JP6835909B2 - 歯科用石膏粉末 - Google Patents
歯科用石膏粉末 Download PDFInfo
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- JP6835909B2 JP6835909B2 JP2019108018A JP2019108018A JP6835909B2 JP 6835909 B2 JP6835909 B2 JP 6835909B2 JP 2019108018 A JP2019108018 A JP 2019108018A JP 2019108018 A JP2019108018 A JP 2019108018A JP 6835909 B2 JP6835909 B2 JP 6835909B2
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- gypsum
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- reducing agent
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- 239000000843 powder Substances 0.000 title claims description 40
- 239000011505 plaster Substances 0.000 title description 7
- 239000010440 gypsum Substances 0.000 claims description 63
- 229910052602 gypsum Inorganic materials 0.000 claims description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- 239000003638 chemical reducing agent Substances 0.000 claims description 32
- 238000002156 mixing Methods 0.000 claims description 23
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 14
- 150000004683 dihydrates Chemical class 0.000 claims description 13
- 150000003839 salts Chemical class 0.000 claims description 13
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 10
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 10
- 235000011151 potassium sulphates Nutrition 0.000 claims description 10
- 229920001577 copolymer Polymers 0.000 claims description 9
- ATVJXMYDOSMEPO-UHFFFAOYSA-N 3-prop-2-enoxyprop-1-ene Chemical compound C=CCOCC=C ATVJXMYDOSMEPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000007792 addition Methods 0.000 claims 1
- 150000001990 dicarboxylic acid derivatives Chemical class 0.000 claims 1
- 230000000694 effects Effects 0.000 description 12
- 239000002002 slurry Substances 0.000 description 12
- 239000002253 acid Substances 0.000 description 11
- 238000004898 kneading Methods 0.000 description 9
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 238000011156 evaluation Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 229920000877 Melamine resin Polymers 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 210000000214 mouth Anatomy 0.000 description 4
- 150000001991 dicarboxylic acids Chemical class 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 229920001515 polyalkylene glycol Polymers 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 125000001174 sulfone group Chemical group 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- GXCDLJXPZVCHBX-UHFFFAOYSA-N 3-methylpent-1-yn-3-yl carbamate Chemical compound CCC(C)(C#C)OC(N)=O GXCDLJXPZVCHBX-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- IIACRCGMVDHOTQ-UHFFFAOYSA-N sulfamic acid Chemical compound NS(O)(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-N 0.000 description 2
- KEDHVYZRMXPBMP-UHFFFAOYSA-N 2-methyl-1-oxoprop-2-ene-1-sulfonic acid Chemical compound CC(=C)C(=O)S(O)(=O)=O KEDHVYZRMXPBMP-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 229920000084 Gum arabic Polymers 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 241000978776 Senegalia senegal Species 0.000 description 1
- BPHVHMBNGQRCNN-ZVGUSBNCSA-N [K].C([C@H](O)[C@@H](O)C(=O)O)(=O)O Chemical compound [K].C([C@H](O)[C@@H](O)C(=O)O)(=O)O BPHVHMBNGQRCNN-ZVGUSBNCSA-N 0.000 description 1
- 239000000205 acacia gum Substances 0.000 description 1
- 235000010489 acacia gum Nutrition 0.000 description 1
- 125000005396 acrylic acid ester group Chemical group 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000005228 aryl sulfonate group Chemical group 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- NLVXSWCKKBEXTG-UHFFFAOYSA-M ethenesulfonate Chemical compound [O-]S(=O)(=O)C=C NLVXSWCKKBEXTG-UHFFFAOYSA-M 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- PSZYNBSKGUBXEH-UHFFFAOYSA-M naphthalene-1-sulfonate Chemical compound C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-M 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 1
- 239000011970 polystyrene sulfonate Substances 0.000 description 1
- 229960002796 polystyrene sulfonate Drugs 0.000 description 1
- 229940111695 potassium tartrate Drugs 0.000 description 1
- 239000001472 potassium tartrate Substances 0.000 description 1
- 235000011005 potassium tartrates Nutrition 0.000 description 1
- 125000000020 sulfo group Chemical group O=S(=O)([*])O[H] 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Landscapes
- Dental Preparations (AREA)
Description
ポリカルボン酸塩系とは、従来から主にコンクリートの分野で使用されてきた物が使用可能であり、例えば、Cが5〜6の鎖状オレフィンとエチレン性不飽和ジカルボン酸無水物との共重合体の水溶性塩,ポリエチレングリコールモノアリルエーテルと不飽和ジカルボン酸との共重合体,ポリアルキレングリコールモノ(メタ)アクリル酸エステルと(メタ)アクリル酸との共重合体,末端にスルホン基を有する(メタ)アクリル酸アミドとアクリル酸エステルと(メタ)アクリル酸との共重合体,ビニルスルホネートやアリールスルホネートやメタクリルスルホネートのようにスルホン基を有する単量体と(メタ)アクリル酸とその他の単量体の共重合体,スルホン基で置換された芳香族環を有する単量体とマレイン酸との共重合体,末端にスルホン基を有する単量体とポリアルキレングリコールモノ(メタ)アクリル酸エステルとポリアルキレングリコールモノ(メタ)アクリル酸エーテルと(メタ)アクリル酸との4者共重合体等を例示することができる。
各実施例の配合を表1に、各比較例の配合を表2に纏めて示す。
各実施例及び各比較例にて作製した歯科用石膏粉末100gと水道水23gとをラバーボウルに入れ、石膏スパチュラにて混合しスラリーとした後、JIS T6605「歯科用硬質石膏」に定められた方法により物理的性質(硬化時間)を測定した。結果を表1及び表2に示す。
各実施例及び各比較例にて作製した歯科用石膏粉末100gと水道水23gとをラバーボウルに入れ、石膏スパチュラにて混合しスラリーとした後、JIS T6601「歯科鋳造用石こう系埋没材」に定められた方法によりこのスラリーの物理的性質(流動性)を測定した。結果を表1及び表2に示す。表中で評価を示す記号は以下の通りである。
◎ 60mmを超える
○ 40〜60mm
× 40mm未満
各実施例及び各比較例にて作製した歯科用石膏粉末100gと水道水23gとをラバーボウルに入れ、石膏スパチュラにて混合しスラリーとした。このスラリーを印象材へ流し込み5分経過後に印象材から石膏模型を取り外し、JIS T6605「歯科用硬質石膏」に定められた方法により物理的性質(強度)を測定した。結果を表1及び表2に示す。表中で評価を示す記号は以下の通りである。
◎ 10MPaを超える
○ 3〜10MPa
× 3MPa未満
Claims (3)
- α半水石膏100重量部に対して、二水石膏2〜4重量部、硫酸カリウム0.5〜3重量部、減水剤0.05〜0.8重量部が配合されており、その他の添加剤が合計で0.3重量部を超えて配合されていない歯科用石膏粉末であって、
前記減水剤は、ポリエチレングリコールモノアリルエーテルと不飽和ジカルボン酸との共重合体の水溶性塩である、歯科用石膏粉末。 - 前記減水剤の配合量が、前記α半水石膏100重量部に対して、0.15〜0.3重量部である、請求項1に記載の歯科用石膏粉末。
- 前記硫酸カリウムの配合量が、前記二水石膏の配合量に対して、25〜100重量%である、請求項1又は2に記載の歯科用石膏粉末。
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JP2019108018A JP6835909B2 (ja) | 2019-06-10 | 2019-06-10 | 歯科用石膏粉末 |
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JP2019108018A JP6835909B2 (ja) | 2019-06-10 | 2019-06-10 | 歯科用石膏粉末 |
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JP2017219206A Division JP6749304B2 (ja) | 2017-11-14 | 2017-11-14 | 歯科用石膏粉末 |
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JP2019151667A JP2019151667A (ja) | 2019-09-12 |
JP2019151667A5 JP2019151667A5 (ja) | 2019-11-07 |
JP6835909B2 true JP6835909B2 (ja) | 2021-02-24 |
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