Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Two-layer imageable composition including non-volatile acid in bottom layer

Inactive Publication Date: 2003-07-10
KODAK POLYCHROME GRAPHICS
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, each of these systems suffers from disadvantages, which include difficulty of controlling the cure rates.
The difficulty of controlling cure rates becomes even more acute if the one or more ingredients of the thermally imageable composition have counter anions that are derived from a volatile acid.
The volatile acid, for example, HF, HCl, HBr or Hl, would then be easily volatilized and lost under the conditions of thermal imaging and subsequent baking, thereby reducing the cure rate.
In any case, however, care must be taken that the substances added do not absorb an excessive proportion of the radiation required for acid generation and thus reduce the crosslinking sensitivity of the composition.
Previous attempts to improve speed and fog control have had deleterious effects on plate performance.
Thus, if one is able to prepare a fast plate, a plate having a poor shelf life is obtained.
Conversely, if a plate having a good shelf life is prepared, a slow plate is obtained.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Two-layer imageable composition including non-volatile acid in bottom layer
  • Two-layer imageable composition including non-volatile acid in bottom layer
  • Two-layer imageable composition including non-volatile acid in bottom layer

Examples

Experimental program
Comparison scheme
Effect test

examples c1 , 1 and 2

Examples C1, 1 and 2

[0139] Coating formulations included solutions of the components described in table 1 in 1-methoxypropan-2-ol / acetone 92:8 (w:w). Plates were prepared by coating the formulations onto the aluminum substrate by means of a whirl coater. The formulation concentrations were selected to provide dry films having a coating weight of 120 mg / ft. The coated plates were dried at 100.degree. C. for 90 seconds. The film weights were measured after thorough air drying over several days.

1 TABLE 1 Example C1 1 2 Component Parts by Weight Resin A 28.2 28.2 28.0 Resin B 48.3 48.3 47.9 Acid Generator A 7.5 7.5 7.4 IR Dye A 8.6 8.6 8.5 Terephthaldehyde 6.5 6.5 6.4 Blue Dye A 0.9 0.9 Blue Dye B 0.9 0.9

Ascertaining Fog Point

[0140] Unimaged plate samples were placed in a heavy duty Wisconsin oven (conveyor speed=2.5 feet / min) starting at a temperature of 275.degree. F. and decreasing by 5.degree. F. intervals. After processing in a Mercury Mark V processor (containing 9005+developer at...

examples c2 and 3

[0149] Coating formulations included solutions of the components described in Table 4 in 1-methoxypropan-2-ol / acetone 92:8 (w:w).

4 TABLE 4 Example C2 3 Component Parts by Weight Resin A 28.6 28.6 Resin B 48.4 48.4 Acid Generator A 7.5 7.5 IR Dye A 7.8 7.8 Terephthaldehyde 6.5 6.5 Blue Dye A 1.2 Blue Dye B 1.2

[0150] Plates were prepared by coating the formulations onto the aluminum substrate by means of a whirl coater. The formulation concentrations were selected to provide dry films having a coating weight of 120 mg / ft. The coated plates were dried at 100.degree. C. for 90 seconds. The film weights were measured after thorough air drying over several days.

Ascertaining Fog Point

[0151] Unimaged plate samples were placed in a heavy duty Wisconsin oven (conveyor speed=2.5 feet / min) starting at a temperature of 275.degree. F. and decreasing by 5.degree. F. intervals.

[0152] After processing in a Mercury Mark V processor (containing 9005+ developer at 25.degree. C., processing speed 740 mm...

examples 4 to 8

[0155] Coating formulations included solutions of the components described in table 6 in 1-methoxypropan-2-ol / acetone 92:8 (w:w). Plates were prepared by coating the formulations onto the aluminum substrate by means of a whirl coater. The formulation concentrations were selected to provide dry films having a coating weight of 120 mg / ft. The coated plates were dried at 100.degree. C. for 90 seconds. The film weights were measured after thorough air drying over several days.

6 TABLE 6 Example 4 5 6 7 8 Component Parts by Weight Resin A 28.48 28.47 28.44 28.42 28.41 Resin B 48.60 48.55 48.51 48.49 48.46 Acid Generator A 7.54 7.53 7.53 7.52 7.52 IR Dye A 7.88 7.87 7.86 7.86 7.85 Terephthaldehyde 6.54 6.53 6.52 6.52 6.52 Blue Dye B 0.96 1.05 1.14 1.19 1.24

Thermal Exposure

[0156] Plate samples were then imaged on the Creo Trendsetter at 55,64, 77,96,129 and 194 mJ / cm.sup.-2, using an internal solid image pattern (100% exposure). They were then pre-heated in the heavy duty Wisconsin oven (co...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Acidityaaaaaaaaaa
Crosslinkableaaaaaaaaaa
Volatilityaaaaaaaaaa
Login to View More

Abstract

The present invention provides an imageable composition, which includes a bottom layer including a first strong, non-volatile acid having a pKa of not more than about 8 and coated thereon a top layer including an acid curable composition, an acid generator, an infrared absorber and optionally a colorant. The present invention further provides an imageable element, which includes a substrate and an imageable composition according to the present invention coated on a surface of the substrate. Also provided is method of producing an imaged element according to the present invention.

Description

[0001] This application is a Continuation-In-Part and claims priority from U.S. application Ser. No. 09 / 933,884, filed Aug. 21, 2001.[0002] 1. FIELD OF THE INVENTION[0003] The present invention relates to an imageable composition, which includes a bottom layer including a first strong, non-volatile acid and coated thereon a top layer including an acid curable composition, an acid generator and an infrared absorber. Preferably, at least one of infrared absorber and colorant has a counter anion derived from a non-volatile acid. More particularly, the present invention relates to a thermally imageable composition in which the top layer further includes a second strong, non-volatile acid.[0004] 2. DESCRIPTION OF THE PRIOR ART[0005] Printing plates having a coating of a thermally imageable composition that includes an acid curable composition and either a "free acid" cure catalyst or a "latent acid" cure catalyst, such as, an acid generator, are known. However, each of these systems suff...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B41C1/10B41M5/36G03F7/00G03F7/004G03F7/016G03F7/021G03F7/038
CPCB41C1/1008G03F7/0045G03F7/016G03F7/021G03F7/0382B41C1/1016B41C2210/262B41C2210/06B41C2210/10B41C2210/14B41C2210/22B41C2210/24B41C2210/26B41C2210/04
Inventor HALEY, NEILKALAMEN, JOHN
Owner KODAK POLYCHROME GRAPHICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com