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A kind of dental cad/cam machinable PMMA and its preparation method

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

Active Publication Date: 2021-08-17
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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  • A kind of dental cad/cam machinable PMMA and its preparation method

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. The raw materials used include MMA monomer, initiator, crosslinking agent and colorant; the MMA monomer, initiator and crosslinking agent are added to the In the reaction kettle, stir clockwise for 20-30 laps, then let it stand for 10-20 minutes, put it in a water bath at 60-80°C for pre-polymerization; take out the raw materials after pre-polymerization, put them in ice water and cool them to 20-30 ℃; then add the colorant to the pre-polymerized slurry, and then use a stirrer to stir for 30-60 minutes, put it into the mold according to the product specification by weight, and carry out the polymerization reaction. After the polymerization, remove the mold to obtain PMMA. The bulk polymerization method adopted by the invention has high production efficiency, no discharge of three wastes, simple process, small occupied area, 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 Patents(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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