摘要:
Mixtures of catenate and cyclic siloxane oligomers of formula I and II ##STR1## wherein the substituents R consist of 3-methacryloxypropyl or 3-acryloxypropyl groups and methoxy, ethoxy and/or propoxy groups alone or together with C.sub.1 -C.sub.18 alkyl, fluoroalkyl, isoalkyl or cycloalkyl groups and/or C.sub.6 -C.sub.12 aryl groups and where not more than one 3-methacryloxypropyl or 3-acryloxypropyl group is attached to one silicon atom and the degree of oligomerization of compounds of the formula I is within the range 2
摘要:
An aqueous alcoholic fluoroalkyl functional group containing organopolysiloxane-composition, comprising:organopolysiloxanes of formula I:RO�Si(A)(CH.sub.3).sub.z (OR).sub.1-z O!.sub.a �Si(B)(R.sup.2).sub.y (OR).sub.1-y O!.sub.b �Si(C)(CH.sub.3)O!.sub.c �Si(D)(OR)O!.sub.d R.multidot.(HX) (I)wherein A is an aminoalkyl radical derived from the compound of formula II:H.sub.2 N(CH.sub.2).sub.f (NH).sub.g (CH.sub.2).sub.h Si(OR).sub.3-z (CH.sub.3).sub.z (II)wherein 0.ltoreq.f.ltoreq.6, 9=0 if f=0 and g=1 if f>0, 0.ltoreq.h.ltoreq.6 and 0.ltoreq.z.ltoreq.1, and B is a fluoroalkyl radical derived from the compound of formula III:R.sup.1 --Y--(CH.sub.2).sub.2 Si(R.sup.2).sub.y (OR).sub.3-y (III)wherein R.sup.1 is a mono-, oligo- or perfluorinated alkyl group having 1-9 C atoms or a mono-, oligo- or perfluorinated aryl group, Y is a CH.sub.2, O or S group, R.sub.2 is a linear, branched or cyclic alkyl group having 1-8 C atoms or an aryl group and 0.ltoreq.y.ltoreq.1, and C is an alkyl radical derived from the compound of formula IV:R.sup.3 --Si(CH.sub.3)(OR).sub.2 (IV)and D is also an alkyl radical derived from the compound of formula V:R.sup.3 --Si(OR).sub.3 (V)wherein R.sup.3 in the preceding formulae is in each case identical or different, and is a linear, branched or cyclic alkyl group having 1-8 C atoms, R in the preceding formulae is in each case identical or different, and is a linear, branched or cyclic alkyl group having 1-8 C atoms or an aryl group, and HX is an acid, in which X is an inorganic or organic acid radical, and 0.ltoreq.y.ltoreq.1, 0.ltoreq.z.ltoreq.1, a>0, b>0, c.gtoreq.0, d.gtoreq.0, e.gtoreq.0 and (a+b+c+d).gtoreq.2.
摘要翻译:含有有机聚硅氧烷组合物的含水醇氟代烷基官能团包括:式I的有机聚硅氧烷:RO [Si(A)(CH3)z(OR)1-zO] a [Si(B)(R2)y(OR) yO] b [Si(C)(CH3)O] c [Si(D)(OR)O] dRx(HX)(I)其中A是衍生自式II化合物的氨基烷基:H 2 N(CH 2)f (NH)g(CH 2)h Si(OR)3-z(CH 3)z(II)其中0 0,则g = R =(Y) - (CH 2)2 Si(R 2)y(OR)3-y (III)其中R1是具有1-9个C原子的单,低聚或全氟烷基或单,低聚或全氟化的芳基,Y是CH 2,O或S基团,R 2是直链,支链 或具有1-8个碳原子或芳基且0≤y≤1的环状烷基,C是衍生自式IV化合物的烷基:R3-Si(CH3)(OR)2( IV),D也是衍生自式V化合物的烷基:R3-Si(OR)3(V)其中前述通式中的R 3在每种情况下均为 或具有1-8个C原子的直链,支链或环状烷基,前述式中的R各自相同或不同,为具有1-8个C原子的直链,支链或环状烷基 或芳基,并且HX是酸,其中X是无机或有机酸基团,并且0≤y≤1,0≤z≤1,a> 0,b> 0 ,c> / = 0,d> / = 0,e> / = 0和(a + b + c + d)> / = 2。
摘要:
A method of magneto optic imaging to locate the presence of a crack around a circular drilled bolt hole wherein the circular bolt hole, because of its sharp corners, locally disturbs the magnetic field used to form the image and obscures the presence of a crack therearound. Initially, a magneto optic image is formed of the drilled circular bolt hole under test, wherein a crack near the circular hole will perturb the circularity of the hole image by driving the magnetic field away from the circumference of the circular hole to cause it to appear out of round and eccentric. A pattern recognition analysis is then applied to the image to check the image for circular shapes, wherein each circular shape image is correlated with a circle of similar diameter to check the circularity of the image, and an eccentricity of the circular image shape is indicative of a crack around the drilled circular bolt hole. In greater detail, a computer program, in a bit by bit comparison, looks for differences in the diameter of the hole image which can be related to eccentricity, which is characteristic of a crack around the circular hole.
摘要:
3-Acryloyloxypropylalkoxysilanes of formula I:CH.sub.2 .dbd.C(R)C(O)O(CH.sub.2).sub.3 Si(R.sup.1).sub.a (OR.sup.2).sub.3-a (I)are prepared by reacting a hydridosilane of formula II:HSi(R.sup.1).sub.a (OR.sup.2).sub.3-a (II)with an allyl ester of formula III:CH.sub.2 .dbd.C(R)C(O)OCH.sub.2 CH.dbd.CH.sub.2 (III),where R is a hydrogen atom or a methyl group, R.sup.1 and R.sup.2 are each C.sub.1 to C.sub.6 alkyl groups or phenyl groups, and a is 0, 1 or 2, in the presence of a platinum catalyst.
摘要:
A method of magneto-optic eddy current imaging for detecting defects in a ferrous metal, non-ferrous metal, or non-metallic structure test object uses a sensor, magnetic field system, optical system, a video camera and a display. The method includes canceling undesired background of a two-dimensional magneto-optically generated image of a defect in the test object by dithering the image and processing signals from the video camera in compatibility with the dithering. The image is dithered once per frame of the camera, or at a sub-multiple of the frame of the camera, and the dithering may be accomplished manually or mechanically.
摘要:
A respiration system includes a pressure regulator including a housing, an inlet for connection to a pressurized gas comprising oxygen, and a first data communication system, and a respiration facepiece including an interface to which the pressure regulator is removably attachable, at least one seal system to form a sealing engagement with the face of a user to encompass the nose and mouth of a wearer; an inspiration port in fluid connection with the pressure regulator interface and in fluid connection with the interior of the facepiece and at least one display within a volume of sealing engagement with the face of the user that is within the field of view of the user. The pressure regulator interface includes a second data communication system to receive data from the first data communication system to control the at least one display. A sealing attachment may, for example, be formed between the pressure regulator and the interface of the facepiece.
摘要:
A locking element for a dispenser for discharging a medium, with an insert body, which has an outlet channel and an exit opening for the medium to be discharged, and a piston element which has a piston head co-operating with a piston seat and at least one elastic resilient leg, characterized in that a sealing element is arranged in the outlet channel, which forms the piston seat, and the piston element with the at least one resilient leg is arranged in an enlarging channel portion of the outlet channel, wherein the piston head is pre-tensioned against the piston seat and is pushed out of the piston seat by the exiting medium.
摘要:
Plants are engineered to express HIV related surface protein genes. The plants can be used as a source of the protein for a variety of purposes. Plant tissue can be orally administered to animals to elicit an immune response or provide protection from viral infection. The protein can be extracted and delivered to animals. Plant produced proteins can also provide a less expensive and more readily available source of the protein as reagents or in other experimentation involving HIV and SIV proteins.
摘要:
Valve arrangement for a pressurized fluid container, consisting of a valve disc which may be sealingly connected to the fluid container, a valve body made of plastics which may be secured in an opening of the valve disc, a valve piston made of plastics which is guided in a through-channel of the valve body and cooperates with a sealing surface of the valve body and a spring arrangement cooperating with the valve body, which presses the valve piston against the sealing surface of the valve body, the valve body comprising a neck defining the through-channel and at least one collar segment, an annular groove being formed between the neck and the at least one collar segment, and into the annular groove a press ring being introduced, of which the thickness in the radial direction is such that the at least one collar segment is pressed in a spread-apart manner against the opening of the valve disc.
摘要:
The invention relates to an arrangement of contact areas and test areas on patterned semiconductor chips. The contact areas and the test areas are electrically connected to one another via a conduction web. Whereas the contact areas are arranged in a first region, which has no components of an integrated circuit, the test areas lie in a second region of the top side of the semiconductor chip, which region has components of an integrated circuit.