JPS59145145A - Mat film - 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 Technical Field The present invention relates to a matte film, and more particularly to a matte film that is applied to diazo 2 JJA film, drafting trafting film, image transfer sheet, magnetic film, etc.

Conventional matte film, which has a matte layer on a plastic film support, has particularly high adhesion between the matte layer and the film.
Hardness and solvent resistance are required, and various studies have been made to satisfy these characteristics.

A proposal was made to provide an undercoat layer between the matte layer and the film for the purpose of improving adhesion (Japanese Patent Laid-Open No. 108826/1983).
No. 52-73985, No. 54-43017, No. 54
-97684, etc.). However, the number of steps required to apply the undercoat layer is increased, and other properties are not improved due to peeling.

In addition, matte A whose main component is formaldehyde-based resin
It has been proposed (Japanese Patent Publication No. 49-37585, Japanese Patent Application Laid-Open No. 50-38771, Japanese Patent Publication No. 50-141683, etc.). However, 1° has the disadvantage of generating formaldehyde over time and emitting a bad odor, and none of the matte films proposed so far fully satisfy the above characteristics. Usually, a surface roughening agent (filler) is added to the matte layer in order to make it possible to write on it, but it has been difficult to add it in the required amount because the above characteristics are not sufficient.

Purpose The present invention has been made to solve the above problems.
The purpose is to provide a matte film that has sufficient adhesion, hardness, and solvent resistance even when a large amount of filler is used.

In other words, the matte film of the present invention has a layer containing as main components an acrylic polyol with an oxidation of 5 or less and an aliphatic incyanate on a support.

The acrylic polyol in the present invention is a comonomer of a hydroxy group-containing monomer, an unsaturated acid, and other polymerizable monomers as necessary, and examples of the hydroxy group-containing monomer include hydroxyalkyl (meth)acrylate, N-hydroxy Examples include alkyl (meth)acrylamide and the like.

Examples of unsaturated acids include acrylic acid, methacrylic acid, itaconic acid, α-methylene geltaloic acid, maleic acid, crotonic acid, and nucleic acid anhydrides. Determined by the constituent amount during coalescence. The acid value of the acrylic polyol used in the present invention is 5 or less. If the acid value exceeds 5, the adhesiveness of the support ♂ will not be sufficient. Also, if you cut it too small, the hardness of the coating will decrease, so it is better to cut it to 0.5.
~3.

As other copolymerization components of the acrylic polyol, esters of acrylic or methacrylic acid such as methyl acrylate, methyl methacrylate, butyl acrylate, butyl methacrylate, 2-etherhexyl acrylate, raylyl methacrylate, and cyclohexyl acrylate;
Styrene, α-methylstyrene, β-chlorostyrene,
Styrene derivatives such as P-bromostyrene, organic nitriles such as acrylonitrile, methacrylaterile, methylene geltalonitrile, organic acid vinyl esters such as vinyl acetate, vinyl propionate, vinyl inpropionate, (meth)acrylamide, N- Alkoxyalkyl (
Examples include meth)acrylamide, which is appropriately selected and used depending on the purpose.

Acrylic polyol can be easily obtained by solution polymerizing the above monomer components in a ketone solvent, an aromatic solvent, or an ester solvent, but the molecular weight is 10,000 to 4.
It is preferable to control it to about 0000. 1
If it is less than 0,000, it is disadvantageous in terms of solvent resistance and hardness;
If it exceeds 0,000%, the viscosity of the matte layer coating solution increases, making it unsuitable for mass production.

Preferred aliphatic incyanates include HMD
I (hexamethylene diisocyanate), HMDI derivatives, and adducts thereof. Generally, these incyanates are expensive, so TD (tolylene diisocyanate), MDI (4,4'-diphenylmethane diisocyanate), and their derivatives are often used, but because their adhesive properties are not sufficient, As a coating component for a flexible support in the present invention, it is not ingenious.

The blending ratio of acrylic polyol and aliphatic incyanate is 0.8 to 2.0, preferably i, o to 1.6 in terms of equivalent ratio (NCo10H). If it is less than 0.0, the adhesion, solvent resistance, and stain resistance will be insufficient, and if it exceeds 2.0, the drying properties of the paint will be poor, making it unsuitable in terms of production technology, and the adhesion will also be poor.

The acrylic polyol and aliphatic incyanate combination vehicle can be used as a protective coating for the solid support and can also contain fillers. As the filler, silica powder, glass powder, alumina, titanium oxide, diatomaceous earth, etc. are used.

In addition to the above, paint components include thermoplastic resin components such as acrylic resins, polyester resins, vinyl copolymers such as chloride-vinyl-acetate typical polymers, chloride-vinyl-acetate-maleic acid copolymers, and antistatic agents. 30wt% of the total resin solid content
It can be added within If it exceeds 30 wt%, solvent resistance and stain resistance will deteriorate.

Paint solvents include ketones (e.g. acetone, methyl ethyl ketone, methyl imbutyl ketone, cyclohexanone), esthetics agents such as methyl acetate, ethyl acetate, butyl acetate, ethyl lactate, glycol acetate, monoethyl ether), aromatic hydrocarbons (reli -O such as benzene, toluene, xylene)
Those without H functional groups are preferred, and ketone solvents are more preferred.

This is because the pot life of the liquid is extended due to the masking effect of the ketone on the top liquid type urethane paint.

Examples of the support include polyester film, polysulfone film, polyphenylene oxide film,
Acetate film, polyimide film, polycarbonate film, cellulose ester film, polyamide film, etc., as well as synthetic paper made of these,
Secondary chemical products such as metallized films can also be used.

The thickness of the support and the matte layer may be appropriately determined depending on the purpose of use, but usually the thickness of the support is about 10 to 200 μm, and the thickness of the mat Z is about 5 to 15 μm. Since the present invention has excellent adhesion, properties, and hardness, it can be said that the thickness restrictions are relaxed compared to the past, and the range of applications can be expanded.

Next, an example of synthesis of acrylic polyol will be shown.

Ethyl acrylate 10% 1 (1%
15% 10%Butyl acrylate 15%
1o1 10% 15% acrylic acid 1
% 2 buns 0.5% 5% β-human 0 xyethyl
25%. blood ,. % 25% Lumetaacrylate Styrene 39% 53% 34.5% 35
% The above monomer composition was reacted in a xylene solvent at a temperature of about 90°C for several hours to form the following acrylic polyol (/16
1-A4) was synthesized. (Solid content 50%) Molecular weight 24000 32000 18000 240
00 acid value 2.5 4.8 LO1a0 0H value 48.5 22.0 62.0 49.
Examples using these acrylic polyols are shown below.

Example 1 Acrylic polyol/161 80
Part methyl isobutyl ketone 8
0 parts After ball milling the above composition for 24 hours, 23 parts of Desmodur N-75 (aliphatic incyanate manufactured by Bayer) was added and applied to a 50 μm polyester paste to a thickness of 9 pttL, and heated at 120°C for 1 minute. After drying, curing treatment was performed at 150° C. for 5 minutes to produce a matte film.

Example 2 Acrylic polyol Ma 2 64 parts Dianal na-a4 (acrylic resin manufactured by Mitsubishi Rayon Co., Ltd.) 8 parts f + 04t''''(*i''-'''Ki'y!] h@*)
,.

Thyroid 63 (Silica powder manufactured by Fegushi Davison) 2
6 parts Methyl ethyl ketone 70 parts After dispersing the above composition in a 5-mil hole for 24 hours, 23 parts of Desmodur N-75 was added and coated on both sides of a 75 μm polyester pail under the same conditions as in Example 1 to prepare a matte film. did.

Example 3 Acrylic polyol /163 7
8 parts VMOH (vinyl chloride-maleic acid copolymer resin manufactured by UOO) 4 parts thyroid 72 5 parts thyroid 63 28 parts methyl ethyl ketone 60
1 part toluene 20 parts After dispersing the above composition in a sand mill, Desmodur N-7
59/Im under the same conditions as Example 1.
A matte film was prepared by coating both sides on a polyester base.

Example 4 Acrylic polyol A 1 69 parts Thyroid 72 5 parts Thyroid 63 28 parts Methyl isobutyl ketone 70 parts Shun Desmodur N, which is obtained by dispersing the above composition in a sand mill
-75.20 parts and 5 parts of Coronate L (aromatic isocyanate manufactured by Nippon Polyurethane Co., Ltd.) were added and applied to a 50 μm polyester paste under the same conditions as in Example 1 to prepare a matte film.

Comparative Example 1 VAGH (UCO00 Co., Ltd. Salt Beetle (fat) 8 parts Crystallite FM-145 parts Methyl cellosolve 90 parts After dispersing the above composition in a ball mill for 24 hours, Kneepan 60R (Mitsui Toatsu Chemical Co., Ltd. melamine resin) 20 parts were added and applied to 50/IF! polyester paste under the same conditions as in Example 1 to produce a matte film.

Comparative Example 2 Acrylic polyol 1 was replaced with acrylic polyol/164
A matte film was produced in exactly the same manner as in Example 1 except that the amount was changed to 80 parts.

Comparative Example 3 Acrylic polyol A1 was changed to acrylic polyol/l64
A matte film was prepared in exactly the same manner as in Example 1, except that 20 parts of Desmodur N-75fk (Coronet) L was used instead of 80 parts.

We conducted various characteristic tests on each matte film,
The results are shown in the table below.

Adhesiveness: Rub the film 10 times and peel off with Sellotape 5
(Good) ~ 1 (Bad) Pencil hardness: Measured by JIS5401 pencil hardness test Solvent resistance: Number of rub-offs with cotton impregnated with acetone Hono-β phosphorus odor: Continuously passing paper through Ricobee FW610 on the back side of the ester film The images were coated on top of each other and stored in an atmosphere of 50°C and 80°RH for 3 days, and then diazo-copied. Changes in the moisture content of the resulting images were measured using a Macbeth transmission densitometer (green filter). As is clear from the above explanation, by using a specific acrylic polyol and aliphatic incyanate as the main components, adhesiveness, hardness, solvent resistance, etc. can all be satisfied, and sufficient filler can be added. I can do it.

Claims (1)

[Claims] 1. A matte film in which a layer mainly composed of an acrylic polyol with an oxidation of 5 or less and an aliphatic incyanate is provided on a support.