Ciba-geigy Corporation

Kenneth Winterbottom

Derek James Massy

Heinz Abel

George E Green

Bryan Dobinson

Bernard Peter Stark

Melvin Harris

Advanced, etherified aminoplast resins containing one or more guanamine residues are prepared by heating, at a pH of from 2.5 to 9, an etherified methylolated urea, cyclic urea, carbamate or melamine such as methylated methylolated urea, ethyleneurea, or propyleneurea with a guanamine, such as benzoguanamine or acetoguanamine. The products may be heated with resins containing at least two alcoholic hydroxyl, carboxylic acid, or carboxylic acid amide groups per molecule to form hard, crosslinked materials. They are particularly useful in forming surface coatings.

Process for advancing etherified aminoplast resins with a guanamine

Highly methylated methylolguanamines, such as a methylated tetramethylolbenzoguanamine or tetramethylolacetoguanamine, are advanced by heating under acid to neutral conditions with an advancement agent such as benzoguanamine, acetoguanamine, ethyleneurea, 1,3-propyleneurea, melamine, or urea. The products may be heated with resins containing at least two alcoholic hydroxyl, carboxylic acid, or carboxylic amide groups per molecule to form hard, crosslinked coatings. They are particularly useful in powder coatings.

Process for advancing highly methylated methylolguanamines with

Curable compositions, suitable for use as surface coatings, comprise

Aqueous coating compositions containing a mercaptan polyester and an

A process for finishing keratinous material, especially rendering it shrink-resistant or imparting to it durably pressed effects, comprises

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Cambridge, United Kingdom

Kenneth Winterbottom