초록 ▼

The invention relates to a dry cleaning solvent resistant hydrophilic urethane polymer having about 0.5 to 10 weight percent of a hindered phenolic antioxidant reacted into its structure. The invention also relates to a hindered phenolic antioxidant capable of being reacted into the polymer. The inv

The invention relates to a dry cleaning solvent resistant hydrophilic urethane polymer having about 0.5 to 10 weight percent of a hindered phenolic antioxidant reacted into its structure. The invention also relates to a hindered phenolic antioxidant capable of being reacted into the polymer. The invention also relates to a dry cleaning solvent resistant waterproof, moisture-vapor permeable material such as a laminate or a unitary sheet material. The unitary sheet material comprises a microporous polymeric matrix having pores comprising continuous passages extending through its thickness and opening into the opposite surfaces thereof, the passages being sufficiently filled with a moisture-vapor permeable, water-impermeable, hydrophilic material which comprises the polymer having the antioxidant reacted into its structure which prevents the passage of water and other liquids through the unitary sheet material while readily permitting moisture vapor transmission therethrough rendering the sheet material breathable. The unitary sheet material is made by causing a liquid composition comprising a hydrophilic material precursor to flow into the pores of the matrix, then causing the conversion thereof to solid hydrophilic material.

대표청구항 ▼

A polymer comprising a moisture-vapor permeable, water-impermeable, hydrophilic urethane polymer having a hindered phenolic antioxidant reacted into its structure wherein said urethane polymer comprises the reaction product of a polyisocyanate having an NCO functionality of at least about 2.0 with a

A polymer comprising a moisture-vapor permeable, water-impermeable, hydrophilic urethane polymer having a hindered phenolic antioxidant reacted into its structure wherein said urethane polymer comprises the reaction product of a polyisocyanate having an NCO functionality of at least about 2.0 with a polyol having at least two hydroxyl groups and a polyurethane oxide content of from about 20 to about 100 percent by weight based upon the weight of the polyol, wherein said hindered phenolic antioxidant is selected from the group consisting of hindered phenolic antioxidants of the general formula CR[(CH2)x－OH]3-y[(CH2)1－OP]y wherein R is selected from the group consisting of －H, －CH3, －C2H5, －(CH2)wOH, and －(CH2)wOP; q is an integer of 0 to 2; x is an integer of 0 to 2; y is an integer of 1 to 2; w is an integer of 0 to 2; and P has the general formula [Figure] wherein R1 represents a tertiary butyl group and wherein the values of x, q, and w are such that not more than one of x, q, and w can equal 0 at a time; and hindered phenolic antioxidants of the general formula [Figure] wherein R3 has the formula [Figure] wherein R5 is a tertiary butyl group; and R4 is selected from the group consisting of －H, an alkyl group, and －CH2OH; and wherein the hydrophilic urethane polymer comprises the reaction product of: (a) about 0.1 to about 10 weight percent of the hindered phenolic antioxidant; (b) about 5 to about 60 weight percent of a polyisocyanate; and (c) about 10 to about 70 weight percent of a polyol composition having an average molecular weight of about 500 to about 4000 comprising about 20 to 100 weight percent polyethylene oxide based upon the weight of the polyol composition.