Abstract:
This invention provides an adhesive composition which comprises 1 part by weight of (a) a compound of the general formula: ##STR1## wherein R.sub.1 represents H, a hydrocarbon group of 1-6 carbon atoms optionally containing halogen, COOR', wherein R' represents a hydrocarbon group of 1-20 carbon atoms optionally containing halogen or halogen;R.sub.2 is as defined for R.sub.1 ;R.sub.3 represents H, a hydrocarbon group of 1-6 carbon atoms optionally containing halogen, halogen or CN;R.sub.4 represents (COX.sub.2).sub.m1 (CO).sub.m2 (ZCO).sub.m3 (Z).sub.m4 Ra wherein Ra represents an organic residue of 6-60 carbon atoms and a valency of m+n ; m1, m2, m3 and m4 each represents an integer of 0-4 and satisfies m1+m2+m3+m4.ltoreq.m; X.sub.2 represents O, S or NRb, (wherein Rb represents H or alkyl of 1-4 carbon atoms and Z represents O or S;X.sub.1 is as defined for X.sub.2 ;m is an integer of 1-4;n is an integer of 2-6; andk is 0 or 1,and 0-199 parts by weight of (b) a vinyl monomer copolymerizable with the aforesaid compound. Such an adhesive composition can strongly adhere to any of the hard tissues of the living body, such as teeth and bones, metal materials, organic polymer materials and ceramic materials, and, in particular, has an advantage in that it can maintain high adhesive strength for a long time under wet conditions. While the adhesive composition of this invention may be used in various fields, it is especially useful in the dentistry field.
Abstract:
A varnish for the formation of a coating layer on a tooth surface to protect healthy tooth surface against the erosion by an acid etching solution during tooth restoration which comprises a polymer comprising vinyl chloride and vinyl acetate as the main monomer units dissolved in a dentally acceptable solvent.
Abstract:
A cement composition which comprises a filler, a binder to be used in admixture with the filler, and a curing agent for polymerizing the binder, which is characterized by that the binder comprises, based on the total weight of the binder, 20-100% by weight of (A) a free-radical polymerizable monomer of the following formula: ##STR1## wherein R is a hydrogen atom or a methyl group and X is an organic residue having 1-48 carbon atoms, and 0-80% by weight of (B) a mono-, di- or tri-functional free-radical polymerizable monomer which is copolymerizable with the above monomer (A) is disclosed. By using the above binder, the filler is firmly bonded with each other and gives a cured product having high compressive strength and abrasion resistance. The cement composition is especially useful as dental restorative materials.
Abstract:
A printer includes a first feeder that feeds a first sheet, a second feeder that feeds a second sheet, a feed position on the second feeder being set so that the second sheet overlaps the first sheet when the second sheet is ejected, a stacker that collects the first sheet and the second sheet on which printing has been carried out so that the first sheet and the second sheet overlap, and a processor that determines whether a sectioning command is included in a print request, and when a sectioning command is included, switches over between the first feeder and the second feeder for each print job.
Abstract:
A printing device includes a head unit having a print head and a sensor that detects a presence or an absence of a sheet, a drive unit that causes the head unit to move to a width direction orthogonal to a feeding direction of the sheet, and a control unit controlling a position of the print head to the sheet based on a detection result of the sensor, wherein the control unit executes a first control that obtains the detection result of the sensor whenever the head unit moves only a first interval to a specific direction from a reference position and a second control that, when a change from the presence to the absence of the sheet is detected by the sensor during the first control, obtains the detection result of the sensor whenever the head unit moves only a second interval that is shorter than the first interval.
Abstract:
A dental polymerizable composition comprising (a) a fluorine compound comprising a chain polymer having a main chain comprising a monomer unit having a hydrophilic group, and terminal groups comprising a fluoroalkyl group at each of both ends of the main chain; (b) a polymerizable monomer; and (c) a polymerization initiator. The dental polymerizable composition can be suitably used, for example, for dental composite resins, such as dental composite filler materials, crowning materials, and bonding materials; dental adhesive agents, such as teeth-straightening adhesive agents, cavity-coating adhesive agents, and tooth fissure sealing materials; denture base materials, denture base mucosal adjusting materials, fissure sealants, coating agents applied to tooth surface or dental prosthetic, surface glazes, and the like, and especially for various coating applications, for example, a fissure sealant, a coating agent to tooth surface or dental prosthetic, surface stains or a surface glaze, a hypersensitive inhibitor, a dental manicure, or the like.
Abstract:
Purpose of the invention—The purpose of the invention is to provide a porous polyolefin membrane consistent with a simple composition that may be characterized by a small pore diameter and a high porosity by simplifying the manufacturing process to facilitate uniform dispersion of the components. Means to achieve the purpose—A porous polyolefin membrane is formed by melting and kneading a specific resin (C) which composition containing a polyolefin resin consisting of a crystalline polypropylene (A) and a propylene-α-olefin copolymer (B), dispersed in said crystalline polypropylene (A), to obtain a film-shaped melt, and forming a membrane from the said melt with specific conditions, followed by stretching of said membrane at least in one direction, which contains continuous pores in the region consisting of said copolymer (B).
Abstract:
A fitting composition capable of fitting a body-worn tool to be used in contact with skin, such as spectacles, a hearing aid, and an artificial limb, suitably to the body shape of individual wearer and thereby realizing the function of the body-worn tool in a steady state, as well as providing an excellent wear-feeling, a body-worn tool produced using the same, and a method of producing the same. The fitting composition for body-worn tools to be used in contact with skin including (a) a thermoplastic block copolymer having at least one polymer block (A) mainly composed of an aromatic vinyl compound and at least one elastic polymer block (B); (b) a (meth)acrylic monomer; and (c) a polymerization initiator.
Abstract:
In a consecutive image processing system for smoothly and consecutively processing image data when transferring and displaying the image data stored in image memories and display memories, the system comprises: a host computer; an image control apparatus having at least a plurality of image memories divided into a plurality of memory areas for storing image frames having a display order, the display order being applied in such a manner that it is possible to perform a display based on either a memory switch or address switch, and a first microprocessor unit for commanding an enlargement rate, a memory transfer, and a display start based on a command from the host computer; and an image display apparatus having at least a plurality of display memories each divided into a plurality of memory areas corresponding to the image memory for storing image frames to be displayed, each image frame having a display order corresponding to the image memory, and a second microprocessor unit for commanding a memory switch and a start address of an enlarged image under an enlargement rate based on a command from the first microprocessor unit.
Abstract:
This invention relates to two-pack type dental lining compositions comprising (a) a solution of a polymer having at least 10 mole % of a carboxyl-containing vinyl monomer, and (b) a solution of a zirconium chelate compound represented by the following general formula ##STR1## (wherein R.sub.1 denotes --CH.sub.3, --OCH.sub.3 or --OCH.sub.2 CH.sub.3, R.sub.2 stands for an alkoxy of 2 to 10 carbon atoms, and n is an integer from 2 to 4).