Additive for resins, process for its preparation and olefin resin composition using this additive
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United States of America Patent
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Apr 6, 1999
Grant Date -
N/A
app pub date -
May 22, 1997
filing date -
May 24, 1996
priority date (Note) -
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Abstract
An additive for resins, a process for preparing amorphous definite particles used as an inorganic additive, and an olefin resin composition blended with the additive, and an agricultural film blended with the additive and a lithium-aluminum composite hydroxide carbonate. The additive for resins comprises amorphous definite particles having (1) a molar ratio SiO.sub.2 /Al.sub.2 O.sub.3 of from 2.1 to 3.3 on the basis of oxides, (2) an average particle diameter of from 0.3 to 10 .mu.m, (3) a moisture regain at equilibrium (RH90%) of not greater than 10%, (4) a bulk density of from 0.5 to 1.2 g/ml, and (5) a pH in the form of an aqueous suspension of from 6 to 10, said amorphous definite particles being obtained by acid-treating and then heat-treating a Pc zeolite having a spherical particle shape, a notched surface and a molar ratio SiO.sub.2 /Al.sub.2 O.sub.3 of from 2 to 3.4 on the basis of oxides, and said amorphous definite particles further having substantially the same particulate structure as that of said Pc zeolite.
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