Self-adhesive thermosetting expanded adhesive tape and preparation method thereof

Abstract

The invention provides a self-adhesive thermosetting expanded adhesive tape and a preparation method thereof. The expanded adhesive tape is prepared by the following steps: taking butadiene rubber and natural rubber as raw materials, then adding with a filling agent, a tackifier, a vulcanizing agent, an accelerating agent and a foaming agent, etc, mixing in an internal mixer by three mixing steps, then extruding with an extruder for obtaining rubber strips, then reeling with an automatic reeling device with isolation paper for forming disks for obtaining the adhesive tape. The tape uses a traditional method for tackifying physically, and also uses a chemical method for tackifying; by adding epoxy resin and curing agent with strong bonding ability to the product, the binding power of the product after being roasted is strong for the steel plate. The expanded adhesive tape of the invention is a molded adhesive tape, which is convenient to use and free in pollution, has bonding power for the steel plate and zinc-plated plate, and can resist the primary treating solution and electrophoretic solution; when roasting, the rubber is vulcanized and foamed, thus the steel plates on the two sides can be bonded, and the product can absorb sound and damp. The products can be widely applied to absorbing sound and damping for transports, such as automobile and plane, etc.

Description

technical field [0001] The invention belongs to the field of foamed rubber molding adhesives of polymer materials, relates to shock-absorbing and sound-absorbing materials for vehicles such as automobiles, and is particularly suitable for shock-absorbing and sound-absorbing materials for heavy-duty vehicles such as trucks and buses. Background technique [0002] Guan Yongguang's patent application No. 97112074.9 "A Self-Adhesive Shock Absorbing Expansion Film" provides a method for producing foamed rubber molding adhesives for the first time in China. With the continuous improvement of production technology and process, this production process is increasingly showing defects and deficiencies. Because its production process is to use an open mill to press the tablet, then cut it into small pieces, then brush the pressure-sensitive adhesive on the surface, and dry it naturally. Self-adhesive rubber products must be very viscous, and it is very easy to stick to the two rollers...

AI Technical Summary

Problems solved by technology

Pressure-sensitive adhesives contain many volatile organic solvents, which cause great pollution to people and the environment

The product has strong self-adhesiveness only after applying the pressure-sensitive adhesive. If only one side is applied, the self-adhesiveness of the other side will be greatly reduced; if both sides of the product are applied with adhesive, it will affect the aesthetics of the product packaging; If the pressure-sensitive adhesive on the surface of the product is missing for various reasons, it will affect the self-adhesiveness of the product

In addition, the tackifier of this product only uses physical tackifiers instead of chemical methods to increase the cohesive force. This will inevitably cause the product to have low adhesion to the steel plate after baking, and it is easy to appear when the product cools and shrinks. colloid shedding phenomenon