Compositions and process for imparting durable flame resistance to cellulosic textiles
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorsEmery I. Valko, deceased, Giuliana C. Tesoro, Walter F. Olds
Life of this patent
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Abstract
Flame resistance is imparted to cellulosic textiles by the application of compositions prepared by reacting phosphonic acid derivatives with ammonia or appropriate amine compounds. Textile compositions thusly obtained exhibit levels of flame resistance which remain essentially unchanged after 50 or more launderings. A comparison of textiles containing the instant compositions to textiles containing prior art flame retardants using verticle flammability tests, reveals that flame resistant textiles of the invention required one half or less of the amount of added compositions to pass the test as did prior art textiles.
Claims7
The compound having the following formula ##STR36## where R is an alkyl or a halogen-substituted alkyl having from 1 to 4 carbon atoms, and R' is an alkyl or halogen-substituted alkyl having from 1 to 4 carbon atoms.
The compound having the following formula ##STR37## where R is an alkyl or a halogen-substituted alkyl having from 1 to 4 carbon atoms.
A cellulosic textile product containing affixed thereon about 5% to 15% by weight of the compound having the following formula ##STR38## where R is an alkyl or halogen-substituted alkyl of from 1 to 4 carbon atoms, and R' is an alkyl or a halogen-substituted alkyl of from 1 to 4 carbon atoms.
A cellulosic textile product containing affixed thereon about 5% to 15% by weight of the compound having the following formula ##STR39## where R is an alkyl or halogen-substituted alkyl of from 1 to 4 carbon atoms.
A cellulosic textile product containing affixed thereon from about 5% to 15% by weight of the compound having the following formula ##STR40## where R is an alkyl or halogen-substituted alkyl of from 1 to 4 carbon atoms.
Dependencies are inferred from the claim text.