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Coating agent and laminate

A coating agent and crosslinking agent technology, applied in the field of coating agents and laminates, can solve the problems of insufficient adhesion and chemical resistance, insufficient adhesion of cured coatings, etc. Achieves excellent chemical resistance and heat and humidity resistance

Active Publication Date: 2016-08-03
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even if an undercoat layer containing an acrylic resin is provided, the adhesion between the polyester film and the cured coating film of the active energy ray-curable composition is not sufficient.
[0005] In addition, a layer using a urethane resin as a primer layer has a problem in that although the adhesiveness with the cured coating film of the active energy ray-curable composition is sufficient, the adhesiveness and resistance after the heat and humidity resistance test are insufficient. Chemical properties do not exhibit sufficient performance

Method used

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  • Coating agent and laminate
  • Coating agent and laminate
  • Coating agent and laminate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0099] Next, the present invention will be specifically described by way of examples and comparative examples.

Synthetic example 1

[0100] (Synthesis Example 1: Synthesis of Aromatic Polyester Polyol (1))

[0101] While introducing nitrogen gas into a reaction container equipped with a thermometer, a nitrogen introduction pipe, and a stirrer, 27.6 parts by mass of isophthalic acid, 27.6 parts by mass of terephthalic acid, 19.9 parts by mass of diethylene glycol, and 0.03 parts by mass of dibutyltin oxide were added Parts, carry out polycondensation reaction at 230°C for 24 hours until the acid value is 1 or less at 180-230°C to obtain aromatic polyester polyol (1) [acid value 0.6, hydroxyl value 50.0, aromatic ring concentration 4.77mol / Kg ].

manufacture example 1

[0102] (Production example 1: Synthesis of vinyl ester resin (1))

[0103] A cresol novolac type epoxy resin ("EPICLONN-673-80M" manufactured by DIC Corporation, solid content epoxy equivalent: 209 g / eq., non-volatile content: 80% by mass, solvent: methyl ethyl ketone) was charged into the reaction vessel. 46.7 parts by mass, 13.3 parts by mass of acrylic acid, 0.08 parts by mass of p-methoxyphenol, and 13.3 parts by mass of methyl ethyl ketone were stirred and mixed uniformly. Then, 0.37 parts by mass of triphenylphosphine was added, and the reaction was carried out at a reaction temperature of 80° C. until the acid value was 1.5 or less to obtain a solution having a nonvolatile content of vinyl ester resin (1) of 75% by mass.

[0104] Table 1 shows the raw materials of the vinyl ester resin (1) synthesized in Production Example 1.

[0105] [Table 1]

[0106]

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PUM

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Abstract

The present invention provides a coating agent comprising: (D) an aqueous resin composition produced by dispersing both (A) a vinyl ester resin and (B) a urethane resin having an aromatic ring in (C) an aqueous medium; and (E) a carbodiimide-type cross-linking agent. In the coating agent, the vinyl ester resin (A) is produced by reacting (a1) at least one epoxy resin selected from the group consisting of a novolac-type epoxy resin and a bisphenol-type epoxy resin with (a2) a compound having an acid group and a polymerizable unsaturated group, and the urethane resin (B) is produced by reacting (b1) a polyol comprising (b1-1) a polyol having an aromatic ring and (b1-2) a polyol having a hydrophilic group with (b2) a polyisocyanate. The coating agent according to the present invention enables the formation of a primer layer which can improve the adhesion between a base material and a cured coating film made from an active energy ray-curable composition and which has excellent chemical resistance and wet heat resistance.

Description

technical field [0001] The present invention relates to a coating agent that can be used as a primer for improving the adhesion between a base material and the cured coating film when forming a cured coating film of an active energy ray-curable composition on the surface of a base material, and laminated body. Background technique [0002] In recent years, the application of the aqueous urethane resin composition to a film or sheet for optical use has been studied. As said optical use, a liquid crystal display, a touch panel, etc. are mentioned specifically. Display devices such as liquid crystal displays are generally constructed by laminating a plurality of optical films having various functions in order to display clear images. Examples of the optical film include antireflection films, retardation films, and prism lens sheets. [0003] A polyester film, especially a polyethylene terephthalate (PET) film is used as a base material of these optical films because of excell...

Claims

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Application Information

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IPC IPC(8): C09D175/04B32B27/30B32B27/40C08J7/04C09D4/00C09D4/06C09D5/00C09D5/02C09D7/12C09D163/10C09D175/06C08J7/043
CPCC09D4/00C09D4/06C09D163/10C09D175/04C08G18/6659C08G18/755C08G18/797C08G18/0823C08G18/348C08G18/4213C08J2475/14C08J7/123C08J2367/02C08J2433/08C08J2463/10C09D5/006C09D5/022C09D7/40C08G59/4042C08J7/043C08G18/12C08G18/282C09D175/06C08L75/04C08J7/04C09D7/65C08L63/10C08G18/3203C08G18/3215C08G18/42C08G18/66C08J2475/04
Inventor 小柳达史北田满
Owner DIC CORP
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