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Molding compositions based on vinyl aromatic copolymers for 3-D printing

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

Active Publication Date: 2020-04-17
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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  • Molding compositions based on vinyl aromatic copolymers for 3-D printing
  • Molding compositions based on vinyl aromatic copolymers for 3-D printing
  • Molding compositions based on vinyl aromatic copolymers for 3-D printing

Examples

Experimental program
Comparison scheme
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 molding composition for 3D printing, containing a polymer mixture A made of components a and b: a of 30 to 95% by weight of at least one vinylaromatic copolymer a, having 150000 to 360000 g / mol The average molar mass Mw,b is 5 to 70% by weight of at least one impact modifier b, wherein the molding composition has a low viscosity at a shear rate of 1 to 10 1 / sec and a temperature of 250°C at 1x10 5 Pa*s, and the melt volume rate (MVR, measured according to ISO 1133 at 220° C. and a 10 kg load) is greater 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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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/12C08L55/02B29C64/118B33Y70/00
CPCB33Y70/00C08F279/04C08L25/12B29C64/118B33Y40/10C08L55/02C08L53/00B29C64/106B29C64/386B33Y10/00B33Y50/02B29K2025/08
Inventor 诺伯特·尼斯内弗兰克·艾森崔格斯蒂芬妮·鲍曼伊丹娜·拉多万诺维奇汉斯维那·施密特约瑟夫·迈纳斯弗洛里安·维贝格
Owner INEOS STYROLUTION GRP GMBH