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Composition curable with actinic energy ray and use thereof

a technology of actinic energy rays and curable compositions, applied in the field of actinic energy raycurable compositions, can solve the problems of limiting the application of ultraviolet curable compositions, not meeting the scratch resistance of cured products, etc., and achieve excellent scratch resistan

Inactive Publication Date: 2005-07-07
NATOCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005] An object of the present invention is to provide an actinic energy ray-curable composition capable of forming a cured product having excellent scratch resistance.

Problems solved by technology

However, the scratch resistance of the cured product is not necessarily satisfied in some applications.
This limits the applications for the ultraviolet curable composition.

Method used

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  • Composition curable with actinic energy ray and use thereof
  • Composition curable with actinic energy ray and use thereof
  • Composition curable with actinic energy ray and use thereof

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0011] First, an actinic energy ray-curable composition according to a first embodiment of the present invention is described.

[0012] The actinic energy ray-curable composition according to the first embodiment contains two or more kinds of urethane(meth)acrylates different from one another in the number of repetitions of a caprolactone unit per one residue of a polycaprolactone-modified alkyl(meth)acrylate.

[0013] The average number of repetitions per one molecule of the urethane(meth)acrylate relative to the number of repetitions of the caprolactone unit per one residue of the polycaprolactone-modified alkyl(meth)acrylate is preferably in the range of from 1 to 5, more preferably in the range of from 1 to 2.5. The maximum difference in the number of repetitions of the caprolactone unit per one residue of the polycaprolactone-modified alkyl(meth)acrylate between two kinds of the urethane(meth)acrylates is preferably 9 or less, more preferably in the range of from 4 to 9.

[0014] Eac...

second embodiment

[0035] Next, an actinic energy ray-curable composition according to a second embodiment is described mainly with respect to points differing from the actinic energy ray-curable composition according to the first embodiment.

[0036] The actinic energy ray-curable composition according to the second embodiment contains a urethane(meth)acrylate obtained by reacting an organic isocyanate with two or more kinds of polycaprolactone-modified alkyl(meth)acrylates different from each other in the number of repetitions of a caprolactone unit per one molecule.

[0037] The average of the number of repetitions of the caprolactone unit per one molecule of the polycaprolactone-modified alkyl(meth)acrylate is preferably in a range of from 1 to 5, more preferably in a range of from 1 to 2.5. The maximum difference in the number of repetitions of the caprolactone unit between two kinds of the polycaprolactone-modified alkyl(meth)acrylates is preferably 9 or less, more preferably in a range of from 4 to...

third embodiment

[0043] Next, an actinic energy ray-curable composition according to a third embodiment is described mainly with respect to points differing from the actinic energy ray-curable compositions according to the first and second embodiments.

[0044] The actinic energy ray-curable composition according to the third embodiment contains a urethane(meth)acrylate obtained by reacting an organic isocyanate with a polycaprolactone-modified alkyl(meth)acrylate, and a urethane (meth)acrylate obtained by reacting an organic isocyanate with a hydroxyalkyl(meth)acrylate.

[0045] Specific examples of the hydroxyalkyl(meth)acrylate include a compound represented by the following general formula (5) such as hydroxyethyl(meth)acrylate, hydroxypropyl (meth)acrylate, and hydroxybutyl(meth)acrylate.

[0046] R represents H or CH3 and 1 is an integer of 1 to 10.

[0047] When generically naming the polycaprolactone-modified alkyl(meth)acrylate and the hydroxyalkyl(meth)acrylate as a (meth)acrylate monomer, the hy...

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Abstract

In a cured product having a thickness of 60 μm obtained from an actinic energy ray-curable composition of the present invention, when a scratch mark is made at a vertical load of 235 mN using a diamond indenter with a tip diameter of 15 μm, the scratch mark is repaired by a self-repairing ability under an atmosphere at 25° C. and at a relative humidity of 50%. Therefore, the actinic energy ray-curable composition is useful as coating agents or paints for products where scratch resistance is required.

Description

TECHNICAL FIELD [0001] The present invention relates to an actinic energy ray-curable composition useful as paints or coating agents for products where scratch resistance is required. BACKGROUND ART [0002] In Japanese Laid-Open Patent Publication No. 2001-2744, the present inventors have proposed an ultraviolet curable composition containing an ultraviolet curable urethane (meth)acrylate oligomer and a photoinitiator. The oligomer is obtained by reacting an isocyanate prepolymer compound having three or more isocyanate groups in one molecule with a polycaprolactone-modified hydroxyethyl(meth)acrylate. [0003] In a cured product of the ultraviolet curable composition, scratches generated on the surface of the product can be repaired by self-repairing ability. Therefore, the cured product has scratch resistance. Accordingly, the ultraviolet curable composition is useful as paints or coating agents for products where scratch resistance is required. [0004] However, the scratch resistance...

Claims

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Application Information

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IPC IPC(8): C08F290/06C08G18/28C08G18/67C08G18/79C08G18/80C08J3/28C08L75/16C09D175/16G02B1/10
CPCC08F283/006C08F290/06G02B1/105C08F290/067C08F290/14C08F290/147C08G18/2825C08G18/283C08G18/6725C08G18/7831C08G18/792C08G18/8025C08J3/28C08L75/16C09D175/16C08L2666/20G02B1/14C08F299/06C08J5/18G02B1/10
Inventor HARA, MASAHIROOHNO, TOMIHISAKAWAKAMI, SUSUMU
Owner NATOCO
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