Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1994-05-10
1995-06-20
Sellers, Robert E.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525113, 525114, 525502, 525529, 525530, 525531, C08L 5104, C08L 904, C08L 1302, C08L 6302
Patent
active
054261503
ABSTRACT:
A storage-stable suspension of an epoxy resin hardener and a toughener useful as a molding composition is prepared via a) the addition of an organic solvent to an aqueous emulsion of the toughener when using a water-sensitive hardener, such as a polycarboxylic anhydride, removing the water as an azeotrope by vacuum distillation, then adding the epoxy resin hardener and removing the residual solvent by vacuum distillation, or b) the addition of an aqueous emulsion of the toughener with or without an organic solvent to the epoxy resin hardener when using a water-insensitive hardener such as a polyamine, and removing the water and any organic solvent by vacuum distillation.
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Pottick, "Kraton.RTM. Rubber Modified Epoxy Blends", 34th International SAMPE Symposium, May 8-11, 1989, pp. 2243-2254.
Pottick, "Toughening of Epoxy Resins with Styrenic Block Copolymers", Article, pp. 26-31, Polym. Nater. Sci. Eng., vol. 63, 1990.
Preliminary Technical Bulletin-Shell Chemical Company, "Kraton.RTM. RP6543 Rubber for Toughening Epoxy Resins", Aug. 1989.
Eldin Sameer H.
Peyer Robert P.
Setiabudi Frans
Ciba-Geigy Corporation
Sellers Robert E.
Teoli, Jr. William A.
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