CN105198343A - Ultrahigh hardness gypsum for dental department and preparation method thereof - Google Patents
Ultrahigh hardness gypsum for dental department and preparation method thereof Download PDFInfo
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- CN105198343A CN105198343A CN201510546895.3A CN201510546895A CN105198343A CN 105198343 A CN105198343 A CN 105198343A CN 201510546895 A CN201510546895 A CN 201510546895A CN 105198343 A CN105198343 A CN 105198343A
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Abstract
The invention relates to ultrahigh hardness gypsum for the dental department and a preparation method thereof, and belongs to the technical field of gypsum casting. The ultrahigh hardness gypsum is prepared from, by weight, 100 parts of alpha ultrahigh strength water gypsum powder, 12-15 parts of flexibilizer, 6-8 parts of modifying agent, 3-5 parts of conditioning agent, 4-6 parts of fibers and 0-5 parts of cement. The preparation method of the gypsum includes the steps that the gypsum raw materials are poured into a rubber bowl, an appropriate proportion of water is added, and vacuum mixing is conducted for 20-30 seconds after manual stirring is performed for 30-40 seconds or 10-15 seconds; a vacuum-stirred finished product is poured into a printing mold for duplicating a model, standing is carried out for 10-15 minutes, and the printing mold can be removed after curing is awaited to be completed. According to the ultrahigh hardness gypsum for the dental department, the formula is improved, and the defects that original gypsum for the dental department is small in strength and high in expansion rate are overcome.
Description
Technical field
The present invention relates to a kind of gypsum, be specifically related to superpower hardness gypsum of dental and preparation method thereof.
Background technology
Dental plaster is that dentist diagnoses requisite reconstructed model material in clinical manipulation and therapeutic process, and dentist can be made to carry out diagnosing, treating outside patient oral cavity, is a kind of important medical material.Medical dental plaster has higher requirement to the hardness of gypsum, the performance such as density and intensity, and current existing dental plaster performance is all difficult to reach requirement.
Disclose a kind of dental gypsum in the patent of invention " a kind of High-strength gypsum for dentistry " of application number 201210000045.X, its composition is 100 parts, alpha-semi water plaster stone powder; Toughener 3 ~ 10 parts; Water reducer 2 ~ 7 parts; Cement 0 ~ 5 part of Homogeneous phase mixing is made.This invention adopts the mode adding additive in common alpha-semi water plaster stone to improve the solidifiability of gypsum, improves the density of gypsum, intensity and hardness.But still there is performance deficiency in this gypsum, the defect that final gypsum product density, intensity and hardness cannot meet the demands.
Can find out, all there is the defect of hardness, density and insufficient strength in existing dental plaster, is difficult to satisfy the demand.
Summary of the invention
The object of the invention is, in order to overcome the above-mentioned defect existed in prior art, to provide superpower hardness gypsum of a kind of dental and preparation method thereof.
Superpower hardness gypsum of a kind of dental that the present invention proposes and preparation method thereof, raw material and the parts by weight of described gypsum are respectively: the strong water terra alba of α superelevation 100 parts, toughner 12-15 part, properties-correcting agent 6-8 part, conditioning agent 3-5 part, fiber 4-6 part, cement 0-5 part.
In technique scheme, described properties-correcting agent is one or more in treated starch, modified cyanic acid ester resin.
In technique scheme, described toughner is one or more in polysulfone resin, urethane.
In technique scheme, described conditioning agent is one or more in potassium sulfate, sodium sulfate, calcium sulfate, ferric sulfate, Tai-Ace S 150.
In technique scheme, described fiber is one or more in glass fibre, trevira or fibrous magnesium silicate.
In technique scheme, the granularity of the strong water terra alba of described α superelevation is 600 orders.
In technique scheme, the length of described fiber is 2.5-3mm.
Prepare the method for the superpower hardness gypsum of above-mentioned dental, comprise the following steps:
One, described gypsum raw material is poured in rubber bowl, add the water of appropriate ratio, manual stir 30-40 second or to stir after 10-15 second vacuum stirring 20-30 second more by hand;
Two, pour finished product complete for vacuum stirring in die reconstructed model, within standing 10-15 minute, wait and remove after cured.
In technique scheme, the weight ratio of described gypsum raw material and water is 100:20-22.
Superpower hardness gypsum of dental provided by the invention and preparation method thereof, adopts new formula and consumption, improves original dental gypsum intensity and the little defect of hardness, simultaneously the churning time of this gypsum and time of coagulation short, intensity increases substantially.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
Superpower hardness gypsum of dental that the present invention proposes and preparation method thereof, raw material and the parts by weight of gypsum are respectively: the strong water terra alba of α superelevation 100 parts, toughner 12-15 part, properties-correcting agent 6-8 part, conditioning agent 3-5 part, fiber 4-6 part, cement 0-5 part.
Wherein properties-correcting agent is one or more in treated starch, modified cyanic acid ester resin; Toughner is one or more in polysulfone resin, urethane; Conditioning agent is one or more in potassium sulfate, sodium sulfate, calcium sulfate, ferric sulfate, Tai-Ace S 150; Fiber is one or more in glass fibre, trevira or fibrous magnesium silicate; The granularity of the strong water terra alba of α superelevation is 600 orders; The length of fiber is 2.5-3mm.
Prepare the method for the superpower hardness gypsum of above-mentioned dental, comprise the following steps:
One, pour in rubber bowl by described gypsum raw material, add the water of appropriate ratio, the weight ratio of gypsum raw material and water is 100:20-22, stirs 30-40 second or to stir after 10-15 second vacuum stirring 20-30 second more by hand by hand subsequently;
Two, pour finished product complete for vacuum stirring in die reconstructed model, within standing 10-15 minute, wait and remove after cured.
Embodiment 1:
Dental superpower hardness gypsum: wherein gypsum raw material and parts by weight are respectively: the strong water terra alba of α superelevation 100 parts, treated starch 6 parts, cement 5 parts, polysulfone resin 12 parts, potassium sulfate 2 parts, 2 parts, sodium sulfate, fibrous magnesium silicate 5 parts, wherein the granularity of the strong water terra alba of α superelevation is 600 orders; The length of fibrous magnesium silicate is 2.5mm;
Preparation method is: pour in rubber bowl by above-mentioned gypsum raw material, add 20 parts of water in every 100 parts of gypsum raw materials, manual to stir after 10 seconds again vacuum stirring 25 seconds, pour finished product complete for vacuum stirring in die reconstructed model, leave standstill 15 minutes etc. to be solidified, take out after finished product solidification.
Embodiment 2:
Dental superpower hardness gypsum: wherein gypsum raw material and parts by weight are respectively: the strong water terra alba of α superelevation 100 parts, modified cyanic acid ester resin 6 parts, cement 3 parts, urethane 12 parts, 2 parts, ferric sulfate, 2 parts, Tai-Ace S 150,1 part, calcium sulfate, 5 parts, glass fibre, wherein the granularity of the strong water terra alba of α superelevation is 600 orders; The length of fibrous magnesium silicate is 3mm;
Preparation method is: pour in rubber bowl by above-mentioned gypsum raw material, adds 21 parts of water in every 100 parts of gypsum raw materials, and manual stirring after 40 seconds pours the complete finished product of stirring in die reconstructed model, and it is to be solidified to leave standstill 15 minutes etc., takes out after finished product solidification.
Embodiment 3:
Dental superpower hardness gypsum: wherein gypsum raw material and parts by weight are respectively: the strong water terra alba of α superelevation 100 parts, treated starch 2 parts, modified cyanic acid ester resin 4 parts, cement 5 parts, polysulfone resin 8 parts, urethane 4 parts, potassium sulfate 1 part, 1 part, sodium sulfate, 1 part, calcium sulfate, 1 part, ferric sulfate, 1 part, Tai-Ace S 150,5 parts, trevira, wherein the granularity of the strong water terra alba of α superelevation is 600 orders; The length of fiber is 3mm;
Preparation method is: pour in rubber bowl by above-mentioned gypsum raw material, add 22 parts of water in every 100 parts of gypsum raw materials, manual to stir after 15 seconds again vacuum stirring 30 seconds, pour finished product complete for vacuum stirring in die reconstructed model, leave standstill 15 minutes etc. to be solidified, take out after finished product solidification.
Detected by final gypsum product in above-described embodiment 1, embodiment 2, embodiment 3, and tested as a comparison case by existing dental plaster, performance is as shown in the table:
| Ultimate compression strength | Folding strength | Rate of expansion | Set time | Mixed water ratio | |
| Embodiment 1 | 50MPa | 21.5MPa | 0.1％ | 10-12min | 20-22 |
| Embodiment 2 | 48MPa | 21MPa | 0.15％ | 10-12min | 20-22 |
| Embodiment 3 | 52MPa | 22MPa | 0.12％ | 12-13min | 20-22 |
| Comparative example | 15-20MPa | 7-9MPa | 0.25％ | 15-20min | 25-30 |
Can find out, ultimate compression strength in above-mentioned three embodiments, folding strength, the index hinge structure such as rate of expansion all have larger improvement, the moisture needed also reduces accordingly, and particularly rate of expansion hinge structure is greatly reduced, and substantially reduces the expansion of gypsum in making processes, facilitate the disengaging of gypsum mold, higher folding strength and ultimate compression strength also reduce the possibility of gypsum breakage simultaneously.
The content be not described in detail in this specification sheets belongs to the known prior art of professional and technical personnel in the field.
Claims (9)
1. the superpower hardness gypsum of dental, is characterized in that: raw material and the parts by weight of described gypsum are respectively: the strong water terra alba of α superelevation 100 parts, toughner 12-15 part, properties-correcting agent 6-8 part, conditioning agent 3-5 part, fiber 4-6 part, cement 0-5 part.
2. according to the superpower hardness gypsum of the dental in claim 1, it is characterized in that: described properties-correcting agent is one or more in treated starch, modified cyanic acid ester resin.
3. according to the superpower hardness gypsum of the dental in claim 1, it is characterized in that: described toughner is one or more in polysulfone resin, urethane.
4. according to the superpower hardness gypsum of the dental in claim 1, it is characterized in that: described conditioning agent is one or more in potassium sulfate, sodium sulfate, calcium sulfate, ferric sulfate, Tai-Ace S 150.
5. according to the superpower hardness gypsum of the dental in claim 1, it is characterized in that: described fiber is one or more in glass fibre, trevira or fibrous magnesium silicate.
6. according to the superpower hardness gypsum of the dental in claim 1, it is characterized in that: the granularity of the strong water terra alba of described α superelevation is 600 orders.
7. according to the superpower hardness gypsum of the dental in claim 5, it is characterized in that: the length of described fiber is 2.5-3mm.
8. prepare a method for the superpower hardness gypsum of dental according to any one of claim 1-7, it is characterized in that, comprise the following steps:
One, described gypsum raw material is poured in rubber bowl, add the water of appropriate ratio, manual stir 30-40 second or to stir after 10-15 second vacuum stirring 20-30 second more by hand;
Two, pour finished product complete for vacuum stirring in die reconstructed model, within standing 10-15 minute, wait and remove after cured.
9. according to Claim 8 in the method preparing the superpower hardness gypsum of dental, it is characterized in that: the weight ratio of described gypsum raw material and water is 100:20-22.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108059376A (en) * | 2017-12-29 | 2018-05-22 | 应城市嘉鸿技术服务科技有限公司 | A kind of preparation method of dental models gypsum |
| CN108129123A (en) * | 2018-02-01 | 2018-06-08 | 南宁越洋科技有限公司 | The preparation method of the super hard gypsum oral cavity model of hydroxyapatite crystal whisker enhancing |
| CN110105036A (en) * | 2019-03-26 | 2019-08-09 | 合肥卓越义齿制作有限公司 | A kind of preparation method of low bulk dental gypsum |
| CN110730640A (en) * | 2017-06-13 | 2020-01-24 | 株式会社Gc | Dental gypsum slurry |
| CN113666704A (en) * | 2021-08-23 | 2021-11-19 | 深圳市青青源科技有限公司 | Method for improving powder falling of dental gypsum |
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| US5374448A (en) * | 1991-06-29 | 1994-12-20 | Bayer Aktiengesellschaft | Process for the production of stiffening materials containing hydraulic binders, in particular of plaster bandages |
| CN102757191A (en) * | 2012-01-01 | 2012-10-31 | 洛阳北苑特种陶瓷有限公司 | High-strength gypsum for dentistry |
| CN103784328A (en) * | 2012-09-26 | 2014-05-14 | 株式会社Gc | Dental gypsum-bonded investment material powder |
| CN103845227A (en) * | 2012-12-06 | 2014-06-11 | 株式会社三祐 | Composition of flow type gypsum for dental operation and the method of preparing therof |
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2015
- 2015-08-29 CN CN201510546895.3A patent/CN105198343A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5374448A (en) * | 1991-06-29 | 1994-12-20 | Bayer Aktiengesellschaft | Process for the production of stiffening materials containing hydraulic binders, in particular of plaster bandages |
| CN102757191A (en) * | 2012-01-01 | 2012-10-31 | 洛阳北苑特种陶瓷有限公司 | High-strength gypsum for dentistry |
| CN103784328A (en) * | 2012-09-26 | 2014-05-14 | 株式会社Gc | Dental gypsum-bonded investment material powder |
| CN103845227A (en) * | 2012-12-06 | 2014-06-11 | 株式会社三祐 | Composition of flow type gypsum for dental operation and the method of preparing therof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110730640A (en) * | 2017-06-13 | 2020-01-24 | 株式会社Gc | Dental gypsum slurry |
| US11583376B2 (en) | 2017-06-13 | 2023-02-21 | Gc Corporation | Dental gypsum slurry |
| CN108059376A (en) * | 2017-12-29 | 2018-05-22 | 应城市嘉鸿技术服务科技有限公司 | A kind of preparation method of dental models gypsum |
| CN108059376B (en) * | 2017-12-29 | 2020-12-08 | 青岛大学附属医院 | Preparation method of dental model gypsum |
| CN108129123A (en) * | 2018-02-01 | 2018-06-08 | 南宁越洋科技有限公司 | The preparation method of the super hard gypsum oral cavity model of hydroxyapatite crystal whisker enhancing |
| CN108129123B (en) * | 2018-02-01 | 2019-11-05 | 南宁越洋科技有限公司 | The preparation method of the super hard gypsum oral cavity model of hydroxyapatite crystal whisker enhancing |
| CN110105036A (en) * | 2019-03-26 | 2019-08-09 | 合肥卓越义齿制作有限公司 | A kind of preparation method of low bulk dental gypsum |
| CN113666704A (en) * | 2021-08-23 | 2021-11-19 | 深圳市青青源科技有限公司 | Method for improving powder falling of dental gypsum |
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