Unlock instant, AI-driven research and patent intelligence for your innovation.

Process for the preparation of non-microencapsulated monodisperse bead polymers

A monodisperse, polymer technology, applied in the field of monodisperse bead polymers, can solve the problem of slow material swelling into the seed crystal, etc.

Inactive Publication Date: 2005-03-23
LANXESS DEUTDCHLAND GMBH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the seed feed method using microcapsules to seal the seed crystals, it was found that the capsule wall was a diffusion barrier, thus slowing the swelling of the feedstock into the seed crystals.

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

Embodiment 1

[0062] Preparation of unencapsulated monodisperse bead polymer from microencapsulated monodisperse monomer droplets

[0063] Prepare 440.4g of demineralized water, 1.443g of gelatin, and 0.107g of resorcinol in a 4l (l=liter) container with a ground port with a frame stirrer, condenser, temperature sensor, thermostat and temperature profile recorder And 0.721g of anhydrous disodium hydrogen phosphate added at the beginning of the aqueous mixture. Under stirring at 150 rpm (revolutions per minute), a mixture of 500 g of water and 500 g of microencapsulated monodisperse monomer droplets with a uniform particle size of 235 microns was added to the mixture added at the beginning. Monodisperse monomer droplets are composed of 99 parts by weight of styrene, 1 part by weight of divinylbenzene and 0.5 parts by weight of tert-butylperoxy-2-ethylhexanoate as an initiator (radical initiator), and a Formaldehyde cured composite coacervate capsule wall composed of gelatin and acrylamide / acryli...

Embodiment 2

[0065] Preparation of unencapsulated monodisperse bead polymer from microencapsulated monodisperse monomer droplets

[0066] Prepare 440.4g of demineralized water, 1.443g of gelatin, 0.107g of resorcinol and 0.721g of anhydrous phosphoric acid in a 4l container with a ground port with a frame stirrer, condenser, temperature sensor, thermostat and temperature profile recorder An aqueous mixture of disodium hydrogen added at the beginning. Under stirring at 150 rpm (revolutions per minute), a mixture of 500 g of water and 500 g of microencapsulated monodisperse monomer droplets with a uniform particle size of 235 microns was added to the mixture added at the beginning. Monodisperse monomer droplets consist of 99 parts by weight of styrene, 1 part by weight of divinylbenzene, and 0.5 parts by weight of tert-butylperoxy-2-ethylhexanoate as an initiator (radical initiator), and use Formaldehyde cured composite coacervate capsule wall composed of gelatin and acrylamide / acrylic acid copo...

Embodiment 3

[0068] Preparation of unencapsulated monodisperse bead polymer from microencapsulated monodisperse monomer droplets

[0069] Prepare 440.4g of demineralized water, 1.443g of gelatin, 0.107g of resorcinol and 0.721g of anhydrous phosphoric acid in a 4l container with a ground port with a frame stirrer, condenser, temperature sensor, thermostat and temperature profile recorder An aqueous mixture of disodium hydrogen added at the beginning. Under stirring at 150 rpm (revolutions per minute), a mixture of 500 g of water and 500 g of microencapsulated monodisperse monomer droplets with a uniform particle size of 330 microns was added to this initially added mixture. Monodisperse monomer droplets consist of 96 parts by weight of styrene, 4 parts by weight of divinylbenzene, and 0.5 parts by weight of tert-butylperoxy-2-ethylhexanoate as an initiator (radical initiator), and a Formaldehyde cured composite coacervate capsule wall composed of gelatin and acrylamide / acrylic acid copolymer. ...

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

Disclosed herein is the polymerization of monodisperse microencapsulated monomer droplets to produce monodisperse non-microencapsulated bead polymers through the addition strong alkalis or strong acids during the polymerization.

Description

Technical field [0001] The present invention relates to a method for preparing non-microencapsulated monodisperse bead polymers by polymerizing microencapsulated monodisperse monomer droplets. Background technique [0002] Recently, ion exchangers whose particle size is as uniform as possible (hereinafter referred to as monodisperse) have become more and more important. This is because in many applications, exchange beds containing monodisperse ion exchangers have more favorable hydrodynamic properties and can Obtain economic benefits. Monodisperse ion exchangers can be obtained by functionalizing monodisperse bead polymers. One possible method for preparing monodisperse bead polymers is to prepare monodisperse monomer droplets by atomizing the monomer into a continuous phase, and then solidify the droplets through polymerization. The formation of a uniform droplet size can be promoted by vibration excitation. Therefore, EP 0051210B1 describes a method for preparing spherical mon...

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): C08F2/00C08F2/18C08F2/20
CPCC08F2/18
Inventor L·菲斯特尔R·西德尔H·米塔格G·沙德W·波德尊C·西米德
Owner LANXESS DEUTDCHLAND GMBH