The present invention provides a dental cement showing excellent storage stability, undergoing little change in paste properties during long-term storage, and having a small solidification risk during long-term storage. The present invention relates to a multi-part dental cement comprising: a first paste comprising an acid group-containing (meth)acrylic polymerizable monomer (a), a polyfunctional (meth)acrylic polymerizable monomer (b) containing no acid group, an oxidizing agent (c-1) of a chemical polymerization initiator, and a filler (d); and a second paste comprising a polyfunctional (meth)acrylic polymerizable monomer (b) containing no acid group, a reducing agent (c-2) of a chemical polymerization initiator, and a filler (e), wherein the filler (d) is treated with a surface treatment agent and has an average particle diameter of 0.01 to 50.0 μm, the surface treatment agent comprises a silane coupling agent (A) represented by the general formula (1) and an organosilazane (B) represented by the general formula (2).
The present invention provides a self-adhesive dental composite resin maintaining mechanical strength, showing excellent storage stability, undergoing little change in transparency and properties of the paste during long-term storage, and having a small solidification risk during long-term storage. The present invention relates to a self-adhesive dental composite resin comprising: an acid group-containing (meth)acrylic polymerizable monomer (a); a polyfunctional (meth)acrylic polymerizable monomer (b) containing no acid group; a photopolymerization initiator (c); and a filler (d), wherein the filler (d) is treated with a surface treatment agent and has an average particle diameter of 0.01 to 50.0 μm, the surface treatment agent comprises a silane coupling agent (A) represented by the following general formula (1):
CH
2
═C(R
1
)—COO—(CH
2
)
p
—Si—R
2
q
R
3
(3-q)
(1), and
an organosilazane (B) represented by the following general formula (2):
R
4
R
5
R
6
—Si—NH—Si—R
7
R
8
R
9
(2).
An olefin polymerization catalyst and a process for preparing olefin polymer
申请人:MITSUI PETROCHEMICAL INDUSTRIES, LTD.
公开号:EP0754698A2
公开(公告)日:1997-01-22
An olefin polymerization catalyst comprising:
(A-1) a Group IVB transition metal compound of formula (I), and
(B) (B-1) an organoaluminum oxy-compound, and/or
(B-2) a compound which reacts with the transition metal compound (A-1) to form an ion pair,
wherein, inter alia, at least one R1 is aryl, arylalkyl, arylalkenyl or alkylaryl or two R1s form a ring.
The invention relates to 4-phenyl-pyrimidine-2-carbonitrile derivatives having the general formula (I) or a pharmaceutically acceptable salt thereof. The invention also relates to pharmaceutical compositions comprising said derivatives as well as to the use thereof in the preparation of a medicament suitable for the treatment of osteoporosis, atherosclerosis, inflammation and immune disorders, such as rheumatoid arthritis, and chronic pain, such as neuropathic pain.
PHASE TRANSFER CATALYST FOR SYNTHESIS OF PENTAERYTHRITOL DIPHOSPHITES
申请人:Stevenson Donald
公开号:US20110021839A1
公开(公告)日:2011-01-27
The present invention pertains to a process for the preparation of pentaerythritol diphosphites via a one-pot, direct esterification of phosphorus trichloride with pentaerithritol, and either an alkylphenol or an arylalkylphenol which functions both as a reactant and as a solvent, with a phase transfer catalyst such as a quaternary ammonium salt.