Preparing suspension of epoxy resin hardener and toughener

Details Preparing suspension of epoxy resin hardener and toughener Preparing suspension of epoxy resin hardener and toughener

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.

REFERENCES:
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patent: 4524107 (1985-06-01), Marchetti et al.
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patent: 4841010 (1989-06-01), Dodiuk
patent: 5075379 (1991-12-01), Storey et al.
patent: 5177122 (1993-01-01), Shih
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.

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