摘要:
A modified dimethylacrylate monomer is represented by the following formula (I): wherein R11 and R12 independently represent a C1 to C3 alkylene group or a phenylene group; X1 and X2 independently represent NHCO, CO, or a single bond; Y1 and Y2 independently represent a C1-C10 alkylene group or a single bond; and Z1 and Z2 independently represent SiA1A2A3 or H, with the proviso that, Z1 and Z2 cannot be H at the same time. A method for preparing the modified dimethylacrylate monomer and a polymeric dental composite are also disclosed.
摘要:
An electronic connector for electrically connecting an electronic module to a printed circuit board including a casing having crimped metal guide posts inserted into holes on the printed circuit board and a channel to receive the module to be connected, and pairs of first contacts and pairs of second contacts alternatively inserted in holes on the casing to hold down the module and electrically connect it to the printed circuit board, wherein each contact of the pairs of first contacts and the pairs of second contacts has an upper part bent outwards, and then extended downwards at a length stopped against an inside surface of the casing; a separating wall is formed between each two adjacent contacts and projects from the lowermost edge of the casing to separate the contacts.
摘要:
The present invention provides a method for producing a silicone hydrogel having a high water content. The method comprises the following steps: (a) polymerizing a monomer mixture to form the silicone hydrogel, wherein the monomer mixture comprises at least one silicon-containing monomer and at least one ionic monomer; and (b) placing the silicone hydrogel in an alkaline solution for at least 20 minutes, wherein the alkaline solution has a pH not less than 7.5 and the ionic monomer is present in an amount not less than 0.7 wt % based on the total dry weight of the silicone hydrogel.
摘要:
A contact lens-treating solution contains polyelectrolyte complex particulates and an aqueous solution for dispersing the polyelectrolyte complex particulates. Each of the polyelectrolyte complex particulates is formed of a cationic polymer and an anionic polymer. The aqueous solution contains water and an additive including a surfactant, an antibacterial agent, a cleaning agent, a thickening agent, a chelating agent, and combinations thereof for cleaning or maintaining the contact lens. A method for treating a contact lens using a contact lens-treating solution containing water and polyelectrolyte complex particulates is also disclosed.
摘要:
A teeth-whitening gel is provided. The main ingredient of the teeth-whitening gel comprises a polypeptide having halamine (N—X bond, X═Cl, Br or I) groups and a high molecular weight. By the redox properties of halamine group, the gel contacting with the teeth's surface can bleach and whiten the teeth.
摘要:
A teeth-whitening gel is provided. The main ingredient of the teeth-whitening gel comprises a polypeptide having halamine (N—X bond, X═Cl, Br or I) groups and a high molecular weight. By the redox properties of halamine group, the gel contacting with the teeth's surface can bleach and whiten the teeth.
摘要:
The present invention provides a dental etching gel composition including phosphoric acid in aqueous solution form, a viscosity-enhancing agent and optionally additives, in which the viscosity-enhancing agent is carboxymethyl cellulose (CMC) with the following properties: (a) having a viscosity of about 100 to about 2000 cps when formulated as an aqueous solution containing 1 wt % of CMC; and (b) having an average degree of substitution of sodium salts in molecular formula of about 21% to about 33%. The dental etching gel composition of the present invention can be used to pre-treat the surface of teeth prior to repair or filling. The etching gel formed by combining phosphoric acid in aqueous solution form with CMC viscosity-enhancing agent having the specific properties stated above is less fluid and thus can be used to etch the specific surface of the tooth so as to obtain a rough surface which improves the close adhesion between teeth and filling resins in the subsequent repairing or filling process.
摘要:
An electrical connector includes at least a pair of metal latches inserted in two opposite end portions of the connector, each metal latch having an embedding root portion formed on a lower portion of the latch insertably fixed in each end portion of the connector so that a daughter printed circuit board may be resiliently clamped between the two metal latches fixed on the connector to be electrically connected with a mother printed circuit board secured under the electrical connector.