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Heat sensitive composition and use thereof

A heat-sensitive composition and composition technology, applied in the direction of photosensitive materials, optics, and optomechanical equipment used in optomechanical equipment, can solve the problems of shortening the service life of printing plates, eroding image areas, etc.

Active Publication Date: 2014-07-16
ETERNAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the fountain solution contains solvent, it will slowly erode the image area and shorten the service life of the printing plate. Therefore, how to make the heat-sensitive composition have solvent resistance to the fountain solution has become an important issue in offset printing technology, but now How to improve the solvent resistance of the composition to the fountain solution is seldom discussed in the prior art

Method used

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  • Heat sensitive composition and use thereof

Examples

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example

[0052] Abbreviations used below are defined as follows:

[0053] GPC: gel permeation chromatography (Gel permeation chromatography)

[0054] DSC: Differential scanning calorimetry

preparation example 1

[0055] Preparation Example 1: (meth)acrylate

[0056]

[0057] Oil phase: 50g methyl methacrylate (Chimei Petrochemical), 10g methacrylic acid (Chimei Petrochemical), 40g lauryl methacrylate (Chimei Petrochemical), 20 grams of benzoyl peroxide (AKZO) and 1 gram of mercaptan (Shanghai Longsheng Chemical Company), and water phase: 200 grams of pure water and 0.6 grams of PVA (Changchun BP-17) are mixed in a ratio of 1:2, dispersed in the reactor at a stirring speed of 160 rpm, and then heated to 80 ° C for The polymerization reaction can be completed after maintaining the temperature for 3 hours, and finally the solid is washed, dehydrated, and dried to obtain 95 g of acrylic solid. (Weight average molecular weight measured by GPC (model: Waters2414RI): 70,000; Tg = 34°C measured by DSC (model: TAQ-100)

Embodiment 1

[0063] A coating composition solution and an aluminum substrate were produced as in Comparative Example 1. In 91.0 grams of 1-methoxyl-2-propanol, dissolve 9.00 grams of Novolak EP6050 (Asahi organic chemicals industry), 0.50 grams of infrared radiation absorbing dye HCD23 (Hayashibara Bio Chemical laboratories (Hayashibara biochemical laboratories)), 0.50 g of tris(p-dimethylaminophenyl) methane (Ultrachem) and 6.00 g of cellulose acetate butyrate (CAB) (Eastman chemical) ) to make a coating composition solution.

[0064] Further testing separately, the weight loss after imaging treatment in the non-exposed area is 0.1g / m 2 , lower than the allowable range (2 ), 1.5g / m remains after developing the exposed area 2 , higher than the allowable range (2 ). And after soaking the above-mentioned substrate coated with the thermosensitive composition in 50% isopropanol aqueous solution for 1 hour, the detection photosensitive layer remains about 1.7g / m 2 . Comparing Example 1, it...

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Abstract

The present invention is directed to a heat sensitive composition comprising (a) a novolak resin, (b) a dissolution inhibitor, (c) an infrared radiation absorbing compound, and (d) a solvent resistant additive. The inventive heat sensitive composition having excellent solvent resistance can be applied to heat sensitive offset printing to improve process rate and tolerance in printing, and exhibits excellent developing property and alkali tolerance.

Description

[0001] This application is a divisional application of an invention patent application with an application date of January 18, 2012, an application number of 201210020785.X, and an invention title of "Thermal Sensitive Composition and Its Use". technical field [0002] The present invention relates to a heat-sensitive composition, especially a heat-sensitive coating composition that can be used in heat-sensitive offset printing, and a method for producing images using the heat-sensitive composition. Background technique [0003] The known printing techniques are mainly divided into four main groups of methods: gravure printing, letterpress printing, screen printing and offset printing. [0004] The above-mentioned offset printing is a kind of indirect printing. The ink is coated by a roller and then transferred to the substrate through an intermediary blanket (blanket), that is, the surface such as paper or cloth. The principle of inking is to use the principle of immiscibi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/004G03F7/039
Inventor 吴伊旎陈顺凉
Owner ETERNAL MATERIALS CO LTD
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