, etc. of houses, ships, vehicles, etc. A plate-shaped interior material containing a wood filler is preferred because of its woody feel or soft texture, and is used in some parts.

However, it is difficult to uniformly mix the wood filler with the resin or rubber. When a powder is blended with such a polymer substance, a kneader, a mixer, a roll, or other specially powerful kneader is usually used, and the operation is performed at a considerably high temperature. However, since the wood filler is cohesive, it is difficult to evenly distribute the wood filler in the solid polymer substance even with these powerful kneaders. There is also a limit to the mixing ratio.

Therefore, the conventional plate-shaped interior material with a wood filler is inferior in appearance, which is important as an interior material.
The physical properties such as mechanical strength are unavoidable.

[Problems to be Solved by the Invention] According to the present invention, a wood filler having a good appearance such as texture and texture, and excellent physical properties such as water resistance, sealability and mechanical strength is obtained by uniformly distributing the wood filler. It is intended to provide a plate-shaped interior material containing wood.

[Means for Solving the Problem] The present inventors have conducted various studies in order to form a solid polymer substance in which a wood filler is uniformly distributed, and as a result, a hydroxyl group-containing liquid gen-based polymer and polyisocyanate have been obtained. It has been found that the above object can be achieved when a liquid polymer composition containing a compound and a wood filler is cured and formed, and the present invention has been completed.

That is, the present invention provides an interior material made of a plate-like cured product of a liquid polymer composition containing a hydroxyl group-containing liquid gen polymer, a polyisocyanate compound and a wood filler.

The hydroxyl group-containing liquid gen polymer used in the present invention has a number average molecular weight of having a hydroxyl group in the molecule or at the end of the molecule.
300-25,000, preferably 500-10,000, hydroxyl group content 0.1-10 meq / g, preferably 0.3-7 meq / g
The liquid gen-based polymer of is preferably used.

Examples of the liquid gen-based polymer serving as the skeleton of these hydroxyl group-containing liquid gen-based polymers include polymers or copolymers of gen monomers having 4 to 12 carbon atoms, and further these gen monomers and olefins having 2 to 22 carbon atoms. There are copolymers with monomers. Specifically, butadiene polymer,
Isoprene polymer, butadiene-styrene copolymer, butadiene-isoprene copolymer, butadiene-
Examples thereof include acrylonitrile copolymer, butadiene-ethyl-2-hexyl acrylate copolymer, butadiene-n-octadecyl acrylate copolymer and the like. These liquid gen-based polymers can be produced by heating the conjugated gen monomer in the liquid reaction medium in the presence of hydrogen peroxide.

As the polyisocyanate compound used in the present invention, 1
An organic compound having two or more isocyanate groups in the molecule, which has a reactive isocyanate group for the hydroxyl group of the polyol. Examples of the polyisocyanate compound include ordinary aromatic, aliphatic and alicyclic compounds, such as tolylene diisocyanate (TDI), hydrogenated TDI, hexamethylene diisocyanate, diphenylmethane diisocyanate (MDI), Hydrogenated MDI, liquid modified diphenylmethane diisocyanate, polymethylene polyphenyl isocyanate, xylylene diisocyanate, cyclohexyl diisocyanate, cyclohexanephenylene diisocyanate, naphthalene-1,5-diisocyanate, isopropylbenzene-2,4-diisocyanate, polypropylene glycol and tolylene diisocyanate There are addition reaction products and the like, and among them, MDI, liquid modified diphenylmethane diisocyanate, tolylene diisocyanate and the like are particularly preferable.

The mixing ratio with the polyisocyanate compound used in the present invention is not particularly limited, but is usually the ratio of the isocyanate base (NCO) of the polyisocyanate compound to the hydroxyl group (OH) of the hydroxyl group-containing liquid gen polymer (NCO / OH )
Should be in the molar ratio of 0.2 to 25, preferably 0.5 to 12. If the molar ratio is out of the above range, it becomes difficult to cure, which is not preferable.

The wood filler used in the present invention is not particularly limited in type, shape, size, etc., but wood powder such as sawdust obtained at a sawmill, wood flakes or wood wool such as planks, etc. Can be preferably used.

In particular, it is desirable to use wood powder and wood flakes or wood wool together as the wood filler of the present invention, because it has a unique texture and increases strength.

Smaller these wood fillers are more likely to be uniformly distributed. However, the size of the wood filler has a great influence on the texture of the surface of the plate-shaped interior material, and thus is appropriately selected depending on the use of the interior material. Also, because of the use of cheap raw materials from sawmills, wood powders of 3 to 20 mesh are usually used, and planks of 0.1 to 10 are used.
Those having a length of 1 mm, a width of 2 to 15 mm and a length of 3 to 30 mm can be preferably used.

In the case of the present invention, since the wood filler can be blended without using a kneader, the blending amount of the wood filler is not limited by the difficulty of the kneading operation. Therefore, the mixing ratio of the wood filler is from 5 to 1,000 parts by weight depending on the use of the plate-shaped interior material with respect to 100 parts by weight of the hydroxyl group-containing liquid gen-based polymer.
Although it can be widely selected, it has a physical property of 50-
700 parts by weight are particularly desirable.

The plate-shaped interior material of the present invention is produced from a composition containing the above-mentioned three components as essential components. Other additives may be added depending on the type and blending ratio of these three components and the use of the plate-shaped interior material. ,
For example, a polyol compound, a polyamine compound, a plasticizer, a pigment, another organic or inorganic filler, a curing accelerator, an antiaging agent, an antifoaming agent, etc. as a reinforcing agent can be added to the raw material composition.

That is, first, examples of the reinforcing agent include a polyol compound and a polyamine compound.

The polyol compound that can be used in the present invention is not particularly limited, and any of primary polyol, secondary polyol and tertiary polyol can be used. Specifically, for example, 1,2-propylene glycol, dipropylene glycol, 1,2-butanediol, 1,3-butanediol, 2,
3-butanediol, 1,2-pentanediol, 2,3-pentanediol, 2,5-hexanediol, 2,4-hexanediol, 2-ethyl-1,3-hexanediol, cyclohexanediol, glycerin, N , N-bis-2-
Mention may be made of low molecular weight polyols containing hydroxyl groups bonded to at least one secondary carbon such as hydroxypropylaniline, N, N'-bishydroxyisopropyl-2-methylpiperazine, propylene oxide adducts of bisphenol A.

Further, as the polyol, ethylene glycol having no hydroxyl group bonded to secondary carbon, 1,3-propylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, etc. are used. You can also

As the polyol used in the present invention, diol is usually used, but triol and tetraol can also be used.

Further, in the present invention, a polyol having a molecular weight of 50 to 500 can be preferably used.

The polyamine compound used in the present invention may be any of diamine, triamine and tetraamine.
Further, any of primary polyamine, secondary polyamine, and tertiary polyamine can be used. Examples of the polyamine compound include aliphatic amines such as hexamethylenediamine, alicyclic amines such as 3,3-dimethyl and 4,4-diaminodicyclohexylmethane, aromatic amines such as 4,4-diaminodiphenyl, and 2,4. Examples thereof include tetramine such as 6,6-tri (dimethylaminomethyl) phenol.

The total compounding amount of the polyol compound and the polyamine compound as such a reinforcing agent is not particularly limited, but is usually 1 to 300 parts by weight based on 100 parts by weight of the hydroxyl group-containing liquid gen-based polymer. , Preferably 3 to 100 parts by weight.

Further, as the filler to be added if desired, for example, fiber materials such as Japanese hemp, Manila hemp, jute, paper, straw, carbon fiber, glass fiber and mica, graphite, hirucite, talc, calcium carbonate, slate powder, silica Powder fillers such as

Further, as a viscosity modifier, a plasticizer such as dioctyl phthalate may be added, or a softener such as an aroma-based, naphthene-based, or paraffin-based oil may be added.
To adjust the adhesive strength, tackifying resins such as alkylphenol resins, terpene resins, terpenephenol resins, xyleneformaldehyde resins, rosins, hydrogenated rosins, coumarone resins and petroleum resins can be added.

Further, a curing accelerator such as dibutyltin dilaurate, stannous octoate, or polyethylenediamine may be added. In addition, an antiaging agent may be added to improve weather resistance, and a silicon compound or the like may be added as an antifoaming agent.

Further, a bituminous substance may be added thereto. Bituminous substances include petroleum asphalt, pitch and tar. In this case, the proportion of the bituminous substance can be 10 to 1,000 parts by weight based on 100 parts by weight of the hydroxyl group-containing gen polymer.

The liquid polymer composition in the present invention is prepared as follows.

First, a hydroxyl group-containing liquid gen-based polymer and, if desired, a plasticizer, an antioxidant and other additives are mixed in predetermined amounts, respectively, and stirred at a temperature of 10 to 120 ° C. Then, in the same temperature range, while continuing stirring, a predetermined amount of the wood filler and the polyisocyanate compound are added thereto, whereby the composition can be obtained.

The plate-shaped interior material can be produced from the liquid polymer composition of the present invention under the following conditions.

When press molding is adopted, curing molding can be performed at a temperature of 30 to 150 ° C., a pressure of 30 to 500 kg / cm ² , and a molding time of 0.25 to 3 hours.

Note When adopting the forming type, the temperature is 20 to 150 ° C and the pressure is 100.
Can be cured and molded at ~ 1,000 kg / cm ² .

If cast molding is used, the temperature is 20 to 150 ° C and the time is 24.
Can be cured and molded in ~ 168 hours.

When the polyisocyanate compound is used in a large excess, the curing and molding temperature is preferably around room temperature.

[Effects of the Invention] The plate-shaped interior material of the present invention is an interior material having a uniform woody appearance, as compared with the conventional one, and since the kneading operation by a kneader is not necessary in the manufacturing process thereof, It is advantageous not only that the process is easy, but also that the blending ratio of the wood filler can be freely selected according to the application.

Further, the plate-shaped interior material of the present invention is excellent in various physical properties such as water resistance, sealability and impact resilience because each component is uniformly distributed.

In particular, in the plate-shaped interior material of the present invention, liquid rubber having a better sealing property than ordinary rubber constitutes the matrix of the interior material of the present invention, so that it is necessary to have water resistance and shear resistance as in a bathroom. It is useful because it can be used in places where it is used.

The impact resilience of the plate-shaped interior body of the present invention is inferior to that of the vulcanized rubber due to the difference in elasticity of pure rubber, but does not decrease much even when wood powder is added, and maintains a considerable impact resilience.

EXAMPLES Next, the present invention will be described in more detail with reference to examples.

Examples 1 to 10 The production of the plate-shaped interior material and the test of its properties in this example were carried out as follows.

That is, a predetermined amount of a liquid hydroxyl-containing liquid gen polymer and a polyol compound are placed in a container, to which a plasticizer, an antioxidant and a curing accelerator are added and mixed. Then, in advance,
The wood filler dried at 105 ° C. for 1 hour was added, and the mixture was stirred with a stainless steel rod for 1 minute. The wood filler is evenly dispersed by this brief stirring. Then, a predetermined amount of the polyisocyanate compound is added thereto, and the mixture is stirred with a stainless steel rod for 1 minute to obtain a liquid polymer composition.

Then, this liquid polymer composition was cured and molded by a press molding machine at a molding temperature of 120 ° C. under a molding pressure of 200 kg / cm ² and a molding time of 1 hour to obtain 300 mm in length and 300 mm in width.
A plate-like body having a thickness of 4 mm and a thickness of 4 mm is obtained. However, in Example 8,
Molding temperature 25 ℃, molding time 24 hours, molding pressure 200kg / cm
² was adopted.

The physical properties, texture, and texture of this plate-shaped body were examined.

The impact resilience was measured according to JIS K 6301. In the hot water immersion test, the sample was held in water at 70 ° C. for 168 hours, and then the sample was measured.

The results are shown in the table.

The following raw materials were used in these examples.

Hydroxyl-containing liquid gen-based polymer, Idemitsu Arco Co., Ltd., trade name R-45HT was used. This is a liquid polybutadiene containing terminal hydroxyl groups and has a number average molecular weight of 2,800 and an OH content of 0.79 meq / g.

Polyisocyanate compound A; Diphenylmethane diisocyanate (MDI) B; Tolylene diisocyanate (TDI) Wood filler C; 10-mesh powder wood powder (sawdust) D; 0.7X10X20mm wood flakes (Plant waste) Polyol compound Bisphenol A Propylene oxide compound Polyamine compound; Hexamethylenediamine Plasticizer; Dioctylphthalate Antiaging agent E; 2,2'-Methylenebis (4-methyl-6-t-butyl) phenol F; Pentaerythrityl-tetrakis-3,5- t-butyl-4
-Hydroxyphenol propionate G; 2- (3,5-di-t-butyl-4-hydroxyphenyl) propionate curing accelerator; dibutyltin laurate Separately, 1,800X prepared by the same formulation as each example.
The interior of the ceiling and walls of the bathroom was constructed using a 300X4mm plate. The workability and waterproof sealability were good.

Comparative Example 100 parts by weight of SBR as a vulcanized rubber and 100 parts by weight of pre-dried 10-mesh wood powder, 3 parts by weight of sulfur, 80 parts by weight of dioctyl phthalate, 8 parts by weight of N, N-dinaphthyl-p-phenylenediamine, The mixture was kneaded with 100 parts by weight of carbon black in a closed roll kneader at 122 ° C. for 30 minutes. However, in the kneaded product thus obtained, gel was partially generated, and the wood powder could not be uniformly dispersed. This kneaded product was press-molded in the same manner as in the example to form a plate-like body, each evaluation test was conducted, and the results are shown in the table together with the example.

Claims (1)

[Claims] 1. An interior material comprising a plate-like cured product of a liquid polymer composition containing a hydroxyl group-containing liquid gen polymer, a polyisocyanate compound and a wood filler.