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PROCESS FOR THE PREPARATION OF SOLID PHOTOACTIVATOR FORMULATIONS CONTAINING SULPHONATED ZINC AND OR ALUMINIUM PHTHALOCYANINES
PROCESS FOR THE PREPARATION OF SOLID PHOTOACTIVATOR FORMULATIONS CONTAINING SULPHONATED ZINC AND OR ALUMINIUM PHTHALOCYANINES
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机译:包含硫酸锌和/或铝酞菁的固体光活化剂配方的制备方法
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摘要
The invention relates to a process for the preparation of solid photoactivator formulations containing sulfonated zinc or aluminum phthalocyanines. The process comprises passing a crude solution containing these compounds through a semipermeable asymmetrical membrane having a pore diameter of 1 to 500 ANGSTROM and drying the photoactivator solution obtained under mild conditions. The membrane consists of a basic structure of cellulose acetate, polyacrylonitrile or a copolymer of acrylonitrile and other ethylenically unsaturated monomers. This basic structure is modified in a specific manner with ionic groups. If desired, fillers and/or surfactants customarily employed in the detergent industry may be added to the concentrated solution before it is dried. The solid photoactivator formulations so obtained have excellent storage stability, are substantially non-hygroscopic, and contain exceedingly small amounts of undesirable organic impurities.
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