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

Synthetic method of isoindoline yellow pigment

A technology of indoline yellow and isoindoline is applied in the new synthesis technology field of isoindoline yellow pigment, which can solve the problems of difficult recovery, high recovery cost and high price, and achieves convenient industrial production, cost reduction and post-processing. Difficult to deal with and the effect of less environmental pollution

Inactive Publication Date: 2013-04-03
CINIC CHEM SHANGHAI
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, isoindoline pigments are not diverse enough in terms of variety and structure
Moreover, most of the patent documents use organic acids as catalysts for reaction, which has the disadvantages of high price, large dosage, difficult recovery and high recovery cost.

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
  • Synthetic method of isoindoline yellow pigment
  • Synthetic method of isoindoline yellow pigment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 3500 g of methanol, 1120 g of phosphoric acid with a weight concentration of 20% in the reaction kettle, then add 256 g (2 moles) of barbituric acid and 190 g (1 mole) of 5-nitro-1,3-diiminoisoindole morphine, heated to 70°C, stirred for 4 hours, filtered, washed with 2000 g of hot water at 80°C, and dried at 110°C for 10 hours to obtain 313.5 g of the yellow pigment represented by formula (1), with a yield of 76%. in:

[0022] R 1 for H, R 2 for NO 2 , R 3 for H, R 4 for H, R 5 for H;

[0023] Wherein: the weight concentration of barbituric acid is 5.05%; The weight concentration of 5-nitro-1,3-diiminoisoindoline is 3.75%; The mol ratio of phosphoric acid and barbituric acid is: phosphoric acid: barbituric acid Bituric acid=1.14:1.

Embodiment 2

[0025] Add 3500 g of methanol, 356 g of phosphoric acid with a weight concentration of 20% in the reaction kettle, then add 256 g (2 moles) of barbituric acid and 190 g (1 mole) of 5-nitro-1,3-diiminoisoindole Phenyl, 20°C, stirred for 16h, filtered, washed with 2000g of hot water at 80°C, and dried at 110°C for 10h to obtain 294.0g of yellow pigment with a yield of 71.4%.

[0026] R 1 for H, R 2 for NO 2 , R 3 for H, R 4 for H, R 5 for H;

[0027] Wherein, the weight concentration of barbituric acid is 5.95%; The weight concentration of 5-nitro-1,3-diiminoisoindoline is 4.42%; The mol ratio of phosphoric acid and barbituric acid is: phosphoric acid: barbituric acid Bituric acid=0.36:1.

Embodiment 3

[0029] With the sulfuric acid of 560g weight concentration 20% the phosphoric acid of replacing 1237g20%, repeat embodiment 1, yield 73%. R 1 for H, R 2 for NO 2 , R 3 for H, R 4 for H, R 5 for H;

[0030] Wherein, the weight concentration of barbituric acid is 5.68%; The weight concentration of 5-nitro-1,3-diiminoisoindoline is 4.22%; The mol ratio of sulfuric acid and barbituric acid is: sulfuric acid: barbituric acid Bituric acid=0.57:1.

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

No PUM Login to View More

Abstract

The invention discloses a synthetic method of an isoindoline yellow pigment. The synthetic method comprises the following steps: adding barbituric acid and 1,3-diimino isoindoline into an inorganic acid methanol solution to react, and then collecting the isoindoline yellow pigment from a reaction product. According to method disclosed by the invention, various isoindoline pigments with different molecular structures can be synthesized; the awkward situation of scarce variety of the existing isoindoline pigments is overcome; isoindoline pigment family is expended and extended; use of an organic acid is avoided in the synthetic method; the cost and post-treatment difficulty are effectively reduced; and the synthetic method is small in environmental pollution and convenient to industrially produce.

Description

technical field [0001] The invention relates to a new synthesis process of isoindoline yellow pigment. Background technique [0002] The yellow pigment belongs to isoindoline pigments and can be used in production fields such as coatings, plastics and printing inks. Because the pigment molecules contain isoindoline rings, they can undergo tautomerization in structure, and hydrogen bonds can be formed between molecules and inside molecules, so that they present three-dimensional network stacking, and have various good pigments. Properties, such as acid and alkali resistance, solvent resistance, redox resistance, heat resistance and migration resistance. [0003] Structurally, this type of pigment molecule can be divided into two configurations: asymmetric and symmetrical, among which the symmetrical type is the main configuration used as a pigment. P.Y.139 is a representative variety of this type of pigment, and the brands of Ciba and BASF are Irgazine and Poliogen respecti...

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): C09B57/04
Inventor 李秀娟
Owner CINIC CHEM SHANGHAI
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