摘要:
This invention relates to a polymerizable phosphazene derivative with a general structural formula.brket open-st.NP(A).sub.a (B).sub.b).brket close-st..sub.xwherein the groups A and B are bonded to phosphorus atoms through --O--, --S--, --NH--, or --NR-- (with R=C.sub.1 -C.sub.6) alkyl), and wherein A stands more precisely for a vinyl ether group or a styrene ether group, and B stands more precisely for a hydrocarbon group. The invention also relates to procedures for synthesizing such phosphazene derivatives. The phosphazenes derivatives of the invention can be cured by a process that is initiated cationically, which leads to a large number of advantages. The phosphazene derivatives of the invention can, in particular, be used as curable binders for paints, coatings, fillers, mastics, adhesives, moldings, or films. Paints or coatings comprising the phosphazene derivatives of the invention show especially high mechanical resistance and scratch resistance.
摘要:
The invention relates to hardenable compositions which contain as the essential constituent, in the non-hardened condition, at least one phosphazene derivative of the general formula [NP--(X--Y--Z).sub.2 ].sub.n, and at least one cross-linking agent with at least two functional groups which are selected among the Z radicals and which can react with the functional Z radicals of the phosphazene derivative is provided, whereinX radicals are from the group --O--, --S--, --NH-- or --NR--, preferably oxygen,Y are aliphatic, cycloaliphatic, aromatic and/or heteroaromatic hydrocarbon groups,Z are functional radicals from the group --OH, --NH.sub.2, --NCO, --COOH, --CHO, --CH.dbd.CH.sub.2, allyl, N-methylol, acrylate, methacrylate, silyl, glycidyl or epoxy or preliminary stages of the radicals from this group or radicals from this group which are blocked by protective groups, preferably acrylate or methacylrate radicals andn is an integer of at least 3 and no more than 10;The NP radicals of the above formula are preferably combined to a phosphazene ring, n being 3 or 4. The phophazene derivatives can be used for the production of hardenable lacquers, coating agents or fillers, knifing fillers, adhesives, preforms or foils.
摘要:
This invention relates to a polymerizable phosphazene derivative with a general structural formula[.brket open-st.NP(A).sub.a (B).sub.b).brket close-st.]xwherein the groups A and B are bonded to phosphorus atoms through --O--, --S--, --NH--, or --NR-- (with R=C.sub.1 -C.sub.6) alkyl), and wherein A stands more precisely for a vinyl ether group or a styrene ether group, and B stands more precisely for a hydrocarbon group. The invention also relates to procedures for synthesizing such phosphazene derivatives. The phosphazenes derivatives of the invention can be cured by a process that is initiated cationically, which leads to a large number of advantages. The phosphazene derivatives of the invention can, in particular, be used as curable binders for paints, coatings, fillers, mastics, adhesives, moldings, or films. Paints or coatings comprising the phosphazene derivatives of the invention show especially high mechanical resistance and scratch resistance.
摘要:
This invention relates to a polymerizable phosphazene derivative with a general structural formula.brket open-st.NP(A).sub.a (B).sub.b).brket close-st..sub.xwherein the groups A and B are bonded to phosphorus atoms through --O--, --S--, --NH--, or --NR-- (with R=C.sub.1 -C.sub.6) alkyl), and wherein A stands more precisely for a vinyl ether group or a styrene ether group, and B stands more precisely for a hydrocarbon group. The invention also relates to procedures for synthesizing such phosphazene derivatives. The phosphazenes derivatives of the invention can be cured by a process that is initiated cationically, which leads to a large number of advantages. The phosphazene derivatives of the invention can, in particular, be used as curable binders for paints, coatings, fillers, mastics, adhesives, moldings, or films. Paints or coatings comprising the phosphazene derivatives of the invention show especially high mechanical resistance and scratch resistance.
摘要:
In a process for monitoring a device for automatically detecting and evaluating surface cracks by means of magnetic powder or the dye penetration process comprising an image pick-up camera and a digital image processing and control unit, a typical defect pattern is projected by means of a projector onto the surface of the article to be examined in the pick-up region of the image pick-up camera and registered, and a defect indication is triggered if the device ceases to operate reliably.
摘要:
A process and device for producing a radiographic image of a body employ a source of high-energy radiation arranged on one side of the body and a pick-up device arranged on the other side of the body, a real-time system for reproducing the radiographic image having a television camera and a screen, and a computer-tomograph to evaluate the radiographic image row-wise and to display a cross-section of the radiographed body on the screen. By means of the real-time radiographic image a cross-section is selected and represented computer-tomographically. In this manner in the real-time radiographic image the location can be determined of which a layer image is necessary in order to recognise defects in the body being radiographed.
摘要:
A process and apparatus for leak-proof sealing of a metallic capsule closed by a stopper and joining the capsule to a metal cable by arc welding, wherein a capacitor is charged, the capsule with a striking tip at one end or the stopper with an ignition point and the cable are clamped at their ends, connected to the terminals of the capacitor, moved together and welded together by discharging of the capacitor with the formation of an arc.