James E Kropp

US Patent:

41152956, Sep 19, 1978

Filed:

Apr 26, 1976

Appl. No.:

5/679940

Inventors:

Janis Robins - St. Paul MN
James E. Kropp - Maplewood MN
Chung I. Young - St. Paul MN

Assignee:

Minnesota Mining and Manufacturing Company - Saint Paul MN

International Classification:

C08G 5968

US Classification:

528 90

Abstract:

Two-part polymerizable compositions are described which contain (a) organic material having epoxide functionality, (b) organic material having hydroxyl functionality, and (c) a catalyst comprising highly fluorinated aliphatic sulfonyl protonic acid or a compound capable of liberating such acid. The compositions polymerize essentially completely at room temperature (or at slightly elevated temperatures). The polymerized compositions have desirable dielectric properties and are therefore especially useful for potting electrical components.

US Patent:

60137223, Jan 11, 2000

Filed:

Jan 27, 1998

Appl. No.:

9/013741

Inventors:

Jie Yang - Woodbury MN
Ying-Yuh Lu - Woodbury MN
James E. Kropp - Maplewood MN

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

C08L 3102
C08F22026

US Classification:

524558

Abstract:

Water resistant, low haze acrylic emulsion pressure sensitive adhesive compositions for use in decorative, light management or optical articles are disclosed. These emulsion pressure sensitive adhesives comprise (a) 50-90% by weight n-butyl acrylate, and (b) 10-50% by weight 2-hydroxy ethyl acrylate, or 2-hydroxy ethyl methacrylate, hydroxy propyl acrylate monomer, or mixtures thereof. These emulsion pressure sensitive adhesives can be used in wet lamination processes, and exhibit less than 2% increase in haze, less than 2% increase in opacity and greater than 95% transmittance after the wet lamination process.

US Patent:

43293964, May 11, 1982

Filed:

May 27, 1980

Appl. No.:

6/153183

Inventors:

James E. Kropp - Maplewood MN

Assignee:

Minnesota Mining and Manufacturing Company - Saint Paul MN

International Classification:

C09U 702
B32B 2718
B32B 1508

US Classification:

428354

Abstract:

The corrosion resistance of reflective or transparent-reflective sheet material comprising a vapor-deposited layer of aluminum or other corrodible metal on a polymeric foil backing is enhanced by incorporating a nickel organic ultraviolet light stabilizer in a layer which overlies the metal layer. The sheet material is especially adapted for use in energy control products, where it may be adhered to, or hung in front of, a windowpane.

US Patent:

42884934, Sep 8, 1981

Filed:

Jul 16, 1979

Appl. No.:

6/057584

Inventors:

James E. Kropp - Maplewood MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

C09J 702
B32B 1710

US Classification:

428350

Abstract:

Certain adhesive compositions which are soluble in organic solvents and insoluble in water but activatable thereby, are useful in adhering transparent polymeric foils (especially energy control sheets) to glass. The adhesives, which comprise a blend of (a) methyl vinyl ether:maleic anhydride copolymers or half esters thereof and (b) polyfunctional epoxide or aziridine crosslinker, impart excellent moisture-resistance to laminates.