Polymerization method of biodegradable high-barrier thermoplastic polymer

A technology of thermoplastic polymers and polymerization methods, applied in the field of polymers, can solve the problems of poor tensile strength of products, failure to maintain barrier properties, and no improvement in low-temperature brittleness, and achieve wide application fields, good biodegradability, and avoid pollution. Effect

Inactive Publication Date: 2014-11-05
JIANGSU ZHONGKE JINLONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention does not characterize and select the structure of polypropylene carbonate, so it cannot maintain the barrier properties of the material to water vapor and oxygen and meet the requirements for biodegradation, and the resulting product has poor tensile strength and low temperature brittleness.

Method used

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  • Polymerization method of biodegradable high-barrier thermoplastic polymer
  • Polymerization method of biodegradable high-barrier thermoplastic polymer
  • Polymerization method of biodegradable high-barrier thermoplastic polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Get polypropylene carbonate ester structure and account for mol percent 55%, polyoxypropylene ether structure accounts for 45% composite polyol 250kg in mol percent, molecular weight is 2500, pours in the reactor, adds 1,4 butanediol 18g, Heat up and stir to 90°C, and vacuumize for 1-3 hours. The vacuum degree is 100pa. After the vacuum is stopped, add an environmentally friendly reaction catalyst, stir evenly, melt 80kg of 4,4'diphenylmethane diisocyanate (MDI), and then put The mixed polyol and diphenylmethane diisocyanate are stirred at a high speed in proportion, injected into a twin-screw extruder, reacted and extruded, and 0.05% dicumyl peroxide is automatically added to the middle section of the twin-screw with an electronic metering scale to obtain Transparent polymer 01, test melt flow rate MFR =2.3g / 10min

Embodiment 2

[0045] Take 200 g of composite polyols with a polycarbonate propylene structure accounting for 70 mole percent and a polyoxypropylene ether structure accounting for 30 mole percent, with a molecular weight of 2000 and a hydroxyl value of 55 mg (KOH) / g, and add 18.6 g of ethylene glycol, Raise the temperature and stir to 90°C, and vacuumize for 1-3 hours. The vacuum degree is 100pa. After stopping the vacuum, add an environment-friendly reaction catalyst, stir evenly, melt 110g of 4,4'diphenylmethane diisocyanate at 70°C, and then The mixed polyol and diphenylmethane diisocyanate are stirred at a high speed in proportion, injected into a twin-screw extruder, reacted and extruded, and 0.05% dicumyl peroxide is automatically added to the middle section of the twin-screw with an electronic metering scale to obtain Transparent polymer 02, test melt flow rate MFR =1.5g / 10min

Embodiment 3

[0047] Take 250 kg of composite polyols with a polypropylene carbonate structure accounting for 55% by mole percent and a polyoxypropylene ether structure accounting for 45% by mole percent, with a molecular weight of 2500, add 12 kg of ethylenediamine, heat up and stir to 90 ° C, and pump Vacuum for 1-3 hours, with a vacuum degree of 90pa. After the vacuum is stopped, add an environmentally friendly reaction catalyst and stir evenly; melt 80kg of 4,4′ diphenylmethane diisocyanate at 70°C, and then mix the polyol and 4,4′ Diphenylmethane diisocyanate, stirred at a high speed according to the proportion, injected into the twin-screw extruder for reaction extrusion, and automatically added 0.065% of di-(tert-butylperoxyisopropyl) benzene in the middle section of the twin-screw extruder to obtain Translucent polymer 03, test melt flow rate MFR=2.0g / 10min

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Abstract

The invention provides a polymerization method of a biodegradable high-barrier thermoplastic polymer. Polymer monomers comprising (a) composite polyatomic alcohol of polycarbonate segment and polyether segment; (b) one or more small-molecular compounds with two or more hydroxyl groups and amino groups; (c) one or more diisocyanate compounds; and (d) one or more cross-linking agents. A preparation method comprises the steps that (a), (b) and (c) are subjected to mixed reaction; and the monomer (d) is added into the product of the mixed reaction, such that grafting cross-linking is carried out. According to the invention, polymerization monomers are finely selected, and reaction route and conditions are reasonably designed, such that the polymer has good barrier property against water vapour and oxygen, and that the polymer has good physical and mechanical performances. The polymer also has good biodegradability and wider application scope.

Description

technical field [0001] The invention relates to a polymer, in particular to a high-molecular-weight, biodegradable, biodegradable high-barrier thermoplastic polymer polymerization method with relatively high water vapor and oxygen barrier. Background technique [0002] Artificially prepared biodegradable materials are a new type of polymer material developed to deal with the "white pollution" caused by general-purpose polymer materials. This type of material can use existing polymer processing technologies to produce daily necessities, mainly for one-time use. Non-toxic packaging, such as film bags, cups, tableware, mulch and other products. Biodegradable materials bring great convenience to people's daily life and reduce white pollution. Due to the limitation of material performance and processing technology, the current application field of biodegradable materials is limited to disposable packaging with short life cycle. In recent years, research institutions and enterpr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/73C08G18/66C08G18/48C08G18/32C08J3/24
CPCC08G18/44C08G64/34C08L69/00C08G18/7671C08G18/48C08G18/4833C08G18/6674C08G18/6685C08G18/73C08G2230/00C08J3/24C08J2375/08
Inventor 徐玉华宗敬东王兆生徐宝庚林建新徐玉俊
Owner JIANGSU ZHONGKE JINLONG CHEM
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