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US 6,472,460 B1Granted
Polymer composite material and process for preparing the same
AssigneeKabushiki Kaisha Toyota Chuo Kenkyusho
InventorsHirotaka Okamoto, Makoto Kato, Naoki Hasegawa, Arimitsu Usuki, Norio Sato
Life of this patent
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Abstract
Polymeric composites may be produced by a process comprising melt-kneading an organophilic clay and a polymer at an average reduced pressure of at 5×104 Pa, a maximum reduced pressure of at least 1×105 Pa, and a total shear strain between 105 and 107, and/or a total shear energy per unit volume falling between 1010 and 1014 Pa. Polymeric composites produced under these conditions may have 50% or more of the entire layers of the layered organophilic clay dispersed as monolayers.
Claims13
A method for producing a polymeric composite material comprising:
- melt-kneading an organophilic clay and a polymer so that the average value (P′ave) and the maximum value (P′max) of a reduced pressure on a kneaded material comprising the organophilic clay and polymer at one or more loading regions in a kneader are within the ranges shown below and that a total shear strain (A) and/or a total shear energy per unit volume (E) in all loading regions of the kneaded material are within the ranges of
- P′ave≧5×104(Pa),
- P′max≧1×105(Pa),
- 105≦A≦107, and
- 1010(Pa)≦E≦1014(Pa).
- wherein 50% or more of the entire layers of the layered organophilic clay are dispersed as monolayers.
3 more elements
Dependencies are inferred from the claim text.