Paper containing rapid curing melamine-formaldehyde resin composition
AssigneeFormica Corporation
InventorKenneth Dana Bunkowski
Life of this patent
Estimating the term…
Abstract
Paper of at least about 60% .alpha.-cellulose content, a basis weight of about 50-90 pounds per 3000 square foot ream, a pH of about 6.75.+-.0.5 and a Gurley porosity of about 15-25 seconds per 100 c.c. of air having impregnated therein from about 55% to about 65%, by weight, based on the weight of the paper, of a .beta.-staged resin composition comprising A. the resinous reaction product of melamine, formaldehyde and diethylethanolamine, B. an ortho- or para-toluene sulfonamide, C. ethyleneglycol phenyl ether, D. water and E. a catalyst, And a method for the production thereof, are disclosed.
Claims12
Paper of at least about 60% .alpha.-cellulose content having a basis weight of from about 50 to about 90 pounds per 3000 square foot ream, a pH of from about 6.25 to about 7.25, a Gurley porosity of from about 15 to about 25 seconds per 100 c.c. of air and, impregnated therein, from about 55% to about 65%, by weight, based on the weight of the paper, of a .beta.-staged resin composition comprising
- a. the resinous reaction product of melamine, formaldehyde and from about 0.07 to about 0.16%, by weight, of diethylethanolamine, having a ratio of formaldehyde to melamine of from about 1.7 to about 1.9 to 1, respectively,
- b. at least about 1.0%, by weight, of ortho- or para- or mixtures of ortho- and para-toluene sulfonamide,
- c. from about 1.0% to about 5%, by weight, of ethyleneglycol phenyl ether
- d. from about 40% to about 45%, by weight, of water, the remainder being melamine-formaldehyde resin, all percentages being based on the total weight of the composition, and
- e. a curing catalyst.
Paper of at least about 60% .alpha.-cellulose content having a basis weight of from about 50 to about 90 pounds per 3000 square foot ream, a pH of from about 6.25 to about 7.25, a Gurley porosity of from about 15 to about 25 seconds per 100 c.c. of air and, impregnated therein, from about 55% to about 65%, by weight, based on the weight of the paper, of a .beta.-staged resin composition comprising
- a. the resinous reaction product of melamine, formaldehyde and from about 0.07 to about 0.16%, by weight, of diethylethanolamine, having a ratio of formaldehyde to melamine of from about 1.7 to about 1.9 to 1, respectively,
- b. at least about 1.0%, by weight, of ortho- or para- or mixtures of ortho- and para-toluene sulfonamide,
- c. from about 1.0% to about 5.0%, by weight, of ethyleneglycol phenyl ether and
- d. from about 40% to about 45%, by weight, of water, the remainder being melamine-formaldehyde resin, all percentages being based on the total weight of the composition.
Paper of at least 60% .alpha.-cellulose content having impregnated therein, from about 55% to about 65%, by weight, based on the weight of the paper, of a .beta.-staged resin composition comprising
- a. the resinous reaction product of melamine, formaldehyde and from about 0.07 to about 0.16%, by weight, of diethylethanolamine, having a ratio of formaldehyde to melamine of from about 1.7 to about 1.9 to 1, respectively.
- b. at least about 1.0%, by weight, of ortho- or para- or mixtures of ortho- and para-toluene sulfonamide
- c. from about 1.0% to about 5.0%, by weight, of ethyleneglycol phenyl ether and
- d. from about 40% to about 45%, by weight, of water, the remainder being melamine-formaldehyde resin, all percentages being based on the total weight of the composition.
Dependencies are inferred from the claim text.