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Ultraviolet screening agent, preparation method thereof, polylactic acid film containing ultraviolet screening agent and preparation method of polylactic acid film

A technology of shielding agent and ultraviolet rays, applied in the direction of flat products, other household appliances, fibrous fillers, etc., can solve the problems of not involving film products, not involving

Active Publication Date: 2015-08-19
BEIJING INST OF CLOTHING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the prior art, there is also a method of using titanium dioxide and silicon dioxide composite powder as an ultraviolet shielding agent, such as Chinese patent CN 102304313 A, which discloses a coating and a preparation method thereof, which adds titanium dioxide and silicon dioxide to the coating Composite powder, which has a certain shielding effect on ultraviolet rays, but does not involve the shielding effect on ultraviolet rays in film products, especially PLA film products, let alone the transmission of visible light in film products, especially PLA film products Effect

Method used

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  • Ultraviolet screening agent, preparation method thereof, polylactic acid film containing ultraviolet screening agent and preparation method of polylactic acid film
  • Ultraviolet screening agent, preparation method thereof, polylactic acid film containing ultraviolet screening agent and preparation method of polylactic acid film
  • Ultraviolet screening agent, preparation method thereof, polylactic acid film containing ultraviolet screening agent and preparation method of polylactic acid film

Examples

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Effect test

Embodiment 1

[0141] (1) Weigh 2g of nano-titanium dioxide and add it to 200mL of isopropanol, stir and ultrasonically oscillate for 60 minutes, adjust the system to PH=10 with ammonia water, add 6mL of tetraethyl orthosilicate, and stir at 30°C for 30 hours. , filtered, washed three times with deionized water, and dried at 60°C to obtain an ultraviolet shielding agent;

[0142] (2) Dry the polylactic acid resin at 80°C for 12 hours;

[0143] (3) Add 98.7g of dried polylactic acid resin, 1g of UV shielding agent prepared in step 1, and 0.3g of antioxidant 1010 into a high-speed mixer, mix evenly at 25°C, and mix at a high speed of 200 rpm Mix for 5 minutes;

[0144] (4) Add the product mixed in step 3 into a twin-screw extruder, and then cool and granulate after melt extrusion to obtain a masterbatch of polylactic acid composite material. The process is as follows: the temperature in the first zone is 180°C, and the temperature in the second zone is The temperature is 185°C, the temperatu...

Embodiment 2

[0147](1) Weigh 20g of nano-titanium dioxide and add it to 400mL ethanol solution, stir and ultrasonically oscillate for 60 minutes, adjust the system to PH=11 with sodium hydroxide solution, add 10mL tetraethyl orthosilicate, and stir at 40°C for 30 minutes Hours, filter under normal pressure, wash with deionized water, and dry at 150°C to obtain an ultraviolet shielding agent;

[0148] (2) Dry the polylactic acid resin at 70°C for 10 hours;

[0149] (3) Add 97.7g of dried polylactic acid, 2g of ultraviolet shielding agent prepared in step 1, and 0.3g of antioxidant 1010 into a high-speed mixer and mix evenly at 25°C, and mix at a high speed of 200 rpm for 5 minute;

[0150] (4) Add the raw materials mixed in step 3 into a twin-screw extruder, and then cool and granulate after melt extrusion to obtain polylactic acid composite material master batches. The process is as follows: the temperature in the first zone is 180°C, and the temperature in the second zone The temperatur...

Embodiment 3

[0153] (1) Weigh 10g of nano-titanium dioxide and add it to 100mL of isopropanol solution, stir and ultrasonically oscillate for 60 minutes, adjust the system to PH=9 with potassium hydroxide solution, add 5mL of methyl orthosilicate, and stir at 60°C to keep the temperature React for 30 hours, filter under reduced pressure, wash with deionized water for 4 times, and dry at 100°C to obtain an ultraviolet shielding agent;

[0154] (2) Dry the polylactic acid resin at 90°C for 10 hours;

[0155] (3) Add 99g of dried polylactic acid, 0.5g of the UV shielding agent prepared in step 1, and 0.3g of antioxidant 1010 into a high-speed mixer and mix evenly at 25°C, and mix at a high speed of 200 rpm for 5 minute;

[0156] (4) Add the raw materials mixed in step 3 into a twin-screw extruder, and then cool and granulate after melt extrusion to obtain polylactic acid composite material master batches. The process is as follows: the temperature in the first zone is 180°C, and the temperat...

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Abstract

The invention provides an ultraviolet screening agent, a preparation method thereof, a polylactic acid film containing the ultraviolet screening agent and a preparation method of the polylactic acid film. The ultraviolet screening agent prepared by taking nanometer titanium dioxide as a nuclear material and n-silicate ester as a nanometer silicon dioxide raw material and coating a nanometer silicon dioxide layer on the surface of nanometer titanium dioxide simultaneously has favorable ultraviolet screening effect and visible light permeating effect; the polylactic acid film prepared by preparing masterbatches through adding the ultraviolet screening agent and a thermal stabilizer into polylactic resin and then carrying out film pressing on the prepared masterbatches has favorable transparency and ultraviolet screening property; and the ultraviolet screening agent is nontoxic and strong in stability and is not easy to seep.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to an ultraviolet shielding agent and a preparation method thereof, a polylactic acid film containing the ultraviolet shielding agent and a preparation method thereof. Background technique [0002] With the rapid development of the national economy, the use of polymer materials has penetrated into all areas of people's lives, bringing great convenience to our lives, especially polymer film materials, which are widely used. However, most polymer film materials are difficult to degrade in nature, leading to serious environmental pollution problems. At the same time, the raw materials for synthesizing such polymer films come from limited and non-renewable petroleum resources, which do not meet the requirements of sustainable development of human beings. With the increasing shortage of resources and people's high attention to environmental issues, the development of fully biodegradable p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K13/06C08K9/06C08K9/04C08K3/22C08K3/36C08K5/134C09C1/36C09C3/08C09C3/12B29C47/92B29L7/00B29C48/92
Inventor 李根张秀芹王峰梁宁宁王锐阳明书
Owner BEIJING INST OF CLOTHING TECH
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