Production method of carboxymethyl cellulose acetate butyrate

A technology of carboxymethyl cellulose and sodium carboxymethyl cellulose, which is applied in the production field of carboxymethyl cellulose acetate butyrate, can solve the problem that the intermolecular force increases hydrogen bond force, cannot prepare CMCAB, and is disadvantageous. Esterification reaction and other problems, to achieve the effect of low production process temperature, short production cycle and simple operation process

Active Publication Date: 2016-03-23
CHONGQING LIHONG FINE CHEM +1
View PDF7 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The CMC prepared by the traditional kneader, due to the strong shear force of the kneader, the CMC fiber bundles and fiber microfibers are in a tight state, the distance between the bundles is further sh

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 Embodiment

[0032] Example 1

[0033] (1) Preparation of CMC-Na: The performance index of the prepared CMC-Na is: DS=0.12, moisture content 5.3%, purity 99.0%. Disperse 80g of refined cotton powder in isopropanol / water solution. The mass ratio of isopropanol to water is 20.0:1, and the mass ratio of solution and refined cotton powder is 16.5:1. Exclude the air in the reactor, fill it with inert gas, then add 84.0g of 25%wt NaOH aqueous solution at 10°C to 20°C, alkalinize for 1.5h; after alkalinization, reduce the temperature of the reaction system to about 10°C, use Slowly add 42.9g of 56.0%wt monochloroacetic acid / isopropanol solution in 15-20min, then heat to 50℃ for etherification for 1.5h, then continue heating to 75℃ for etherification for 30min, add 18.0g of 50%wt acetic acid / water solution For neutralization, wash 2-3 times with 85% v / v alcohol / water solution, dry, crush, and set aside.

[0034] (2) Preparation of CMC-H: immerse 44.8g of CMC-H in acidification solution for acidificat...

Example Embodiment

[0038] Example 2

[0039] (1) Preparation of CMC-Na: The performance index of the prepared CMC-Na is: DS=0.23, moisture content 5.3%, purity 99.0%. Disperse 80 g of refined cotton powder in isopropanol / water solution. The mass ratio of isopropanol to water is 14.0:1, and the mass ratio of solution to refined cotton powder is 16.8:1. Exclude the air in the reactor, fill it with inert gas, then add 120.0g of 25%wt NaOH aqueous solution at 10°C to 20°C, alkalinize for 1.5h; after alkalinization, reduce the temperature of the reaction system to about 10°C, use Slowly add 58.9g of 56.0%wt monochloroacetic acid / isopropanol solution in 15-20min, then heat up to 50℃ for etherification for 1.5h, then continue heating to 75℃ for etherification for 30min, add 22.0g of 50%wt acetic acid / water solution For neutralization, wash 2-3 times with 75% v / v alcohol / water solution, dry, crush, and set aside.

[0040] (2) Preparation of CMC-H: immerse 50.0g of CMC-H in acidification solution for acidif...

Example Embodiment

[0044] Example 3

[0045] (1) Preparation of CMC-Na: The performance index of the prepared CMC-Na is: DS=0.35, moisture content 5.3%, purity 99.0%. Disperse 80 g of refined cotton powder in isopropanol / water solution. The mass ratio of isopropanol and water is 11.6:1, and the mass ratio of solution and refined cotton powder is 17.1:1. Exclude the air in the reactor, fill it with inert gas, then add 144.0g of 25%wt NaOH aqueous solution at 10°C to 20°C, and alkalize for 1.5h; after alkalization is completed, reduce the temperature of the reaction system to about 10°C. Slowly add 75.0g of 56.0%wt monochloroacetic acid / isopropanol solution in 15-20min, then heat to 50℃ for etherification for 1.5h, then continue heating to 75℃ for etherification for 30min, add 26.0g of 50%wt acetic acid / water solution For neutralization, wash 2-3 times with 75% v / v alcohol / water solution, dry, crush, and set aside.

[0046] (2) Preparation of CMC-H: immerse 49.4g of CMC-H in acidification solution fo...

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 production method of carboxymethyl cellulose acetate butyrate and aims to provide a continuous production process of carboxymethyl cellulose acetate butyrate that overcomes the existing difficulty that carboxymethyl cellulose acetate prepared by a traditional kneader method is inapplicable to the preparation of carboxymethyl cellulose acetate butyrate. The production method includes sodium carboxymethyl cellulose preparation, acidification, activation, esterification and purification. The production method has a short production period, the temperature is low, unit energy consumption is low, loss of raw materials is low, an operating process is simple, and manufacturing cost is greatly reduced; waterborne overlay coatings prepared based on the carboxymethyl cellulose acetate butyrate meet the requirement on environmental protection, are less harmful to the environment and human body and have excellent performance, and in the face of the requirement of automobile and aviation industries expanding day by day on waterborne overlay coatings, the carboxymethyl cellulose acetate butyrate has a promising application prospect and can also be made into different types of products according to different requirements, meeting requirements of a wider range.

Description

technical field [0001] The invention relates to a preparation method of a water-based paint leveling agent material in the field of natural polymer chemical modification, in particular to a production method of carboxymethyl cellulose acetate butyrate. Background technique [0002] In recent years, the automobile and aviation industries have developed rapidly, and related industries have also been greatly stimulated. Among them, water-based finish paint is an indispensable product for the maintenance, anticorrosion and beautification of automobiles and aviation products. At the same time, it meets the higher requirements of the society for environmental protection, and its application scope is expanding day by day. A key problem that needs to be solved for water-based finishes is the compatibility of water and oily materials and metal powders. Most water-based finishes require some organic materials as matrix film-forming substances, and nano-TiO 2 In addition, many metal f...

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): C08B3/18C08B11/12C08B1/08C09D7/06C09D7/47
Inventor 邵自强段洪涛周振文赵明李友琦何玉明陈静
Owner CHONGQING LIHONG FINE CHEM
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