Low-temperature-resistant door/window sealing strip and preparation method thereof

Abstract

The invention discloses a low-temperature-resistant door / window sealing strip which is formed by mixing a component A and a component B in a mass ratio of 2:1. The component A comprises modified ethylene propylene diene monomer rubber, a filler, a coupling agent, a plasticizer, a vulcanizing agent, a softening agent and an activator. The component B comprises the following components in parts by mass: styrene-butadiene rubber, a filler, a chain extender and an antioxidant. The invention also discloses a preparation method of the low-temperature-resistant door / window sealing strip. The preparation method is simple to operate and easy to implement, and has the advantage of low cost. The door / window sealing strip has the advantages of favorable cold resistance, favorable heat resistance, favorable aging resistance, favorable sealing property and longer service life.

Description

technical field [0001] The invention relates to a sealing strip, in particular to a sealing strip on doors and windows and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] With the improvement of people's quality of life, the demand for living space also increases, among which the improvement of building quality requirements is particularly prominent; in the process of building doors and windows, the investment of sealing strips accounts for a small proportion, but its role is significant. It cannot be ignored that the key of doors and windows lies in sealing, among which the sealing strip plays a pivotal role; the sealing strip materials on the market are generally PVC modified, rubber, fiber, and fluff. Molecular plasticizers are easy to migrate to the surface of the product, resulting in poor elasticity of the sealing strip and hardening of the material, thereby affecting the sealing performance of doors a...

AI Technical Summary

Problems solved by technology

[0002]With the improvement of people's quality of life, the demand for living space also increases, and the improvement of building quality requirements is particularly prominent; in the process of building doors and windows Among them, the investment of sealing strips accounts for a small proportion, but its role cannot be ignored. The key to doors and windows lies in the sealing, in which the sealing strips play a pivotal role; the material of sealing strips on the market is generally modified by PVC, rubber As well as fibers and fluff, the small molecule plasticizer in the modified PVC is easy to migrate to the surface of the product, resulting in poor elasticity of the sealing strip and hardening of the material, thereby affecting the sealing performance of doors and windows; rubber sealing strips, In the rubber production process, there are weaknesses of high energy consumption and heavy pollution. After being used as sealing strips, some small molecule additives also have defects such as strong migration and poor elasticity, and are more harmful to the human body. Large, at present, the most common rubber type is EPDM (ethylene propylene diene monomer) sealing strip, although EPDM itself has good heat resistance

Chemical medium resistance, water resistance, etc., but as an organic polymer material, due to the combined effects of external environmental factors (such as light, heat, oxygen, and corrosive media, etc.) during use, it will cause changes in physical and mechanical properties. Gradually deteriorate until the final loss of use value, the surface is cracked, sticky, hardened, softened, powdered, discolored and moldy, etc., which will bring great inconvenience to people's normal life and office

[0003] However, the existing sealing strips of medium fiber and fluff are easy to absorb dust, have low strength, low elasticity, and poor sealing performance. Therefore, a kind of door and window that can overcome the above defects is developed. Sealing strips become a technical problem to be solved urgently by those skilled in the art