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Poly(methyl)acrylate as multifunctional additive in plastics

An acrylate and additive technology, applied in the field of new single-component poly(meth)acrylate-based additives, can solve problems such as difficulty and adhesion

Inactive Publication Date: 2013-12-25
EVONIK OIL ADDITIVES GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the lubricant is that it can only be used as a two-component system and that polymer A tends to block
Furthermore, it is only very difficult to ensure that the two components of the lubricant are sufficiently compatible with the thermoplastic matrix and that no microphase separation occurs which adversely affects the mechanical properties

Method used

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  • Poly(methyl)acrylate as multifunctional additive in plastics
  • Poly(methyl)acrylate as multifunctional additive in plastics
  • Poly(methyl)acrylate as multifunctional additive in plastics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6（IE1-6） and comparative Embodiment 1

[0088] Examples 1-6 (IE1-6) and Comparative Example 1 (CE1)

[0089] IE1-6 and CE1 were performed in a Krauss Maffei KMDL25 twin-screw extruder with a screw speed of 30min -1 , metering screw speed 20min -1 , Pre-tempering temperature 170°C, inlet temperature 190°C and constant mold temperature (2 measuring points) 195°C. Here, the barrel temperature settings were 185°C in the front zone and 190°C in the back zone. Run with 100% fill.

[0090] Table 2 shows the corresponding compositions. Table 3 shows the relevant experimental results and / or variable extruder parameters. The melt pressure 1-3 is measured together with the melt temperature directly after metering (1), in the middle of the extruder (2) and immediately before discharge (3).

[0091] Table 2

[0092]

[0093] table 3

[0094]

[0095] It can already be seen from examples 1-3 (0.08% by weight) with only a low concentration of the additive according to the invention that less energy has to be used in e...

Embodiment 7-8（IE7-8） and comparative Embodiment 2 and 3

[0097] Examples 7-8 (IE7-8) and Comparative Examples 2 and 3 (CE2-3)

[0098] IE7-8 and CE2-3 used a Weber 11-25 counter-rotating twin-screw extruder with a die (Greiner) connected to form the window profile. Here, the screw speed was adjusted to 40 rpm. Run with 100% fill.

[0099] The temperature profile with 5 heating zones shows a temperature rise from 160°C to 190°C from the metered feed to the die with a die temperature of 190°C.

[0100] Table 4 shows the corresponding compositions. Table 5 shows the relevant experimental results and / or variable extruder parameters. Melt pressures 1-3 were measured after extruder sections corresponding to 9 (1), 14 (2) and 20 (3) diameters of the extruder (D9, D14 and D20). Melt pressure 4 corresponds to the pressure immediately before the die and melt pressure 5 corresponds to the pressure immediately after the die.

[0101] Table 4

[0102]

[0103] table 5

[0104]

[0105] When performing these experiments with...

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Abstract

The invention relates to the additivation of thermoplastics, in particular polyvinyl chloride (PVC), using a novel single-component additive. The thus achieved improvement of the lubricating properties leads to a delayed melting of the thermoplasts during the extrusion process and thus to an advantageous fluidity and a reduction of the required processing pressure. Furthermore, the improved lubricating effect facilitates the processing in shaping machines in that a lower metal adhesion is produced. According to the invention, a novel poly(methyl)acrylate-based additive for thermoplastics, in particular for PVC, is provided in order to improve said technical aspects. The additive is characterized by a poly(methyl)acrylate backbone and long alkyl side-chains.

Description

technical field [0001] Many thermoplastics, especially polyvinyl chloride (PVC), have sub-optimal mechanical properties and additives must be added. For example, impact modifiers are often added to PMMA or PVC to improve impact resistance. Another aspect is the sliding effect of the plastic. Many thermoplastics here require improved additive additions which lead to easier extrudability or processability and better mechanical properties. Improved sliding properties lead, for example, to a delayed melting of the thermoplastic during extrusion and thus to a more favorable flowability and a reduction in the required processing pressure. Furthermore, a better sliding effect facilitates processing in forming machines by resulting in lower adhesion to the metal. This is especially the case for PVC, which is inherently brittle and difficult to extrude due to low melt viscosity. [0002] In order to improve these technical aspects, the present invention provides novel one-component...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/06C08L101/00
CPCC08L27/06
Inventor H·考茨H·布劳恩R·高哈雷
Owner EVONIK OIL ADDITIVES GMBH