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Method for producing pasteable polymers

A polymer and unsaturated technology, applied in the direction of chemical instruments and methods, chemical/physical processes, etc., can solve problems such as adverse effects on performance, and achieve the effect of avoiding complicated preparation and shortening the time of metering and adding

Active Publication Date: 2008-03-12
VESTOLIT GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that after drying of the latex (preferably spray drying), the paraffins which are not compatible with the polymer will mostly remain in the polymer and adversely affect the properties of the final product (fogging in automotive applications; migration, Indoor emissions (VOC values) in the field of floor coverings and wallpapers

Method used

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  • Method for producing pasteable polymers
  • Method for producing pasteable polymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 4400kg deionized water was added to the 15m3 stirred tank as an initial charge. Then add the following materials to it

[0050] 55kg alkyl aryl sulfonate

[0051] 55kg octadecyl monoethylene glycol ether

[0052] 5.5kg dimyristyl peroxydicarbonate

[0053] 5500kg vinyl chloride

[0054] The mixture was stirred at 25 °C for 15 min and then pressed through a rotor-stator-disperser with 10.5 bar and 0.5 mm gap width into 15 m 3 Stir in the kettle. The dispersion time here is 36min, and the throughput is 18m 3 / h.

[0055] The reaction mixture was heated in an autoclave to a polymerization temperature of 52°C. The polymerization time is about 8h.

[0056] After removal of the monomers, the dispersion is processed by means of spray drying to produce polyvinyl chloride powder. The spray-drying conditions are adjusted so that the particle size distribution of the powder meets the requirement of <1 wt% of particles larger than 63 μm.

[0057] To determine the rheologi...

Embodiment 2

[0059] 4400kg deionized water was added as an initial charge to the 15m 3 Stir in the kettle. Then add the following materials to it

[0060] 35kg alkyl aryl sulfonate

[0061] 35kg octadecyl monoglycol ether

[0062] 5.5kg dimyristyl peroxydicarbonate

[0063] 5500kg vinyl chloride

[0064] The mixture was stirred for 15 min at 25 °C and then pressed through a rotor-stator-disperser with 10.5 bar and 0.5 mm gap width into 15 m 3 Stir in the kettle. The dispersion time here is 36min, and the throughput is 18m 3 / h.

[0065] The reaction mixture was heated in an autoclave to a polymerization temperature of 52°C. The polymerization time is about 8h.

[0066] The dispersion was processed as in Example 1. The paste viscosities of the powders are reported in Table 1.

Embodiment 3

[0068] 4400kg deionized water was added as an initial charge to the 15m 3 Stir in the kettle. Then add the following materials to it

[0069] 35kg alkyl aryl sulfonate

[0070] 35kg octadecyl monoglycol ether

[0071] 5.5kg dimyristyl peroxydicarbonate

[0072] 3000kg vinyl chloride

[0073] The mixture was stirred for 15 min at 25 °C and then pressed through a rotor-stator-disperser with 10.5 bar and 0.5 mm gap width into 15 m 3 Stir in the kettle. The dispersion time here is 30min, and the throughput is 18m 3 / h. 2500 kg of vinyl chloride was fed into the stirred tank and the reaction mixture was subsequently heated.

[0074] The reaction mixture was heated in an autoclave to a polymerization temperature of 52°C. The polymerization time is about 8h.

[0075] The dispersion was processed as in Example 1. The paste viscosities of the powders are reported in Table 1.

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Abstract

The invention relates a single-step discontinuous method for producing pasteable polymers, in particular, vinyl chloride homopolymers and copolymers according to the microsuspension method. When they are mixed with softeners, said polymers turn into PVC-pastes, also know as plastisols, having very low viscosities and a reduced emulsifier content.

Description

technical field [0001] The present invention relates to a one-step batch process for the preparation of paste-able polymers, in particular homo- and copolymers of vinyl chloride, by means of a microsuspension process, wherein the above-mentioned raw materials are blended with plasticizers to produce PVC pastes, also called plastisols (Plastisole), which has very low viscosity and low emulsifier content. Background technique [0002] It is known that homo- and copolymers of vinyl chloride for the production of plastisols can be prepared by continuous and batch processes. The viscosity of the paste has a decisive influence on the processability of the plastisol. For most applications (coating processes such as spreading, printing, but also processing by dipping and by casting), low paste viscosities are favorable for increased productivity. An additional advantage of low paste viscosity is that the amount of volatile-generating processing aids can be reduced, possibly to zer...

Claims

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Application Information

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IPC IPC(8): C08F14/06C08F2/16
CPCB01J2219/00029B01J8/10C08F14/06C08F2/16
Inventor H·班科尔特J·-S·格尔克K·米勒A·斯蒂尼克M·特拉格
Owner VESTOLIT GMBH & CO KG
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