Method for preparing polyvinyl chloride (PVC) plasticizer through ester exchange reaction of waste polyethylene terephthalate (PET) and monohydric alcohol

A monohydric alcohol and transesterification technology, applied in the field of polymer chemistry, can solve the problems of difficult natural degradation, environmental pollution, large amount of waste, etc.

Inactive Publication Date: 2011-11-09
FOSHAN YINMING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Polyethylene terephthalate is a polymer material that is widely used and consumes a lot. Drinking water bottles, coke bottles, polyester fibers, etc. that are widely used in the market are all made of polyethylene terephthalate. Made of ester, it is a disposable product, with a huge amount of waste, and it is difficult to degrade naturally, causing serious environmental pollution

Method used

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  • Method for preparing polyvinyl chloride (PVC) plasticizer through ester exchange reaction of waste polyethylene terephthalate (PET) and monohydric alcohol
  • Method for preparing polyvinyl chloride (PVC) plasticizer through ester exchange reaction of waste polyethylene terephthalate (PET) and monohydric alcohol

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Embodiment Construction

[0019] Implementation 1: Wash the polyethylene terephthalate, spin it dry, then wash it with distilled water, spin it dry, and dry it at 100°C for later use.

[0020] Implementation 2: Take 384 parts of polyethylene terephthalate, 260 parts of octanol and 1 part of zinc compound obtained in Implementation 1, stir under the protection of nitrogen, heat at 180-200°C for 4-9 hours, and polypylene Ethylene glycol diformate dissolves and the reaction is complete. A short-chain polyester compound is obtained, which is off-white soft wax at room temperature. Under the protection of nitrogen, it is a colorless transparent clear liquid.

[0021] Implementation 3: Take 100 parts of polyvinyl chloride resin powder, 60 parts of the product of Implementation 2 and 1.5 parts of stabilizer, stir at 80-100°C to form a loose powder, and press at 180°C to obtain colorless, odorless, soft, Highly transparent polyvinyl chloride product.

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Abstract

The invention discloses a method for preparing a polyvinyl chloride (PVC) plasticizer through the ester exchange reaction of waste polyethylene terephthalate (PET) and monohydric alcohol, and belongs to the field of macromolecules. The method comprises the following steps of: preparing a short-chain polyester compound at the temperature of between 180 and 200 DEG C in the presence of a zinc compound or a titanium compound, wherein the molecular weight of the compound can be controlled according to a molar ratio of the PET to the monohydric alcohol; and adding PVC resin powder into the short-chain polyester compound in the presence of an appropriate stabilizer to prepare a colorless, odorless, soft and highly transparent PVC product. The PVC product meets the related national standard and the restriction of hazardous substances (RoHS) environment-friendly standard, and has the characteristics of low cost, high profit rate and waste recycling.

Description

Technical field: [0001] The invention relates to a method for chemically modifying waste polyethylene terephthalate (PET) into a novel polyvinyl chloride (PVC) plasticizer, which belongs to the field of polymer chemistry. technical background: [0002] Polyethylene terephthalate is a polymer material that is widely used and consumes a lot. Drinking water bottles, coke bottles, polyester fibers, etc. that are widely used in the market are all made of polyethylene terephthalate. It is made of ester, which is a disposable product, and the amount of waste is huge, and it is difficult to degrade naturally, causing serious environmental pollution. At present, it is generally used for recycling in the market, and most of the methods are directly regenerated into resistance products. For example: spinning into low-grade fibers can only be used as cotton wool, curtain cloth, etc., which belongs to a kind of devalued recycling. The patent (00803627.6) of U.S. Eastman Chemical Compan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/03C07C69/82C07C69/83C08L27/06C08K5/12
Inventor 叶大铿
Owner FOSHAN YINMING TECH
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