Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of heat-resistant bio-based block copolyester

A block copolyester and bio-based technology, which is applied in the field of polyester preparation, can solve the problems of low heat resistance and poor polyester degradation of degradable polyester, and achieve good hue, high degradability and heat resistance , The process method is simple and easy to implement

Active Publication Date: 2022-05-03
ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the fact that in the synthesis of degradable polyesters, heat resistance and degradability are often unavailable at the same time, the degradability of polyesters with good heat resistance is often poor, and the heat resistance of degradable polyesters is often not high, etc. problem, a heat-resistant bio-based copolyester and its preparation method are proposed

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of heat-resistant bio-based block copolyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: A kind of preparation method of heat-resistant bio-based block copolyester comprises the following preparation steps:

[0029] 1) Mix 100g of 2,5-furandicarboxylic acid, 64g of ethylene glycol, 0.1g of catalyst, and 0.1g of stabilizer, and carry out esterification reaction at 195°C to prepare esterified product A;

[0030] 2) Mix 100g of 2,3-dibromo-1,4-butanediol, 109g of phenylboronic acid, 27mg of tetrakistriphenylphosphine palladium, 10g of 1mol / L sodium carbonate solution, and 50ml of toluene at 90°C under a nitrogen atmosphere Insulated reaction for 2 hours, diol A was obtained after precipitation by a poor solvent n-hexane;

[0031] 3) Put 100g of diol A, 40g of 1,4-succinic acid, 0.1g of n-butyl titanate and 0.1g of thermal stabilizer 1010 in a reaction kettle, and carry out esterification reaction at 220°C to prepare an esterified product B;

[0032] 4) Insulate the esterified product B at 245°C and 200pa for 0.5h for precondensation reaction to...

Embodiment 2

[0034] Embodiment 2: A kind of preparation method of heat-resistant bio-based block copolyester comprises the following preparation steps:

[0035] 1) Mix 100g of 2,5-furandicarboxylic acid, 64g of ethylene glycol, 0.1g of catalyst, and 0.1g of stabilizer, and carry out esterification reaction at 195°C to prepare esterified product A;

[0036] 2) Mix 100g of 2,3-diiodo-1,4-butanediol, 82g of phenylboronic acid, 10mg of palladium acetate, 10g of 1mol / L potassium carbonate solution, and 50ml of chloroform, and keep the reaction at 70°C under a nitrogen atmosphere 4h, after being precipitated by a poor solvent n-heptane, diol A was obtained;

[0037] 3) Put 100g of diol A, 52g of 2,5-furan dibasic acid, 0.1g of stannous octoate and 0.1g of heat stabilizer 1076 in a reaction kettle, and carry out esterification reaction at 200°C to prepare esterified product B ;

[0038] 4) Insulate the esterified product B at 235° C. and 200 Pa for 1 hour for precondensation reaction to prepare...

Embodiment 3

[0040] Embodiment 3: A kind of preparation method of heat-resistant bio-based block copolyester comprises the following preparation steps:

[0041] 1) Mix 100g of 2,5-furandicarboxylic acid, 64g of ethylene glycol, 0.1g of catalyst, and 0.1g of stabilizer, and carry out esterification reaction at 195°C to prepare esterified product A;

[0042] 2) Add 100g of 2-iodo-3-methoxybutane-1,4-diol, 148g of phenyl borate, 20mg of [1,1'-bis(diphenylphosphino)ferrocene]dichloro Palladium chloride, 10 g of 1 mol / L cesium carbonate solution, and 50 ml of acetonitrile were mixed, kept at 80 ° C and reacted for 3 hours under a nitrogen atmosphere, and diol A was obtained after ethanol precipitation in a poor solvent;

[0043] 2) Put 100g of dihydric alcohol A, 50g of 1,6-adipic acid, 0.1g of potassium acetate and 0.1g of heat stabilizer 425 in a reaction kettle, and carry out esterification reaction at 210°C to prepare esterified product B;

[0044] 3) Insulate the esterified product B at 2...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of heat-resistant bio-based block copolyester, relates to the technical field of polyester preparation, and comprises the following steps: 1) preparing 2,5-furandicarboxylic acid, glycol, catalyst and heat stabilizer Mixing for esterification reaction to obtain esterified product A; 2) Mixing and reacting diol halides, phenylboronic acid and / or its esters, metal catalysts, salt solutions, and solvents, and obtaining diol A after precipitation in a poor solvent ; 3) Esterification of diol A, bio-based dibasic acid, catalyst and thermal stabilizer to obtain esterified product B; 4) Pre-condensation reaction of esterified product B to obtain a prepolymer; 5) The prepolymer esterified product A is mixed and polycondensed to obtain a heat-resistant bio-based block copolyester. The bio-based block copolyester prepared by the invention has high degradability and heat resistance, good hue, controllable structure, simple and easy process method, which is beneficial to industrial production, and can be widely used in packaging, fiber, etc. field application.

Description

technical field [0001] The invention relates to the technical field of polyester preparation, in particular to a preparation method of heat-resistant bio-based block copolyester. Background technique [0002] PET (polyethylene terephthalate) is a polyester with industrial value, because it has unique mechanical properties and low production cost, so PET is widely used in fiber, film, bottle flakes and other fields. However, due to the low glass transition temperature of PET, the high crystallinity of PET will cause the product to become white and opaque during injection molding. Therefore, in order to avoid this defect, it is necessary to use a modifier to reduce the crystallization of the copolyester and improve its heat resistance. Moreover, in recent years, in order to protect the environment, there have been more and more researches on the preparation of bio-based degradable materials. However, in the synthesis of copolyesters in the prior art, heat resistance and degra...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/698C08G63/78
CPCC08G63/6988C08G63/78
Inventor 胡宇苗徐锦龙王松林张婉迎
Owner ZHEJIANG HENGYI PETROCHEMICAL RES INST CO LTD