摘要:
The invention relates to a rubber composition and its preparation having a crosslink distribution, particularly at least two types of crosslinks, its preparation, and an article of manufacture, including a tire, having a component of such rubber composition. In one embodiment, such crosslink distribution relates to an inclusion in the rubber composition of an additive to promote the crosslink distribution where the additive itself has a part of the desired crosslink characteristics. The crosslink distribution can be random or in the nature of a gradient change between domains of different crosslinks.
摘要:
The present invention is directed to a copolymer comprising: a polyisoprene backbone chain with a microstructure comprising grater than 98 percent by weight of cis 1,4 linkages; and polymeric sidechains bonded to the backbone chain, the sidechains comprising a polymer derived from a monomer having a hydrogen bond donor site and a hydrogen bond acceptor site.
摘要:
Embodiments of an electronic circuit comprise a module, such as a security module, configured to perform cryptographic processing for a predetermined security protocol that includes random number checking. The security module is controlled by a descriptor that includes instructions that cause the security module to access a generated random number, compare the generated random number to a random number stored during a previous execution of the descriptor, and generate an error signal when the generated random number and the previous execution random number are equal.
摘要:
This invention is based upon the concept of modifying the surface of silica with a metal, such as titanium or zirconium, which will catalyze silanol condensation reactions on the surface of the silica. The utilization of such metalated silica as a filler in rubber compositions results in improved polymer filler interaction and in turn improved physical properties. For instance, such surface metalated siliceous fillers can be used in tire tread compounds to attain improved rolling resistance and treadwear without compromising traction characteristics. The present invention more specifically discloses a tire having a tread comprising (1) a rubbery polymer, (2) a silica coupling agent, and (3) a surface metalated siliceous filler.
摘要:
The present invention discloses an emulsion polymerization process that comprises: (1) preparing an aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; and (2) initiating polymerization of said monomer within the aqueous polymerization medium. The subject invention more specifically reveals an emulsion polymerization process that comprises: (1) preparing a monomer solution which is comprised of (a) at least one monomer, (b) a conjugate acid of a surfactant with a pKa of less than 14, and (c) a controlled free radical polymerization agent; (2) preparing an aqueous medium which is comprised of (a) water, and (b) a conjugate base of a weak acid wherein the pKb of the base is less than 14; and (3) mixing the monomer solution with the aqueous medium under conditions that result in the in-situ formation of an emulsifier, and (4) initiating free radical polymerization.
摘要:
The invention provides a rotary wing aircraft helicopter vehicle rod end and method of making a rod end. The rotary wing aircraft rod end includes a nonelastomeric inner member having an outer bonding surface segment and an axial bore with a center bore axis, a nonelastomeric outer member having an inner bonding surface segment and an axial bore center bore axis, and molded in place alternating elastomeric shims and nonelastomeric shims connecting the nonelastomeric inner member to the nonelastomeric outer member. The rod end includes a first inner elastomeric shim bonded to the nonelastomeric inner member outer bonding surface segment and to a first inner nonelastomeric shim and a second outer elastomeric shim bonded to the nonelastomeric outer member inner bonding surface segment and to a second outer nonelastomeric shim. The nonelastomeric inner member has a molded misalignment rotary wing aircraft rod end orientation with the outer nonelastomeric outer member.
摘要:
A side sealing apparatus for a shrink packaging machine comprising closed loop temperature control of a heater for maintaining an optimum temperature for cutting and sealing two layers of thermoplastic film. The heater comprises a cable or cartridge heater with an internal thermocouple, and it is connected to an automatic temperature controller. The heater is mounted on the side sealer apparatus between two sets of top and bottom V-belts mounted around drive rolls and idler rolls. The V-belts provide nip pressure against the film in order to drive the film. In one embodiment, nip pressure is generated by nip rollers on the scrap side of the film, and by low friction belt support guides on the package side of the film. In another embodiment, the belt support guides are replaced with a series of upper and lower nip rollers, and adjustable toggle clamps provide adjustable pressure on the series of upper and lower nip rollers.
摘要:
Air conditioning system and method in which a refrigerant from a compressor is circulated through a cooling element within a hermetically sealed, thermally insulated cooling compartment, and cooled air from the compartment is delivered to a space to be cooled. In one disclosed embodiment, the cooling compartment is located at the center of a solid cube of insulative material and is heavily insulated from the ambient conditions outside the cube.
摘要:
A portable door lock comprises a jam plate connected through a hinge to a latch plate through a hinge that allows the latch plate to swing from a lock position alongside a door to an unlock position alongside a door jam when the portable door lock is installed in a door jam recess between a door and a door jam so the lock can remain installed yet allow the door to be opened for normal use or locked. A jam plate tongue extends orthogonally from the jam plate adjacent a jam plate hole sized to receive a door latch striker therethrough. Preferably two opposing upper and lower hooks opening in opposite directions swivel on the latch plate on a pivot pin in a plane parallel to the latch plate one hook applicable for a right-hinged door, the other for a left-hinged door. The hooks also may wrap and hook a doorknob shank from above and below. In an alternate embodiment, the hooks may comprise a rigid hook plate with the first and second hooks opening in opposite direction, one useful for left-hinged doors, the other for right-hinged doors.
摘要:
The use of a fabric sheath (2), or other article, on a conduit (1), for example a pipe or flexible hose, to provide abrasion resistance or other forms of protection, for example impact protection or cut-through protection, thereto; and fabric sheaths suitable for such use. A preferred form of circumferentially-heat-shrinkable sheath of woven fabric, capable of use on a conduit, for example to provide impact cushioning and/or abrasion resistance, provides a substantially unobscured outer fabric surface and comprises hoop filaments extending substantially circumferentially around the sheath, at least some of which hoop filaments are heat-shrinkable, and length filaments extending substantially along the sheath, wherein the length filaments are selected either (A) to be sufficiently flexible, at least at temperatures to which they are subjected during heat-shrinking of the sheath in use, for the heat shrinkage of the hoop filaments to crimp the length filaments to an extent (a) producing at least 1%, preferably at least 2%, more preferably at least 5%, longitudinal shrinkage of the sheath in addition to any longitudinal heat shrinkage thereof and/or (b) causing portions of the length filaments either (i) to project outwardly from the shrunken fabric sheath to a maximum distance in excess of the maximum projection distance of the thus-shrunken hoop filaments, or (ii) to increase such excess projection distance if already existing before the heat shrinkage; or (B) to be sufficiently stiff to limit the longitudinal shrinkage due to crimping of the length filaments to less than 10%, preferably less than 5%, more preferably less than 2%, especially less than 1% or substantially zero.