Sodium carboxymethylcellulose containing pentose structure unit

A technology of sodium carboxymethyl cellulose and carboxymethyl cellulose, which is applied in the field of active printing paste, can solve the problems of low utilization rate of etherifying agent chloroacetic acid, long production cycle, high production cost, etc., and achieve high cost performance and high production cost. The effect of short cycle time and simple manufacturing method

Inactive Publication Date: 2016-06-08
HANGZHOU HONGBO NEW MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For CMC with such ultra-high DS, regardless of the production process, due to the low utilization rate of the etherification agent chloroacetic acid and the long production cycle, there is a problem of high production cost

Method used

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  • Sodium carboxymethylcellulose containing pentose structure unit
  • Sodium carboxymethylcellulose containing pentose structure unit

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Experimental program
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Embodiment 1-3

[0032] One-step reaction, the sodium hydroxide solution with a concentration of 48-49% is converted into 116 parts of solid caustic soda, and 300 parts of ethanol solution with a weight concentration of 91%, mixed and cooled below 20°C, and added to the kneader. Then put in 162 parts of a specific pulp cellulose, which contains 9.2% of five-carbon polysaccharides and 90.8% of six-carbon polysaccharides. After feeding, seal the feeding port of the kneader, fill it with nitrogen, and alkalize for 30-80 minutes , the alkalization is controlled at 15-25°C. After the alkalization is completed, add a 50-80% weight concentration of chloroacetic acid solution (equivalent to 133 parts of chloroacetic acid), etherify for 30-60 minutes, and control the etherification temperature at less than 50°C. After adding chloroacetic acid, raise the temperature to 75-80°C and continue etherification for 50-80 minutes. After the etherification is completed, discharge and neutralize to 7-8, then wash ...

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Abstract

The invention discloses sodium carboxymethylcellulose containing pentose structure unit and relates to sodium carboxymethylcellulose having excellent spinning, printing and dyeing performance which includes color yield and hand feeling. With equal and even slightly lower degree of substitution, the sodium carboxymethylcellulose has better paste printing and dyeing performance than high-DS CMC. An adopted method includes: selecting polysaccharides with the pentose structure unit exceeding 8% for carboxymethylation of cellulose. A carboxymethylated product of the pentose structure unit is carboxymethylcellulose of an Arabian polysaccharide carboxymethylated product or an xylan carboxymethylated product; when the sodium carboxymethylcellulose is used as printing paste of active pigment, color yield is high, and fabric is soft in hand feeling.

Description

technical field [0001] The invention relates to sodium carboxymethyl cellulose (hereinafter referred to as CMC). The performance of its aqueous solution is small in thixotropy and special in structure, and it is suitable for the technical field of textile printing and dyeing, especially a reactive printing paste. Background technique [0002] As a CMC for printing and dyeing paste of rayon and cotton, it has high color yield and excellent depaste, which are all necessary properties. However, the hydroxyl group bound to the sixth carbon on the dehydrated grape residue on ordinary CMC, because this hydroxyl group is the same as the hydroxyl group on cotton, can react with reactive dyes. It will make it difficult to remove the paste from the fabric and make the hand feel hard. For this reason, the degree of substitution (DS) of CMC is often increased to more than 1.3, preferably 1.40, and it is best to achieve DS≥1.8 or DS>2.0 . [0003] Now, cotton is used for printing an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B11/12D06P1/50
CPCC08B11/12D06P1/50
Inventor 陈网根朱囯生
Owner HANGZHOU HONGBO NEW MATERIALS
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