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Modified cellulose diacetate as well as preparation method and application thereof

A modified technology of cellulose diacetate, applied in the direction of additive processing, etc., can solve the problems of weak layer-to-layer adhesion, yellowing of product color, high melt viscosity, etc., and achieve bright surface, good chroma, Effect of increasing melt viscosity

Active Publication Date: 2019-03-22
SICHUAN PUSH CELLULOSE ACETATE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defects of the existing cellulose acetate as 3D printing materials, such as high melt viscosity, broken filaments, material blocking, weak adhesion between layers, and product color yellowing or even blackening, the present invention provides a Modified cellulose diacetate and its preparation method

Method used

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  • Modified cellulose diacetate as well as preparation method and application thereof
  • Modified cellulose diacetate as well as preparation method and application thereof
  • Modified cellulose diacetate as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In terms of weight percentage, according to the total amount designed in the test, weigh 0.2% hindered phenolic stabilizer 1076 and 0.2% phosphite stabilizer 626 in 20% plasticizer DOP according to the following proportions, and the dispersed The stabilizer solution was mixed with 77.8% cellulose diacetate in a high-speed mixer for 40 minutes, and after 12 hours of aging at room temperature, 1.8% dialkyl peroxide was added. The peroxide R 4 It is a tert-butyl group, L is a C straight chain containing 6 C atoms, mix evenly and extrude and granulate on a twin-screw machine. ℃, 205°C, 210°C, 215°C, 225°C, the head temperature is 225°C, the host speed is 120r / min, and the feeding speed is 40r / min to obtain transparent rubber particles, which are finally dried and packaged.

Embodiment 2

[0043] In percent by weight, according to the total amount designed in the test, weigh 0.2% hindered phenolic stabilizer 1098 and 0.5% phosphite stabilizer 626 and dissolve them in 32% plasticizer DMP according to the following proportions, and the dispersed The stabilizer solution was mixed with 67.2% cellulose diacetate in a high-speed mixer for 40 minutes, and after aging at room temperature for 15 hours, 0.1% acyl peroxide was added. The peroxide R 2 For acetyl, mix evenly and extrude and granulate on the twin-screw machine. The twin-screw machine starts from the feeding section, and the temperature settings are 160°C, 185°C, 200°C, 205°C, 205°C, 210°C, 215°C, and 225°C. , the head temperature is 225°C, the host speed is 120r / min, and the feeding speed is 40r / min to obtain transparent rubber particles, which are finally dried and packaged.

Embodiment 3

[0045] In terms of weight percentage, according to the total amount designed in the test, weigh 0.5% hindered phenolic stabilizer 1010 and 0.3% phosphite stabilizer 168 in 45% plasticizer DEP according to the following proportions, and the dispersed The stabilizer solution was mixed with 54.199% cellulose diacetate in a high-speed blender for 40 minutes, aged at room temperature for 12 hours and added with 0.001% dialkyl peroxide, the peroxide R 3 It is tert-butyl, and after mixing evenly, it is extruded and granulated on a twin-screw machine. The twin-screw machine starts from the feeding section, and the temperature settings are 160°C, 185°C, 200°C, 205°C, 205°C, 210°C, 215°C, 225°C, the temperature of the head is 225°C, the speed of the main machine is 120r / min, and the feeding speed is 40r / min to obtain transparent rubber particles, which are finally dried and packaged.

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Abstract

The invention belongs to the field of cellulose diacetate products, and particularly relates to a modified cellulose diacetate product as well as a preparation method and application thereof to 3D printing and other fields. The modified cellulose diacetate provided by the invention is prepared by mixing cellulose diacetate, a plasticizer, a hindered phenol antioxidant, a phosphite antioxidant andperoxide. The cellulose diacetate can be used as a 3D printing material for preparing products by adopting a 3D printing method.

Description

technical field [0001] The invention belongs to the field of cellulose diacetate products, and specifically relates to a modified cellulose diacetate product and a preparation method thereof, as well as the field of 3D printing or packaging materials and spectacle frames. Background technique [0002] 3D printing technology, based on three-dimensional mathematical model data, realizes the technology of layer-by-layer accumulation and generation of three-dimensional objects by melting or dissolving materials. Commonly used 3D printing materials include thermoplastics, photosensitive resins, rubber materials, metal materials, and ceramic materials. The state of materials includes but is not limited to powder, pellets, silk, liquid, and thin materials (paper, plastic film), etc. Many forms. Thermoplastic high molecular polymers, whose processing methods include blow molding, extrusion, injection molding, pressing and other hot melting methods, the processing temperature is muc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/12C08K5/14C08K5/134C08K5/526C08K5/12C08K5/20
CPCB33Y70/00C08K5/00C08K5/12C08K5/1345C08K5/14C08K5/20C08K5/526C08L2201/08C08L2201/10C08L1/12
Inventor 杨齐俞文骥邹耀邦张梅王燕赵军胜
Owner SICHUAN PUSH CELLULOSE ACETATE CO LTD
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