Resin composition and preparation method thereof

A resin composition and resin technology, applied in the field of polymer resin and its preparation, can solve the problems of lack of pigments, affecting the appearance of products, etc., and achieve the effects of reducing streamlines and high market prospects

Inactive Publication Date: 2012-05-23
SHANGHAI KUMHO SUNNY PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The geometric shape of pigment particles often has a great influence on the optical effect of the product. For example, flake or silver dollar pigments are often polyhedral. During the molding process, the flow resistance of this type of pigment increases when encountering thin walls, screw holes or cavities. The accumulation of pigments in these areas and the lack of pigments in other areas greatly affect the appearance of the product; in addition, the vicinity of the gate and the surface of the product in injection molding are high-shear areas, which easily lead to the orientation of flake pigments, resulting in unsightly changes due to reflectivity changes. accepted colors

Method used

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  • Resin composition and preparation method thereof
  • Resin composition and preparation method thereof
  • Resin composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0053] 1) Premix part of PMMA (80%) with other components except metallic pigments and mineral oil in a high-speed mixer in a certain proportion for 5-10 minutes;

[0054] 2) Pre-mix the remaining PMMA (20%) and mineral oil in a low-speed mixer for 3-5 minutes in a certain proportion, then add metal pigments and mix for 5 minutes, so that the metal pigments can be evenly distributed in the resin;

[0055] 3) Through a twin-screw extruder, 1) is added from the upstream feeding port, and 2) is added from the downstream feeding port to carry out the steps of melt extrusion, drawing, cooling, and pelletizing to obtain a resin composition with excellent appearance .

Embodiment 6

[0079] A preparation method of a resin composition, characterized in that the method comprises the following steps:

[0080] (1) Prepare materials according to the following components and parts by weight: 100kg of transparent resin, 0.2kg of modifier for bridging structure, 0.3kg of metallic pigment, 0.3kg of lubricant, 0.1kg of antioxidant, and 0.1kg of mineral oil; in addition, It can also include 0.3kg of antistatic agent, wherein the transparent resin is commercially available PMMA, the modifier of the bridge structure is a cross-linked methacrylic acid copolymer, the microscopic shape is spherical, the particle size is 2 μm, the transparent resin and The refractive index difference of the modifier with bridging structure is 0.04, the rheological viscosity of the modifier with bridging structure is much larger than that of the selected transparent resin and metal aluminum pigment, the aspect ratio is 1:1, and the lubricant is silicone oil , the antioxidant is Irganox 1010...

Embodiment 7

[0085] A preparation method of resin composition, the method comprises the following steps:

[0086] (1) Prepare materials according to the following components and parts by weight: 100kg of translucent resin, 3kg of modifier of bridge structure, 4kg of metallic pigment, 2kg of lubricant, 1kg of antioxidant, 0.3kg of mineral oil; in addition, can also include 0.1kg of the mixture of flame retardant and light stabilizer, wherein the translucent resin is a commercially available GPPS and PETG mixture, the modifier of the bridge structure is a cross-linked cross-linked styrene copolymer, and the microscopic shape is spherical, The particle size is 150μm, the refractive index difference between the transparent resin and the modifier with bridge structure is 0.1, and the rheological viscosity of the modifier with bridge structure is much larger than the selected translucent resin and metal titanium oxide pigment. The ratio is 15:1, the lubricant is silicone oil, and the antioxidant...

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Abstract

The invention relates to a resin composition and a preparation method thereof. The resin composition comprises: by weight, 100 parts of resin, 0.2 to 3.0 parts of a bridge structure modifier, 0.3 to 4.0 parts of metal pigment, 0.3 to 2.0 parts of one or more lubricants, 0.1 to 1.0 part of one or more anti-oxidants and 0.1 to 0.3 parts of mineral oil. The preparation method comprises the following steps of mixing a part of the resin, the bridge structure modifier, the one or more lubricants and the one or more anti-oxidants according a certain ratio to obtain a mixture I, pre-mixing the rest of the resin and the mineral oil, adding the metal pigment into the mixture of the rest of the resin and the mineral oil to obtain a mixture II, adding the mixture I and the mixture II into a double screw extruder respectively from an upper feed inlet and a lower feed inlet, and carrying out melting extrusion, drawing, cooling and cutting to obtain the resin composition. The resin composition obtained by the preparation method has an excellent appearance, and solves the problem that when transparent or semitransparent resin is mixed with metal pigment having a certain length-diameter ratio, a streamline or a fusion line can be produced. The resin composition can be utilized for production of streamline-free resin compositions which are flashy or have metal luster.

Description

technical field [0001] The invention relates to a polymer resin and a preparation method thereof, in particular to a resin composition and a preparation method thereof. Background technique [0002] In recent years, consumer products have created a strong demand for plastics with unique colors and appearances. For example, the current appearance products with shimmering effect and metallic texture are more and more favored by consumers. Compared with the traditional single tone, this unique appearance can bring great visual impact to people, so that consumers can enjoy For its aesthetic design, we call this material Aesthetic Resin. [0003] The traditional technical solution of aesthetic resin is to post-process the molded product. The most used is the spraying process. Pearlescent paint, metallic paint, etc. can be selected according to the needs of the product. However, there are many limitations in the spraying process, such as complex procedures and high requirements ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08L25/12C08L69/00C08L55/02C08L25/08C08L25/06C08L67/02C08K13/02C08K3/22C08K3/34C08K3/40
Inventor 宋治乾徐建荣周赞罗明华辛敏琦
Owner SHANGHAI KUMHO SUNNY PLASTICS
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