JPS6343078Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a laminate mainly used as a building material. Mold often grows and grows on walls, floors, or ceilings in areas with high humidity or moisture, such as kitchens and washrooms, or on furniture placed in such environments. The present invention relates to a laminate used for such walls and furniture, and its gist is that a thin exterior plate such as a veneer, a surface board, or a decorative board and a base material such as particle board or laminated wood are used. It is bonded with a layer of antibacterial polymer adhesive material to which an antibacterial agent is chemically bonded. The drawing shows an example of the laminate of this invention, in which 1 is a thin exterior plate, 2 is a layer of antibacterial polymeric adhesive material to which an antibacterial agent is chemically bonded, and 3 is a substrate. The polymeric adhesive material layer having antibacterial properties is formed by reacting an antibacterial agent such as a metal ion or a quaternized ammonium base with a functional group capable of forming an ionic bond, a covalent bond, or a complex bond, such as a carboxyl group, a sulfone group, or a metal ion. This is a polymeric adhesive material having antibacterial properties, in which the antibacterial agent is bonded to a thermally adhesive polymeric material containing a functional group capable of forming a complex, such as an acrylic thermal adhesive material. These antibacterial polymer adhesive materials chemically bonded with antibacterial agents gradually release the antibacterial agents, so mold will not form or grow on the surface of the exterior thin panels over a long period of time. It is something. Next, an example of the present invention will be shown. In addition, the middle part of the sentence and %
"" means parts by weight and % by weight, respectively. Example 100 parts of a monomer mixture consisting of 39.9% methyl methacrylate, 55% n-butyl acrylate, 5% acrylic acid and 0.1% lauryl mercaptan was mixed into an aqueous solution containing 0.5% ammonium persulfate and 5% emulsifier.
Disperse in 150 parts and 70 parts with stirring in _N2 atmosphere.
Polymerization was initiated at 75°C and maintained at about 75°C for 5 hours to complete polymerization. After the polymerization was completed, the coagulum contained in the emulsion was removed by sieving to obtain an emulsion with approximately uniform particle size. This emulsion has a non-volatile solids content of 44% and an average particle size of 0.08μ.
After casting this on a glass plate, immediately water obtained by dissolving 5% hydrochloric acid: methyl ethyl ketone (7:
3) Obtain a porous coagulum in which some of the particles are fused by immersing it in the mixed medium for about 5 minutes, and immersing it in pure water to replace the absorbed medium with water until it reaches an equilibrium state. After that, the coagulated material was peeled off from the glass plate, washed with water, and dried. The resulting porous coagulate was immersed in a 10% benzalkonium chloride aqueous solution for 20 minutes, thoroughly washed with water, and dried to form a polymer adhesive film in which benzalkonium chloride was chemically bonded and fixed to carboxyl groups. Obtained. This adhesive film is bonded to laminated wood and veneer board (thickness 0.5
mm) and heated and pressurized at 150° C. for 5 minutes to obtain a laminate of the present invention. The durability of the antibacterial activity of this laminate was evaluated as follows. That is, using Cladosporium resinae as the test bacterium, the veneer surface of the laminate was washed repeatedly with 5 parts water per wash, and sustainability was evaluated by the number of washings until the antibacterial activity disappeared. did. The results are shown in Table 1. The comparative example in Table 1 is a laminate using a polymer adhesive film formed by blending an aqueous solution of benzalkonium chloride with an emulsion made of the monomer mixture not containing acrylic acid.

[Table] The evaluation in Table 1 is ○ if an inhibition zone was formed using the disk method, and △ if a small amount of inhibition zone was formed.
Those that were not formed were marked as x.

[Brief explanation of the drawing]

The drawing is a side view showing an example of the present invention. 1...Exterior thin plate, 2...Polymer adhesive material layer, 3
...substrate.

Claims (1)

[Scope of utility model registration request] A laminate in which a thin exterior plate such as a veneer board, a surface board, or a decorative board and a substrate such as particle board or laminated wood are bonded together with a layer of a polymeric adhesive material having antibacterial properties and chemically bonded with an antibacterial agent.