Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Catalyst solution for implementing anionic lactam polymerisation, method for production thereof and polyamide moulding compound

A technology of catalysts and compounds, applied in the field of polyamides, can solve problems such as limited storage life, and achieve the effects of easy operation and simplified technical equipment indicators

Inactive Publication Date: 2005-05-18
EMS CHEM AG
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It has therefore been shown that this type of system has only a limited shelf life

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
  • Catalyst solution for implementing anionic lactam polymerisation, method for production thereof and polyamide moulding compound
  • Catalyst solution for implementing anionic lactam polymerisation, method for production thereof and polyamide moulding compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-10

[0083] Embodiment 1-10: sodium acetanilide, the synthesis of NaAA

[0084] Examples 1-10 in Table 1 describe the formation of the liquid catalyst NaAA directly in the solvating agent NOP.

[0085] In all these examples, acetanilide AA was dissolved in the solvent NOP and quantitatively deprotonated by sodium methylate NaOMe. The ratio AA:NaOMe was chosen to be 1.05:1 and AA was used in a slight excess. The ratio AA / S is selected as a ratio of 1:4.0 to 1:1.0, the viscosity increases with decreasing solvent content. Concentration c increased correspondingly from 0.94 to 2.77 mol / kg. According to the present application, the viscosity of the catalyst can be controlled in this way.

[0086]

test

The molar ratio of

AA:NOP:NaOMe

T

[℃]

m(AA)

[g]

m(NOP)

[g]

m(NaOMe)

[g]

Concentration c

[mol / kg]

1

1.05∶4.0∶1

60

71.0

394.0

89.1

0.94 ...

Embodiment 11-17

[0090] Examples 11-17: Sodium acetanilide in different solvents

[0091] Examples 11-17 in Table 2 describe the synthesis of NaAA in different solvating agents, indeed in pyrrolidone NMP, n-cyclohexylpyrrolidone, n-dodecylpyrrolidone, n-hexylpyrrolidone and tetrabutylpyrrolidone and in urea DMEU and TBH. The synthesis process is similar to Example 1. AA was dissolved in the relevant solvating reagent and sodium methylate solution was added dropwise under vacuum. AA is still slightly overused. The catalysts were all obtained as clear, colorless to brown solutions.

[0092]

Embodiment 18-24

[0093] Examples 18-24: Polymerization of NaAA using different activators

[0094] Examples 18-21, cited in Table 3a, describe the polymerization of lactam-12 with NaAA in NOP activated by different activators, the catalyst / activator ratio always being 1:1. All polymerizations were performed under the same conditions.

[0095] All catalyst-activator mixtures undergo more or less discoloration from colorless to brown, which in the case of S7000 is very pronounced and rapid. The results show that polymers with optimum color can be obtained if the relevant mixture is produced shortly before polymerization.

[0096] Stability testing of NaAA stored in NOP showed significantly better stability compared to the system activated with CyI. After 2 months, the Tu time did not change during storage in the dark under inert gas, normal oxygen exposure and light. The color index according to Gardner remains constant at 5.4.

[0097] The CyI activated catalyst on the other hand has a Tu t...

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 present invention relates to an alkali metal salt solution of aniline, its production method and polyamide produced using the solution. The alkali metal salt solution of aniline and the monovalent carboxylic acid or its derivative are amidated in an aprotic solvating agent, wherein the alkali metal salt solution is strongly alkaline, clear, stable in storage and stable at room temperature liquid.

Description

technical field [0001] The present invention relates to an alkali metal salt solution of aniline, its production method and polyamide produced using the solution. Said alkali metal salt solution of aniline and monovalent carboxylic acid or derivatives thereof are amidated in an aprotic solvating agent, wherein said alkali metal salt solution is strongly alkaline, clear, stable in storage and stable at room temperature Below is liquid. Background technique [0002] Various developments for accelerating the polymerization of anionic lactams have become known, which use so-called liquid systems to initiate the polymerization of lactams. A liquid multicomponent system of this type for carrying out the anionic lactam polymerization is described in DE 196 03 305 . The system essentially comprises sodium caprolactam comprising a lactam acylated compound and a solvating agent. [0003] It has therefore been shown that systems of this type have only a limited shelf life. [0004]...

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): C08G69/20C08G63/82
CPCC08G63/823C08G69/20
Inventor 爱德华·施密德海因茨·霍夫奥纳尔夫·雷克辛
Owner EMS CHEM AG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com