Rapid nucleating agent of polylactic resin

A polylactic acid resin and nucleating agent technology, which is applied in the field of polylactic acid resin additives and polylactic acid resin nucleating agents, can solve the problems of polylactic acid resin poor oxidation resistance and no reduction effect, and achieve crystallization nucleation Sufficient, improved molding processability, high melting heat release enthalpy effect

Active Publication Date: 2011-05-04
ZHEJIANG HISUN BIOMATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent (notification number: CN100384937C) polylactic acid resin composition, it discloses the metal salt of phosphorus compound as polylactic acid resin nucleating agent, although this nucleating agent can improve the crystallization speed of polylactic acid resin, makes its moldability excellent ; But because the metal salt of this phosphorus compound all has pentavalent phosphorus and has no phosphorus-hydrogen bond, it does not have reduction effect, resulting in poor oxidation resistance of polylactic acid resin after crystallization

Method used

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  • Rapid nucleating agent of polylactic resin
  • Rapid nucleating agent of polylactic resin
  • Rapid nucleating agent of polylactic resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Polylactic acid resin S402 (supplied by Hisun Biomaterials Co., Ltd., containing about 4.8% D-configuration poly-L-lactic acid, with a viscosity-average molecular weight of 56,000) and the fast nucleating agent in the following Table 1 were Ratio, after mixing uniformly in the SHR type high-speed mixer, use TE-35 type co-rotating twin-screw extruder at 165 ° C to melt, blend and extrude, draw strands, cool in a water tank, air dry, and granulate. Finally, dry the resin in a vacuum oven at 60°C for four hours.

[0042] Test of crystallization speed: the blended resin is tested by DSC. Under the protection of nitrogen, heat up from 20°C to 190°C at 10°C / min, stay for 4 minutes to eliminate heat history, then rapidly cool down to 0°C at 45°C / min, and finally raise the temperature twice from 0°C at 10°C / min to 190°C. This test records the ΔH of polylactic acid during the second heating m (J / g). The secondary temperature rise process to eliminate the heat loss history is...

Embodiment 2

[0047] Polylactic acid resin S330 (provided by Hisun Biomaterials Co., Ltd., containing about 7.1% poly-L-lactic acid in D configuration, with a viscosity average molecular weight of 46,000) and a nucleating agent in a certain proportion, using the method in Example 1 Be prepared into mixed resin, adopt the DSC method test of embodiment 1, the result is shown in table 2.

[0048] Table 2. Melting endothermic enthalpy of polylactic acid resin S330 with different nucleating agents

[0049]

[0050]

[0051] Talcum powder is the commonly used nucleating agent of reported polylactic acid, as can be seen from Table 2, compared with adding sodium stearate, sodium benzoate and blank sample, the nucleating effect of talcum powder is good, but adding phenyl The exothermic enthalpy of melting of zinc phosphinate and zinc phenylphosphinate resins is significantly higher than that of talcum powder, indicating that zinc phenylphosphinate and zinc phenylphosphinate have better nucleat...

Embodiment 3

[0053] Polylactic acid resin S401 (provided by Hisun Biomaterials Co., Ltd., containing about 5.5% of D-configuration poly-L-lactic acid, with a viscosity-average molecular weight of 46,000) and a nucleating agent in a certain proportion, using the method in Example 1 Prepare mixed resin, adopt the DSC method test of embodiment 1, the result is shown in table 3.

[0054] Table 3 Melting exothermic enthalpy of polylactic acid resin S401 with different nucleating agents

[0055]

[0056]

[0057] In Table 3, the exothermic enthalpy of melting of the resin added with zinc phenylphosphinate is higher than that of the resin added with calcium carbonate, titanium dioxide, zinc stearate, and zinc benzoate, indicating that the nucleation rate of zinc phenylphosphinate is faster.

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Abstract

The invention provides a nucleater for a polylactic resin, which belongs to the technical field of novel materials. The nucleater is phosphorous compound metal salt with reduction function, and the phosphorous compound metal salt is one or a mixture of phosphonous compound metal salt containing trivalent phosphor or phosphorus hydrogen bonds, phosphinous compound metal salt and phosphinic compound metal salt. The nucleater can promote growth of crystals and reduce the dimension of the crystals, and simultaneously has good nucleation effect, quick crystallization speed and strong antioxygenic property, heat resistance and hydrolytic resistance.

Description

technical field [0001] The invention relates to an additive for polylactic acid resin, in particular to a nucleating agent for polylactic acid resin, belonging to the technical field of new materials. Background technique [0002] Polylactic acid resin (PLA) is an excellent biocompatible polymer derived from renewable resource crops (such as corn, sugar beet, sucrose, cassava, plant straw, etc.). The most prominent advantage of polylactic acid is its degradability. After use, it can be completely degraded by organisms in nature, and finally generate carbon dioxide and water. Polylactic acid is non-toxic, degradable, and renewable, which meets the requirements of environmental protection and sustainable development and the establishment of a harmonious society, and has attracted extensive attention from new material researchers and business people. [0003] Although polylactic acid has good mechanical properties, thermoplasticity, fiber formation, and transparency, it is sui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/5393C08K5/5377C08K5/5313C08L67/04
Inventor 边新超高战团冯立栋陈志明白骅陈学思陈文启
Owner ZHEJIANG HISUN BIOMATERIALS
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