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Epoxy ethylene-octene copolymer composition and preparation method thereof

A technology of octene copolymer and epoxidized ethylene, which is applied in the field of epoxidized ethylene-octene copolymer composition and its preparation, and can solve the problems of complex reaction system, reduction of POE crosslinking degree, cumbersome operation, etc.

Active Publication Date: 2020-10-27
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the melt fluidity of POE and reduce its degree of cross-linking, Chinese patent (CN 101747600 B) captures and quenches the molecular chains of POE by adding anti-crosslinking agent triphenyl phosphite or dimethylformamide. Free radicals reduce the degree of crosslinking of POE, but this method hinders the grafting reaction, resulting in a lower grafting rate of the obtained product
Chinese patent (CN 102391432 B) discloses a high fluidity ethylene-α-octene graft copolymer and its preparation method. They select a high fluidity POE resin and add lubricants and antioxidants to the system , liquid additives and other additives to inhibit the crosslinking of POE during extrusion, but more additives are added, the reaction system is more complicated, and the reaction is difficult to control
In order to improve the dispersion of monomers and initiators in the resin, the Chinese patent (CN 106674432 A) starts from the extrusion reaction device. They adopt the method of staged feeding, and the reaction monomers and initiators are placed in the second or second twin-screw. Five-stage addition reduces the generation of cross-linked by-products in the process of polymer melt grafting, but the preparation method is cumbersome
Chinese patent (CN 104479078 A) also adopts the composite method of casting film forming equipment and twin-screw extrusion equipment, spraying monomer and initiator through polymer after casting film forming, and then performing twin-screw reactive extrusion method , reducing the uneven dispersion of monomers and the occurrence of cross-linking side reactions during the reaction process, but these operations are cumbersome and require multiple operations, and special equipment is also required

Method used

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  • Epoxy ethylene-octene copolymer composition and preparation method thereof
  • Epoxy ethylene-octene copolymer composition and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 94.0% POE resin (density 0.870 g / cm -3 , with a melt index of 5g / 10min), 3.0% GMA, 1.5% styrene, 0.3% 2,5-di-tert-butylperoxy-2,5-dimethylhexane (melting point below 8°C) and 1.2% Talc powder (particle size D90=5 microns) is mixed evenly in the high-speed mixer, and then fed into the twin-screw extruder through the feeding hopper for reactive extrusion. The length-to-diameter ratio of the twin-screw extruder used is L / D= 36. The extrusion temperatures of the first to ninth stages are: 60°C, 100°C, 190°C, 190°C, 190°C, 190°C, 200°C, 210°C, 170°C, the screw speed is 250 rpm, and the material E-POE-1 can be obtained after melt plasticization, extrusion, drying and pelletizing.

Embodiment 2

[0027] 94.0% POE resin (density 0.870 g / cm -3 , melt index is 5g / 10min), 3.0% GMA, 1.5% styrene, 0.3% dicumyl peroxide (DCP, melting point is 42°C) and 1.2% talc powder (particle size D90=5 microns) at high speed After the mixer is mixed evenly, it is fed into the twin-screw extruder through the feeding hopper for reactive extrusion. The length-to-diameter ratio of the twin-screw extruder used is L / D=36, and the extrusion temperatures of the first to ninth stages are respectively : 60°C, 100°C, 190°C, 190°C, 190°C, 190°C, 200°C, 210°C, 170°C, the screw speed is 250 rpm, the material is melted and plasticized, extruded, dried and pelletized E-POE-2 is available.

Embodiment 3

[0029] 94.0% POE resin (density 0.870 g / cm -3 , with a melt index of 5g / 10min), 3.0% GMA, 1.5% styrene, 0.3% 2,5-di-tert-butylperoxy-2,5-dimethylhexane (melting point below 8°C) and 1.2% Talc powder (particle size D90=20 microns) is uniformly mixed in the high-speed mixer, and then fed into the twin-screw extruder through the feeding hopper for reactive extrusion. The length-to-diameter ratio of the twin-screw extruder used is L / D= 36. The extrusion temperatures of the first to ninth stages are: 60°C, 100°C, 190°C, 190°C, 190°C, 190°C, 200°C, 210°C, 170°C, the screw speed is 250 rpm, and the material E-POE-3 can be obtained after melt plasticization, extrusion, drying and pelletizing.

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Abstract

The invention provides an ethylene oxide-octene copolymer composition, which comprises the following components by weight: 0.2%-10.0% of a styrene monomer, 0.5%-10.0% of a glycidyl methacrylate monomer and / or glycidyl methacrylate derivative monomer, 70.0%-99.0% of an ethylene-octene copolymer and 0.2%-10.0% of talcum powder. According to the invention, by adding the talcum powder, the grafting rate of the ethylene oxide-octene copolymer is guaranteed while the cross-linking degree is reduced; and the melting point of the initiator is further optimized, so that the cross-linking degree is further reduced.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to an epoxidized ethylene-octene copolymer composition and a preparation method thereof. Background technique [0002] Ethylene-octene copolymer (POE) is a new type of thermoplastic elastomer developed with metallocene, which has the plasticity of plastic and the elasticity of rubber. POE is mainly composed of polyethylene crystalline region and polyoctene amorphous region. This special structure endows POE with excellent mechanical properties, rheological properties and UV resistance. In addition, POE has good low-temperature toughness, good compatibility with polyolefins, and low price, so it is widely used in plastic toughening modification. [0003] Using glycidyl methacrylate (GMA) as a monomer and using twin-screws to melt-graft POE is the simplest and most effective method. However, in the process of melt grafting, on the one hand, the liquid GMA monomer is not un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08F220/32C08F212/08C08F2/44C08K3/34
CPCC08F255/02C08F2/44C08K3/34C08F212/08
Inventor 李坤泉柴生勇李积德陈林刘勤李岩刘振峰汪廷洪
Owner KINGFA SCI & TECH CO LTD
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