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Dental CAD/CAM machinable PMMA and preparation method thereof

A CAD and dental technology, applied in the field of producing dental CAD/CAM machinable PMMA, can solve the problems of small molecular weight, poor heat resistance and poor mechanical properties of PMMA, and achieve high molecular weight, good heat resistance and high production efficiency. Effect

Active Publication Date: 2019-01-04
AIDITE (QINHUANGDAO) TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] In view of this, the present invention provides a kind of adopting bulk polymerization method to produce dental CAD / CAM can cut PMMA preparation method, mainly solves the problem that the PMMA produced by other processes has small molecular weight, poor mechanical properties, poor heat resistance, incisor sticking knife , and the bulk polymerization method used in the present invention has high production efficiency, no three wastes discharge, simple process, small footprint, low cost, and convenient equipment cleaning

Method used

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  • Dental CAD/CAM machinable PMMA and preparation method thereof
  • Dental CAD/CAM machinable PMMA and preparation method thereof
  • Dental CAD/CAM machinable PMMA and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Weigh 100 parts of MMA monomer, 2 parts of initiator (AIBN: BPO=1:1) and 3 parts of crosslinking agent (TAC: DOP=2:1) ​​into the reactor, stir clockwise for 20 laps, and then Let it stand for 10 minutes, put it into a water bath at 65°C for pre-polymerization;

[0053] Take out the pre-polymerized raw materials, put them in ice water and cool to 30°C; then weigh 1 part of the colorant and add it to the pre-polymerized slurry, then use a stirrer to stir for 30 minutes, and put it into the mold according to the product specification by weight , and then carry out the polymerization reaction of four stages in the later stage, the first low-temperature polymerization stage at 20°C, 800min; the second low-temperature polymerization stage at 40°C, 1000min; the first high-temperature polymerization stage at 60°C, 500min; After the polymerization is completed, demolding is carried out to obtain PMMA products.

Embodiment 2

[0055] Weigh 110 parts of MMA monomer, 3 parts of initiator (AIBN: BPO=1:1) and 4 parts of crosslinking agent (TAC: DOP=2:1) ​​into the reactor, stir clockwise for 20 laps, and then Let it stand for 15 minutes, put it into a water bath at 70°C for pre-polymerization;

[0056] Take out the pre-polymerized raw materials, put them in ice water and cool to 30°C; then weigh 2 parts of the colorant and add it to the pre-polymerized slurry, then use a stirrer to stir for 35 minutes, and put it into the mold according to the product specification by weight , and then carry out the polymerization reaction of four stages in the later stage, the first low-temperature polymerization stage at 20°C, 800min; the second low-temperature polymerization stage at 40°C, 1000min; the first high-temperature polymerization stage at 60°C, 500min; After the polymerization, demoulding is carried out to obtain PMMA products.

Embodiment 3

[0058] Weigh 120 parts of MMA monomer, 2 parts of initiator (AIBN: BPO=1:1) and 4 parts of crosslinking agent (TAC: DOP=2:1) ​​into the reactor, stir clockwise for 30 laps, and then Let it stand for 20 minutes, put it into a water bath at 75°C for pre-polymerization;

[0059] Take out the pre-polymerized raw materials, put them in ice water and cool to 30°C; then weigh 3 parts of the colorant and add them to the pre-polymerized slurry, then use a stirrer to stir for 30 minutes, and put them into the mold according to the product specifications by weight , and then carry out the polymerization reaction of four stages in the later stage, the first low-temperature polymerization stage at 30°C, 800min; the second low-temperature polymerization stage at 40°C, 1000min; the first high-temperature polymerization stage at 55°C, 500min; After the polymerization, demoulding is carried out to obtain PMMA products.

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Abstract

The invention discloses a dental CAD / CAM machinable PMMA and a preparation method thereof. Raw materials used are MMA monomers, initiators, cross-linking agents and colorants; the MMA monomers, the initiators and the cross-linking agents are added to a reactor, clockwise stirring of 20-30 turns is conducted, standing is conducted for 10-20 minutes, the MMA monomers, the initiators and the cross-linking agents are put into a water bath at 60-80 DEG C, and pre-polymerization is carried out; the raw materials are taken out after the pre-polymerization is completed, and the raw materials are placed in ice water to be cooled to 20-30 DEG C; the colorants are added to pre-polymerized slurry, then stirred for 30-60 minutes by using a stirrer, and packed into a mold by weight according to the product specifications, a polymerization reaction is carried out, after the completion of the polymerization, the mold is removed, and the PMMA is obtained. A bulk polymerization method has high production efficiency, no waste discharge, simple process, small floor space, low cost and convenient equipment cleaning.

Description

technical field [0001] The present invention relates to chemical industry field, more specifically, relate to a kind of adopting bulk polymerization method to produce dental CAD / CAM can cut PMMA preparation method. Background technique [0002] PMMA is the abbreviation code of polymethyl methacrylate. It is a relatively early developed thermoplastic amorphous polymer with a glass transition temperature of about 100°C. It has high strength and good light aging resistance. It has excellent tensile strength and Bending strength has been used in artificial joints, artificial bones and dentistry. PMMA has been used as a dental material in the oral cavity for decades, and can be used in dental temporary crowns and bridges, implant guides and dental models. [0003] CAD is computer-aided design (CAD-Computer Aided Design), which uses computers and graphics equipment to help designers carry out design work; the core of CAM (computer-aided manufacturing, computer-aided manufacturing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F226/06
CPCC08F220/14C08F226/06
Inventor 李洪文王萌乔春梅陈莹莹
Owner AIDITE (QINHUANGDAO) TECH CO LTD
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