Abstract: A process for producing scratch-resistant coatings, especially scratch-resistant multicoat finishes, involving use of coating compositions which

Abstract: The present invention relates to a process for producing coated substrates, especially coated automobile bodies, coils and furniture, in which first of all a powder slurry clearcoat material and then a sol-gel clearcoat material are applied to an optionally precoated substrate and are then cured conjointly.

Abstract: A process for producing scratch-resistant coatings, especially scratch-resistant multicoat finishes, involving use of coating compositions which, after curing, have a storage modulus E′ in the rubber-elastic range of at least 107.5 Pa and a loss factor tan&dgr; at 20° C. of at least 0.05, the storage modulus E′ and the loss factor having been measured by dynamic mechanical thermoanalysis on free films having a film thickness of 40±10 &mgr;m, and comprise as binders one or more polyacrylate resins having a hydroxyl number of from 100 to 240, an acid number of from 0 to 35, and a number-average molecular weight of from 1500 to 10,000, and as crosslinkers one or more free or blocked isocyanates and/or triazine-based components which crosslink with the hydroxyl groups of the binder to form ether and/or ester structures.

Abstract: The present invention relates to a process for producing scratch-resistant coatings which comprises applying a coating composition which in the cured state has a storage modulus E′ in the rubber-elastic range of at least 107.6 Pa and a loss factor tan &dgr; at 20° C. of not more than 0.10, the storage modulus E′0 and the loss factor having been measured by dynamic mechanical thermoanalysis on homogeneous free films having a film thickness of 40±10 &mgr;m. The present invention additionally relates to the use of the process for producing multicoat finishes and also to coating compositions suitable for this process.

Abstract: The invention relates to a belt buckle tensioner comprising a belt buckle unit provided with a belt buckle and a traction transfer device and further comprising a tensioner drive. The traction transfer device connects the belt buckle with the tensioner drive and displaces the belt buckle in a tensioning direction on activation of the tensioner drive. There is further provided at least one positive connection between the belt buckle unit and the tensioner drive, which in the non-activated state of the tensioner drive largely prevents at least one of a rotation and an axial displacement of the belt buckle unit with respect to the tensioner drive.

Abstract: A belt tensioner, in particular a buckle tensioner, for a vehicle occupant restraint system having a belt, comprises a housing, a gas generator for generating compressed gas in the case of restraint, a working space into which the compressed gas flows, a piston part displaceable by the compressed gas and a belt engaging device. The belt engaging device is in force-transferring relationship with the fastened belt. The tensioner further comprises a traction transfer device extending through the working space, which traction transfer device connects the belt engaging device with the piston part, and a sheathing for the traction transfer device which at least partially covers the traction transfer device within the working space. The sheathing is of a material having a temperature stability with respect to the hot compressed gas.

Abstract: Provided are compositions useful as paints which have excellent acid resistance and scratching resistance, and provide a good appearance. The thermoset compositions are comprised of a vinyl copolymer (A) comprised of lactone modified acrylic monomer and other monomer, a blocked polyisocyanate compound (B) which has been reacted with a mixture of malonic acid and acetoacetic acid, and an alkyl etherified amino resin (C).

Abstract: A safety belt buckle for insertion of a male lug designed to resist the action of a belt pretensioner, comprises a load bearing frame with a catch bolt slidingly mounted thereon and adapted to be moved between an unlocked and a locking position in which it engages the inserted male lug, a release button adapted to be operated to slide the catch bolt into its unlocked position for release of the male lug, a multiple-arm locking lever for preventing unintentional displacement of the release button, a pivot axis for the locking lever, and an inertial mass body movably mounted on the locking lever. The locking lever has a first and a second arm and being mounted on the frame for pivoting about the pivot axis. The first arm of the locking lever is pivotally coupled to the release button. Abrupt changes in velocity of the buckle in two opposite directions, appear during the belt pretensioning.

Abstract: A process is disclosed for producing a double-layered covering lacquer by using a transparent covering lacquer containing a hydroxyl group-containing polyacrylate resin produced by polymerizing (a) 10 to 51% by weight 4-hydroxy-n-butylacrylate or 4-hydroxy-n-butylmethacrylate or a mixture of 4-hydroxy-n-butylacrylate and 4-hydroxy-n-butylmethacrylate; (b) 0 to 36% by weight of a hydroxyl group-containing ester of acrylic acid different from (a) or a hydroxyl group-containing ester of methacrylic acid or a mixture of such monomers; (c) 28 to 85% by weight of an aliphatic or cycloaliphatic ester of methacrylic acid different from (a) and (b) with at least 4 C atoms in the alcohol residue or a mixture of such monomers; (d) 0 to 3% by weight of an ethylenically unsaturated carboxylic acid or a mixture of ethylenically unsaturated carboxylic acids and (e) 0 to 20% by weight of an ethylenically unsaturated monomer different from (a), (b), (c) and (d) or a mixture of such monomers, into a polyacrylate resin with a h

Abstract: The invention relates to a process for the preparation of multicoat finishes of the basecoat/clearcoat type in which transparent topcoats are employed which contain(A) as binder, an autocrosslinkable polyacrylate resin which contains on statistical average at least one epoxide group, at least one acid anhydride group and at least 0.2 tri-, di- or monoalkoxysilane group per molecule, or a mixture of such autocrosslinkable polyacrylate resins, and(B) at least one acid and/or at least one base as crosslinking catalyst.

Abstract: A piston and cylinder unit for use in a vehicle safety belt pretensioner is provided with a tubular cylinder and a piston slidably accomodated in the cylinder tube. The piston has a circumferential groove between a pair of axially spaced radial shoulders. A cable is connected to the piston. A pair of semi-annular disks are located in said the circumferential groove of the piston with circumferential ends bearing on each other. The semi-annular disks are held in positions with opposite oblique slope in relation to the central axis of the cylinder tube. An outer edge portion of each semi-annular disk is held in engagement with the inner wall surface of the cylinder tube. When the piston tends to move through the cylinder tube in a direction opposite to an operating stroke, the semi-annular disks are erected and jammed in the cylinder tube to block further movement of the piston.

Abstract: The invention relates to paints which contain a compound of the general formula (I) or a mixture of compounds of the general formula (I), the general formula (I) being ##STR1## and n, m, X, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and Y having the following meaning:- n stands for a number between 2 and 25, preferably for a number between 5 and 15- m stands for a number from 0 to 5- X and Y can be identical or different and stand for a functional group, for example a hydroxyl, amino, carboxyl or NCO group- R.sup.1 and R.sup.4 can be identical or different and stand for an alkylene radical, preferably for an alkylene radical having 1 to 6 carbon atoms, or for an arylene radical, preferably a phenylene radical- R.sup.2 and R.sup.3 can be identical or different and stand for an alkyl radical, preferably for an alkyl radical having 1 to 3 carbon atoms, or for an aryl radical, preferably for a phenyl radical- R.sup.5 stands for ##STR2## Z standing for X, Y or R.sup.2.

Abstract: A buckle for vehicle safety belt systems provided with a pretensioner engaging the buckle, is prevented by a locking pawl (42) from unintentional opening at the beginning and at the end of a pretensioning stroke. By the effect of its mass inertia at the start of the pretensioning stroke an inertial body moves the locking pawl (42) into a locking position in which the release button (30) is prevented from moving in a direction relative to the base in the pretensioning direction (R). Due to the location of its center of gravity relative to its mounting position the locking pawl (42) at the end of the pretensioning stroke remains in the locking position and is decoupled from the inertial body (56).