Nissan Motor Company Limited

Tama-tlo Corporation

Koichi Handa

Masao Nakajima

Tomohiro Ito

Yasuaki Kai

Takashi Seino

Takashi Sawaguchi

Tsuneo Sakauchi

Kenji Uesugi

Tadashi Ashida

Katsuhiko Suzuki

Shinkichi Torii

Shoichiro Yano

Takashi Takei

Masatoshi Chikazawa

Shozo Yamamoto

A resin composition of the present invention comprises a polymer having functional groups and a metal oxide surface modified to form functional groups at a surface of the metal oxide and dispersed uniformly in the polymer. The functional groups of the polymer and the functional groups of the metal oxide are ionically bondable to the metal oxide and the polymer, respectively, so that the polymer and the metal oxide are bonded by ionic bonds to each other.

Resin composition and its production process and uses

In making a peripheral joint between first and second metal panels such as, e.g., outer and inner panels of an automobile door by hemming the first panel after application of a rust preventive sealant, the sealant is used in a quantity in excess of just sufficiency for completely filling in gaps in the joint to ensure that the excess portion of the sealant is pressed out of the joint by the end of the hemming operation, and the press die member used in the hemming working is formed with a groove in its hemming surface such that the sealant pressed out of the joint is confined within a space defined by the groove and shaped in conformance with the shape of the groove so as to serve as an external seal which closely covers the edge of the hemmed marginal part of the first panel.

Method of making a rust preventive hemmed joint between two metal panels

Growing community of inventors

Kanagawa, Japan

Koichi Handa