Acid treated polyester polyurethane foam end wrap

Claim 2

An end wrap for use in the permanent waving process which comprises a permeable flexible wafer of open-celled polyester polyurethane foam having a thickness of from about one-sixteenth inch to about one sixty-fourth inch, an average pore incidence within the range of from about 30 to 120 pores per linear inch and, contained in said end wrap, a solid, carboxylic acid having a pK 1 of from about 2.5 to about 6.0 and a water-solubility of from about 0.1 to 10.0 parts acid per 100 parts water at 15° -20° C., said acid being present at a level of at least 5 milligrams of acid per cubic inch of foam.

Claim 3

An end wrap according to claim 1 wherein the wafer of polyester polyurethane foam has a thickness of 1/32 inch.

Claim 4

An end wrap according to claim 1 wherein the wafer of polyester polyurethane foam has an average pore incidence of 80 pores per linear inch.

Claim 5

An end wrap according to claim 1 wherein the carboxylic acid is selected from the group of acids consisting of succinic, adipic, itaconic, suberic, azelaic, pimelic, benzoic, fumaric, mesaconic and o-phthalic acids.

Claim 6

An end wrap according to claim 4 wherein carboxylic acid is selected from the group consisting of succinic acid, adipic acid and itaconic acid and the amount of acid contained in said end wrap is from about 9 to about 300 milligrams/cubic inch of end wrap.

Claim 7

The process of imparting a permanent wave to hair which comprises the steps of forming the hair into tresses, wrapping about the end of each tress a permeable, flexible wafer of polyester polyurethane foam having a thickness of from about one-sixteenth inch to about one sixty-fourth inch, said wafer containing a solid, weak, carboxylic acid having a pK 1 of from about 2.5 to about 6.0 and a water solubility of from about 0.1 to 10.0 parts acid per 100 parts water at 15° C. - 20° C., said acid being present at a level of at least 5 milligrams of acid per cubic inch of wafer, winding each tress on a cylindrical body, saturating each wound tress with a keratin-reducing composition and thereafter neutralizing the action on the hair of said keratin-reducing composition.

Claim 8

The process of imparting a permanent wave to hair which comprises the steps of forming the hair into tresses, wrapping about the end of each tress a permeable, flexible wafer of polyester polyurethane foam having a thickness of from about one-sixteenth inch to about one sixty-fourth inch, said wafer containing a solid, weak, carboxylic acid having a pK 1 of from about 2.5 to about 6.0 and a water solubility of from about 0.1 to 10.0 parts acid per 100 parts water at 15° C. - 20° C., said acid being present at a level of at least 5 milligrams of acid per cubic inch of wafer, winding each tress on a cylindrical body, saturating each wound tress with a keratin-reducing composition and thereafter neutralizing the action on the hair of said keratin-reducing composition.

Claim 9

A process according to claim 6 wherein the wafer of polyester polyurethane foam has a thickness of 1/32 inch and an average pore incidence of 80 pores per linear inch.

Claim 10

A process according to claim 6 wherein carboxylic acid is selected from the group of acids consisting of succinic, adipic and itaconic acids.

Claim 11

A process according to claim 6 wherein the carboxylic acid is adipic acid and the amount of said acid contained in said wafer is from about 9 to about 300 milligrams/cubic inch of wafer.