The Dow Chemical Company

Chester R Norman

Mary Anne Leugers

Shenghong A Dai

Stuart Farquharson

Joseph P Weller

David P Denton

Jean P Chauvel, Jr

Sandra V Lange

Hong-Anh Nguyen

Polycarbamates of a polyisocyanate and secondary alcohols are disclosed. These carbamates are characterized in being readily pyrolyzed to form the corresponding polyisocyanate and alcohol with low formation of tars and other by-products. Thus, these polycarbamates can be pyrolyzed under relatively mild conditions, and in the absence of solvent and catalyst.

Polycarbamates, process for preparing polycarbamates, and process for

A photometric probe or a photometric cell having separate windows and a metallic probe body or cell body. The window(s) are sealed to the probe or cell body by brazed or frit seals which are less likely to leak after extended use in high temperature and/or high pressure industrial applications than probes and cells having gasket sealed windows. The windows can be made of sapphire, cubic zirconia, diamond, ruby, glass or quartz and, in the case of the probe, can be in the shape of an Attenuated Total Reflectance prism. The probe or cell body can be Kovar alloy or stainless steel.

Photometric cell and probe having windows fusion sealed to a metallic

Growing community of inventors

Lake Jackson, TX, United States of America

Chester R Norman