Coatable urea-aldehyde compositions containing a cocatalyst, coated abrasives made using same, and methods of making coated abrasives
OwnerJeffrey Ford, Harold Rudeinventors
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Abstract
The invention relates to an adhesive composition comprising a formaldehyde-containing aminoplast resin and a catalysing compound, with the catalysing compound being an acid or is able to release an acid with a pKa lower than 4 and with the formaldehyde-containing aminoplast resin having a F/(NH2)2 ratio lower than or equal to 1. The catalysing compound comprises at most 11 wt. % of an ammonium salt. The invention also relates to a process for the preparation of board material using the adhesive composition according to the invention and to the board material thus obtainable.
Claims17
Adhesive composition comprising a formaldehyde-containing aminoplast resin and a catalysing compound, characterised in that the catalysing compound is an acid or is able to release an acid with a pKa lower than 6, under the proviso that the catalysing compound comprises at most 11 wt. % of an ammonium salt, and in that the formaldehyde-containing aminoplast resin has a F/(NH2)2 ratio which is lower than or equal to 1.
Dependencies are inferred from the claim text.