Bayer Corporation

Miles Inc.

Mobay Corporation

Michael F Hurley

David D Steppan

Bin Lee

Clifford J Lau

Gregory H Slocum

Donald W Schumacher

Robert G Eiben

William E Slack

Robson M Mafoti

Neil H Nodelman

Stephen J Harasin

Albert Magnotta

David F Sounik

Bruce H Potts

Timothy J Kelly

Kenneth J Naleppa

Wallace D Templin

Michael S Super

Terry D Seagraves

Torque tool

This invention relates to high performance RIM (reaction injection molded) poly(urethane)urea elastomers, and to a process for their production. These elastomers comprise the reaction product of an allophanate-modified diphenylmethane diisocyanate prepolymer having an NCO group content of about 5 to about 30%, with an isocyanate-reactive component comprising a high molecular weight amine-terminated polyether polyol, an aromatic diamine chain extender, and, optionally, a chain extender or crosslinker selected from the group consisting of aliphatic amine terminated polyether polyols and aliphatic hydroxyl terminated polyether polyols, optionally, in the presence of an internal mold release agent, a surfactant and a filler.

High performance RIM elastomers and a process for their production

A novel polyisocyanate which is liquid and room temperature stable and has an isocyanate group content of from 10 to 30% by weight is prepared by reacting:

Polyisocyanate based upon 4,4'-and 2,4'-diphenyl-methane dllsocyanates

A RIM process utilizing a reaction product of an MDI containing from 6 to 50% by weight of the 2,4'-isomer and a polypropylene glycol as the isocyanate reactant results in a molded product having excellent low temperature impact properties.

Rim process utilizing isocyanates based upon 2,4'- and

This invention relates to a reaction injection molding process for preparing a molded product by reaction of a mixture of

Process for the preparation of filled urethane-based reinforced moldings

Products made using the RIM process where the reaction mixture contains an acidic release agent have improved green strength when the reaction mixture also contains a peralkylated polyalkylene polyamine.

Stabilization of RIM systems containing acidic additives

It has been found that the use of specific expanded organic microspheres greatly improve the RIM process by (i) significantly enhancing the blowing action of air and/or nitrogen, (ii) providing for uniform density of the molded part, (iii) allowing for the reduction of internal mold pressures, (iv) substantially eliminating surface defects, (v) allowing for a significant reduction in density in the molded product, (vi) allowing for a substantial increase in the amount of air and/or nitrogen that can be dissolved in the isocyanate-reactive component, and (vii) significantly reducing shrinkage in the molded part.

Process for the production of reinforced moldings and the resultant

The mold broadly consists of an upper and lower mold part. The parts define a mold cavity when the mold is in the closed position. A channel is provided in one of the parts, with the channel completely surrounding the cavity. One upper edge of the channel forms at least a portion of the outer edge of the mold cavity. The channel is at least partially filled with an elastomeric material. A shear plate is attached to the other part in a location opposite the channel. When the mold is in the closed position, the shear plate enters the channel, presses against the elastomeric material and presses against the outer edge of the mold cavity. The shear plate is also provided with one or more tapered slots which allow gases to escape from the mold cavity when the mold is in the closed position.

Mold for the preparation of reinforced reaction injection molded products

The present invention is directed to a process for producing a molded product comprising

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Oakdale, PA, United States of America

Michael F Hurley