Stabilization of protein-fiber-containing textiles

Claim 1

AS AN ARTICLE OF MANUFACTURE, A TEXTILE MATERIAL CONTAINING PROTEIN FIBERS MODIFIED BY 0.7 TO 8% BY WEIGHT OF AN INSOLUBLE PRODUCT OBTAINED BY THE HEATING OF AN IMPREGNANT THEREON COMPRISING A SALT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF AMMONIUM HYDROXIDE, VOLATILE AMINES, AND QUATERNARY AMMONIUM HYDROXIDES WITH A CONDENSATION PRODUCT OF 40 TO 60 PARTS BY WEIGHT OF AN ORGANIC SOLVENT-SOLUBLE (C3-C5) ALKYLATED CONDENSTATE OF FORMALDEHYDE WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF UREA, THIOUREA, IMIDAZOLIDINONE-2, ACETOGUANAMINE, BENZOGUANAMINE, MELAMINE, AND MONOAND DI-(C1-C4) ALKYLMELAMINES WITH 40 TO 60 PARTS BY WEIGHT OF A POLYESTER HAVING AN AVERAGE MOLECULAR WEIGHT OF ABOUT 800 TO 1500 CONTAINING HYDROXYL GROUPS, FREE CARBOXYL GROUPS, AND AN ACID NUMBER BETWEEN ABOUT 90 AND ABOUT 100, THE POLYESTER BEING A CONDENSATION PRODUCT OF AN AROMATIC MEMBER SELECTED FROM THE GROUP CONSISTING OF O-PHTHALIC ACID, O-PHTHALIC ACID CONTAINING LOWER ALKYL SUBSTITUENTS IN THE RING AND THEIR ANHYDRIDES WITH A CONDENSATION PRODUCT SELECTED FROM THE GROUP CONSISTING OF (A) POLYESTERS HAVING AN ACID VALUE OF NOT OVER 10 AND OBTAINED FROM THE CONDENSATION OF A MIXTURE OF AT LEAST ONE DIBASIC ALIPHATIC ACID HAVING 5 TO 10 CARBON ATOMS WITH A POLYOL MATERIAL CONTAINING AT LEAST 25 MOLE PERCENT OF AT LEAST ONE POLYOL CONTAINING AT LEAST THREE HYDROXYL GROUPS, THE PROPORTIONS IN THE MIXTURE BEING IN THE RANGE OF 1.2 TO 1.8 MOLES OF POLYOL TO EACH MOLE OF ACID, AND (B) POLYESTERS AS OBTAINED IN (A) BUT MODIFIED BY CONDENSATION WITH A FATTY ACID HAVING 8 TO 30 CARBON ATOMS; THE PROPORTION OF THE AROMATIC MEMBER TO THE TOTAL POLYOL MATERIALS BEING IN THE RANGE OF 2 TO 3.5 MOLES OF THE FORMER FOR EACH 3 MOLES OF THE LATTER.