Compositions – Magnetic – With wax – bitumen – resin – or gum
Patent
1989-01-30
1990-03-27
Cooper, Jack
Compositions
Magnetic
With wax, bitumen, resin, or gum
526209, 526287, H01F 126, C08F 226, C08F 2802
Patent
active
049118552
ABSTRACT:
An emulsion acrylate copolymer is provided which unexpectedly is an effective magnetic binder inasmuch as it can be loaded with high amounts of one or more magnetic particles such as ferrite or ferrite containing materials to provide a flexible permanent type magnetic composition of high magnetic energy. The copolymer is made from an alkyl acrylate and a salt of 2-acrylamido-2-methylpropane sulfonic acid (AMPS). A carboxylated ethoxy alkyl phenol surfactant is utilized which provides good processability and permits a blend of the magnetic particles with the emulsion acrylate copolymer to be precipitated from a latex solution by high shear mixing. Flexible high magnetic energy magnets can thus be made and utilized in various applications such as refrigerator doors, electrical motors, and the like.
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Gurganus Cecil R.
Mioduszeski John F.
Rasicci Vincent M.
Cooper Jack
GenCorp Inc.
Kalinchak Stephen G.
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