Foaming type sealant for filling space

Abstract

The invention discloses a foaming sealant for space filling, which can improve the initial adhesion and the foaming rate. The foaming sealant comprises the following components by weight percentage: 25 to 30 weight percent of nitrile rubber, 10 to 15 weight percent of OBSH foaming agent, 15 to 20 weight percent of calcium carbonate filling agent, 20 to 30 weight percent of plasticizer, 1 to 5 weight percent of antiager, 5 to 10 weight percent of adhesion imparting agent, and 1 to 4 weight percent of vulcanizing agent. The foaming sealant improves the initial adhesion through the self-expansion phenomenon of the sealant, enlarges space filling force by improving the foaming rate, enlarges filling effect, and effectively improves the generation of noises during the driving of automobiles.

Description

technical field [0001] The invention relates to a foamed structural sealant mainly used in the field of automobile production for space filling. Background technique [0002] Structural sealant is a paste product with synthetic rubber as the main component. It is used for filling between the inner and outer panels of the car. It is cured after passing through the car oven. It is used for filling, pasting and vibration isolation. It is used according to the applicable part and purpose. Heat curing type product. Used in the welding process of various outer panels and inner panels, reinforced plates, anti-collision bars, etc., for the purpose of filling, pasting, and vibration isolation, and can be used on engine covers, car doors, trunk covers, etc. [0003] Originally, non-foaming structural sealant was used, which could not be completely filled according to the shape change of spraying when pasting the inner and outer panels, and the initial adhesion force to the oil-coated...

AI Technical Summary

Problems solved by technology

[0003] Originally used non-foaming structural sealant, which cannot be completely filled according to the shape change of spraying when pasting the inner and outer panels, and the initial adhesion force to the oil-faced steel plate is insufficient, causing shedding and detachment in the pre-treatment and electrophoresis processes

In addition, due to the insufficient initial adhesion to the oil surface steel plate, the phenomenon of interface peeling after curing can not be filled, noise, rust and other problems occur, and the volume becomes smaller and gaps appear after passing through the oven.

Images