Air Products and Chemicals, Inc.

Jeffrey Raymond Quay

Jeremiah P Casey

Shiying Zheng

Thomas M Santosusso

Edwin L McInnis

Lloyd Mahlon Robeson

Kenneth Merle Kem

Lisa Ann Mercando

Sherri L Bassner

M Keith Murphy

Sherri Lynn Bassner

Thomas Michael Santosusso

Edwin Lee Mcinnis

A method for preparing a polymeric material includes: providing a polymeric matrix having at least one polymer and at least one porogen; and degrading the at least one porogen at a temperature T&#x2266;1.1 T, where Tis a glass transition temperature of the polymeric matrix. The degrading step includes exposing the polymeric matrix to thermal degradation, chemical degradation, electrical degradation and/or radiation degradation, wherein the polymeric material has a permeability at least 1.2 times a permeability of the polymeric matrix for a gas, and a selectivity of the polymeric material is at least 0.35 times a selectivity of the polymeric matrix for a gas pair. The method preferably provides gas separation membranes that exceed Robeson's upper bound relationship for at least one gas separation pair. Novel polymeric materials, gas separation membranes and fluid component separation methods are also described.

Polymers, polymer membranes and methods of producing the same

The invention describes a polymeric material comprising repeating units of Formulae I-III and methods of preparation. Novel polymeric materials, gas separation membranes and fluid component separation methods are also described. 

The disclosure relates to acid-based polymeric dispersants containing 2-[2-(2-methoxyethoxy)ethoxy]acetic acid for dispersing metal oxide nanoparticles in organic solvents such as methyl ethyl ketone (MEK) and butyl acetate.

Acid-based polymeric dispersants with 2-[2-(2-methoxyethoxy)ethoxy]acetic acid

Hot melt adhesives comprising low free monomer, low oligomer isocyanate prepolymers

An isocyanate-terminated polyurethane prepolymer comprising the reaction product of a polyisocyanate and a polyol composition consisting essentially of a polyether polyol of 350-2000 equivalent weight and a low molecular weight polyol of 62 to&lt;300 molecular weight, in an equivalent ratio of low molecular weight polyol to polyether polyol of 0.25-2.7:1. A polyurethane-urea elastomer having good dynamic properties can be prepared by reacting the isocyanate-terminated prepolymer with an aromatic amine chain extender at an equivalent ratio of 0.9-1.1:1.

Polyurethane prepolymers for making elastomers having improved dynamic

This invention pertains to alkyl substituted difunctional cyclohexylisocyanates having an isomer distribution. The isocyanates are represented by the formulas: ##STR1## wherein; R.sup.1 is C.sub.1-4 alkyl; R.sup.2 is C.sub.1-4 alkyl and

Alkyl substituted difunctional cyclohexylisocyanates

This invention relates to polyurethane coatings formed from prepolymers made by reacting polyisocyanates with long chain polyols having an average functionality of greater than 2. The resulting prepolymers have equivalent weights greater than about 250 grams per equivalent and preferably greater than about 350 grams per equivalent. An excess of polyisocyanate is reacted with the polyol component at an equivalent ratio of greater than 4:1 equivalents isocyanate per equivalent of polyol. Excess polyisocyanate is then removed from the prepolymer. The resulting polyurethane prepolymers are chain extended with compounds having active hydrogen atoms such as water, amines or short chain polyhydroxy compounds, e.g., diols to form the resulting coatings.

High performance polyurethane coating compositions and processes for

This invention relates to a polyisocyanate prepolymer for polyurethane and polyurethane/urea elastomer synthesis and to the resulting elastomer. The prepolymer is formed by reacting a cyclohexanediisocyanate with a long chain polyol under conditions such that essentially a 2:1 adduct is formed. Excess cyclohexanediisocyanate is removed prior to forming the elastomer.

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Kutztown, PA, United States of America

Jeffrey Raymond Quay