High-fluidity ethylene-alpha-octene graft copolymer and preparation method thereof

A technology of graft copolymer and octene copolymer, which is applied in the field of modified polymer copolymer and its preparation, can solve the problems of low production cost, reduced fluidity, inconvenient large-scale production, etc., and achieve easy mixing and granulation , Good notched impact performance, short reaction residence time

Inactive Publication Date: 2012-03-28
SHANGHAI SUNNY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Nylon (PA) ranks first among the five general-purpose engineering plastics. It is flexible, wear-resistant, high in mechanical strength, good in heat resistance, and excellent in flow processability. At the same time, nylon is a crystalline polymer that will There is a sharp yield point, and after passing the yield point, the stress will gradually increase with the increase of the strain. Therefore, unmodified nylon cannot be used in the fields of automotive interior and exterior trims, bumpers, and railway equipment, and its ductility is required. , Notched impact strength is modified, but the impact strength of the modified toughened nylon can meet the requirements of use, but some parts used in the fields of automotive interior and exterior trims have the characteristics of thinner walls and larger sizes. Conventional The POE grafted copolymer will drastically reduce the flow properties of nylon, which will affect the performance of the final product, especially product defects such as insufficient injection molding and warping.
[0004] Currently commonly used to prepare ethylene- -The method of octene graft copolymer has solution method, irradiation method, mechanical force method and melting method etc., and the used reaction device of solution method is complicated, needs to use a large amount of solvents, is unfavorable for environmental protection and is not easy to large-scale production; Irradiation Many methods react on the surface of the polymer, requiring irradiation equipment, and the reaction is not uniform; the grafting rate of the mechanical method is very low, most of which are lower than 0.5wt%; the melt grafting method has simple reactions, simple operation process, and equipment investment Less, continuous operation, low production cost

Method used

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  • High-fluidity ethylene-alpha-octene graft copolymer and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh the following components according to parts by weight: 100 parts of POE resin (DOW, ENGAGE 8200, MI (melt index)=5.0g / 10min), 2 parts of maleic anhydride as the grafting monomer, and diisopropyl peroxide as the initiator 0.1 part of benzene, 0.3 part of stearate, 0.3 part of antioxidant, 0.2 part of wax oil.

[0032] Put the other components except the initiator into the high-speed mixer according to the proportion and mix for 5 minutes. After the main feed is metered, they are added to the twin-screw extruder. The initiator is metered through the side feed and then added to the extruder. , The temperature of each section of the extruder from the feeding port to the head is set between 100°C and 200°C, the screw speed is controlled at 300 rpm, the screw length to diameter ratio is 48:1, and the mixture is melted and plasticized , Kneading and mixing, extruding with head, drawing, cooling, pelletizing, drying to obtain products.

Embodiment 2

[0034] Weigh the following components according to parts by weight: 100 parts of POE resin (DOW, ENGAGE 8402, MI=30.0g / 10min), 3 parts of glycidyl methacrylate as the grafting monomer, and 2,5-dimethyl methacrylate as the initiator Base-2,5-di-tert-butyl hexane and dicumyl peroxide constitute 0.15 parts, PE wax 0.4 parts, 1010 and 168 are antioxidants 0.4 parts, and white oil is 0.1 parts.

[0035] Put the other components except the initiator into the high-speed mixer according to the proportion and mix for 8 minutes. After the main feed is metered, they are added to the twin-screw extruder. The initiator is metered through the side feed and then added to the extruder. , The temperature of each section of the extruder from the feeding port to the head is set between 80°C and 180°C, the screw speed is controlled at 400 rpm, the screw length to diameter ratio is 52:1, and the mixture is melted and plasticized , Kneading and mixing, extruding with head, drawing, cooling, pelletizin...

Embodiment 3

[0037] Weigh the following components according to parts by weight: 100 parts of POE resin (DOW, ENGAGE 8130 MI=13.0g / 10min), 3 parts of maleic anhydride and glycidyl methacrylate (1:2) as the grafting monomer, and start The agent is 0.2 parts of bis(tert-butylperoxyisopropyl)benzene, 0.4 parts of stearate, 0.4 parts of antioxidants for 1010 and 168, and 0.2 parts of white oil.

[0038] Put the other components except the initiator into the high-speed mixer according to the proportion and mix for 3 minutes. After the main feed is metered, they are added to the twin-screw extruder. The initiator is metered through the side feed and then added to the extruder. , The temperature of each section of the extruder from the feeding port to the head is set between 110°C and 220°C, the screw speed is controlled at 200 rpm, the screw length to diameter ratio is 36:1, and the mixture is melted and plasticized , Kneading and mixing, extruding with head, drawing, cooling, pelletizing, drying t...

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Abstract

The invention relates to a high-fluidity ethylene-alpha-octene graft copolymer and a preparation method thereof. The copolymer is a graft copolymer, and comprises the following components by weight part: 100 parts of high-fluidity ethylene-alpha-octene copolymer (POE) resin, 0.5 to 5 parts of graft monomer, 0.01 to 2 parts of initiator, 0.1 to 1 part of lubricant, 0.1 to 1 part of antioxidant and 0.1 to 2 parts of liquid additive. Other components except the initiator are put in a high-speed mixer to be mixed in proportion and are added to a twin-screw extruder through a main feeder, and the initiator is added to the extruder through a side feeder to granulate to obtain a product. Compared with the prior art, through the side feeding technology, the high-fluidity POE graft copolymer has higher grafting yield and lower gel content; and in addition, because of the high fluidity of the graft copolymer, after being applied to nylon, the graft copolymer has better fluidity than that of the traditional toughener after the toughener is applied to the nylon, and has excellent comprehensive mechanical properties and impact properties.

Description

technical field [0001] The present invention relates to a kind of modified macromolecule copolymer and preparation method thereof, especially relate to a kind of high fluidity ethylene- -Octene graft copolymer and preparation method. Background technique [0002] Vinyl- -Octene copolymer (POE) is a metallocene-catalyzed new type of polyolefin thermoplastic elastomer with narrow relative molecular mass distribution and narrow comonomer distribution and controllable structure. POE resin has both the thermoplasticity of plastic and the crosslinkability of rubber. It can compete with polymers such as ethylene-vinyl acetate copolymer, EPDM rubber, thermoplastic styrene-butadiene rubber, butadiene rubber, and ethylene-acrylate copolymer in many fields, and its advantages are reflected in both price and performance. POE is composed of ethylene and -Octene copolymerization, control the molecular weight and the content of different comonomers, you can get POE products with dif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/08C08F255/02C08F222/06C08F220/32C08L77/06B29B9/06B29C47/92B29C48/92
CPCB29C48/40B29C48/625B29C48/92B29C2948/92704B29C2948/92904
Inventor 苏吉英黄晓明娄小安
Owner SHANGHAI SUNNY
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