Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent
1992-12-18
1994-07-05
Page, Thurman K.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
528 76, 528 77, 528904, 5147723, 424445, 424 7837, C08G 1812
Patent
active
053268474
ABSTRACT:
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.
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Burleigh Malcolm B.
Mader Roger A.
Dowdall Janice L.
Griswold Gary L.
Kirn Walter N.
Levy Neil
Minnesota Mining and Manufacturing Company
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