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Oxime ester compound, photopolymerizable composition and color filter utilizing the same

A compound and oxime ester technology, applied in the field of photopolymerizable compositions for color filters and photopolymerizable compositions, can solve the problems of difficulty in practical use, reduced adhesion, and difficulty in realizing resin BM, etc.

Active Publication Date: 2007-02-28
MITSUBISHI RAYON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the method is complicated and the adhesion will be reduced due to the accumulation of twists when the film shrinks, it is difficult to use this resin practically.
Therefore, there is a problem that it is obviously contradictory to carry out the photoreaction under light-shielding conditions that originally conflict with the photoreaction, so it is difficult to realize a practical resin BM
However, the image characteristics required for resin BM, that is, sensitivity and resolution, cannot be improved merely by replacing the initiator (such as bisimidazole or triazine initiator) used for conventional resin BM with an oxime compound.

Method used

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  • Oxime ester compound, photopolymerizable composition and color filter utilizing the same
  • Oxime ester compound, photopolymerizable composition and color filter utilizing the same
  • Oxime ester compound, photopolymerizable composition and color filter utilizing the same

Examples

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preparation example Construction

[0271] The production method of the photopolymerizable composition of the present invention is explained below. In the present invention, the coloring material is generally preferably subjected to dispersion treatment using, for example, a paint conditioner, a sand mill, a ball mill, a roll mill, a stone mill, a jet mill or a homogenizer. The coloring material is formed into fine particles by the dispersion treatment, so that the coatability of the resist will be improved. Also, when a black coloring material is used as a coloring material, this treatment will promote improvement in light-shielding ability.

[0272] It is preferable to perform the dispersion treatment in a system in which a black coloring material and a solvent or an organic binder having a dispersing function are used in combination, or further the above-mentioned pigment dispersant is used in combination. It is particularly preferable to use a polymeric dispersant to obtain excellent dispersion stability ov...

preparation example 1

[0316] Preparation of Polymer Dispersant Solution

[0317] 32 g of trimer of toluene diisocyanate (produced by Mitsubishi Chemical Corporation, MytecGP750A, resin solid content 50% by weight, butyl acetate solution) and 0.02 g of dibutyltin dilaurate as catalyst were diluted and dissolved in 47 g of propylene glycol monomethyl ether acetate (PGMEA). Under stirring, 14.4 g of polyethylene glycol having a number average molecular weight of 1,000 with a methoxy group at one end (manufactured by NOF Corporation, UNIOX M-1000) and 9.6 g of polyethylene glycol with a number average molecular weight of 1,000 were added dropwise thereto. A mixture of polypropylene glycol (manufactured by Sanyo Chemical Industry Co., Ltd., SANNIX PP-1000), followed by further reaction at 70° C. for 3 hours. Then, 1 g of N,N-dimethylamino-1,3-propanediamine was added thereto, followed by further reaction at 40° C. for 1 hour. It was found that the thus obtained solution containing the polymer dispersa...

preparation example 2

[0319] Preparation of organic binders

[0320]200g of o-cresol novolac epoxy resin with an epoxy equivalent of 200g / eq and a softening point of 65°C, 72g of acrylic acid, 0.2g of p-methoxyphenol, 0.2g of dodecyltrimethylammonium chloride and 272g of PGMEA was put into a flask and reacted at a temperature of 100° C. for 8 hours (1 equivalent of acrylic acid reacted with 1 equivalent of epoxy group). Thereto was further added 42 g of tetrahydrophthalic anhydride, followed by reaction at 80° C. for 3 hours. The reaction solution was reprecipitated in water and dried in vacuum to obtain a carboxyl novolak epoxy acrylate resin. Neutralization titration was carried out with KOH, and the acid value of the resin was measured to be 50 mgKOH / g.

[0321] Dispersion of carbon black

[0322] According to the ratio of 50 parts by weight of carbon black (produced by Mitsubishi Chemical Corporation, MA-220) and 5 parts by weight of the polymer dispersant obtained in Preparation Example 1 f...

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Abstract

An oxime ester compound of specified structure. In particular, in a photopolymerizable composition comprising (a) black color material, (b) organic binder and (c) photopolymerization initiator, the oxime ester compound constitutes the component (c). The oxime ester compound can be used as a highly sensitive photopolymerization initiator. The photopolymerizable composition containing the oxime ester compound in the form of a thin film excels in sensitivity and resolving power while exhibiting high light shielding capability, so that it is capable of forming a resin black matrix (BM) of low cost but high quality. The color filter utilizing this resin BM excels in precision, flatness and durability, so that it is capable of enhancing the display quality of liquid crystal device. Moreover, the production process and color filter per se do not involve any hazardous substances, so that the danger to human body can be reduced and environmental safety can be enhanced. Application thereof can be made to usages in which no color material is used, such as photospacer and rib (liquid crystal divided-alignment protrusion).

Description

technical field [0001] The present invention relates to an oxime ester compound used as a photopolymerization initiator and a photopolymerizable composition containing the oxime ester compound. More specifically, the present invention is effective for photopolymerizable compositions for color filters used in the manufacture of, for example, color televisions, liquid crystal displays, Optical color filters for solid-state image sensors, cameras, etc.; The present invention relates to a photopolymerizable composition for color filters, which is suitable for producing a black matrix (black matrix, hereinafter abbreviated as BM); the present invention also relates to a color filter of high precision and high light-shielding resin BM. [0002] And, the oxime ester compound of the present invention is a high-sensitivity photopolymerization initiator, so its use is not limited to BM, and it can also be used for transparent photosensitive compositions that do not use coloring materia...

Claims

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Application Information

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IPC IPC(8): C07D209/86G03F7/031G02B5/20C07D209/94G03F7/00
CPCC07D209/86G03F7/0007C07D209/94G03F7/031C09B55/003C09B55/006
Inventor 水上润二龟山泰弘浦野年由
Owner MITSUBISHI RAYON CO LTD
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