摘要:
Lustrous pigments having a wide range of colors and especially suitable for the cosmetics industry are produced by forming an aluminum lake on a micaceous pigment coated with aluminum hydroxide.
摘要:
A developer suitable for use with positive photoresists is based on a buffered aqueous-alkaline solution containing non-ionic surfactants and contains in the solution 1-100 ppm of the surfactants, preferably of the ethoxylated-alkylphenol type. The resultant photoresist shows outstanding properties with respect to the resolution and edge sharpness obtainable in the developed resist image and with respect to its developing activity, developing capacity and stability.
摘要:
The invention relates to oxide particles which have a surface modification by covalently bonded organic groups which allow covalent bonding into polymer materials. These particles are particularly advantageous in their use as fillers or modifying agents in polymer materials, in particular polymer films.
摘要:
The invention relates to the use of momodisperse, non-porous, spherical particles based on SiO.sub.2, TiO.sub.2, ZrO.sub.2, Al.sub.2 O.sub.3, V.sub.2 O.sub.5, Nb.sub.2 O.sub.5 or mixed systems thereof, which are optionally modified on the surface by covalently bonded organic groups, as fillers in organic matrix materials, the refractive index of the particles being adapted to the refractive index of the organic matrix according to the use.Polymeric or polymerizable systems which comprise these particles can be used, for example, as embedding compositions for optical, electro-optical and optoelectronic components. Such embedding compositions show an improved optical homogeneity. Light-emitting diodes produced with them are distinguished, inter alia, by an improved light yield.
摘要:
The invention relates to preparations of monodisperse spherical oxide particles in the form of free-flowing powders of agglomerates in which the particles are bonded to one another by a binder. With these preparations, the oxide particles can be homogeneously dispersed in polymer systems with particular ease.
摘要:
Moldings, preferably comprising polyester which contains oxide particles which have been subjected to a surface modification with a silylating agent of the formula I �R.sup.1 R.sup.2 R.sup.3 !Si--(CH.sub.2).sub.l --X--R.sup.4 (I) wherein R.sup.1 is Cl or alkoxy having 1 to 6 carbon atoms, R.sup.2 and R.sup.3 are alkyl having 1 to 6 carbon atoms or R.sup.1, l is a number from 1 to 6, X is a single bond, O, NH, CONH or NHCONH, R.sup.4 is ##STR1## where Y is CH, ##STR2## Z is OR or two radicals Z together are --O-- or NR and m and n are a number from 0 to 6, or R.sub.4 is ##STR3## where X is a single bond and R, R' and R" are H or alkyl having 1 to 6 carbon atoms, and the use of said moldings are described.
摘要:
The invention relates to dispersions of spherical inorganic particles, organic dispersing media having solidification points in the range of 20.degree.-120.degree. C. being used as dispersants.