摘要:
In a castable, curable composition for producing plastic molded articles, comprising a sirup containing a proportion of acrylic acid monomer and/or derivatives thereof, in order to achieve an improved boiling resistance of the plastic molded articles produced from the composition, it is proposed that a proportion of a further component of the formula (I) ##STR1## which contains an ethylenically unsaturated group of the formula (II) --R.sub.5 --R.sub.6 (II) and/or contains a group of the formula (III) ##STR2## be added. The sirup may also optionally contain a proportion of a prepolymer, in particular PMMA, and, in addition, a particulate, inorganic filler in a proportion of 50 to 90% by weight in relation to the total composition, pigments and a radical initiator system are contained in the sirup. The viscosity of the total composition is .ltoreq.100 Pa.multidot.s, and the ratio of the sum of the weight content of the acrylic acid monomer and its derivatives to the sum of the weight content of the further component and the weight content of PMMA is 99:1 to 30:70, and, in the presence of PMMA, the ratio of the weight content of the further component to the weight content of the PMMA is at least 5:95.
摘要:
In a casting composition comprising a curable syrup which contains a liquid monomer and polymer components optionally dissolved therein, and an inorganic filler which includes a quartz sand product, in order to simplify the production of white molded articles, it is proposed that a product, the individual grain of which consists in the core essentially of quartz and at the surface essentially of .alpha.-cristobalite (low-temperature modification) be selected as quartz sand product.
摘要:
To improve the resistance to scratching of plastic molded articles comprising a polymer matrix filled with inorganic fillers, the filler content being 50 to 90% by weight in relation to the filled matrix, it is suggested that the filler comprise two filler fractions (a) and (b), wherein the filler fraction (a) has a particle size distribution with 98% by weight of the particles having a particle size .ltoreq.150 .mu.m and is distributed essentially uniformly in the polymer matrix, and wherein the filler fraction (b) comprises particles having a particle size of approximately 300 .mu.m to approximately 3000 .mu.m, wherein the proportion of the filler fraction (b) is approximately 1 to 35% by weight of the total filler content, and wherein the proportion of the filler fraction (b) in an outer surface layer of the molded article is enriched to at least 30% by weight in relation to the total mass of the filled matrix.
摘要:
An assembly plant, in particular for assembling motor vehicles, which permits design of final assembly of motor vehicles so that it is as flexible as possible in terms of space. A central elongated assembly hall is provided in which essentially automated assembly regions are provided and finger-like partial regions having essentially manual workplaces are provided projecting at a right angle from the longitudinal side. A change in the sequence in the manual regions can be accomplished easily by an extension of the finger-like partial regions at the head end.
摘要:
An assembly plant, in particular for assembling motor vehicles, which permits design of final assembly of motor vehicles so that it is as flexible as possible in terms of space. A central elongated assembly hall is provided in which essentially automated assembly regions are provided and finger-like partial regions having essentially manual workplaces are provided projecting at a right angle from the longitudinal side. A change in the sequence in the manual regions can be accomplished easily by means of an extension of the finger-like partial regions at the head end.