Paper containing rapid curing melamine-formaldehyde resin composition
First Claim
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1. Paper of at least about 60% α
- -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 β
-staged resin composition comprisinga. 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 etherd. 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, ande. a curing catalyst.
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Abstract
Paper of at least about 60% α-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 β-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.
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Citations
12 Claims
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1. Paper of at least about 60% α
- -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 β
-staged resin composition comprisinga. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- -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 β
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11. Paper of at least about 60% α
- -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 β
-staged resin composition comprisinga. 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.
- -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 β
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12. Paper of at least 60% α
- -cellulose content having impregnated therein, from about 55% to about 65%, by weight, based on the weight of the paper, of a β
-staged resin composition comprisinga. 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.
- -cellulose content having impregnated therein, from about 55% to about 65%, by weight, based on the weight of the paper, of a β
Specification