1. (canceled)
2. A dental cement comprising:
a liquid agent comprising
5 to 50% by weight of (meth)acrylate monomer having an acid group,
0.1 to 25% by weight of water,
30 to 85% by weight of (meth)acrylate monomer having two or less hydroxyl groups andor amino groups, not having an acid group, and having a molecular weight of 160 or more, and
0.01 to 5% by weight of an amine compound as a polymerization initiator for a polymerization catalyst in a powder agent described below; and
a powder agent comprising
90 to 99.8% by weight of a metal oxide powder used for a fluoroaluminosilicate glass powder, a dental zinc phosphate cement powder or a dental carboxylate cement powder, and
0.01 to 5% by weight of the total of an organic aromatic compound containing at least one \u2014SO2\u2014 group and a peroxide as a polymerization catalyst.
3. The dental cement as claimed in claim 2, wherein
the (meth)acrylate monomer having an acid group has a carboxyl group as the acid group, and is in the form of an aqueous solution.
4. The dental cement as claimed in claim 2, wherein the (meth)acrylate monomer having an acid group has a phosphoric acid group or a carboxyl group as the acid group.
5. The dental cement as claimed in claim 4, wherein the (meth)acrylate monomer having an acid group has a phosphoric acid group.
6. The dental cement as claimed in claim 5, wherein the (meth)acrylate monomer having an acid group is at least one member selected from the group consisting of 2-(meth) acryloyloxyethyl dihydrogen phosphate, bis(meth) acryloxyethyl phosphate, bis2-(meth)acryloyloxyethyl hydrogen phosphate, 2-(meth) acryloyloxyethylphenyl hydrogen phosphate, acid phosphoxyethyl(meth) acrylate, 6-(meth)acryloyloxyhexyl dihydrogen phosphate, 6-(meth)acryloyloxyhexylphenyl hydrogen phosphate, 10-(meth)acryloyloxydecyl dihydrogen phosphate, 1,3-di(meth)acryloylpropane-2-dihydrogen phosphate, 1,3-di(meth)acryloylpropane-2-phenyl hydrogen phosphate, bis5-{2-(meth) acryloyloxyethoxycarbonyl} heptyl hydrogen phosphate, a reaction product obtained by reacting an additional polymer of 6-hexanolide of 2-hydroxyethyl(meth) acrylate with anhydrous phosphoric acid, and mixtures thereof.
7. The dental cement as claimed in claim 4, wherein the (meth)acrylate monomer having an acid group has a carboxyl group as the acid group.
8. The dental cement as claimed in claim 7, wherein the (meth)acrylate monomer having an acid group is at least one member selected from the group consisting of 4-(meth) acryloxyethyltrimellitic acid, 4-(meth)acryloxyethyltrimellitic acid anhydride, 4-(meth)acryloxydecyltrimellitic acid, 4-(meth) acryloxydecyltrimellitic acid anhydride, 11-(meth)acryloyloxy- 1,1-undecanedicarboxylic acid, 1,4 di(meth)acryloyloxypyromellitic acid, 2-(meth)acryloyloxyethylmaleic acid, 2-(meth)acryloyloxyethylphthalic acid, 2-(meth)acryloyloxyethylhexahydrophthalic acid, and mixtures thereof.
9. The dental cement as claimed in claim 2, wherein the (meth)acrylate monomer having two or less hydroxyl groups andor amino groups, not having an acid group, is at least one member selected from the group consisting of benzyl(meth)acrylate, 2,2-bis(meth) acryloxyphenyl propane, 2,2-bis4-(meth)acryloxydiethoxyphenyl propane, 2,2-bis4-(meth)acryloxypolyethoxyphenyl propane, ethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, butylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, 1,3-butanediol di(meth)acrylate, 1,4-butanediol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, trimethylolmethane tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, 2-hydroxyethyl(meth) acrylate, 2-hydroxypropyl(meth)acrylate, 2-hydroxy- 1,3 -di(meth) acryloxypropane, 1,2-dihydroxy-3-(meth)acryloxypropane, 2,2-bis4-{2-hydroxy-3-(meth)acryloxypropoxy} phenyl propane, and mixtures thereof.
10. The dental cement as claimed in claim 2, wherein the amine compound is at least one member selected from the group consisting of N,N-dimethyl-p-toluidine, N,N-diethyl-p-toluidine, N,N-dimethylaniline, N,N-bis(2-hydroxyethyl)-p-toluidine, N,N-dimethylaminoethylmethacrylate, triethanolamine, 4-methyl dimethylamino benzoate, 4-ethyl dimethylamino benzoate, 4-isoamyl dimethylamino benzoate, triethylamine, N-ethyl diethanol amine, triethanol amine, and mixtures thereof.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A solenoid on-off valve comprising:
a housing including a primary space connected to a primary port, a secondary space connected to a secondary port, and a valve port defined by a valve seat and connecting the primary space and the secondary space;
a main valve body provided in the housing to be displaceable;
a seat member provided at the main valve body and pressed on the valve seat to close the valve port;
a pilot valve body coupled to the main valve body and relatively displaceable with respect to the main valve body; and
an electromagnetic drive unit configured to displace the pilot valve body by an electromagnetic force, wherein
the seat member is configured such that: a pilot passage is formed to connect the primary space and the secondary space; and the pilot valve body is pressed on the seat member to close the pilot passage.
2. The solenoid on-off valve according to claim 1, wherein:
the main valve body includes at one end portion thereof a through hole portion through which the seat member is inserted; and
the seat member includes at an axially intermediate portion of an outer peripheral wall thereof a flange portion projecting in a radially outward direction and is fixed to the main valve body by fitting the flange portion in a concave portion formed at an axially intermediate portion of the through hole portion.
3. The solenoid on-off valve according to claim 2, wherein the through hole portion of the main valve body and the outer peripheral wall of the seat member are formed such that in a state where the seat member is pressed on the valve seat, a fluid flowing therebetween is introduced to the primary space.
4. The solenoid on-off valve according to claim 2, wherein the seat member is formed by insert molding in the through hole portion of the main valve body.