JPS58158248A - Manufacture of polyester decorative board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a polyester decorative laminate in which the adhesion between a vinyl chloride resin sheet printed with colors and textures and an unsaturated polyester decorative laminate material is improved.

PVC resin sheets are preferable as decorative materials for decorative boards because they can print more realistically and aesthetically than decorative paper, but PVC X resin sheets have the disadvantage of being soft and easily damaged. There is.

Therefore, it has been proposed that FTik unsaturated polyester resin paint is applied to the surface of a vinyl chloride resin sheet and cured to improve the scratch resistance and give the sheet a deep and elegant appearance.

However, even if a vinyl chloride resin sheet is attached to a decorative board base material such as plywood or particle board, and an unsaturated polyester resin paint is simply applied to the surface and cured to form a polyester sheet, the vinyl chloride resin 1 due to poor adhesion between the sheet and unsaturated polyester resin paint.
kJiIl peeling occurs;

Therefore, conventionally, a vinyl chloride resin sheet is pasted on the decorative laminate base material, and then a layer of resin with good adhesion to the sheet is attached to the surface of the sheet.
A polyester decorative board is manufactured by applying a second primer, then a second primer that has adhesion to the primary primer and unsaturated polyester resin paint, and finally applying and curing the unsaturated polyester resin paint. was. Conventionally, 21 layers of primer were coated in layers in this way, which not only complicated the production process and production equipment, but also required a large amount of primer. As a result, production costs had to go up.

The present inventors conducted intensive research to improve the conventional method and completed the present invention.

To explain this based on drawings showing embodiments of the present invention, the first step is to attach a vinyl chloride resin sheet (2) printed with colors, patterns, etc. using an adhesive to a decorative board base material (1). Then, a transparent primer consisting of a partially saponified vinyl chloride-vinyl acetate copolymer, a hydroxyl group-containing polyester resin, and a polyisocyanate compound is applied to the printed surface of the sheet (2), and semi-cured or hardened. This is a method for manufacturing a polyester decorative board, which comprises a second step of applying a transparent unsaturated polyester resin paint (41) to the armpit primer (3) surface and curing it.

The decorative laminate base material (1) in the present invention is fiberboard, veneer plywood, hardboard, particle board, etc., and the vinyl chloride resin sheet (2) is the surface of the base material when adhered to the decorative laminate base material (1). It is desirable to print colors, patterns, etc. without leaving transparent parts so that they cannot be seen through.

Decorative board base material (1) and vinyl chloride W printed with colors, patterns, etc.
For adhesion to (2), a commercially available adhesive for vinyl chloride resin sheets, ie, an ethylene-vinyl acetate copolymer resin emulsion or an epoxy resin adhesive may be appropriately used.

Primer (3) in the present invention is prepared by reacting a polyisocyanate compound with a mixture of a partially saponified vinyl chloride-vinyl acetate copolymer and a hydroxyl group-containing polyester resin. Hydroxyl group-containing polyester resins are produced by reacting polybasic acids such as maleic acid, adipic acid, and phthalic acid with polyhydric alcohols such as ethylene glycol, propylene glycol, phthalene gelicol, trimethylolpropane, hexanetriol, and trimethylolethane. The obtained material can be used as appropriate. Further, as the polyincyanate compound, an aromatic polyisocyanate such as an adduct of 5 mol of toluene diisocyanate and 1 mol of trimethylolpropane, a trimer of toluene diisocyanate, or N, N'.

There are aliphatic polyinocyanates such as Hl-)di(6-isocyanatehexyl)biuret, and in the present invention, these can be used alone or in an appropriate combination.

As mentioned above, the primer (3) in the present invention is formed by reacting a polyisocyanate compound with a mixture of a partially saponified vinyl chloride-vinyl acetate copolymer and a hydroxyl group-containing polyester resin. Since (2) and primer (3) adhere well, K requires a certain amount of time, and the primer (3)
If the unsaturated polyester resin paint (41) is applied after the reaction in step 3) has progressed too much, the two will no longer adhere to each other.

Due to friction, I replaced the primer (3) with the vinyl chloride sheet (2).
In order to make K adhere closely to both the sheet (2) and the unsaturated polyester resin paint (4), there is a time limit between applying the primer (3) to the sheet (2) and applying the paint (4). The time depends on the reaction rate of primer (3).

Therefore, if the reaction rate of primer (3) can be adjusted, the most reasonable time range can be determined depending on the production line of the decorative laminate, the room temperature, etc. This point is effective because it can be adjusted freely by selecting the primer (lead-powdered polyisocyanate compound) in the present invention.

That is, the primer (3) in the present invention can be reacted by using, for example, a trimer of toluene diisocyanate as a polyisocyanate compound to be reacted with a mixture of partially saponified vinyl chloride-vinyl acetate copolymer and hydroxyl group-containing polyester 11 fat. The speed is extremely fast, and
For example, if an adduct of toluene diisocyanate and trimethylolpropane is used, the reaction rate will be slow, so in order to carry out the present invention more effectively, K should be a polyisocyanate compound with a fast reaction rate, depending on the speed of the wheat flour line, room temperature, etc. The reaction rate should be adjusted by appropriately blending the polyisocyanate compound with a slow reaction rate.

Further, as the unsaturated polyester resin paint (4) as a decorative surface protective material in the present invention, commercially available paints for decorative boards may be used as appropriate, and the coating method may be either a film method or a flow coater method. Can be implemented.

[Examples 1 to 5] After adhering a printed vinyl chloride resin sheet with α09% thickness to 2.7 thick, ■ type, 6-ply plywood with an ethylene-vinyl acetate adhesive, a transparent sheet with the composition shown in Table 3 was attached. After applying a primer at a ratio of 409/lN and semi-curing or curing, a transparent unsaturated polyester resin paint of 180/lN is applied.
1/u'' was coated and cured using the vinylon film method to obtain a polyester decorative board.

*Table 1 shows a blending example of a mixture of a partially saponified vinyl chloride-vinyl acetate copolymer and a hydroxyl group-containing polyester resin (UF Sealer <530AW, manufactured by Dainippon Ink & Chemicals Co., Ltd.).

*Table 2 shows formulation examples using TDI trimer and adducts of TDI and TMP as polyisocyanate compounds.

*Table 3. UF Sealer 650AW in Table t and Table 2. The optimum time range from applying the primer using the combination of polyisocyanate compounds to applying the unsaturated polyester resin paint is shown for each room temperature and each example.

Table 1

[Brief explanation of drawings]

The drawing shows a cross section of a polyester decorative board manufactured by the method of the present invention. 1-1111 decorative board base material, 2-------monovinyl chloride resin sheet 5-------climber, 4-------
- Monounsaturated polyester resin paint Figure J

Claims (1)

[Claims] (?JIJE #(1) The first step of gluing the vinyl chloride mechanical sheet (2) printed with colors and patterns using K adhesive, and the vinyl chloride-vinyl acetate adhesive on the printed image of the cough sheet (2). A transparent primer (3) made of a partially saponified copolymer, a hydroxyl group-containing polyester resin, and a polyisocyanate compound is applied and semi-cured or hardened, and a transparent unsaturated primer (8) is applied to the box. A method for manufacturing a polyester decorative board comprising a first earthworker for applying and curing a polyester resin paint (4).