公开(公告)号：DE59910165D1

公开(公告)日：2004-09-16

申请号：DE59910165

申请日：1999-05-04

Applicant: BASF AG

Inventor： RUPANER ROBERT DR ,  LEYRER REINHOLD J DR ,  SCHUMACHER PETER DR

IPC: B05D5/06 ,  C08F2/22 ,  C08F257/02 ,  C08F265/04 ,  C08F285/00 ,  C08J3/12 ,  C08F291/00 ,  C08J3/20 ,  C08J5/18 ,  C09D5/29 ,  C09D5/36 ,  C09D7/12 ,  C09D151/00

Abstract: Core shell (C/S) particles comprises a shell (S) made from film forming material, and a core (C) that is resistant to deformation under the film forming conditions for (S). The core is not swollen or only very slightly swollen by (S), and has a mono-disperse particle size distribution. Materials (C) and (S) have different refractive indices. Independent claims are also included for the following: (a) production of the C/S particles by homogenising previously prepared core polymer particles with monomers or prepolymers of the shell polymer in an inert medium, and polymerising the mixture under conditions such that the shell polymer (or precursor) is deposited on the core; (b) production of decorative and/or protective coatings comprises applying the particles or preparations to optionally pretreated substrates, removing any liquid dispersant and/or diluent, forming a film of the shell material, and crosslinking if required, with orientation of the core; and (c) production of effect colours, by applying the particles or preparations to a low adhesion substrate, possibly evaporating any solvent or diluent, converting the shell material into a liquid, soft or viscoelastic matrix phase, orienting the core at least to domains with a regular structure, hardening the shell material to fix the core structure, detaching the hardened film from the substrate and milling to the required particle size (to produce a pigment or powder).

公开(公告)号：AT260636T

公开(公告)日：2004-03-15

申请号：AT99119877

申请日：1999-10-07

Applicant: BASF AG

Inventor： SCHUMACHER PETER DR ,  PRECHTL FRANK DR

IPC: A61K8/00 ,  A61K8/02 ,  A61K8/33 ,  A61K8/34 ,  A61K8/36 ,  A61K8/368 ,  A61K8/41 ,  A61K8/46 ,  A61K8/49 ,  A61K8/72 ,  A61K8/81 ,  A61K8/85 ,  A61K31/74 ,  A61P17/00 ,  A61Q5/00 ,  A61Q17/04 ,  A61K7/00 ,  A61K7/42

Abstract: Cholesteric liquid-crystalline polymers, especially cholesteric liquid-crystalline polyesters, polycarbonates or polyamides, are used as photostable UV screens in cosmetic and pharmaceutical preparations for protecting the human epidermis or hair against UV radiation, especially in the region from 280 to 450 nm.