Developer for use with carbonless copy paper and photo imaging system

a technology of carbonless copy paper and developer, applied in the field of color developer composition, can solve the problems of fading of the image, discoloration is a very undesirable attribute, and resins are somewhat colored materials,

Inactive Publication Date: 2002-02-28
RENTECH INC
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, phenolic resins are somewhat colored materials and become even more colored as they are exposed to ambient conditions.
Such discoloration is a very undesirable attribute in imaging systems where aesthetic appearance is of extreme importance.
Fading of the image when exposed to extreme temperatures and humidity is also an undesirable trait of the currently developer materials.

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

Examples

Experimental program
Comparison scheme
Effect test

example 2

[0027] Molecular Sieve

[0028] 20.0 g of a C.sub.16H.sub.33(CH.sub.3).sub.3NCl / OH solution (prepared as in Example #1) was mixed with 0.42 g of NaAlO.sub.2. Then 10.0 g of a 25% tetramethylammoniumsilicate solution (Aldrich) was added to the mixture. This addition was followed by 2.5 g of fumed silica (Aldrich). The resulting mixture was placed in a 125 mL closed Parr Reactor and heated for 24 hours at 120.degree. C. The mixture was then filtered and washed with water. The solid was dried at 120 .degree. C. The dried solid was then treated with a 10% HNO.sub.3 solution over night. Following the acid treatment the sample was filtered and washed with water and dried at 120.degree. C. A heat treatment of the material was then carried out by heating the sample in a tube furnace under N.sub.2 flow at 450.degree. C. followed by heating in air for 3 hours. The sample was then transferred to an oven and was heated at 500.degree. C. in air for 8 hrs. The sample was tested via the spot method a...

example 3

[0029] Molecular Sieve

[0030] 20.0 g of a C16H.sub.33(CH.sub.3).sub.3NCl / OH solution (prepared as in Example #1) was mixed with 0.68 g of ZnCl.sub.2, 10.0 g of a 25% tetramethylammoniumsilicate solution (Aldrich), 2.5 g of fumed silica (Aldrich) and 0.42 g LiOH.H.sub.2O. This mixture was then placed in a closed 125 ml Parr reactor and heated at 120.degree. C. for 24 hours. The mixture was filtered and the white solid obtained was washed with water and ethanol. The product was then dried at 120.degree. C. The sample was then added to 100 ml of a 10% HNO.sub.3 solution and stirred at room temperature over night. The mixture was filtered and the solid washed with water. Drying at 120.degree. C. was the next process step. Finally the sample was heated under N.sub.2 flow in a tube furnace at 500.degree. C. for one hour, followed by heating in air at 500.degree. C. for 10 hours. The sample was tested via the spot method and exhibited color development.

example 4

[0031] Molecular Sieve

[0032] 60.0 g of a C.sub.16H.sub.33(CH.sub.3).sub.3NCl / OH solution (prepared as in Example #1) was mixed with 3.30 g Na.sub.2SnO.sub.3, 30.0 g of a 25% tetramethylammoniumsilicate solution (Aldrich) and 7.5 g of fumed silica (Aldrich). The mixture was placed in a closed 300 mL Parr reactor and heated at 120.degree. C. for 39 hours. The resulting mixture was filtered and the solid was washed with water and ethanol. The solid was dried at 120.degree. C. and then treated with 400ml of a 20% HNO.sub.3 solution for 20 hours. The mixture was filtered and the solid was washed with water and ethanol. The sample was dried at 120.degree. C. A heat treatment consisting of heating under N.sub.2 at 500.degree. C. for 3 hours followed by heating in air at 500.degree. C. for 14 hours completed the material preparation. The sample was tested via the spot method and exhibited color development.

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
temperatureaaaaaaaaaa
molar ratiosaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

An electron accepting developer useful for producing visible images by reaction with an electron donor in carbonless paper and photo- imaging systems, the developer comprising an acid-treated, water insoluble alkali metal-modified, inorganic oxide or an acid-treated molecular sieve.

Description

BACKGROUND OF INVENTION[0001] The present invention relates to a color developer composition which is designed to be used with recording systems which employ colorless electron donating materials to form images.[0002] Recording materials utilizing developer materials to produce colored images from colorless or substantially colorless electron donating materials are well-known. Specific examples of such recording materials include pressure sensitive carbonless copying paper, heat-sensitive recording paper, electrothermographic recording paper, Cycolor.RTM. photographic materials and the like. They are described in more detail in U.S. Pat. Nos. 2,712,507; 2,730,456; 2,730,457; 3,418,250; 3,432,327; 3,981,821; 3,993,831; 3,996,156; 3,996,405 and 4,000,087. These papers include a developer sheet (also referred to as a CF (coated front) sheet) comprising a substrate coated with an electron acceptor which reacts with a leuco dye transferred to the surface of the developer sheet to form an...

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
Patent Type & Authority Applications(United States)
IPC IPC(8): B41M5/333C01B13/14
CPCB41M5/3338C01B13/14
Inventor SHACKLE, DALE R.CHALONER-GILL, BENJAMIN
Owner RENTECH INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap