Process for the preparation of solid photoactivator formulations

Details Process for the preparation of solid photoactivator formulations Process for the preparation of solid photoactivator formulations

1984-03-19

1985-10-22

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Bleaching

8103, 8137, 25230116, 25230121, 26024582, 26024586, C09B 4720, C09B 6754, C11D 339, D06L 312

Patent

active

045486107

ABSTRACT:
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 .ANG. 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.

REFERENCES:
patent: 4166718 (1979-09-01), Reinert et al.
patent: 4390342 (1983-06-01), Bruttel et al.
patent: 4394125 (1983-07-01), Holzle et al.
patent: 4405329 (1983-09-01), Abel et al.
patent: 4466900 (1984-08-01), Horlacher et al.
Chemical Abstract, vol. 95, 1981, 117056.

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