Anti-aging sealing rubber strip for building doors and windows and preparation method thereof

Abstract

The invention provides an anti-aging sealing rubber strip for building doors and windows and a preparation method thereof, and relates to the field of sealing materials. The anti-aging sealing rubberstrip comprises the following raw materials in parts by weight: 40-60 parts of p-phenylene silicone rubber, 30-40 parts of tin coupling type solution polymerized styrene-butadiene rubber, 30-40 partsof natural rubber, 1-3 parts of zinc methacrylate, 4-8 parts of liquid polyisoprene rubber, 1-1.8 parts of dioctyl sebacate, 10-20 parts of 774 carbon black, 10-20 parts of 550 carbon black, 2- 5 parts of nanometer magnesium hydroxide, 10-15 parts of asphalt-based chopped carbon fibers, 5-10 parts of polyvinylidene chloride, 1-3 parts of microcrystalline wax, 1-3 parts of stearic acid, 0.1-1.2 parts of maleic anhydride grafted ethylene propylene diene monomer, 1-1.5 parts of sulfur, 0.2-0.6 part of dicumyl peroxide, 0.5-1.5 parts of zinc dibutyl dithiocarbamate, 1-2 parts of accelerant, 1-5 parts of reinforcing component and 1.5-2.2 parts of anti-aging agent. The sealing rubber strip has excellent mechanical properties, and the related properties of the sealing rubber strip are slightly changed through a 100 DEG C and 300 h thermo-oxidative aging test and the sealing rubber strip has excellent thermal oxidation resistance and long service life.

Description

technical field [0001] The invention relates to the field of sealing materials, in particular to an aging-resistant sealing strip for building doors and windows and a preparation method thereof. Background technique [0002] Doors and windows are divided into enclosure components or partition components according to their positions, and have different design requirements to have functions such as heat preservation, heat insulation, sound insulation, waterproof, and fire prevention. The new requirement is energy saving. The lost heat accounts for about 25% of the total heating heat consumption. The airtight requirements of doors and windows is an important content in energy-saving design. Doors and windows are an important part of the building envelope system. Doors and windows are an important part of architectural modeling (contrast between virtual and real, and rhythmic artistic effect, play an important role), so their shape, size, proportion, arrangement, color, shape,...

AI Technical Summary

Problems solved by technology

The sealing strip material used in the market is generally modified by PVC. After a period of time, it is easy to age, and the aged sealing strip will lose its original softness and elasticity, become very hard, and age and shrink quickly. In this way, a large gap appears in the sealed part of the door and window, and the airtightness becomes poor, resulting in water leakage, dust leakage, etc., especially the steel lining inside the plastic steel door and window will be corroded quickly. There is a lot of red liquid flowing out of the bead inside, which means that the leaking steel lining of the door and window is corroded prematurely, and the life of the door and window will be greatly reduced. The price is also constantly rising, and the quality of the sealing strips produced by many small manufacturers is poor, and it is difficult to meet the sealing requirements

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