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Biodegradable free-spraying aesthetic resin and preparation method thereof

A kind of aesthetic resin and biodegradable technology, which is applied in the field of biodegradable spray-free aesthetic resin and its preparation, can solve the problems that it is difficult to achieve consistent fluidity, poor compatibility, and no polylactic acid resin has been found, and achieve a good metallic luster effect , excellent mechanical properties and thermal properties

Active Publication Date: 2011-10-05
SHANGHAI KUMHOSUNNY JINSHAN PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is mainly related to the affinity between the matrix resin and the aluminum powder: the surface of the inorganic aluminum powder pigment particles has only a few hydroxyl or carboxyl groups, and the usual resin materials generally do not have groups that can react with them, and the compatibility between the two is poor. Under strong shear conditions, it is difficult to achieve the same fluidity between the aluminum powder pigment and the matrix resin material, and it is easy to form flow marks
Related patent applications for degradable polylactic acid resins have appeared in the prior art, such as the Chinese invention patent applications with publication numbers CN101948613A and CN101914274A, but no degradable polylactic acid resins with metal effects have been found

Method used

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  • Biodegradable free-spraying aesthetic resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Put 40kg of L-polylactic acid resin, 25kg of core-shell impact modifier, 35kg of polymethyl methacrylate resin, 0.2kg of antioxidant IG-245, 0.2kg of antioxidant 168, and 0.7kg of lubricant EBS at 60°C Dry in oven for 5~8h;

[0040] Dilute the coupling agent (KH550) with absolute ethanol at a ratio of 1:20, then mix it with aluminum powder or pearlescent pigment at a weight ratio of 1:5, and then place it in a high-speed mixer for 3-10 minutes. Complete the surface pretreatment of aluminum powder pigments;

[0041] Add 0.5kg of the above-mentioned metallic pigments and 0.3kg of pearlescent pigments that have undergone surface pretreatment, together with all the above-mentioned dried raw materials, into a high-speed mixer and stir for 25 minutes before discharging. Then, when the aspect ratio is 36 and the diameter is Extrude and granulate in a 35mm twin-screw extruder, the barrel temperature of the extruder is 170-220°C, and the screw speed is 200-600rpm.

Embodiment 2

[0043] In order to reflect the significance of using modified polylactic acid in the present invention, this example is specifically compared and implemented.

[0044] Dry 100kg of L-polylactic acid resin, 0.2kg of antioxidant IG-245, 0.2kg of antioxidant 168, and 0.7kg of lubricant EBS in an oven at 60°C for 5~8h;

[0045]Dilute the coupling agent (KH560) with absolute ethanol at a ratio of 1:20, then mix it with aluminum powder or pearlescent pigment at a weight ratio of 1:5, and then place it in a high-speed mixer for 3-10 minutes. Complete the surface pretreatment of aluminum powder pigments;

[0046] Add 0.5kg of the above surface-treated metallic pigments and 0.3kg of pearlescent pigments together with all the above-mentioned dried raw materials into a high-speed mixer and stir for 25 minutes before discharging. Extrude and granulate in a twin-screw extruder, the barrel temperature of the extruder is 170~220°C, and the screw speed is 400rpm.

Embodiment 3

[0048] In order to reflect the significance of the impact modifier surface active groups on the improvement of flow marks, this example is specifically compared and implemented.

[0049] 40kg of L-polylactic acid resin, 25kg of styrene-butyl acrylate-acrylic acid copolymer, 35kg of polymethyl methacrylate resin, 0.2kg of antioxidant IG-245, 0.2kg of antioxidant 168, 0.7kg of lubricant EBS, Dry in an oven at 60°C for 5~8h;

[0050] Dilute the coupling agent (KH550 or KH560) with absolute ethanol at a ratio of 1:20, then mix it with aluminum powder or pearlescent pigment at a weight ratio of 1:5, and then place it in a high-speed mixer for 3~ 10min, complete the surface pretreatment of the aluminum powder pigment;

[0051] Add 0.5kg of the above surface-treated metallic pigments and 0.3kg of pearlescent pigments together with all the above-mentioned dried raw materials into a high-speed mixer and stir for 25 minutes before discharging. Extrude and granulate in a twin-screw ext...

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Abstract

The invention discloses a biodegradable free-spraying aesthetic resin and a preparation method thereof, and the composite raw materials comprises the following components by weight: 10-80 parts of polylactic acid resin, 20-70 parts of polymethyl methacrylate, 0-30 parts of impact modifiers, 0.1-0.8 parts of antioxidants, 0.1-2.0 parts of lubricants, 0-3.0 parts of metal pigments, and 0-3.0 parts of pearlescent pigments. The raw materials are dried in an oven at 60 DEG C for 5-8 hours; then metal pigments or pearlescent pigments treated by a coupling agent are added proportionally; the mixtureis premixed by a high-speed mixer, is processed by melt extrusion through a twin-screw extruder, and is cooled and granulated. Not only the obtained product has good metallic luster effect, but also its injection product has excellent mechanical properties and thermal properties, has beautiful appearance and no flowing marks, is biodegradable, is applicable to the manufacture of appearance parts of household appliance and office products which has high requirements on appearance.

Description

technical field [0001] The invention relates to a resin composition and a preparation method thereof, in particular to a biodegradable spray-free aesthetic resin and a preparation method thereof. Background technique [0002] The spray-free metal effect resin can achieve the pearlescent and flashing pearlescent effects of spraying without spraying, and does not produce toxic and harmful gases, dust and other pollutants to the environment, so it can truly achieve energy saving and emission reduction in the production process. It can be seen that the spray-free metal effect resin will have unique advantages and form a huge market potential. [0003] Common plastics that can be used to prepare aesthetic resins include PP, ABS, PMMA, ABS / PMMA, PS, etc. By directly adding aluminum powder pigments to the resin base, the metal effect can be achieved, but it is easy to produce flow marks during the injection molding process. question. This is mainly related to the affinity between...

Claims

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Application Information

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IPC IPC(8): C08L33/12C08K13/06C08L51/00C08K3/08C08K9/06C08L67/04
Inventor 董建廷李秋枫周霆宋治乾罗明华辛敏琦
Owner SHANGHAI KUMHOSUNNY JINSHAN PLASTICS CO LTD
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