A primer for difficult-to-adhesive materials and preparation method thereof

Abstract

The invention belongs to the technical field of high polymer material science, and discloses a primer for hard-bonding materials and a preparation method thereof. The primer disclosed by the invention comprises the following components in parts by weight: 16.2-48.3 parts of chlorinated polypropylene, 7.8-46.6 parts of organosilicon polymer, 2.3-44.5 parts of acrylate copolymer, 0.7-31.9 parts of titanate coupling agent, 14.2-161.3 parts of benzene solvent, 0.8-34.2 parts of quinoline, 3.2-113.1 parts of solvent and 0.9-9.4 parts of stabilizer. The preparation method of the primer comprises the following steps: mixing 16.2-48.3 parts of chlorinated polypropylene, 7.8-46.6 parts of organosilicon polymer, 2.3-44.5 parts of acrylate copolymer, 0.7-31.9 parts of titanate coupling agent, 14.2-161.3 parts of benzene solvent, 0.8-34.2 parts of quinoline, 3.2-113.1 parts of solvent and 0.9-9.4 parts of stabilizer, stirring for 1 hour, and carrying out evaporative reflux at 77-110 DEG C to regulate the solid content to 6-47%, thereby obtaining the primer. According to the primer disclosed by the invention, the organosilicon group is boldly introduced into the formula, and the organosilicon has many unique properties, such as high-low temperature resistance, weather resistance, aging resistance, electric insulation, ozone resistance, water repellence, flame resistance, physiological inertia and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a primer for difficult-to-adhesive materials and a preparation method thereof. Background technique [0002] Polyethylene (PE), polypropylene (PP) and other polyolefins, silicone rubber, polytetrafluoroethylene (PTFE) and other fluorine-containing polymer materials are difficult to bond with ordinary adhesives without special surface treatment. Such materials are often referred to as non-stick materials. Due to the excellent performance and low cost of polyolefin plastics, its films, sheets and various products are widely used in daily life. Fluoroplastics have important uses in some special fields because of their excellent chemical stability, excellent dielectric properties, extremely low coefficient of friction and self-lubrication. However, the inert chemical structure and high crystallinity of this type of material determine the low surface energy, non-polarity and...

AI Technical Summary

Problems solved by technology

However, the inert chemical structure and high crystallinity of this type of material determine the low surface energy, non-polarity and weak interfacial layer characteristics of its plastic products. It is difficult to bond with adhesives and conventional bonding methods to become a plastic product. A major challenge in manufacturing processing and applications

[0003] The existing conventional treatment agents for difficult-to-stick materials have complex production processes, most of which involve polymerization processes, and require high production equipment, which leads to high production costs

Moreover, its bonding effect on difficult-to-bond materials is not ideal

For example, the patent application number 200610035858.7 discloses a treatment agent for polypropylene and polyethylene, which mainly consists of chlorinated polypropylene, chlorinated rubber, toluene, butyl acrylate, styrene, maleic anhydride, and benzoyl peroxide. The formation of five-membered graft copolymers by free radicals is theoretically feasible, but the polymerization process requires a high level of operator, and it is difficult for ordinary people to do it

Therefore, it is difficult to promote it on a large scale in the actual production process.

Moreover, the patent has no specific data on how effective he is

[0004] The patent with the application number 200510038218.7 discloses a functional primer and its preparation method, which uses ethylene glycol-terephthalic acid-sebacic acid and other copolymers as the main adhesive resin, together with nitrocellulose, acrylic acid The mixed resin of the resin and ethylene glycol-terephthalate-sebacic acid-isoprene glycol copolymer is formulated into a glue with a mixed solvent, which does not involve complex processes such as synthesis, but this product is not suitable for Difficult to stick materials, which are mainly used for aluminum foil packaging materials

[0005] The preparation methods of these primers for the surface treatment of difficult-to-stick materials all have problems such as large equipment investment, high construction difficulty and safety, and the most important thing is that the bonding strength is not high.

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