Morton International, Inc.

Toray Fine Chemicals Co., Ltd.

Steven John Hobbs

John Richard Gilmore

Keith Bradley Potts

Marc Edward Halpern

Michael J Hallisy

Warren G Duncan

Thomas Dennis Mundle

John W Nuber

A process is provided for the manufacture of liquid polysulfide polymers. In particular, the process allows for making the liquid form of the polysulfide polymer directly and eliminates the need to first make a solid polysulfide polymer and then convert it to a liquid.

Preparation of polysulfide compositions

Polysulfide-based polyurethane sealant for insulating glass

The moisture vapor transmission rates of sealants containing liquid polysulfides made from mixtures of a hexylene dihalide and a chloroethyl formal wherein the molar ratio is from about 1.5:1 to about 2.3:1 are extremely low. A preferred ratio is 0.64:0.36. The new liquid polysulfide is useful in conventional sealant formulations for insulated glass window units.

Polysulfide sealants with reduced moisture vapor transmission

Solid waste materials comprising oxidatively-cured, solid polysulfide sealants containing spent oxidant, fillers, plasticizers, and other formulating aids are reverted to a liquid sealant comprising mercaptan-terminated polysulfides by reducing them with a liquid mercaptan-terminated polysulfide at temperatures ranging from about 50.degree. to about 110.degree. C. Upon the addition of fresh curing agent and recuring, the reclaimed sealant has satisfactory tensile strength and elongation properties.

Process for recycling cured polysulfide sealants

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Woodstock, IL, United States of America

Steven John Hobbs