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A kind of spray-free metal texture PMMA modified material and preparation method thereof

A metal texture and modified material technology, which is applied in the field of spray-free metal texture PMMA modified materials and its preparation, can solve the problems of poor processing performance, decreased toughness, and poor fluidity, and achieve excellent toughness and processing performance. Texture, environment-friendly effect

Active Publication Date: 2015-07-29
QINGDAO RICH PLASTIC NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polymethyl methacrylate (PMMA) is a kind of commonly used engineering plastics. It has the advantages of high transparency, good weather resistance, high surface hardness and good mechanical strength. PMMA is used as the base material to add coated metal aluminum powder and pearlescent pigments. The surface of the obtained material has a good metallic texture, but due to the poor impact resistance of PMMA, and the addition of metallic aluminum powder and pearlescent pigments, the toughness of the material is further reduced, which affects the use of the material. Therefore, some people try to add it. Methyl acrylate / butadiene / styrene copolymer (MBS) and core-shell acrylate copolymer (ACR) were used to modify the material, and the toughness of the obtained material was improved to a certain extent, but due to MBS , ACR and PMMA have large differences in chemical composition, and their mixtures cannot form a stable homogeneous system. In addition, the rubber components contained in MBS and ACR have poor fluidity, resulting in a decrease in the plasticity of the material and poor processing performance. The surface of the product is often prone to serious flow marks, which greatly affects the appearance of the product

Method used

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  • A kind of spray-free metal texture PMMA modified material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] Add 61kg of PMMA, 30kg of MBS, 5kg of MS, 1kg of coated metal aluminum powder, 1kg of pearlescent pigment, 1.2kg of modified EBS, 0.2kg of antioxidant 1010, 0.2kg of antioxidant 168, and 0.4kg of ZnSt into the high-speed mixer , set the speed at 200r / min, mix for 5 minutes, after mixing evenly, accurately measure and feed with a screw feeder, knead and extrude in a twin-screw extruder, the screw length-to-diameter ratio is 40:1, Set the speed of the main machine to 300r / min, the temperature of the 1st-3rd stage of the extruder is 200°C, the 4th-7th stage is 210°C, and the 8th-10th stage is 220°C. After cooling and pelletizing, the product is obtained.

[0033] Note: the coated metal aluminum powder of this embodiment is SiO 2 Coated aluminum powder, the diameter of the aluminum powder is 60-100 μm, and the ratio of diameter to thickness is 40-80:1; the outer coating material of the pearlescent pigment is nano-sized TiO 2 , the same below.

Embodiment 2

[0035] The difference between this embodiment and embodiment 1 is: with PMMA 62kg, MABS 30kg, MS 5kg, coated metal aluminum powder 1kg, pearlescent pigment 1kg, modified EBS 0.5kg, antioxidant 1010 0.3 kg, ZnSt 0.2kg, add In the high-speed mixer, the set speed is 300r / min, and the mixture is mixed for 2 minutes. After the mixing is uniform, the screw feeder is used to accurately measure and feed the materials, and the twin-screw extruder is mixed and extruded. The screw length-to-diameter ratio is 40:1, set the speed of the main engine to 300r / min, the temperature of the 1st-3rd stage of the extruder is 210°C, the 4th-7th stage is 220°C, the 8th-10th stage is 230°C, after cooling and pelletizing, you can get product.

Embodiment 3

[0037] The difference between this embodiment and embodiment 1 is: PMMA 54kg, MBS 20kg, MABS 15kg, MS 6kg, coated metal aluminum powder 2kg, pearlescent pigment 1kg, modified EBS 1.2kg, antioxidant 1076 0.2 kg, antioxidant Add 0.2kg of agent 245, 0.4kg of ZnSt, and 0.01kg of phthalocyanine blue pigment into a high-speed mixer, set the speed at 200r / min, and mix for 5 minutes. After mixing evenly, use a screw feeder to accurately measure and feed. Mixing and extrusion in a twin-screw extruder, the length-to-diameter ratio of the screw is 40:1, the speed of the main engine is set to 350r / min, the temperature of the 1-3 section of the extruder is 200°C, the 4-7 section is 210°C, 8 The -10 section is 220°C, and after cooling and pelletizing, the product is obtained.

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Abstract

The invention discloses a spraying-free metallic PMMA (polymethyl methacrylate) modified material and a preparation method thereof. The method comprises the steps that the PMMA is used as a matrix resin raw material, MBS (methyl methacrylate), MABS (methyl methacrylate / acrylonitrile / butadiene / styrene / copolymer) and ACR (acrylate copolymer with core-shell structure) are taken as toughening agents, MS (methyl methacrylate / styrene copolymer) is taken as a processing modifying additive, aluminum powder coated with metals and pearlescent pigments which enable materials to be metallic are added, a certain quantity of dispersing agents, a small quantity of antioxidant agents, a lubricating agent, pigments and the like are supplemented, after the materials are uniformly mixed in the proportion, the materials are milled by a parallel double-screw extrusion machine, and a spraying-free metallic PMMA modified material is formed. The material and PVC (polyvinyl chloride) are subjected to compound co-extrusion, so that the surface of the prepared product has an excellent metallic effect; and compared with traditional spraying products, the spraying-free metallic PMMA modified material has the advantages of low cost, environment friendliness, scratch resistance, recycle and the like, therefore, the spraying-free metallic PMMA modified material is particularly suitable for being processed into lateral trim workpieces of refrigerators.

Description

technical field [0001] The invention belongs to the technical field of polymer material modification, and in particular relates to a spray-free metal texture PMMA modified material and a preparation method thereof. Background technique [0002] In recent years, with the continuous enhancement of people's awareness of environmental protection, more and more people pay attention to plastic materials without spraying metal texture. In order to make plastics have a metal texture, when modifying ordinary plastic raw materials, adding metal aluminum powder is At present, the more common practice is that the aluminum powder is actually tiny aluminum flakes, which are dispersed into the matrix resin and parallel to the substrate. Many aluminum powders are connected to each other, and the large and small particles fill each other to form a continuous metal film, covering the The substrate has a metallic texture. If pearlescent pigments are added at the same time, the metallic textur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/12C08L51/00C08K13/06C08K9/10C08K3/08
Inventor 牛茂平刘机关赵宁金海木欧阳晓琛陈文礼
Owner QINGDAO RICH PLASTIC NEW MATERIAL
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