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Polypropylene foam particle and preparation method thereof

A technology of expanded particles and polypropylene, which is applied in the field of polypropylene expanded particles and its preparation, can solve problems such as negative environmental impact, small output, and environmental pollution, and achieve the effects of saving production costs, small capacity, and good performance

Active Publication Date: 2014-11-12
武汉德冠新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent No. CN 1228365C "Manufacturing Method of Polypropylene Resin Expanded Particles" The polypropylene resin particles impregnated with a physical foaming agent heated together with an aqueous medium and a dispersant are discharged from a closed container in a low-pressure area , making it foamed to obtain foamed particles, this method produces a large amount of waste water; Japan JSP company patents ZL01819174.6, ZL02826640.4, ZL 200410061513.X, ZL 200410063190.8 describe a kind of production of polypropylene foam beads by kettle method The method of granulation will leave peroxides and their decomposition products in the foamed products. These release agents, peroxides and their decomposition products will not only have a serious negative impact on the environment, but some will also affect the service life of the product. Therefore, there is no Very good application prospect
The patent with the authorized notification number CN 101613487 B discloses a method for preparing a crystalline high polymer physical foaming material, but the method feeds only 1 / 25 of the volume of the kettle body at one time, and the output is small. There is no spacer between the particles, and there is no stirring, the particles are easy to stick, and the particles with good dispersion cannot be obtained
The patent with authorized notification number CN1271125C discloses a kind of expanded polypropylene resin beads and its production process, but this process produces a large amount of waste water during the production process, which is easy to cause environmental pollution
Patent CN200910059991 is to place polypropylene particles in an autoclave and add a physical foaming agent to quickly release the pressure to achieve foaming. Although this method does not produce waste water, the polypropylene particles are prone to adhesion when foaming in the autoclave, and it is not easy to obtain Beads that do not stick to each other

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of modified polypropylene small particles: 100 parts of 1# polypropylene resin, 5 parts of amorphous α-olefin copolymer (APAO, viscosity (190°C): 50000 cP) and particle size selected from Table 1 50 mesh, 2 parts of polyethylene micropowder with a weight-average molecular weight of 800,000, 1 part of decabromodiphenylethane and 0.1 part of antioxidant 1010, mixed by a high-speed mixer, extruded by an extruder, and cut into water-cooled strands Small particles with a growth of 1-3mm and a diameter of 0.5-1.5mm.

[0029] (2) Preparation of expanded particles: Add 100 parts of small modified polypropylene particles described in step (1) and 200 parts of calcium carbonate with a particle size of 10 mesh into a 3-liter autoclave, start the stirrer, and rotate at 600 rpm / min, start to heat up to 142 °C at 3 °C per minute, and then introduce carbon dioxide to make the pressure in the autoclave reach 5 MPa. The expanded polypropylene beads can be obtained, an...

Embodiment 2

[0031] (1) Preparation of small modified polypropylene particles: 100 parts of 1# polypropylene resin, 8 parts of amorphous α-olefin copolymer (APAO, viscosity (190°C): 70000 cP) and particle size selected from Table 1 0.1 part of polyethylene micropowder with a weight average molecular weight of 1 million, 10 parts of decabromodiphenyl ether, 0.1 part of antioxidant 168 and 0.1 part of antioxidant 1010, mixed by a high-speed mixer and extruded by an extruder The water-cooled strips are cut into small particles with a growth of 1-3mm and a diameter of 0.5-1.5mm.

[0032] (2) Preparation of expanded particles: Add 100 parts of small modified polypropylene particles described in step (1) and 300 parts of kaolin with a particle size of 50 mesh into a 3-liter autoclave, start the stirrer, and rotate at 600 rpm At 3°C ​​per minute, start to heat up to 125°C and then introduce carbon dioxide to make the pressure in the autoclave reach 3MPa. After keeping the pressure for 30 minutes,...

Embodiment 3

[0034] (1) Preparation of small modified polypropylene particles: 100 parts of 1# polypropylene resin in Table 1, 10 parts of amorphous α-olefin copolymer (APAO, viscosity (190°C): 9000 cP), particle size 500 mesh, 3 parts of polyethylene micropowder with a weight average molecular weight of 4 million, 20 parts of red phosphorus and 0.4 part of antioxidant 330, mixed by a high-speed mixer, extruded through an extruder, and cut into pellets of 1-3mm in length , Small particles with a diameter of 0.5-1.5 mm.

[0035](2) Preparation of expanded particles: Add 100 parts of small modified polypropylene particles described in step (1) and 200 parts of sodium chloride with a particle size of 20 mesh into a 3-liter autoclave, start the agitator, and rotate at 600 Turn per minute, start to heat up to 122°C at 3°C ​​per minute, and then introduce nitrogen to make the pressure in the autoclave reach 15MPa. After holding the pressure for 30 minutes, open one end of the discharge port of t...

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Abstract

The invention relates to a polypropylene foam particle and a preparation method thereof. The polypropylene foam particle comprises the following components in parts by weight: 100 parts of polypropylene, 5-10 parts of an amorphous state alpha-olefin copolymer (APAO) or petroleum resin, 0.1-3 parts of a nucleating agent, 1-20 parts of a fire retardant and 0.1-0.4 part of an antioxidant. The components are extruded by a mixing extruder, and are cooled by water, braced and cut into particles, so as to obtain small modified polypropylene particles; inorganic powder, the small modified polypropylene particles and a physical foaming agent are discharged at low pressure after being heated in a high-pressure kettle, and are foamed, so as to obtain the polypropylene foam particles. Inorganic powder adopted by the method disclosed by the invention can be recycled, so that the production cost is saved, the prepared polypropylene foam particle is non-sticky, good in performance, small in capacity, free of wastewater generated in the whole production process, free of environmental pollution, and applicable to industrial production, and the foam density is smaller than 0.2g / cm<3> in the foaming process.

Description

technical field [0001] The invention relates to the technical field of polymer foam materials, and more specifically, the invention relates to a polypropylene foam particle and a preparation method thereof. Background technique [0002] Polypropylene foamed particles are a high-performance high-crystalline polymer / gas composite material. With its unique and superior performance, it has become the fastest growing environmentally friendly new pressure-resistant buffer heat insulation material. Products made of polypropylene expanded particles have excellent shock resistance and energy absorption performance, high recovery rate after deformation, good heat resistance, chemical resistance, oil resistance and heat insulation. In addition, it is light in weight and can be large Significantly reduce the weight of items. At the same time, it is also an environmentally friendly material, which can not only be recycled and reused, but also can be naturally degraded without causing wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/00C08L57/02C08K13/02C08K3/26C08K3/34C08K3/16C08J9/18
CPCC08J9/18C08J2323/12C08J2323/14C08J2423/00C08J2457/02C08L23/12C08L23/14C08L2203/14C08L2205/03C08L23/00C08L23/06C08K13/02C08K5/03C08K5/1345C08K2003/265C08K5/06C08K5/526C08K3/346C08K2003/026C08K5/13C08K3/16C08L57/02C08K2003/2224C08K2003/2227C08K3/34
Inventor 胡圣飞
Owner 武汉德冠新材料科技有限公司
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