Foamable polyolefin and polystyrene blend particles and preparation method thereof

A polystyrene and styrene polymer technology, applied in the field of foam materials, can solve the problems of poor product performance and low graft rate, and achieve the effects of excellent product performance, excellent toughness and high compressive strength

Inactive Publication Date: 2017-09-19
TIANJIN DALIN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After these expandable particles are put into the pre-expanding machine and foamed to a suitable density, they are added to the molding machine to prepare foam products; Chinese invention patent publication CN 106280046 A discloses a production method of pre-expanded EPO beads. The performance of the product is poor, and the grafting rate is low

Method used

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  • Foamable polyolefin and polystyrene blend particles and preparation method thereof
  • Foamable polyolefin and polystyrene blend particles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 80 parts by weight of PS, 10 parts by weight of LDPE, 5 parts by weight of POE, 1.2 parts by weight of trimethylchlorosilane, 0.8 parts by weight of aluminum trichloride and 2 parts by weight of talcum powder, and then put into Melt and mix in a twin-screw extruder, the body temperature of the extruder is 220° C., and the rotation speed is 50 rpm. Inject 6 parts by weight of foaming agent into the polymer melt in the middle section of the extruder, and mix the foaming agent and various components evenly under the action of the twin-screw, and further mix the ingredients uniformly with the help of a static mixer , lower the temperature to 180°C, pressurize the melt pump, extrude the polymer melt at 80kg / h under a pressure of 200kg, and pelletize it through an underwater pelletizer. During granulation, the aperture of the die is 0.4mm, the water temperature is 40°C, and the water pressure is 3 kg. Expandable EPO particles containing foaming agent and narrow particl...

Embodiment 2

[0034] The raw materials are basically the same as in Example 1, and 4 parts by weight of styrene monomer and 5 parts by weight of SBS are added in the raw material premixing stage. All the other steps and technology are identical with embodiment 1. The performance indexes of the expanded particles prepared in this example are shown in Table 1.

Embodiment 3

[0036] The raw materials are basically the same as in Example 1, 3 parts by weight of styrene monomer and 1 part by weight of acrylic acid monomer are added in the raw material premixing stage, and trimethylchlorosilane and aluminum trichloride are not added at the same time. All the other steps and technology are identical with embodiment 1. The performance indexes of the expanded particles prepared in this example are shown in Table 1.

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Abstract

The invention provides foamable polyolefin and polystyrene blend particles and a preparation method thereof. The foamable polyolefin and polystyrene blend particles are prepared from components in parts by weight as follows: 30-90 parts of styrene polymer resin, 10-60 parts of low-density polyethylene resin, 2-20 parts of polyolefin elastomers, 0-15 parts of a phase solubilizer, 0-3 parts of an initiating agent, 0-10 parts of reactive monomers, 0.5-5 parts of a nucleating agent and 5-20 parts of a foaming agent. Various mold goods can be prepared from the foamable polyolefin and polystyrene blend particles through thermal forming or rubber molding, and a product is high in compression strength, energy absorptivity and strength and excellent in toughness, shock resistance, bending resistance and thermal insulation performance; the foamable polyolefin and polystyrene blend particles are free of plasticizers and VOC (volatile organic compound) and can be used as buffer devices, packaging materials, automotive interior parts, thermal insulation materials and the like.

Description

technical field [0001] The invention belongs to the field of foaming materials, in particular to particles of expandable polyolefin and polystyrene blends and a preparation method thereof. Background technique [0002] The polyolefin / polystyrene foam material has the advantages of light weight, high strength, good toughness, and good impact resistance. As a packaging material, it is widely used in high-end fields such as electronic devices and optical devices, and has a high market prospect. Foam particles involving polyolefin / styrene polymer mixtures and their preparation methods are mainly involved in the following patents, such as 200580027165.7, 200780006752.7, 200480003270.2, 200980153544.9 and 200980153542.X. There are two main preparation methods. Japanese manufacturers represented by JSP and KANEKA prepare polyethylene / polystyrene mixture masterbatches by chemically synthesizing styrene monomer and polyolefin in the reactor, and then Soak the foaming agent to form ...

Claims

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Application Information

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IPC IPC(8): C08L25/06C08L23/06C08L23/08C08L53/02C08L51/06C08K3/34C08J9/14
CPCC08L25/06C08J9/141C08J2203/14C08J2203/182C08J2325/06C08J2423/06C08L2203/14C08L2205/02C08L2205/03C08L2205/035C08L2205/08C08L2205/24C08L2207/02C08L2207/066C08L23/06C08L23/0815C08K3/34C08L53/02C08L51/06C08L53/025
Inventor 冷栋梁闫达陈丁猛杨丽含刘东方常秀娟
Owner TIANJIN DALIN NEW MATERIAL TECH
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