Accelerated melamine-aldehyde resin and method of making a fast-curing laminate therewith
AssigneeWestinghouse Electric Corp.
InventorJoseph F. Meier
Life of this patent
Estimating the term…
Abstract
An accelerated melamine-aldehyde resin is made by mixing about 0.001 to about 2% of a free-radical generator into the resin. A laminate is made by preparing a composition of an aldehyde and melamine in a mole ratio of about 1.5 to about 2.0, adjusting the pH of the composition to about 7 to about 9, heating the composition until a sample of it produces a positive hydrophobe in ice water, mixing about 0.001 to about 2% of a free-radical generator and up to about 80 phr of a solvent into the composition, coating paper with the composition to a weight ratio of coated paper to uncoated paper of about 1.2 to about 2.5, drying the composition and partially curing the compositin, stacking the coated paper, and curing the stack under heat and pressure.
Claims15
A method of accelerating the cure of a resin consisting essentially of melamine and an aldehyde comprising mixing a solution of said resin having a pH between 7 and 9 with about 0.001 to about 2% (based on said resin) of a free-radical generator soluble in said resin before curing said resin.
A composition comprising a solution of a resin consisting essentially of melamine and an aldehyde having a pH between 7 and 9 and containing about 0.001 to about 2% (based on said resin) of a soluble free-radical generator.
Dependencies are inferred from the claim text.