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Cellulose acetate transparent plastic and manufacturing method thereof

A technology of cellulose acetate and transparent plastics, applied in the field of cellulose acetate transparent plastics and its manufacture, can solve problems such as human hormone system and nervous system damage, and achieve the effects of excellent transparency, wide sources, and good mechanical properties

Active Publication Date: 2011-05-11
成都威昭行材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]The common plasticizers are phthalates, but they are carcinogenic. Long-term exposure to large quantities can cause damage to the human hormone system and nervous system. Some countries and organizations have imposed strict restrictions on the use of phthalates in products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] First weigh 100 parts by mass of cellulose acetate, 33 parts by mass of triethyl citrate, 0.15 parts by mass of tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester, β- (3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate 0.20 parts by mass, pentaerythritol bisphosphite bis(2,4-di-tert-butylphenyl) ester 0.15 parts by mass, di 0.20 parts by mass of stearyl pentaerythritol diphosphite;

[0031] Then, add the above-mentioned cellulose acetate and plasticizer into a high-speed mixer and stir. After mixing for 10 minutes, place the mixture in an airtight place at 25°C for more than 24 hours, and then mix it evenly with the antioxidant;

[0032] Next, the treated mixture is granulated with a twin-screw extruder. The temperature of each section of the twin-screw extruder starts from the feeding port, and is 160°C, 165°C, 168°C, 170°C, 170°C, and 170°C. The temperature is 168°C;

[0033] Finally, the pellets are dried and packaged.

Embodiment 2

[0035] First weigh 100 parts by mass of cellulose acetate, 43 parts by mass of triethyl citrate, 0.10 parts by mass of tetrakis(β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester, β- (3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate 0.20 parts by mass, pentaerythritol bisphosphite bis(2,4-di-tert-butylphenyl) ester 0.10 parts by mass, di 0.20 parts by mass of stearyl pentaerythritol diphosphite;

[0036] Then, add the above-mentioned cellulose acetate and plasticizer into a high-speed mixer and stir. After mixing for 10 minutes, place the mixture in an airtight place at 25°C for more than 24 hours, and then mix it evenly with the antioxidant;

[0037] Next, the treated mixture is granulated with a twin-screw extruder. The temperature of each section of the twin-screw extruder starts from the feeding port, and is 160°C, 165°C, 168°C, 170°C, 170°C, and 170°C. The temperature is 168°C;

[0038] Finally, the pellets are dried and packaged.

Embodiment 3

[0040] First weigh 100 parts by mass of cellulose acetate, 54 parts by mass of triethyl citrate, 0.20 parts by mass of octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, dihard 0.20 parts by mass of fatty pentaerythritol diphosphite;

[0041] Then, add the above-mentioned cellulose acetate and plasticizer into a high-speed mixer and stir. After mixing for 10 minutes, place the mixture in an airtight place at 25°C for more than 24 hours, and then mix it evenly with the antioxidant;

[0042] Next, the treated mixture is granulated with a twin-screw extruder. The temperature of each section of the twin-screw extruder starts from the feeding port, and is 160°C, 165°C, 168°C, 170°C, 170°C, and 170°C. The temperature is 168°C;

[0043] Finally, the pellets are dried and packaged.

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Abstract

The invention relates to a cellulose acetate transparent plastic, comprising the following components in parts by mass: 100 parts of cellulose acetate, 25-54 parts of plasticizer and 0.40-0.80 part of oxidation inhibitor, wherein the plasticizer is one of triethyl citrate, tributyl citrate and glycerol triacetate. The cellulose acetate transparent plastic has good transparency and good mechanical properties; the cellulose acetate is from green plants, thus being safe and environment-friendly; the plasticizer reduces the processing temperature, thus the cellulose acetate is not thermally decomposed when in processing; and the processing is simple, safe and clean, thus meeting the environmental requirements.

Description

technical field [0001] The invention relates to a cellulose acetate transparent plastic and a manufacturing method thereof. Background technique [0002] At present, common transparent plastics on the market include polymethyl methacrylate (PMMA), polystyrene (PS) and polycarbonate (PC), etc., and their raw materials are mainly fossil fuels such as coal and petroleum. The massive exploitation and extensive utilization of coal and petroleum not only pollutes the environment, but also gradually depletes fossil fuels as time goes by, posing a potential resource crisis. [0003] Cellulose acetate is a product obtained by the reaction of cellulose and acetic anhydride under certain conditions, and cellulose is the main component of green plants. It is rich in resources and has a wide range of sources. It can be mass-produced by artificial cultivation. [0004] At present, there are two ways to manufacture cellulose acetate transparent materials: one is to dissolve cellulose ace...

Claims

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Application Information

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IPC IPC(8): C08L1/12C08K5/11C08K5/103C08K5/134C08K5/526C08K5/524B29B9/06B29C47/92B29C48/92
CPCB29C48/04
Inventor 肖望东张全平徐令军林峰
Owner 成都威昭行材料科技有限公司
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