Rohm and Haas Company

John G Brodnyan

William D Emmons

Shang-Jaw Chiou

Robert A Gill

Vincent J Moser

Donald Francis Holloway

Walter G De Witt, Iii

Norman Shachat

Mark P De Grandpre

Stanley Le Sota

Gary D Stelling

Multi-stage polymer process and composition having an alkali-insoluble emulsion polymer and an alkali-soluble polymer are produced by a two-stage sequential emulsion polymerization process. When the multi-stage polymers of this invention are utilized as cement modifiers, improvements in cement mortar physical properties are realized.

Multi-stage polymer latex cement modifier and process of making

This invention concerns a nonwoven fabric particularly adapted for use as a diaper coverstock. The fabric consists essentially of fibers and a binder wherein at least 50%, by weight, of the fibers are hydrophobic fibers. The binder comprises a water insoluble, hydrophobic, emulsion copolymer of ethylenically unsaturated monomers comprising (A) 1 to 8% by weight of a monoethylenically unsaturated carboxylic acid, or a mixture thereof, (B) 50 to 75% by weight of a C.sub.4 to C.sub.8 alkyl acrylate or a mixture thereof, and (C) 20 to 49% by weight of methyl methacrylate, styrene, .alpha.-methyl styrene or a mixture thereof. The fabric has sufficient wet tensile strength for use as a diaper coverstock.

Bonded nonwoven fabrics suitable for diaper coverstock

Crushed foam coated leather and leather-like materials characterized by excellent foam adherence, are prepared by flowing foamed compounded polymeric latices into contact with a leather or leather-like substrate and partially drying same, followed by compressive crushing of the dried foam, plating or embossing to achieve optimum adhesion, and further heating and curing to develop maximum physical properties.

Crushed foam coated leather and leather-like materials

The present invention is concerned with new and improved binders for the production of foamed or cellular articles which have a high degree of absorbency, and retain their bonded character as well as absorbency through numerous wash-dry cycles. The cellular articles are bonded by a novel self-cross-linking binder comprising a copolymer of (a) N-methylol-amine or -amide units, (b) sulfonic acid units which contain no basic nitrogen atoms or group, and (c) certain acrylic units of neutral but mildly hydrophilic character which contain no basic nitrogen atoms or group.

Highly absorbent copolymers and foamed articles having rewettability

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Langhorne, PA, United States of America

John G Brodnyan