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Ultrahigh-melt-index polylactic acid resin, and preparation method and applications thereof

A technology of polylactic acid resin and melt index, which is applied in the field of polylactic acid resin and its preparation, can solve the problems of low melt index, long production cycle, and cumbersome process, and achieve the effects of short production cycle, guaranteed processing performance, and simple preparation and operation

Inactive Publication Date: 2019-11-01
QINGDAO RICH PLASTIC NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that the melt index of polylactic acid resin is generally low and the production is difficult, poor stability, long production cycle and complicated process, the present invention proposes a polylactic acid resin with a melt index of more than 500g / 10min and stable fluidity and a preparation method thereof and application

Method used

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  • Ultrahigh-melt-index polylactic acid resin, and preparation method and applications thereof
  • Ultrahigh-melt-index polylactic acid resin, and preparation method and applications thereof

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preparation example Construction

[0034] The embodiment of the present invention also provides a preparation method of ultra-high melt index polylactic acid resin, comprising the following steps:

[0035] (1) Catalyst, initiator, antioxidant are dissolved or dispersed in organic solvent, after mixing uniformly, obtain solution M, wherein catalyst concentration is 0.06-6.02g / mL, initiator concentration is 0-3.01g / mL, Antioxidant concentration is 0.6-6.02g / mL;

[0036] (2) Add solution M to polylactic acid, add 1.67mL solution M per kilogram of polylactic acid, after mixing evenly, carry out reactive extrusion on a twin-screw extruder, and the product is water-cooled and granulated to obtain ultra-high melt index polylactic acid resin.

[0037] In the above-mentioned examples, the catalyst, initiator, and antioxidant are configured in the form of a solution, and then mixed with polylactic acid resin, so that low-level additives can be uniformly dispersed in the solution and mixed with polylactic acid. The selec...

Embodiment 1

[0044] Disperse and dissolve 5 g of the catalyst stannous octoate, 5 g of the initiator dicumyl peroxide, 10 g of hindered phenolic antioxidant 1010, and 10 g of phosphite antioxidant 168 into 16.7 mL of dichloromethane to prepare a solution.

[0045] Use 10kg of polylactic acid resin with the brand name 6252D produced by NatureWorks as the matrix, add the above solution to it, mix evenly, and carry out reactive extrusion on a twin-screw extruder with φ35mm×2 and L / D=44 at 160-190°C Go out granulation, screw speed 300rpm. The extrudate is cooled and pelletized to obtain the final product.

Embodiment 2

[0047] Disperse and dissolve 20 g of catalyst tetrabutyl titanate, 3 g of initiator di-tert-butyl peroxide, 10 g of antioxidant 1010, and 15 g of antioxidant 168 into 16.7 mL of chloroform to prepare a solution.

[0048] Use 10kg of polylactic acid resin with the brand name 6252D produced by NatureWorks as the matrix, add the above solution to it, mix evenly, and carry out reactive extrusion on a twin-screw extruder with φ35mm×2 and L / D=44 at 180-200°C. Go out granulation, screw speed 200rpm. The extrudate is cooled and pelletized to obtain the final product.

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Abstract

The invention provides an ultrahigh-melt-index polylactic acid resin, and a preparation method thereof, and belongs to the field of high molecular material. The preparation method is capable of solving problems in the prior art that polylactic acid resin melt index is low, production is difficult, stability is low, production period is long, and technology is complex. The ultrahigh-melt-index polylactic acid resin comprises, by weight, 100 parts of polylactic acid, 0.01 to 1 part of a catalyst, 0 to 0.5 part of an initiator, and 0.1 to 1 part of an anti-oxidant. The ultrahigh-melt-index polylactic acid resin prepared through reaction extrusion can be widely used in the field of disposable non-woven fabric, the material processing performance of obtained products is ensured, plastic pollution is reduced at the same time, and green environment protection requirements are satisfied.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a polylactic acid resin with an ultra-high melt index, a preparation method and application thereof. Background technique [0002] Polylactic acid resin is a polymer material processed from lactic acid monomer formed by microbial fermentation of biomass raw materials. With the development of non-woven fabrics, it also puts forward higher requirements for the processing performance of polylactic acid resin. Meltblown technology, high-speed spinning, and fine denier fibers all require polylactic acid resin to have good melt flow properties; some are not resistant to high temperatures. High-grade pigments and additives need polylactic acid with low processing temperature as a carrier. All of these require polylactic acid materials to have an ultra-high melt index at lower temperatures to meet processing needs. [0003] At present, polylactic acid resin mainly realizes ...

Claims

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Application Information

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IPC IPC(8): C08L67/04
CPCC08L67/04
Inventor 梁俊雅陈军田洪池蒿文朋牛茂平
Owner QINGDAO RICH PLASTIC NEW MATERIAL
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