Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1979-09-24
1982-02-02
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
20415919, 20415915, 264 26, 264 453, 264 466, 264 467, 264 53, 521130, 521138, 521915, C08J 900
Patent
active
043140360
ABSTRACT:
A process for the production of foamed products from an unsaturated polyester resin composition, said composition comprising polyester resin, unsaturated monomer, a promotor, initiator, physical blowing agent, and compatible surfactant whereby a known gel time "T" results, foaming said composition by exposing it to microwave radiation prior to 1 T, thereafter permitting said foam structure to exotherm to obtain a fully cured product. Preferably the resin composition is exposed to the radiation between 0.2 and 0.7 T. Due to the foamed nature of these products, they will find many uses where insulation and light weight is important. End products include foamed unsaturated polyester resins and products incorporating the same such as patio blocks containing a polyester gel-coat, the gel-coat containing sand, decorative chips, or other decorative aggregate. The foam is a mixture of polyester resin and fillers and has a density of about 35 pounds per cubic foot. Another product is a roofing panel containing foam coated with a resin gel-coat with suitable additives for weather resistance, decorative texture, etc. The foam density is in the range of 13 pounds per cubic foot. Structural details can be added.
Another product disclosed is an architectural wall or curtain panel having a weather resistant exterior surface, an unsaturated polyester foam core, and a decorative or fire-resistant interior surface. After the foam is made, the lamination can take place as a subsequent operation.
Other products include profile shapes of the foam which can be produced by a continuous process to any desired shape such as a right angle structure.
Three dimensional shapes can also be prepared consisting solely of the polyester foam or with a coating.
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E. N. Doyle "The Development and Uses of Polyester Products", McGraw-Hill, Inc. (1969) pp. 90-95.
Graves, Jr. Richard E.
Throne James L.
Cochran Robert R.
Foelak Morton
Magidson William H.
McClain William T.
Standard Oil Company (Indiana)
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