摘要:
The invention relates to a tire having a rubber tread comprised of cap/base construction where the tread cap layer provides the running surface of the tread and the tread base layer underlies the tread cap layer and thereby provides a transition between the tread cap layer and the tire carcass. For this invention, the tread cap layer is comprised of a plurality of individual circumferential load-bearing zones of rubber compositions, which exhibit graduated physical properties, and which extend from the outer running surface of the tread cap layer radially inward to said tread base layer. In one aspect, the zoned rubber tread cap layer and rubber tread base layer are co-extruded together to form a unit as an integral tread rubber composite.
摘要:
This invention relates to tires wherein at least a portion of its tire tread containing a running surface is of a rubber composition comprised of a functionalized elastomer, silica reinforcement, particularly precipitated silica aggregates which contain hydroxyl groups (e.g. silanol groups) and a blocked alkoxyorganomercaptosilane coupling agent. The rubber composition may constitute the entire, or major portion of, the running surface of the tread or may be limited to only a longitudinal circumferential strip, or portion, of the running surface of the tread. Such functionalized elastomer is an elastomer which contains functional groups distributed along the polymer chain and/or at its terminal end. Such functional groups may be divided into two categories, namely, a first category which promotes adsorptive interactions with the precipitated silica and a second category which chemically bonds to the precipitated silica. Such functionalized elastomer may contain functional group(s) from either of both of said first and second categories. In addition, said functionalized elastomer may be tin coupled.
摘要:
This invention relates to a dual phase rubber composition and pneumatic tire with a rubber sidewall thereof, namely a dual phased non-black colored rubber composition composed of a first pre-formed elastomer phase comprised of butyl-type rubber and EPDM rubber containing a dispersion therein of reinforcing filler comprised of a particulate amorphous precipitated silica and a second pre-formed elastomer phase comprised of a nanocomposite of natural rubber containing a dispersion therein of exfoliated clay platelets. Said exfoliated clay platelets may be substantially oriented within the tire sidewall in a parallel direction to each and may also be substantially oriented in an annular direction about the axis of the tire. The tire sidewall rubber composition may contain at least one additional elastomer which may be included in either or both of said elastomer phases. Such tire sidewall rubber composition may contain a non-black colorant pigment, such as for example a white colored titanium dioxide pigment. The dual phased tire sidewall rubber composition is prepared by a phase mixing process comprised of pre-blending said butyl-type rubber and EPDM rubber together with said precipitated silica reinforcing filler to form a pre-mix thereof, and thereafter mixing therewith said nanocomposite as a pre-formed blend of natural rubber and exfoliated clay platelets.
摘要:
The present invention relates to a pneumatic tire with a built-in sealant layer having a color other than black. The sealant layer is derived from a sealant precursor layer comprised of a butyl rubber, organoperoxide and silica together with a colorant. The butyl rubber-based precursor sealant layer is built into the tire to form a tire assembly and its butyl rubber component is depolymerized during a subsequent curing of the tire at an elevated temperature in a suitable mold to form the tire having the resultant built-in colored sealant layer. The sealant precursor composition may additionally contain clay and/or calcium carbonate. The sealant layer may also contain a small amount of carbon black so long as the sealant layer is of a color which contrasts with black.
摘要:
This invention relates to a pneumatic tire having a built-in non-black colored sealant layer and its preparation. The sealant layer is derived from a sealant precursor layer comprised of a butyl rubber, organoperoxide, particulate, synthetic amorphous silica and plant-derived organic agricultural seed flour, together with a non-black colored colorant. The butyl rubber-based sealant precursor layer is build into the tire to form a tire assembly and the butyl rubber component of the sealant precursor layer is depolymerized during a subsequent curing of the tire at an elevated temperature in a suitable mold to form the tire having the resultant built-in sealant. The particulate plant derived organic agricultural seed flour is a renewable raw material in a sense that it can be replenished in nature and therefore not as a significant depletion of non-renewable natural resource. The agricultural plant seed flour is comprised of at least a portion of a ground plant seed (e.g. whole or partial seed portion including for example its nucleus and/or shell) of an agricultural seed producing plant such as, for example, wheat, rye, rice, barley, oat, mullet, soybean and/or corn. The sealant layer may also contain one or more of a liquid polyisoprene and short organic fibers. Preferably, the amorphous silica is a precipitated silica, namely aggregates of primary silica particles.
摘要:
The present invention relates to a pneumatic tire with a built-in sealant layer having a color other than black. The sealant layer is derived from a sealant precursor layer comprised of a butyl rubber, organoperoxide and silica together with a colorant. The butyl rubber-based precursor sealant layer is built into the tire to form a tire assembly and its butyl rubber component is depolymerized during a subsequent curing of the tire at an elevated temperature in a suitable mold to form the tire having the resultant built-in colored sealant layer. The sealant precursor composition may additionally contain clay and/or calcium carbonate.
摘要:
The invention relates to a tire having a tread of a rubber composition containing a specialized high vinyl styrene/butadiene copolymer elastomer which contains reinforcing filler as a combination of rubber reinforcing carbon black and synthetic amorphous precipitated silica together with a coupling agent for said precipitated silica as an alkoxyorganomercaposilane having its mercapto moiety blocked which becomes unblocked to enable the mercapto moiety to interact with the specialized high vinyl styrene/butadiene copolymer elastomer. The tread rubber composition may optionally additionally contain an alkylsilane and/or starch/plasticizer composite.
摘要:
Methods, devices, kits and compositions for detecting the presence or absence of one or more helminthic coproantigens in a sample are disclosed herein. The methods, devices, kits and compositions of the present invention may be used to confirm the presence or absence of roundworm, whipworm and/or hookworm in a fecal sample from a mammal and may also be able to distinguish between one or more helminth infections. Confirmation of the presence or absence of roundworm, whipworm and/or hookworm in the mammal may be made, for example, for the purpose of selecting an optimal course of treating the mammal and/or for the purpose of determining whether the mammal has been rid of the infection after treatment has been initiated.
摘要:
A system (10, 20) and method including a wavelength tuning mechanism and a laser path length tuning mechanism for reducing discontinuities in a sweep range. A processor (14) is coupled to a wavelength monitoring device (18) and the tuning mechanisms. The processor analyzes data from the wavelength monitor to adjust the wavelength tuning and cavity length tuning at discontinuities in the wavelength sweep to reduce the discontinuities.
摘要:
Methods, devices, kits and compositions for detecting the presence or absence of roundworm in a mammalian sample are disclosed herein. The methods, devices, kits and compositions of the present invention may be used to confirm the presence or absence of roundworm in a fecal sample from a mammal that may also be infected with one or more of hookworm, whipworm, and heartworm. Confirmation of the presence or absence of roundworm in the mammal may be made, for example, for the purpose of selecting an optimal course of treating the mammal and/or for the purpose of determining whether the mammal has been rid of the infection after treatment has been initiated.