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Epoxy oligomer chain extender and preparation method thereof

An oligomer and epoxy technology, used in the field of chain extenders and their preparation, can solve the problems of insignificant improvement of impact strength of polyester materials, affecting the development of PET recycling industry, gel of chain extension products, etc. Compatibility, narrow molecular weight distribution of products, and the effect of reducing side reactions

Active Publication Date: 2014-04-30
GUANGZHOU LUSHAN NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the chain extenders on the market include oxazolines, epoxy resins, isocyanates, and acid anhydrides. They are mainly small molecule chain extenders. Traditional small molecule chain extenders have poor water resistance and chain extension product gel, etc. shortcoming
In addition to the above disadvantages, the impact strength of the polyester material after viscosification is not significantly improved by small molecule chain extenders.
The above shortcomings have seriously affected the development of the domestic PET recycling industry

Method used

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  • Epoxy oligomer chain extender and preparation method thereof
  • Epoxy oligomer chain extender and preparation method thereof
  • Epoxy oligomer chain extender and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] formula

[0026]

[0027] synthetic route

[0028] In a 500ml three-necked round-bottom flask, add 300ml of distilled water, and at the same time add an emulsifier with a total monomer mass of 0.2g, and heat to a constant temperature of 120°C. Then weigh the raw materials according to the above proportioning ratio, and the total mass of the monomers is 100g. After mixing the above raw materials evenly, add them into the reaction bottle at one time. N2 protection, stirring, and constant temperature reaction at 120°C for 2 hours to obtain a crude product, then collect white particles, carry out suction filtration, and wash with hot distilled water twice, and vacuum dry at 60°C for 12 hours to obtain the epoxy compound of the present invention. Oligomer chain extender products.

[0029] The epoxy oligomer chain extender of the present invention is used for the reaction extrusion chain extension of recycled PET, the recycled PET does not need to be dried, the molecula...

Embodiment 2

[0031] formula

[0032]

[0033] synthetic route

[0034] In a 500ml three-necked round-bottom flask, add 400ml of distilled water, and at the same time add an emulsifier with a total mass of 0.3g of monomers, and heat to a constant temperature of 150°C. Then weigh the raw materials according to the above proportioning ratio, and the total mass of the monomers is 100g. After mixing the above raw materials evenly, add them into the reaction bottle at one time. N2 protection, stirring, and constant temperature reaction at 150°C for 1 hour to obtain a crude product, then collect white particles, perform suction filtration, wash with hot distilled water 4 times, and vacuum dry at 60°C for 14 hours to obtain epoxy compounds of the present invention. Oligomer chain extender products.

[0035] When the epoxy oligomer chain extender of the present invention is used for reaction extrusion chain extension of recycled nylon, the molecular weight and intrinsic viscosity of recycled ...

Embodiment 3

[0037] formula

[0038]

[0039] synthetic route

[0040] In a 1000ml three-necked round-bottom flask, add 500ml of distilled water, and at the same time add 0.5g of emulsifier with a total monomer mass, and heat to a constant temperature of 130°C. Then weigh the raw materials according to the above proportioning ratio, and the total mass of the monomers is 100g. After mixing the above raw materials evenly, add them into the reaction bottle at one time. N2 protection, stirring, and constant temperature reaction at 130°C for 1.5 hours to obtain a crude product, then collect white particles, perform suction filtration, wash with hot distilled water for 3 times, and vacuum dry at 60°C for 18 hours to obtain epoxy compounds of the present invention. Oligomer chain extender products.

[0041]The epoxy oligomer chain extender of the present invention is used in PET / PA alloys. After adding the chain extender, the compatibility of the alloy is improved, and the impact strength a...

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Abstract

The invention provides an epoxy oligomer chain extender and a preparation method thereof. The epoxy oligomer chain extender can significantly improve the intrinsic viscosity and molecular weight of polyester and nylon type polymer materials and reduce the content of terminal carboxyl groups. The chain extender is prepared from the following components in parts by weight: 50-80 parts of a styrene monomer, 15-25 parts of an acrylic acid glyceride monomer, 5-25 parts of an acrylic acid monomer, 0.1-0.5 part of an initiating agent and 0.1-1.0 part of a chain transfer agent. The preparation method of the chain extender comprises the steps of selecting the reactive monomers and auxiliary agents, adding the monomers and auxiliary agents into a reaction kettle in sequence, and performing polymerization reaction at a certain stirring speed at 120-150 DEG C; drying the reactant to obtain a finished product which is a multi-monomer copolymerized oligomer with low molecular weight. Compared with the existing conventional micro-molecular chain extender, the epoxy oligomer chain extender provided by the invention has the characteristics of simple preparation, wide application range, safety, reliability, high chain extension efficiency, good water resistance, no generation of gel and the like.

Description

technical field [0001] The invention relates to a chain extender and a preparation method thereof, in particular to an epoxy oligomer chain extender and a preparation method thereof. The chain extender can be used for recycling polyester and nylon polymer materials. Background technique [0002] With the advancement of science and technology and the development of the times, polymer materials have been more and more widely used in various fields of production and life. In my country, at present all polyethylene terephthalate (PET) bottles are made of virgin PET raw materials extracted from petroleum, and the annual production of up to 3 million tons of PET bottles consumes more than 18 million tons of Oil, at the same time, has also caused enormous environmental pressure. At present, the recycling of PET and the high-value-added chain extension and viscosity-increasing industry are in the ascendant in various countries around the world, becoming a new force in the plastic re...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F220/06C08F220/32C08F220/16C08F2/38C08L67/02C08L77/06C08L25/14
Inventor 刘宝玉唐舫成杜壮伍金奎汪加胜
Owner GUANGZHOU LUSHAN NEW MATERIALS
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