Production of striking surfaces for matches

Details Production of striking surfaces for matches Production of striking surfaces for matches

1980-07-09

1982-02-16

Morgenstern, Norman

Coating processes

With post-treatment of coating or coating material

Heating or drying

44 25, 44 48, 427391, 427393, 428481, 428503, B05D 302

Patent

active

043159613

ABSTRACT:
The invention relates to a process for making striking surfaces wherein red phosphorus, abrasive agents, and binders which are in the form of aqueous urea/formaldehyde or melamine/formaldehyde-condensates, are made into an aqueous suspension which is applied on to a striking surface substrate. More particularly, the suspension, based on the solid matter content of the condensates used as binder, is admixed with 5 to 20 weight %, calculated as solid matter, of an agent cross-linking the amine resin, the cross-linking agent being a polyester or copolymer produced by subjecting an acryl and/or methacryl ester to copolymerization with vinyl acetate in a ratio by weight of 1:9 to 9:1. A pH-value within the range 6.5 to 8.0 is established in the mixture, in the event of the cross-linking agent being a copolymer, or a pH-value within the range 7 to 11 is established, in the event of the cross-linking agent being a polyester.

REFERENCES:
patent: 2863751 (1958-12-01), Ledaal
patent: 3441456 (1969-04-01), Uffner

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