摘要:
A transparent ocular lens material comprising a condensation polymer prepared by the condensation polymerization of a monomer mixture comprising (A) an aromatic tetracarboxylic acid dianhydride and (B) at least one diamino compound selected from (a) a silicon-containing diamine, (b) a diamino-substituted benzene and (c) a diamino-substituted diphenyl. The ocular lens material is excellent in transparency, having high oxygen permeability and moreover, excellent in heat resistance, ultraviolet-ray absorbing property and forming and processing property. Therefore, the ocular lens material can be suitably used in contact lenses, intraocular lenses, and the like.
摘要:
A vinyl copolymer is provided comprising a silanol group-containing (meth)acryl siloxane unit of formula (1): ##STR1## wherein R.sup.1 is hydrogen or methyl, R.sup.2, R.sup.3, and R.sup.4 are independently a monovalent C.sub.1 -C.sub.8 hydrocarbon group or a siloxy group, R.sup.5 is a monovalent C.sub.1 -C.sub.8 hydrocarbon group, n=1 to 12, and a=0 or 1. The vinyl copolymer is prepared by copolymerizing a polymerizable vinyl monomer with a silanol group-containing (meth)acryl siloxane in the presence of a radical initiator or by emulsion polymerizing a polymerizable vinyl monomer with a silanol group-containing (meth)acryl siloxane in an aqueous medium in the presence of a surfactant and a polymerization initiator. The copolymer is blended with a condensation catalyst to form a room temperature curable resin composition which crosslinks in the presence of moisture into a cured coating having weatherability, flexibility, and adherence.
摘要:
Organic silicon compounds which are expressed by the general chemical formulae (I) or (II): ##STR1## wherein R.sup.1 is a monovalent organic group with 1 to 8 carbon atoms; R.sup.2, R.sup.3 and R.sup.4 in each equation are independent and either a monovalent organic group with 1 to 8 carbon atoms or a siloxyl group expressed by ##STR2## wherein R.sup.5, R.sup.6 and R.sup.7 are independent in each equation and they are a monovalent organic group with 1 to 8 carbon atoms; and a is either 0, 1 or 2. The novel organic silicon compounds possess both a polymerizable double bond and organopolysiloxane within the same molecule. These compounds are superior in their polymerizability and copolymerizability and are useful as polymer reforming agents.
摘要:
Door mounted extendable protectors for protection against damage from bumping by an opening door of another vehicle parked closely adjacent in side by side relation. Resilient bumper elements are mounted outside each car door extended substantially the front to back length of the door. The door extending mechanism is connected via bumper element mounting rods that extend from connection to the extending mechanism out through the outer sheet metal skin of the door to connection with the bumper element. In one embodiment the door bumper extending mechanism is also a retracting mechanism while in another embodiment the bumper element must be manually returned to the retracted state flush against the door when the extending mechanism is not activated.
摘要:
An addition curing silicone rubber composition and a cured product thereof are provided. In this composition, amount of the low molecular weight siloxane component volatilizing from the cured product has been reduced, and as a consequence, this composition is free from the problems such as clouding or haze, contact fault, adhesion failure, and hydrophobicization of the surface caused by the deposition of the volatilized low-molecular weight siloxane component on the surrounding surfaces. More specifically, the addition curing silicone rubber composition comprises; (A) 100 parts by weight of a polyorganosiloxane containing, on average, at least two alkenyl groups which are bonded to silicon atom; (B) 0.3 to 20 parts by weight of an organohydrogenpolysiloxane containing at least two hydrogen atoms which are bonded to silicon atom (SiH functional groups) per molecule; and (C) a catalytic amount of a addition reaction catalyst, and content of the polyorganosiloxane having a degree of polymerization of up to 10 and containing at least one SiH functional group per molecule is up to 0.5% by weight in relation to the entire composition.
摘要:
A slit 9 having a predetermined length is formed in a mirror 8 and an illumination light L of illumination part 10 irradiates an observation area E in a manner of zero-angle illumination to an optical axis K. The illumination part is movable to form an oblique path of the illumination light L which passes through the slit 9. A shadow appears due to the oblique path of the illumination light L and it facilitates a stereoscopic observation.
摘要:
An image processing apparatus includes a motion-blur adding mechanism performing filter processing on moving image data to be subjected to coding processing in accordance with motion information indicating motion of an image between unit images included in the moving image data as pre-processing of the coding processing so that motion-blur addition processing is performed.
摘要:
A light diffusing silicone rubber composition is provided comprising a silicone rubber compound having an overall transmittance of at least 70% when measured in a cured sheet of 2 mm thick, and a light diffusing agent added and dispersed in the silicone rubber compound. The light diffusing agent is in the form of poly(meth)acrylate resin, polystyrene resin or (meth)acrylate-styrene copolymer microparticulates having an average particle size of 0.3-100 μm.
摘要:
The present invention provides methods for labeling One or two oxygen atom(s) in a carboxyl group of a carboxyl-containing compound with an oxygen isotope selected from oxygen-17 (17O) or oxygen-18 (18O). The methods of the present invention are characterized in that an activated ester of the carboxyl-containing compound (carboxylic acid) is reacted with H217O or H218O in the presence of an activator. In the methods of the present invention, the reaction between the activated ester of a carboxylic acid and H217O or H218O can be allowed to proceed without including drastic conditions such as strongly acidic conditions or alkaline hydrolysis because an activator is used.
摘要:
A wiring substrate (1) comprises an insulating base (10) with connection holes (11), buried conductors (12) provided in the connection holes (11) without reaching a rear surface of the insulating base (10), and wiring layers 14 connected to the buried conductors (12). The buried conductors (12) thicken the wiring layers (14), and can form aligning parts (110) on the rear surface of the connection holes (11) to be used for three-dimensional mounting structure. Each wiring layer (14) includes thin terminals (14A), wirings (14B) and thick electrodes (14C). Not only the terminals (14A) and wirings (14B) but also the buried conductors (12) are raised by the same manufacturing process. A semiconductor element (2) is attached to the electrodes (14C) of the wiring substrate (1).