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Method for synthetizing aqueous polyurethane emulsion from package waste PET bottles

A water-based polyurethane and emulsion technology, applied in the direction of plastic recycling and recycling technology, can solve problems such as environmental pollution, and achieve the effect of environmental friendliness and simple process

Active Publication Date: 2014-06-18
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for packaging waste PET bottles to synthesize water-based polyurethane emulsion, which solves the environmental pollution problem caused by waste packaging polymer PET bottles, reuses waste PET bottles, and synthesizes environmentally friendly products with increasingly broadened application ranges. Type waterborne polyurethane

Method used

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  • Method for synthetizing aqueous polyurethane emulsion from package waste PET bottles
  • Method for synthetizing aqueous polyurethane emulsion from package waste PET bottles
  • Method for synthetizing aqueous polyurethane emulsion from package waste PET bottles

Examples

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Embodiment 1

[0045] Step 1, the preparation of waste PET alcoholyzate

[0046] a. Cut the recovered waste PET bottles into 5mm×5mm slices, place them in a beaker, pour distilled water into the beaker and stir with a glass rod, put the beaker into an ultrasonic cleaner for 20 minutes, and then clean the beaker Pour out the discarded PET flakes, filter them with an 80-mesh mesh sieve, and remove the water; repeat the above process three times, and finally put the waste PET flakes in an 80-mesh mesh sieve to dry, air-dry naturally in the air for 3 hours, and then put them in the Dry in a vacuum oven with a vacuum degree of 0.05MPa and a temperature of 60°C for 5 hours;

[0047] b. Take 35 parts of discarded PET bottles, 28 parts of neopentyl glycol, 38 parts of dipropylene glycol, and 3 parts of n-butyl titanate in parts by weight;

[0048] c. Put waste PET flakes together with neopentyl glycol and dipropylene glycol into a three-necked flask connected with a stirring device, stir in an oil ...

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Abstract

The invention relates to a method for synthetizing aqueous polyurethane emulsion from package waste PET bottles. The aqueous polyurethane emulsion comprises the following raw components in parts by weight: 17 parts of isophorone diisocyanate, 32 parts of polypropylene glycol, 3.5 parts of dimethylolpropionic acid, 2.5 parts of waste PET alcoholysate, 5 parts of triethylamine, 7 parts of N-methyl pyrrolidone, 8 parts of acetone, 70 parts of deionized water and 0.5 part of dibutyltin dilaurate. The method disclosed by the invention has the advantages that the waste PET bottles are subjected to alcoholysis to generate waste PET alcoholysate with hydroxyl reaction activity, and the waste PET alcoholysate serves as a small molecule chain extender in the aqueous polyurethane emulsion synthetizing to participate in the chain extension reaction of aqueous polyurethane prepolymer, so that the waste PET alcoholysate is successfully grafted on the aqueous polyurethane molecular chain and the aqueous polyurethane emulsion with excellent performances is synthetized; the increasingly serious environmental pollution problem brought by the waste package polymer PET bottles is solved.

Description

technical field [0001] The invention belongs to the technical field of packaging waste recycling and polymer resin synthesis, and in particular relates to a method for synthesizing water-based polyurethane emulsion from packaging waste PET bottles. Background technique [0002] Polyurethane is the abbreviation of polyurethane (polyurethane), generally defined as a polymer compound containing repeated urethane bond structural units [-NH-CO-O-] on the main chain of the polymer chain, called polyurethane . Polyurethane is usually polymerized by stepwise polymerization of dibasic or polyisocyanate and compounds containing two or more active hydrogens. Since Professor Bayer and his colleagues in Germany successfully synthesized polyurethane materials in 1937, they have been widely used in construction, automobiles, light industry, textiles, petrochemicals, metallurgy, electronics, national defense, medical, machinery and many other fields due to their excellent performance. It ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/66C08G18/48C08G18/32C08G18/12C08J11/24C08L67/02
CPCC08G18/0823C08G18/12C08G18/48C08G18/6692C08G18/755C08J11/24C08J2375/08C08G18/3206Y02W30/62
Inventor 方长青周星程有亮于瑞恩
Owner XIAN UNIV OF TECH
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