摘要:
The present invention relates to the use of thermosetting polyurethane urea reactive adhesive compositions which are stable at ambient temperature but rapidly set at higher temperatures, wherein the adhesive comprises stabilized finely-divided polyisocyanates of retarded reactivity of which 0.1 to 25% of the NCO-groups are surface-modified and higher and/or lower molecular polyamines (optionally with polyols as additional reactive components). An important feature of these thermosetting reactive adhesive compositions is their capacity for storage at ambient temperature and their spontaneous increase in viscosity at relatively low heating temperatures which prevents the adhesive from running off during the heating period when applied to vertical surfaces.
摘要:
Aromatic uret dione diurea diamines corresponding to the formula ##STR1## in which X, Y, m and n are as defined herein are produced by reacting an aromatic diamine with a diisocyanate corresponding to a specified formula in a molar ratio of diamine to diisocyanate of at least 1.8 to 1. These diamines are particularly useful in the production of elastomers.
摘要:
The present invention is directed to a process for the production of a polyurethane urea elastomer which comprises preparing a heterogeneous mixture of(a) a diaminodiphenylurea corresponding to the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, represent hydrogen or a C.sub.1 -C.sub.6 alkyl radical and wherein the amino groups are in the meta and/or para position to the urea group and(b) polyisocyanates and NH.sub.2 -or OH-groups containing compounds or a NCO-terminated prepolymer prepared from a polyisocyanate and a polyhydroxyl compound having a molecular weight of 400 to about 10,000, and subsequently reacting the heterogeneous system to form a polyurethane urea elastomer by heating the mixture to a temperature below the melting point of said diaminodiphenylurea.The present invention is also directed to heterogeneous reaction mixtures based on the above diaminodiphenylureas suspended in the above NCO-terminated prepolymers.
摘要:
The present invention is directed to a polyurethane-based reactive adhesive comprising A) at least one polyisocyanate, B) at least one polyol, and C) at least one polyamine C which is a polyether amine containing at least two amino groups, at least one phenyl group and recurring polyoxyalkylene units.
摘要:
A knee joint bandage made of elastic textile material having a profiled insert encompassing the kneecap in a recess, the insert being covered by an overlay fastened to the textile material. Within the profile insert is a flexible, non-expandable tensioning member for connecting the regions of the kneecap poles on the fibula side in an arc around the kneecap wherein the distance between these regions increases during bending of the knee joint, the distance of the arc from the connecting line of the knee poles in decreased, and the tensioning member presses on the adjacent side of the kneecap, displacing the same medially and centering it. The bandage is provided with a flexible tensioning band, which partially covers the kneecap in its peripheral area relative to the tensioning member, the tensioning band substantially extends in the direction between the kneecap poles such that it counteracts a lifting of the kneecap.
摘要:
Knee-joint bandage of elastic textile material, said knee-joint bandage being provided with a specially shaped insert surrounding the kneecap in a cutout, said specially shaped insert being covered by an overlay of identical or similar textile material attached to said textile material, the specially shaped insert being associated with a flexible, non-expandable tensioning member, said tensioning member connecting the regions of the kneecap poles on the fibula side in an arc around the kneecap such that, when the distance between said regions increases during bending of the knee joint, the distance of the arc from the connecting line between the kneecap poles is reduced and the tensioning member presses on the adjacent side of the kneecap, medially displacing and centering the latter, wherein the tensioning member is attached to the overlay in such a manner that, during bending of the knee joint and stretching of the overlay, the tensioning member displaces the kneecap.
摘要:
An ankle-joint orthosis which comprises a U-shaped supporting yoke consisting of flexible material, the arms of which meet in a web below the foot, extend above the malleoli and are held together in their end region by a fastening strap wrapping round the leg. The outer arm is taken upwards at the side in front of its malleolus and the inner arm is taken up opposite the outer arm, in front of the Achilles tendon. The arms are taken towards the web as far as a position in front of the heel and extend upwards towards their ends in such a manner that they rise upwards laterally beside the edges of the shinbone, substantially parallel to these. Fitted in the lower region of the arms is a supporting strap, particularly a self-gripping strap, which extends from the one arm, over the instep obliquely upwards to the other arm on which it can be fixed, engages round the Achilles tendon above the malleolus and, crossing over itself on the instep, ends in a holding member on the other arm.
摘要:
A medical aid for supporting the function of the knee joint, in particular a knee joint orthosis with a pad engaging around the patella of the knee joint. An improved patellar pad has the additional function of supporting movement and has additional preventive/therapeutic functions.
摘要:
The invention relates to an ankle orthosis comprising a U-shaped support stirrup made of a flexible material, the sides of which stirrup converge beneath the foot in a web projecting as a tab toward the metatarsus, extend past the bones, and are held together at their end regions by a fastening strap wrapping around the leg. The tab has a convexity, which presses against the cuboid bone of the foot due to a preloading of the tab.
摘要:
A tubular compression bandage of elastic textile material includes a plurality of tightening straps adjacently encompassing the bandage. The tightening straps are fastened by their starting portions to a starting longitudinal strip connected to the outer surface of the bandage and are guided circumferentially in pairs at an oblique angle of up to 30° with respect to the longitudinal direction of the bandage to their terminating portions of the side opposite the starting longitudinal strip to pairs of securing eyes arranged in herringbone-like manner and are folded back therein to form Velcro™ fasteners on the bandage, the degree of oblique guiding being adjustable through selectble fixing of the starting and/or terminating portions of the tightening straps in the longitudinal direction of the bandage.