Powdered elastomer dry blends and process for injection molding

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...

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523201, 523215, 523216, 523333, 524313, 524426, 524447, 524448, 524451, 524456, 524496, 524529, 524534, 524535, C08K 304, C08K 334, C08K 912, C08K 904

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045993700

ABSTRACT:
A powdered elastomeric composition is formed by combining a powder elastomer and a powdered predispersion of liquid or pasty components, such as process oil, lubricants and waxes, in a dry powder filler. The powdered predispersion is combined with the powder elastomer using a ribbon blender to form a consistent homogenous powder dry blend which can be directly injection molded without any additional mixing other than that occurring in the extruder portion of the injection molding apparatus.

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Derwent Abstract 35384C/20 J55045778(3-80) Matsushita.
Derwent Abstract 08553B/05 J53143633(12-78) Yamauchi Gum Kogyo.
Derwent Abst. 51739B/28 J54069164 (6-79) Asahi Chem.

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