Aliphatic polyester complexes and method of preparing the same

A technology of aliphatic polyester and aliphatic copolyester, which is applied in the field of degradable polymer materials, can solve the problems of local overheating and side reaction control, product quality stability control, and interface renewal difficulties, etc., to achieve performance Flexible and convenient adjustment, low cost, good color effect

Active Publication Date: 2009-02-18
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the later stage of the melt polycondensation reaction, the viscosity of the system is very high, the interface renewal is difficult, the reaction time is long, the local overheating and side reaction control are difficult, and the product quality (color yellowing and small molecule content) and stability control are difficult.

Method used

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  • Aliphatic polyester complexes and method of preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of aliphatic copolyester

[0033] Add 20,600g of succinic acid, 25,000g of butanediol, and 7,100g of adipic acid in a reaction kettle with a volume of 100L, and heat up while stirring until the esterification effluent is complete, then add the catalyst Ti(OBu) 4 30g, vacuumize, continue to heat up to 230°C, maintain a vacuum of 20Pa at a constant temperature of 230°C for 2 hours, add nitrogen to supplement pressure, discharge and pelletize to obtain copolyester 1. Test molecular weight and molecular weight distribution, terminal carboxyl group, melt index.

[0034] (2) Preparation of Aliphatic Copolyester Compounds

[0035] Copolyester 1 and polylactic acid (trade name NatureWorks 3001D) obtained above were vacuum-dried at 60° C. for 12 hours for later use. Dried copolyester 1, polylactic acid and 1,4-bis-(2-oxazoline base) benzene are extruded in a double exhaust reaction twin-screw extruder with a length-to-length ratio of 42 in a ratio of 70 / 30 / 0.1...

Embodiment 2

[0037] (1) Preparation of aliphatic copolyester

[0038] Add 18,500g of succinic acid, 25,000g of butanediol, and 8,800g of adipic acid in a reaction kettle with a volume of 100L, and heat up while stirring until the esterification effluent is complete, then add the catalyst Ti(OBu) 4 30g, vacuumize, continue to heat up to 230°C, maintain a vacuum of 20Pa at a constant temperature of 230°C for 2 hours, add nitrogen to supplement pressure, discharge and pelletize to obtain copolyester 2. Test molecular weight and molecular weight distribution, terminal carboxyl group, melt index.

[0039] (2) Preparation of Aliphatic Copolyester Compounds

[0040] Copolyester 2 and polylactic acid (trade name NatureWorks 3001D) obtained above were vacuum-dried at 60° C. for 12 hours for later use. The copolyester 2 after drying, polylactic acid and 2,2'-bis-(2-oxazoline) are extruded by twin-screw extruders with double venting reactions with a length-to-length ratio of 42 in the ratio of 70 / ...

Embodiment 3

[0042] (1) Preparation of aliphatic copolyester

[0043] After nitrogen replacement in a reaction kettle with a volume of 100L, 25100g of dimethyl succinate, 25000g of butanediol, and 8400g of dimethyl adipate were added, and the temperature was raised while stirring until the alcohol was completely transesterified, and the catalyst Ti(OBu ) 4 30g, vacuumize, continue to heat up to 230°C, maintain a vacuum of 20Pa at 230°C for 2 hours, add nitrogen to supplement pressure, discharge and pelletize to obtain copolyester 3. Test molecular weight and molecular weight distribution, terminal carboxyl group, melt index.

[0044] (2) Preparation of Aliphatic Copolyester Compounds

[0045] Copolyester 3 and polylactic acid (trade name NatureWorks 3001D) obtained above were vacuum-dried at 60° C. for 12 hours for later use. Copolyester 3 after drying, polylactic acid and 1,4-bis-(2-oxazoline base) benzene are extruded in a double exhaust reaction twin-screw extruder with a length-to-...

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Abstract

The invention discloses a fatty polyester compound and a preparation method thereof, including the following steps: (1) synthesis of condensation fatty co-polyester: the react between two, three or four fatty dicarboxylic acids or the esters thereof and fatty dibastic alcohol is conducted to achieve condensation fatty co-polyester; (2) the condensation fatty co-polyester reacts with poly lactic acid under the existence of double functional-group chain-extension agent and the extruded out, the achieved fatty polyester compound is the blend of high molecular weight fatty co-polymer, high molecular weight fatty block copolymer and high molecular weight poly lactic acid. The weight percents of condensation fatty co-polyester and poly lactic acid drop is 5:95-95:5. The preparation method has the advantages that the condensation duration is short, the process control is stable and simple, and the method can be directly applied to various processing techniques such as film inflation, extrusion, vacuum molding, blow molding, foaming, and the like; the achieved products have high purity and nice color; the performance adjustment is flexible and convenient, and the cost is low.

Description

technical field [0001] The invention relates to the field of degradable polymer materials, in particular to a degradable aliphatic polyester compound and a preparation method thereof. Background technique [0002] General-purpose plastics polyethylene and polypropylene are widely used in agricultural films and various packaging materials. They have excellent comprehensive physical and chemical properties and processing properties, and are cheap, but they are difficult to degrade and bring great pressure to the environment. Friendly polymer materials are an important means to protect the environment and achieve sustainable development strategies. [0003] Among many biodegradable polymers, polycondensation-type aliphatic polyester-polybutylene succinate (PBS) has good comprehensive physical and chemical properties and biodegradability. This type of material includes the commercialized product Bionolle, patent disclosure No. CN1424339A uses butanediol and succinic acid as raw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08G63/82B29C47/00
Inventor 曹民曾祥斌黄险波徐依斌陈健史振国罗湘安
Owner KINGFA SCI & TECH CO LTD
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