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A gel filtration chromatography analysis method of hydrophilic polymer used for an untreated positive-image plate

A hydrophilic polymer and gel filtration chromatography technology, applied in the field of chemical analysis, can solve problems such as easy to get dirty in the blank part, decomposition of five-membered carboxylic acid anhydride ring or unstable hydrolysis, heavy color of printed ink, etc., to achieve easy operation, Effectively separated, easily repeatable effects

Active Publication Date: 2014-06-25
LUCKY HUAGUANG GRAPHICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this polymer has disadvantages of instability such as decomposition or hydrolysis of the five-membered carboxylic anhydride ring over time and temperature / humidity changes during storage
[0007] However, Chinese patent publication CN 1475344A describes another heat-sensitive composition for printing plates, which also has the disadvantage that the blank part is very easy to get dirty, resulting in too heavy printing ink.

Method used

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  • A gel filtration chromatography analysis method of hydrophilic polymer used for an untreated positive-image plate
  • A gel filtration chromatography analysis method of hydrophilic polymer used for an untreated positive-image plate
  • A gel filtration chromatography analysis method of hydrophilic polymer used for an untreated positive-image plate

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Effect test

Embodiment 1

[0039] A kind of gel filtration chromatographic analysis method of hydrophilic polymer for non-processing plate of positive image, the steps are as follows:

[0040] (1) Configuration of eluent

[0041] Weigh 8.5g ± 1.0g of sodium nitrate, dissolve it with deionized water to obtain a sodium nitrate aqueous solution with a certain concentration range, then filter it with a 0.45 micron water-soluble filter membrane, and set aside;

[0042] (2) Determination of column group

[0043] Connect the three chromatographic columns of Ultrahydrogel 2000, Ultrahydrogel 1000 and Ultrahydrogel 500 together in order to form the column set used for analyzing the hydrophilic polymer;

[0044] (3) Preparation of standard sample solution

[0045] According to the characteristics of large molecular weight and narrow distribution of the substance to be tested, weigh polyacrylic acid (PAA) standard samples with Mw=1000, 7000, 30000, 100000, 1000000, and dissolve them in water to a concentration o...

Embodiment 2

[0073] A gel filtration chromatographic analysis method of hydrophilic polymer polyacrylamide for a positive image non-processing plate, the steps are as follows:

[0074] (1) Configuration of eluent

[0075] Weigh 5.0g±1.0g of sodium nitrate, dissolve it with deionized water, then filter it with a 0.45 micron water-soluble filter membrane, and set aside;

[0076] (2) Determination of column group

[0077] Connect the three chromatographic columns of Ultrahydrogel 2000, Ultrahydrogel 1000 and Ultrahydrogel 500 together in order to form the column set used for analyzing the hydrophilic polymer;

[0078] (3) Preparation of standard sample solution

[0079] According to the characteristics of large molecular weight and narrow distribution of the substance to be tested, weigh polyacrylic acid (PAA) standard samples with Mw=1000, 3000, 30000, 100000, 1000000, and dissolve them in water to a concentration of 0.6~4mg / mL;

[0080] (4) Chromatographic analysis conditions

[0081] ①...

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Abstract

The invention discloses a gel filtration chromatography analysis method of hydrophilic polymer used for an untreated positive-image plate. The method includes: subjecting the standard polymer of the hydrophilic polymer to gel filtration chromatography analysis, establishing a standard curve, determining an equation of the standard curve, and subjecting a hydrophilic polymer sample to gel filtration chromatography analysis. The method is easy to operate and prone to repetition, and effectively overcomes quantitative analysis of the hydrophilic polymer and oligomer products.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis, and relates to an analysis method for the relative molecular mass and distribution of a hydrophilic polymer in an infrared light-sensitive composition used in a positive-working untreated plate, in particular to a A method for analyzing the relative molecular mass and distribution of hydrophilic polymers by gel filtration chromatography. It can be used to analyze the relative molecular weight and distribution of high molecular weight polymers with a weight average molecular weight of 200,000 to 500,000 and a distribution coefficient of 1.5 to 2.5. It can also be used as an enterprise quality inspection standard for related products, and can be used to study its polymerization. mechanism. technical background [0002] The plates used in traditional "wet" offset printing generally consist of a hydrophilic plate base and a resin layer coated on it. [0003] The resin layer is composed of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/26
Inventor 王怀功
Owner LUCKY HUAGUANG GRAPHICS
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