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Low-creep high-toughness cycloolefin copolymer composite material and preparation method thereof

A technology of cycloolefin copolymers and composite materials, which is applied in the field of engineering plastics, can solve the problems of poor toughness of recycled materials, and achieve the effects of prolonging the service life, expanding the scope of use, and improving the use efficiency

Active Publication Date: 2022-05-13
XIAMEN MAKE LOCKS MFGR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recycled COC or recycled COP materials refer to COC or COP materials produced after scrapping, but due to the poor toughness of recycled materials, it needs to be toughened and modified to meet its application as injection molded parts

Method used

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  • Low-creep high-toughness cycloolefin copolymer composite material and preparation method thereof
  • Low-creep high-toughness cycloolefin copolymer composite material and preparation method thereof
  • Low-creep high-toughness cycloolefin copolymer composite material and preparation method thereof

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Experimental program
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Effect test

preparation example Construction

[0029] The preparation steps of the toughening modifier: (1) Weigh 100 parts by weight of cycloolefin copolymer resin COC or COP, 50 parts by weight to 160 parts by weight of the toughening agent, the toughening agent is selected from POE, SEBS, One or more compositions of SEPS and OBC; (2) Melt and mix the above raw materials in a twin-screw extruder; (3) Put the blended material into an internal mixer, and add 1 to 5 parts by weight part of free radical initiator, and react for 5 to 25 minutes at a melting temperature of 180°C to 240°C; (4) After the mixed material is unloaded from the internal mixer, a single-screw extruder is used to prepare uniform granular materials.

[0030]Melt grafting is a reaction in which the primary free radicals generated by the initiator capture the hydrogen atoms on the hydrocarbon chain and generate macromolecular free radicals to initiate monomer polymerization. The reaction temperature is generally above the melting point or softening point ...

Embodiment 1

[0036] Example 1 (1) Preparation of POE toughening modifier: 5kg of POE, add 4kg cycloolefin copolymer (COC), fully mix in high-speed mixer, add twin-screw extruder, at 180 ℃ ~ 240 Under the condition of ℃, fully melt and mix. Then, put the resin into the internal mixer, add 100g of peroxide initiator (BIPP), and react for 25min in the molten state at 200°C. After the reaction is completed, a single-screw extruder is used to prepare uniform granular materials. COC can also be adjusted to COP, and POE toughening modifiers can be prepared according to the above component ratios and steps.

[0037] (2) Testing the grafting rate of POE: the product was fully extracted with toluene, and the yield of coagulation was less than 1%. Use cyclohexane to realize the separation of POE and COC materials, and measure the grafting rate of POE by gravimetric method, and the grafting rate of COC molecular chains on POE molecular chains is >4.7%. The grafting rate generally refers to the weigh...

Embodiment 2

[0038] Embodiment 2 (1) Preparation of SEBS toughening modifier: 5kg of SEBS, add 4kg cycloolefin copolymer (COC), after fully mixing in high-speed mixer, add twin-screw extruder, at 180 ℃~240 Under the condition of ℃, fully melt and mix. Then, put the resin into the internal mixer, add 120g of peroxide initiator (BIPP), and react for 25min in molten state at 200°C. After the reaction is completed, use a single-screw extruder to prepare uniform granular materials. COC can also be adjusted to COP, and SEBS toughening modifiers can be prepared according to the above-mentioned component ratios and steps.

[0039] (2) Test the grafting rate of SEBS: use toluene to fully extract the product, and the yield of coagulation is less than 0.8%. SEBS and COC materials were separated by cyclohexane, and the grafting rate of SEBS was tested by gravimetric method. The grafting rate of COC molecular chains on SEBS molecular chains was >6.4%.

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Abstract

The invention discloses a low-creep high-toughness cycloolefin copolymer composite material which comprises the following components in parts by weight: 100 parts of cycloolefin copolymer resin or derivatives thereof, 5-30 parts of a toughening modifier and 0.1-3 parts of an anti-aging agent. The invention also provides a preparation method of the cycloolefin copolymer. The preparation method comprises the following steps: firstly, preparing the toughening modifier by using a melt grafting method, and then preparing the toughening modifier and cycloolefin copolymer resin or derivatives thereof into the low-creep high-toughness cycloolefin copolymer composite material by using a twin-screw extruder. The recycled cycloolefin copolymer can be used as a main raw material, so that the toughness of the recycled material is improved, the problem of resource shortage is solved, and the environmental problem is also solved.

Description

technical field [0001] The invention relates to the field of engineering plastics, in particular to a cycloolefin polymer with low creep and high toughness and a preparation method thereof. Background technique [0002] Engineering plastics have been widely used in various fields of production and life, not only put forward higher requirements for their strength, but also put forward higher and higher requirements for the dimensional stability of their products with the continuous expansion of application fields. However, the creep characteristics of polymer materials under stress conditions lead to weak dimensional stability of conventional engineering plastics, such as ABS and other materials. Although this creep performance can be improved by adding glass fibers, mineral fillers, etc., for some The demand for products with high gloss and high fluidity, and its creep performance have always been the key issues restricting the popularization of conventional engineering plas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L45/00C08L87/00
CPCC08L45/00C08L87/005Y02W30/62
Inventor 潘爱玉林辉吴峰
Owner XIAMEN MAKE LOCKS MFGR CO LTD
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