Process for producing a crosslinked cellulose ether

A technology of cellulose ether and cellulose, which is applied in the field of production of cross-linked cellulose ether, can solve problems such as excessive cross-linking affecting the process, achieve uniform distribution, and enhance the effect of the process window

Pending Publication Date: 2021-12-03
DOW GLOBAL TECH LLC
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because alkalization and etherification reactions are exothermic, there are many factors that can affect whether excessive crosslinking occurs in the process

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
  • Process for producing a crosslinked cellulose ether
  • Process for producing a crosslinked cellulose ether
  • Process for producing a crosslinked cellulose ether

Examples

Experimental program
Comparison scheme
Effect test

example

[0099] The following examples are provided to illustrate the invention in additional detail, but should not be construed as limiting the scope of the claims. All parts and percentages are by weight unless otherwise indicated.

[0100] Various terms and designations used in the following Inventive Examples (Inv. Ex.) and Comparative Examples (Comp. Ex.) are explained below and in Tables II to VI.

[0101] "HEMC" stands for hydroxyethylmethylcellulose.

[0102] "AGU" stands for anhydroglucose unit of cellulose ether.

[0103] "LVN" stands for the Intrinsic Viscosity Number of pulp as measured according to the procedure described in ISO 5351 (2010).

[0104] The various raw materials or ingredients used in the examples are explained below:

[0105] Epilox M 985 and Epilox P13-42 are poly(propylene glycol) diglycidyl ethers available from Leuna Harze AG.

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
degree of substitutionaaaaaaaaaa
Login to view more

Abstract

A process for producing a crosslinked cellulose ether including the steps of: (a) contacting at least one cellulose material with at least one alkalization reagent to form an activated cellulose material; (b) contacting the activated cellulose material of step (a) with at least one etherification reagent to form an uncrosslinked cellulose ether; (c) subjecting the cellulose ether of step (b) to a simultaneous or stepwise washing and / or granulating step; (d) adding at least one crosslinking agent to the uncrosslinked cellulose ether during the washing and / or granulating of step (c) to form a crosslinked cellulose ether; and (e) any other optional components desired; and a crosslinked cellulose ether produced by the above process.

Description

technical field [0001] The present invention relates to a process for producing crosslinked cellulose ethers and to crosslinked cellulose ethers prepared by such a process. Background technique [0002] Cellulose derivatives, such as cellulose ethers, are widely used as thickeners, adhesives, binders and dispersants, water retaining agents, protective colloids, stabilizers and suspending agents due to their excellent properties and physiological safety. agents, emulsifiers and film formers. Furthermore, cellulose ethers are known to be used in dry-mix mortars in various construction applications to improve the rheology of the mortar. Additionally, cellulose ethers are used in mortars to impart water-retaining properties, thereby limiting the loss of water from the mortar to the absorbent substrate. This ensures that sufficient water is available to the hydraulic binder (cement or gypsum) during the setting reaction, resulting in a high mechanical strength of the final prod...

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(China)
IPC IPC(8): C04B24/38C04B28/02C04B28/14C08B11/02C08B11/08C08B15/00C08L1/08C08B11/20
CPCC04B24/383C04B28/02C04B28/14C08B11/02C08B11/08C08B15/005C08L1/08C08B11/20C04B2103/0062C04B40/0608C04B20/023
Inventor A·希尔德J·纽鲍尔S·门茨
Owner DOW GLOBAL TECH LLC
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