Hydroxyisopropylmelamine modified melamine-formaldehyde resin
AssigneeAmerican Cyanamid Company
InventorsRonald J. Keeling, Jin-Young K. Roe, Henry C. Mollmann
Life of this patent
Estimating the term…
Abstract
Hydroxyalkylmelamines are disclosed as ingredients in various resins which find use as the resin component of heat and pressure consolidated laminates, especially decorative laminates having either post-formability or a core having a color matching that of the decor sheet.
Claims3
A composition of matter comprising a blend of (1) (a) a hydroxyalkyl melamine or (b) a reaction product of a hydroxyalkyl melamine and formaldehyde and (2) a melamine/formaldehyde resin, the ratio of (a) to (2) ranging from about 1:1 to about 1:20, respectively, the ratio of (b) to (2) ranging from about 20:1 to about 1:20, respectively, the molar ratio of hydroxyalkylmelamine to formaldehyde in (b) ranging from about 1:0.05 to about 1:3, respectively, and the molar ratio of melamine to formaldehyde in (2) ranging from about 1:1 to about 1:3, respectively, said hydroxyalkyl melamine having the formula ##STR5## wherein R' is a C.sub.1 -C.sub.8 linear or branched chain alkyl group, a C.sub.6 -C.sub.10 aryl group or R.sup.2 and R.sup.2 is --NH.sub.2, --NH(CH.sub.2).sub.x OH or ##STR6## wherein x is 3-8, inclusive, and at least one of R.sup.2 is a hydroxyalkylamine group.
A cellulosic paper sheet having impregnated therein from about 15% to about 80%, by weight, based on the weight of the paper, of
- (A) a m hydroxyalkylmelamine/formaldehyde reaction product having a molar ratio of hydroxyalkylmelamine to formaldehyde of from about 1:0.05 to about 1:3, respectively, or
- (B) a blend of A, above, and a melamine/formaldehyde resin, the ratio of A to melamine/formaldehyde resin ranging from about 20:1 to about 1:20, respectively, and the ratio of melamine to formaldehyde ranging from about 1:1 to 1:3, respectively, or
- (C) a blend of a hydroxy alkyl melamine and a melamine/formaldehyde resin, the ratio of hydroxy alkyl melamine to melamine/formaldehyde resin ranging from about 1:1 to about 1:20, respectively, and the ratio of melamine to formaldehyde ranging from about 1:1 to about 1:3, respectively,
- said hydroxyalkyl melamine having the formula ##STR7## wherein R' is a C.sub.1 -C.sub.8 linear or branched chain alkyl, a C.sub.6 -C.sub.10 aryl, or R.sup.2 and R.sup.2 is --NH.sub.2 --NH(CH.sub.2).sub.x OH or ##STR8## wherein x is 3-8, inclusive, and at least one R.sup.2 is a hydroxyalkylamine group.
Dependencies are inferred from the claim text.