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Polymer comprising amide and ester groups method for production and use thereof

An amide-based, polymer-based technology for use in amides and esters to address incomplete, high exhaust filter and exhaust air loads, elevated distilled water contamination, etc.

Inactive Publication Date: 2007-04-11
SIKA TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Incomplete reaction, elevated contamination of distilled water and high loading of exhaust filters and exhaust air were observed

Method used

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  • Polymer comprising amide and ester groups method for production and use thereof
  • Polymer comprising amide and ester groups method for production and use thereof
  • Polymer comprising amide and ester groups method for production and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0081] Example series 1

[0082] First step: Esterification / amidation and anhydride formation

[0083] A reaction vessel with stirrer, thermometer, vacuum connection and distillation unit was prefilled with 960 g of a 40% aqueous solution of polymethacrylic acid with an average molecular weight of 5000 g / mol. Under stirring, 10 g of 50% sulfuric acid and 16 g of a copolymer formed from ethylene oxide and propylene oxide with an EO / PO ratio of 70:30 and a molecular weight of M w 2000 g / mol, with methoxy groups on one side and primary amino groups on the other side. 1200 g of polyethylene glycol endcapped on one side with methoxy groups and having an average molecular weight of 1100 g / mol were added in the melt, and the reaction mixture was heated slowly to 160° C. with stirring. Water is continuously distilled off during this process. Once the reaction mixture reached 160° C., the mixture was stirred at this temperature for 30 minutes and continued to distill off water. The...

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PUM

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Abstract

One aspect of the invention relates to a process for the preparation of polymers P having amide groups and ester groups, wherein, in a first step, a homopolymer or copolymer P1 of (meth)acrylic acid is mixed with a monohydroxy compound E at a temperature of up to 200 °C, resulting in the formation of anhydride groups in addition to ester groups. In the second step, the anhydride groups formed in the first step are reacted with monoamine compound A at a temperature significantly lower than 100 °C. Another aspect of the invention relates to the polymer obtained according to the process, the use of the polymer in a hydraulic composition, and the hydraulic composition before and after hardening by water.

Description

field of invention [0001] This invention relates to amides and esters of polymers formed from α,β-unsaturated carboxylic acids. technical background [0002] Polymers formed from α,β-unsaturated carboxylic acids with polyalkylene glycol side chains have long been used in concrete technology as fluidizers due to their strong reduction of water content. These polymers have a comb polymer structure. A series of such comb polymers have amide groups in addition to ester and carboxylic acid groups. [0003] There are mainly two methods used to prepare these polymers. The polymers are prepared either by free-radical polymerization of the corresponding carboxylic acid, ester and amide functional monomers, or in so-called polymerization-like reactions from polycarboxylic polymers and the corresponding alcohols and amines. [0004] The route via free-radical polymerization is the most common method, but this method is difficult for a particular compound due to the commercial availa...

Claims

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Application Information

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IPC IPC(8): C08F8/14C08F8/32C08F8/48C04B24/26C04B24/32
CPCC04B24/2647C04B24/2694C04B2103/32C04B2103/408C08F8/14C08F8/32C08F8/48C08F20/06C08F220/06
Inventor U·舒尔泽I·朔贝尔U·费尔腾A·克拉普夫
Owner SIKA TECH AG
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