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Moulding compositions based on vinylaromatic copolymers for 3d printing

A 3D printing and composition technology, applied in the field of 3D printing, can solve the problem of high viscosity

Active Publication Date: 2016-10-26
INEOS STYROLUTION GRP GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the aforementioned materials are often too brittle for 3D printing, and toughness and their odor should be improved
Furthermore, the viscosity of the melt flow index at low shear rates is often too high with prior art materials and should likewise be improved

Method used

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  • Moulding compositions based on vinylaromatic copolymers for 3d printing
  • Moulding compositions based on vinylaromatic copolymers for 3d printing
  • Moulding compositions based on vinylaromatic copolymers for 3d printing

Examples

Experimental program
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Effect test

Embodiment

[0382] The following copolymers were used as polymer a:

[0383] a1: SAN copolymer with 73% by weight of styrene and 27% by weight of acrylonitrile (=S / AN 73 / 27), MVR (220°C / 10'): 55ccm / 10min

[0384] a2: SAN copolymer (S / AN 81 / 19), MVR (220°C / 10'): 46ccm / 10min

[0385] a3: SAN copolymer (S / AN 75 / 25), MVR (220°C / 10'): 10ccm / 10min

[0386] a4: SAN copolymer (S / AN 65 / 35), MVR (220°C / 10'): 16ccm / 10min

[0387] a5: SAN copolymer (S / AN 65 / 35), MVR (220°C / 10'): 61ccm / 10min

[0388] a6: AMSAN copolymer (AMS / AN 70 / 30), MVR (220°C / 10'): 8ccm / 10min

[0389] a7: a mixture of SAN copolymer a1 and AMSAN copolymer a6 (SAN / AMSAN ratio according to Table 1 to 3)

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Abstract

Thermoplastic moulding composition for 3D printing containing a polymer mixture A made of components a and b: a being from 30 to 95 % by weight of at least one vinylaromatic copolymer a with average molar mass Mw from 150 000 to 360 000 g / mol, b being from 5 to 70 % by weight of at least one impact modifier b, where the viscosity of the moulding composition (measured in accordance with ISO 11443) at shear rates of from 1 to 10 1 / sec and at a temperature of 250 DEG C is not higher than 1x105 Pa*s and the Melt Volume Rate (MVR, measured in accordance with ISO 1133 for 220 DEG C and 10 kg load) is more than 6 ml / 10 min.

Description

technical field [0001] The present invention relates to molding compositions based on vinylaromatic copolymers having an improved toughness / viscosity balance and to their use for 3D printing. Background technique [0002] The use of amorphous thermoplastics for 3D printing, especially acrylonitrile-butadiene-styrene (ABS), is known. For example, EP-A 1015215 describes a method for producing three-dimensional objects of predetermined shape from materials which can be thermally compacted. For 3D printing, the material is first fluidized and extruded, and two or more layers of material are applied movingly to a support, and then the shaped material is compacted by cooling below the solidification temperature of the material. The heat-compactable materials used comprise amorphous thermoplastics, especially acrylonitrile-butadiene-styrene (ABS). [0003] EP-A 1087862 describes a rapid prototyping system for the production of three-dimensional articles by extrusion and applicati...

Claims

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Application Information

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IPC IPC(8): C08L25/00C08L55/02B29C67/00
CPCB33Y70/00C08F279/04C08L25/12B29C64/118B33Y40/10C08L55/02C08L53/00B29C64/106B29C64/386B33Y10/00B33Y50/02B29K2025/08
Inventor 诺伯特·尼斯内弗兰克·艾森崔格
Owner INEOS STYROLUTION GRP GMBH