Process to impart smooth-dry and flame retardant properties to cellulosic fabric
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorRobert J. Harper, Jr.
Life of this patent
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Abstract
Fabric is padded with a solution of nitrogen rich N-methylol crosslinking agent, acid catalyst, antimony oxide and a halogen containing alcohol; dried at about 140.degree.-190.degree. F. and then cured at about 250.degree.-400.degree. F. for sufficient time to impart smooth-dry and flame retardant properties to said fabric. Aqueous polyethylene or silicone emulsion softeners can be added to the padding solution if desired. Glycol, polyol and dibromoneophentyl glycol make exemplary halogen containing alcohols. The process can also be varied to first pad with antimony oxide, dry, and then repad with a solution of: nitrogen rich N-methylol crosslinking agent, acid catalyst, and a halogen containing alcohol, dry again and cure, at the temperatures specified supra.
Claims14
A process for imparting smooth-dry and flame retardant properties to cellulosic fabrics comprising:
- (a) padding a cellulosic fabric with a solution comprising sufficient amounts of:
- N-methylol crosslinking agent, an acid catalyst, a halogen containing alcohol, and antimony oxide to produce smooth-dry flame retardant properties in the fabric;
- (b) drying said cellulosic fabric for sufficient time and at sufficient temperature to drive off the moisture;
- and then,
- (c) curing said cellulosic fabric for sufficient time and temperature to impart smooth-dry flame retardant properties to said fabric.
A process for imparting smooth-dry and flame retardant properties to cellulosic fabrics comprising:
- (a) padding a cellulosic fabric with a solution of from about 3% to 15% antimony oxide;
- (b) drying said fabric for sufficient time and at sufficient temperature to drive off the moisture;
- (c) repadding said fabric with a solution comprising sufficient amounts of:
- N-methylol crosslinking agent, an acid catalyst, and a halogen containing alcohol to produce smooth-dryflame retardant properties in the fabric;
- (d) drying said fabric for sufficient time and temperature to drive off the moisture;
- and then,
- (e) curing said cellulosic fabric for sufficient time and temperature to impart smooth-dry flame retardant properties to said fabric.
Dependencies are inferred from the claim text.