Paper containing rapid curing melamine-formaldehyde resin composition

• US 4,076,896 A
• Filed: 12/01/1976
• Issued: 02/28/1978
• Est. Priority Date: 06/16/1976
• Status: Expired due to Term

• Current Assignee: Formica Technology, Inc.
• Original Assignee: Formica Corporation (Broadview Holding BV)
• Inventors: Bunkowski, Kenneth Dana
• Primary Examiner(s): Kendell, Lorraine T.
• Application Number:
  US05/746,445
• Time in Patent Office: 454 Days
• Field of Search: 428/411, 428/524, 428/526, 428/530, 428/537, 427/391, 260/29.4 R, 260/67.6 R, 260/32.8 N, 162/166, 162/167
• US Class Current: 428/530
• CPC Class Codes: D21H 17/06 Alcohols; Phenols; Ethers; Aldehydes; Ketones; Acetals; Ketals
• CPC Class Codes: D21H 17/09 Sulfur-containing compounds
• CPC Class Codes: D21H 17/51 Triazines, e.g. melamine
• CPC Class Codes: D21H 27/24 characterised by the surface to be covered being phenolic-resin paper laminates, vulcan fibre or similar cellulosic fibreboards
• CPC Class Codes: Y10T 428/31964 Paper

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.

Claims

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 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.

2. A paper according to claim 1 wherein (b) is p-toluene sulfonamide.

3. A paper according to claim 1 wherein (b) is a mixture of o- and p-toluene sulfonamide.

4. A paper according to claim 1 containing, in addition thereto (f) from about 0.1% to about 1.5%, by weight, same basis, of a lecithin.

5. A paper according to claim 1 wherein said (e) is ammonium sulfate.

6. A paper according to claim 1 wherein said composition has a pH ranging from about 9.0 to about 9.8.

7. A method for the production of the paper of claim 1 which comprises impregnating said paper with said resin composition, drying the resultant impregnated paper under heat sufficient to β

-stage said resin composition and recovering the resultant paper.

8. A method according to claim 7 wherein said (b) is p-toluene sulfonamide.

9. A method according to claim 7 wherein said (b) is a mixture of o- and p-toluene sulfonamide.

10. A method according to claim 7 wherein said (e) is ammonium sulfate.

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 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.

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 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.