Abstract:
A telecommunications connector includes first and second pairs of electrical conductors. The first and second pairs of conductors are arranged in one region of the connector such that one conductor of the first pair is selectively positioned to be closer to both of the conductors of the second pair than is the other conductor of the first pair, and such that the one conductor of the first pair couples a common mode signal of a first polarity onto the conductors of the second pair. In another region of the connector the other conductor of the first pair is selectively positioned to be closer to both of the conductors of the second pair to asymmetrically couple a common mode signal of a second polarity onto the conductors of the second pair.
Abstract:
The invention relates to certain urethanes or polyurethanes that are decomposed by heating in the range 100.degree.-200.degree. C to give reactive amines or polyamines that are useful for curing epoxy resins, polyisocyanates, polyacids, polyanhydrides, polyketones, polyhalides and others in a relatively short curing period, less than 2 hours and usually less than 10 minutes. These cured resins are useful as adhesives, sealants, coatings, etc. These latent amine groups may be part of a one component system comprising a self-curing epoxy-urethane resin curable by heating.
Abstract:
A lightweight strong cast for the repair of broken bones is made by impregnating a fibrous felt with a photocurable resin, wrapping the felt in bandage form around the injured member until a sufficient thickness is built up, then curing the resin by exposing the wrapped ''''cast'''' to actinic radiation for a time sufficient to convert the impregnated wrapping into a rigid substance.
Abstract:
A thermosetting resin composition consisting essentially of a solid epoxy resin having a molecular weight in the range 1,000-4,000, 1-15% by weight of the epoxy resin of a curing agent therefor and 0.5 to 3.0% by weight of the composition of a flow control agent consisting essentially of liquid poly(ethyl acrylate) having a number average molecular weight in the range 5,000 to 15,000. The composition when melt compounded and milled to an average particle size diameter of 2-20 microns can be electrostatically deposited onto metallic surfaces such as can interiors to produce an ultra thin (0.3-1.0 mil thick) protective coating on curing.
Abstract:
A thermosetting resin composition consisting essentially of a solid epoxy resin having a molecular weight in the range 1,000-4,000, 1-15% by weight of the epoxy resin of a curing agent therefor and 0.5 to 3.0% by weight of the composition of a flow control agent consisting essentially of liquid poly(ethyl acrylate) having a number average molecular weight in the range 5,000 to 15,000. The composition when melt compounded and milled to an average particle size diameter of 2-20 microns can be electrostatically deposited onto metallic surfaces such as can interiors to produce an ultra thin (0.3-1.0 mil thick) protective coating on curing.
Abstract:
A telecommunications connector includes first and second pairs of electrical conductors. The first and second pairs of conductors are arranged in one region of the connector such that one conductor of the first pair is selectively positioned to be closer to both of the conductors of the second pair than is the other conductor of the first pair, and such that the one conductor of the first pair couples a common mode signal of a first polarity onto the conductors of the second pair. In another region of the connector the other conductor of the first pair is selectively positioned to be closer to both of the conductors of the second pair to asymmetrically couple a common mode signal of a second polarity onto the conductors of the second pair.
Abstract:
A polar unsaturated polyester is photocured by irradiating (ultraviolet radiation) an admixture of a polythiol, an unsaturated polyester, and a photocuring rate accelerator. The unsaturated polyester is prepared by reacting mono- or polycarboxylic acids with mono- or polyhydric alcohols. The double bonds are furnished by any of these components. At least one of the double bonds is situated internally to the main backbone chain of the polyester. The photocure is achieved by the addition of the sulfhydryl groups of the polythiol to the reactive double bonds of the polyester.