CN102993330A - Preparation method of alginate for dental impression material - Google Patents
Preparation method of alginate for dental impression material Download PDFInfo
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- CN102993330A CN102993330A CN2012105576865A CN201210557686A CN102993330A CN 102993330 A CN102993330 A CN 102993330A CN 2012105576865 A CN2012105576865 A CN 2012105576865A CN 201210557686 A CN201210557686 A CN 201210557686A CN 102993330 A CN102993330 A CN 102993330A
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- alginate
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Abstract
The invention provides a preparation method of alginate for a dental impression material. The preparation method comprises the following steps of: based on properly-selected brown seaweed as a raw material, controlling a digestion condition, diluting glue solution and filtering by the means that kieselguhr is taken as filter aid, extracting alginic acid in an acidification way, neutralizing liquid phase, drying in combination with airflow and microwave energy, and smashing. According to the preparation method, the impression material is enabled to be better in compressive strength and elasticity, and good in deformation recoverability from the raw material; after the extraction technology is controlled, the products can be enabled to meet the requirement of viscosity, the purity of products can be improved, and the performance of the impression material can be preferably improved; and after the preparation method uses the drying mode which combines the airflow and the microwave energy, the moisture in the alginate can be reduced, and the stability of products can be improved.
Description
Technical field
The invention belongs to alginate preparation method field, relate in particular to a kind of tooth section moulage with the preparation method of alginate.
Background technology
The reaction principle of alginate impression material is: alginate form calcium alginate gel with the calcium sulfate reaction in the aqueous solution, by the phosphoric acid salt control reaction times, form the irreversible moulage of a kind of elasticity.This alginate cooperate the tooth section moulage that forms, and are present most widely used class moulages, and alginate commonly used have sodium alginate, potassium alginate.
In order to obtain accurate die, moulage must possess certain performance requriements: powder has good flowability, dispersiveness and stable; Use operation to keep certain operating time, suitable setting time; Film forming have certain ultimate compression strength, elasticity and good deformation restorative.
Alginate are as the main film forming base-material of moulage, and its quality directly affects the performance of moulage.The stability of the moisture of alginate, viscosity influence powder, viscosity, granularity and purity affect the complete degree of reaction in flowability and operating time, guluronic acid and mannuronic acid-content recover than affecting gel-strength, elasticity and deformation, and the prescription of alginate impression material and the quality of other compositions also can affect the die performance certainly.Therefore must be targetedly the indexs such as the moisture of moulage and alginate, granularity, viscosity, purity be studied.
Data about tooth family alginate impression material has a lot, relevant for the sodium alginate technology of preparing, also to have fill a prescription requires, such as patent CN10181183A high-strength tooth family alginate impression material, by selecting the stronger high G alginates of gel rigidity, add one or more in xanthan gum, tragacanth gum, the sodium polyacrylate, with the alginates synergy, improve the gel snappiness, make high-strength tooth family alginate impression material, this patent has only solved the low problem of alginate impression material intensity from filling a prescription.But the alginate that tooth section moulage is used carry out the total quality requirement, and form specific preparation method's the report that yet there are no.
Summary of the invention
The invention provides a kind of tooth section moulage with the preparation method of alginate, high, the good stability of the alginate purity of utilizing the inventive method to produce, can improve flowability and the delivery number of alginate impression material, the bad problem of form-stability that has solved the alginate impression material syneresis, oozed profit and then cause, thereby improved the accuracy of alginate impression material, the tooth section moulage that makes has good film forming properties and stability.
For achieving the above object, the present invention adopts following technical proposals to be achieved:
A kind of tooth section moulage is with the preparation method of alginate, and it may further comprise the steps:
(1) brown alga take guluronic acid content as 45-65% is raw material, and water embathes, after the alkali digestion, and thin up, foaming, floating separation make clear glue solution;
(2) use flocculating aids that clear glue solution is filtered and obtain glue;
(3) the glue acid adding after the filtration changes into Lalgine, dehydration;
(4) Lalgine after the dehydration adds alkali lye to pH6-8 take organic solvent as medium;
(5) dehydration is used air stream drying to combine with micro-wave energy and is carried out drying, pulverizes.
To further improvement in the technical proposal: the condition of alkali digestion is temperature 45-75 ℃ in the described step (1), and digestion time is 8-14h.
To further improvement in the technical proposal: flocculating aids is diatomite in the described step (2), and filter plant is that pressure type filters or vacuum filter.
To further improvement in the technical proposal: the used acid of acidifying is 5-15% sulfuric acid or hydrochloric acid in the described step (3).
To further improvement in the technical proposal: used alkali is sodium hydroxide or potassium hydroxide in the described step (4).
To further improvement in the technical proposal: the organic solvent in the described step (4) is one or more in methyl alcohol, ethanol, Virahol, the acetone.
To further improvement in the technical proposal: uses air stream drying to moisture content to be 15-25% in the described step (5), re-use micro-wave energy and be dried to moisture 5-15%.
To further improvement in the technical proposal: the used equipment of air stream drying is a kind of in flash dryer, impulse air flow drier or the boiling drier in the described step (5).
To further improvement in the technical proposal: described step is crushed to the 150-200 order in (5).
Compared with prior art, advantage of the present invention and positively effect are:
1, to select guluronic acid content be the brown alga of 45-65% in the present invention, guarantees that from raw material moulage has better ultimate compression strength, elasticity and good deformation is restorative.
2, the present invention passes through the extraction process of control alginate, thereby guarantees that goods meet the viscosity requirement, improves the purity of product, is conducive to improve the performance of moulage.
3, the present invention combines air-flow with micro-wave energy drying mode is applied to dry alginate, alginate are water-soluble colloid, in fact the alginate molecule all with the 1-2 molecule in conjunction with water, use conventional drying mode, alginate self form film easily in drying process, hinder the evaporation of internal moisture, it is very low very difficult to cause the drying mode that uses routine to be dried to moisture, need high temperature, for a long time, this viscosity and performance to alginates is destroyed very serious, the drying mode that the present invention uses air-flow to combine with micro-wave energy had both reduced the moisture in the alginate, had improved again the stability of product.
Embodiment
Below in conjunction with embodiment technical scheme of the present invention is described in further detail.
Embodiment 1
Tooth of the present invention section moulage may further comprise the steps with the preparation method of alginate:
1, select the bulk kelp (Lessonia Nigrescens) of guluronic acid content 47%, soak washing after, add soda ash at 70 ℃ of lower digestion 10h, then thin up filters, foaming, floating separation make clear glue solution.
2, carry out the essence filter take diatomite as flocculating aids and obtain glue;
3, the glue after essence is filtered adds 10% sulfuric acid conversion and becomes Lalgine, and dewaters;
4, the Lalgine after the dehydration take alcohol as medium, is neutralized to pH6-8 with sodium hydroxide.
5, after the dehydration granulation, be dried to moisture 20% with the boiling type drying machine, be dried to moisture content 11% with micro-wave energy again, be crushed to 200 orders.
Gained sodiun alginate product viscosity: 270mPas, pH:6.3,1% solution transparency 43cm, moisture 11%.
Embodiment 2
Tooth of the present invention section may further comprise the steps with the preparation method of alginate impression material:
1, select the bulk kelp (Lessonia Flavicans) of guluronic acid content 62%, soak washing after, add soda ash at 68 ℃ of lower digestion 12h, then thin up filters, foaming, floating separation make clear glue solution.
2, carry out the essence filter take diatomite as flocculating aids and obtain glue;
3, the glue after essence is filtered adds 10% hydrochloric acid and changes into Lalgine, and dewaters;
4, after the Lalgine dehydration, take methyl alcohol as medium, be neutralized to pH6-8 with potassium hydroxide.
5, after the dehydration granulation, to moisture 22%, be dried to moisture 12% with microwave dryer with flash dryer again, be crushed to 170 orders.
Gained potassium alginate product viscosity: 390 mPas, pH:7.3,1% solution transparency 48cm, moisture 12%.
Above embodiment is only in order to illustrating technical scheme of the present invention, but not limits it; Although with reference to previous embodiment the present invention is had been described in detail, for the person of ordinary skill of the art, still can make amendment to the technical scheme that previous embodiment is put down in writing, perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of the present invention's technical scheme required for protection.
Claims (9)
1. a tooth section moulage is characterized in that it may further comprise the steps with the preparation method of alginate:
(1) brown alga take guluronic acid content as 45-65% is raw material, and water embathes, after the alkali digestion, and thin up, foaming, floating separation make clear glue solution;
(2) use flocculating aids that clear glue solution is filtered and obtain glue;
(3) the glue acid adding after the filtration changes into Lalgine, dehydration;
(4) Lalgine after the dehydration adds alkali lye to pH6-8 take organic solvent as medium;
(5) dehydration is used air stream drying to combine with micro-wave energy and is carried out drying, pulverizes.
2. a kind of tooth according to claim 1 section moulage is characterized in that with the preparation method of alginate the condition of alkali digestion in the described step (1) is temperature 45-75 ℃, and digestion time is 8-14h.
3. a kind of tooth according to claim 1 section moulage is characterized in that with the preparation method of alginate flocculating aids is diatomite in the described step (2), and filter plant is that pressure type filters or vacuum filter.
4. a kind of tooth according to claim 1 and 2 section moulage is characterized in that with the preparation method of alginate the used acid of acidifying is 5-15% sulfuric acid or hydrochloric acid in the described step (3).
5. a kind of tooth according to claim 1 section moulage is characterized in that with the preparation method of alginate alkali used in the described step (4) is sodium hydroxide or potassium hydroxide.
6. a kind of tooth according to claim 1 section moulage is with the preparation method of alginate, it is characterized in that organic solvent in the described step (4) is one or more in methyl alcohol, ethanol, Virahol, the acetone.
7. a kind of tooth according to claim 1 and 2 section moulage is characterized in that using air stream drying to moisture content to be 15-25% in the described step (5) with the preparation method of alginate, re-uses micro-wave energy and is dried to moisture 5-15%.
8. a kind of tooth according to claim 7 section moulage is with the preparation method of alginate, it is characterized in that the used equipment of air stream drying in the described step (5) is a kind of in flash dryer, impulse air flow drier or the boiling drier.
9. a kind of tooth according to claim 1 section moulage is characterized in that being crushed to the 150-200 order in the described step (5) with the preparation method of alginate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210557686.5A CN102993330B (en) | 2012-12-20 | 2012-12-20 | Preparation method of alginate for dental impression material |
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| CN201210557686.5A CN102993330B (en) | 2012-12-20 | 2012-12-20 | Preparation method of alginate for dental impression material |
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| CN102993330A true CN102993330A (en) | 2013-03-27 |
| CN102993330B CN102993330B (en) | 2014-12-24 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1976983A (en) * | 2004-05-21 | 2007-06-06 | 苏维拉克皮肤及健康护理有限公司 | Method for producing alginate-containing porous shaped bodies |
| CN101227913A (en) * | 2004-10-12 | 2008-07-23 | Fmc生物聚合物联合股份有限公司 | Self-gelling alginate systems and uses thereof |
| CN102060938A (en) * | 2010-12-24 | 2011-05-18 | 青岛明月海藻集团有限公司 | Method for extracting algin through comprehensively utilizing brown algae |
| CN102811696A (en) * | 2010-04-22 | 2012-12-05 | 德山齿科株式会社 | Alginic acid-containing aqueous composition, alginate impression material for dental applications, and substrate for alginate impression material for dental applications |
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2012
- 2012-12-20 CN CN201210557686.5A patent/CN102993330B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1976983A (en) * | 2004-05-21 | 2007-06-06 | 苏维拉克皮肤及健康护理有限公司 | Method for producing alginate-containing porous shaped bodies |
| CN101227913A (en) * | 2004-10-12 | 2008-07-23 | Fmc生物聚合物联合股份有限公司 | Self-gelling alginate systems and uses thereof |
| CN102811696A (en) * | 2010-04-22 | 2012-12-05 | 德山齿科株式会社 | Alginic acid-containing aqueous composition, alginate impression material for dental applications, and substrate for alginate impression material for dental applications |
| CN102060938A (en) * | 2010-12-24 | 2011-05-18 | 青岛明月海藻集团有限公司 | Method for extracting algin through comprehensively utilizing brown algae |
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Effective date of registration: 20161212 Address after: 224100 Jiangsu province Yancheng City District Dafeng saline land marine industry science and Technology Park Patentee after: Jiangsu Mingyue Marine Biotechnology Co., Ltd. Address before: 266400 Qingdao, Shandong Province, the city of Jiaonan Road, No. 67 Patentee before: Qingdao Bright Moon Seaweed Group Co., Ltd. |