Building sealing strip based on thermoplastic ethylene-propylene-diene monomer (EPDM) rubber material and preparation method of building sealing strip

Abstract

The invention discloses a building sealing strip based on a thermoplastic ethylene-propylene-diene monomer (EPDM) rubber material. The building sealing strip comprises the following components in part by weight: 30 to 50 parts of EPDM rubber, 15 to 40 parts of polypropylene, 2 to 10 parts of cycloalkane rubber oil, 2 to 10 parts of paraffin oil, 5 to 20 parts of phosphate, 2 to 10 parts of talcpowder, 5 to 20 parts of aluminum hydroxide, 0.2 to 1 part of antioxidant, 0.2 to 1 part of ultraviolet resisting agent, 0.5 to 2 parts of vulcanizing agent, 1 to 5 parts of auxiliary vulcanizing agent,5 to 10 parts of zinc borate, 2 to 5 parts of polytetrafluoroethylene powder and 0.5 to 5 parts of coloring agent. The other aim of the invention is to provide a preparation method of the building sealing strip based on the thermoplastic ethylene-propylene-diene monomer (EPDM) rubber material. The method comprises the following steps of: weighing raw materials, blending, reacting and extruding with a double-screw extruder, and plasticizing and extruding with a single-screw extruder. The performance requirements of the building sealing strip are met; and the building sealing strip has certain burning resistance, is low-smoke, halogen-free and environment-friendly, and can be recycled. The building sealing strip is suitable for a building door window curtain wall.

Description

technical field [0001] The invention relates to a building sealing strip based on a thermoplastic EPDM material and a preparation method thereof. Background technique [0002] At present, the sealing strip materials used in domestic building doors, windows and curtain walls are mainly polyvinyl chloride, thermosetting EPDM rubber, silicone rubber and thermoplastic elastomers, among which PVC and thermosetting EPDM rubber account for the vast majority. material. [0003] PVC sealing strips have defects such as poor aging performance, heat resistance, and non-environmental protection. After being assembled to building doors, windows and glass curtain walls for a certain number of years, they will age and crack under sunlight, and cannot achieve a good seal. effect. [0004] In the preparation process of EPDM sealing strips, it needs to go through banbury mixer and long oven vulcanization, gap production, complex process, long production process, high energy consumption, larg...

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Problems solved by technology

[0003] PVC sealing strips have defects such as poor aging performance, heat resistance, and non-environmental protection. After being assembled to building doors, windows and glass curtain walls for a certain number of years, they will age and crack under sunlight, and cannot achieve a good seal. effect

[0004] In the preparation process of EPDM sealing strips, it needs to go through banbury mixer and long oven vulcanization, gap production, complex process, long production process, high energy consumption, large equipment investment, and certain pollution to the environment. , waste rubber strips or replaced rubber strips cannot be recycled and directly reused. They are discarded and piled up outside like waste tires, forming "black pollution". Products, etc.

[0005] In addition, the sealing strip made of thermoplastic elastomer based on SBS and SEBS has good elasticity at room temperature, but at high temperature, the heat resistance and weather resistance are slightly poor, and the elasticity is also deviated, and there is a problem of easy aging, and it is not suitable for use outside buildings. Wall door and window curtain wall sealing strip

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