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Full-biodegradable plastic alloy and preparation method thereof

A technology of degrading plastics and biodegradation, applied in the field of plastic alloys, can solve the problems of poor fluidity of high-molecular-weight polymer raw materials, difficult dispersion of composite material components, and difficulty in ensuring alloy compatibility, etc., to achieve strong force and dispersion Uniform, cost-reducing effect

Pending Publication Date: 2021-07-23
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the preparation methods of fully biodegradable plastic alloys in the prior art often have some defects. One defect is that the high molecular weight polymer raw materials have poor fluidity even under high temperature conditions, which makes it difficult for the components in the composite material to disperse, and Inhomogeneous; Another more serious defect is that it is difficult to ensure good compatibility between the components in the alloy

Method used

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  • Full-biodegradable plastic alloy and preparation method thereof
  • Full-biodegradable plastic alloy and preparation method thereof
  • Full-biodegradable plastic alloy and preparation method thereof

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Embodiment

[0038] This embodiment relates to a fully biodegradable plastic alloy and its preparation.

Embodiment 1

[0039] Implementation 1 Preparation of PLA fully biodegradable alloy

[0040]Add 16.0Kg (80wt%) lactide in a 30L reactor with heating and stirring functions, raise the temperature to 95°C, and connect the vacuum system to maintain a vacuum of 50mbar at the same time, so that the lactide is completely dissolved, and add 120g stearin Zinc acid (0.6wt%) is used as a catalyst, and 120g of maleic anhydride (0.6wt%) is used as a reaction activator. Raise reactor temperature gradually to 110 ℃, add 120g antioxidant 1010 and 120g trialkyl phosphite (0.6wt%) as stabilizer, mix homogeneously, add 1.6Kg magnesium hydroxide (3.2wt%) by side feeding port %) as a flame retardant and the talcum powder filler of 1.6Kg (8.0wt%) processed through the KH560 surface coupling agent of 160g (0.8wt%), further promote the reactor temperature to 130 ℃, mix well, adopt reaction The extruder carries out the polymerization reaction. The length-to-diameter ratio of the extruder is 40. The temperature of ...

Embodiment 2

[0041] Embodiment 2 prepares PLA / PBSA full biodegradable plastic alloy

[0042] In the 30L reactor with heating and stirring reactor, add the lactide of 17Kg (85wt%) and 200g (1wt%) catalyst stannous chloride, setting temperature is 95 ℃, keeps stirring, connects vacuum system simultaneously, Keep a vacuum of 50mbar to dissolve the lactide completely, add 2Kg (10wt%) PBSA, 200g (1wt%) activator dicyclohexylcarbodiimide and 200g (1wt%) heat stabilizer three from the side feed port Alkyl phosphite, keep stirring until the mixture is uniform, raise the temperature to 110°C, dehydrate for 30min, then add the resulting mixture solution into a reactive twin-screw extruder for polymerization, the length-diameter ratio of the extruder is 40. The temperature of heating zones 1 to 6 is set to 100°C, 180°C, 190°C, 180°C, 170°C, 170°C, the melt temperature is 170°C, the head temperature is 160°C, the host speed is 20Hz, and the feeding The speed is 15Hz. Cool and granulate to obtain PLA...

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Abstract

The invention discloses a full-biodegradable plastic alloy and a preparation method thereof, the plastic alloy comprises the following raw material components: a biodegradable monomer, a catalyst, a reaction activator, a heat stabilizer, a flame retardant, a filler, an antistatic agent, a surface coupling agent and the like, all the raw material components are dissolved or mixed in a cyclic ester biodegradable monomer, and polymerizing and molding are carried out to obtain the full-biodegradable plastic alloy. According to the plastic alloy disclosed by the invention, not only is the biodegradability ensured, but also good compatibility and flowability among the components in the preparation process are ensured on the basis that no solvent is not used, so that the components of the obtained plastic alloy material are uniformly dispersed, excellent performance is obtained, the preparation process route is shortened, the cost is reduced, and industrial application is easy.

Description

technical field [0001] The invention relates to the technical field of plastic alloys, in particular to a fully biodegradable plastic alloy and a preparation method of the plastic alloy. Background technique [0002] Plastic alloys are a new class of high-performance, functional and specialized materials obtained by physical blending or chemical grafting. It can improve or enhance the performance of existing plastics and reduce costs. It has become the most advanced material in the plastics industry. One of the active breeds. my country's research on plastic alloys began in the 1960s and has developed rapidly in recent years. It is widely used in automobiles, electronics, precision instruments, office equipment, packaging materials, building materials and other fields. Compared with developed countries, my country's plastic There is still a lot of room for expansion in the alloy application market. [0003] Petroleum-based plastic alloy raw materials, because of their non-d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08K9/06C08K3/34C08K3/22
CPCC08K9/06C08K3/34C08K3/22C08L67/04C08K2003/2224C08L2201/06
Inventor 侯连龙
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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