Preparation method and application of spraying polyurethane semi-rigid foam

Abstract

The invention provides a preparation method and application of spraying polyurethane semi-rigid foam, and relates to the technical field of construction, in particular to sound isolation, sound absorbing and heat preservation technologies for buildings. After isocyanate and modified polyether polyol are mixed, the polyurethane semi-rigid foam is prepared through foaming and polymerization reactions by means of a high-pressure spraying machine. The spraying polyurethane semi-rigid foam prepared through the technology has the advantages of being low in heat transfer coefficient, good in sound isolation effect, low in water absorbing rate, good in elasticity and ductility and the like after forming, and can be used in the floor building and construction processes and wall building and construction processes.

Description

technical field [0001] The invention relates to the technical field of buildings, in particular to the sound insulation, sound absorption and heat preservation technologies of buildings. Background technique [0002] According to the "Green Building Evaluation Standard" GB50378 and "Jiangsu Green Building Design Standard" DGJ32 / J173, the acceptance of indoor environment is clearly regulated in relevant chapters. Humidity, indoor noise level, air sound insulation performance of floors and partition walls, etc. According to the "Green Home Sound Insulation Design Code" GB50118 Appendix DGJ32 / TJ194 and the "Civil Building Sound Insulation Design Code" GB50118 Appendix A, the indoor noise level is tested in the room, and the selection distance is from water pumps, air-conditioning units, elevators, outdoor main roads and other noises The test of airborne sound insulation performance of the nearest room and household wall (between rooms) is carried out in accordance with GB / T198...

AI Technical Summary

Problems solved by technology

[0004] 1. The sound insulation / sound-absorbing pad is a block material, which requires manual transportation, paving and construction, which consumes man-hours;

[0005] 2. Most of the sound insulation / sound-absorbing pads are water-absorbing materials, such as sound-proof cotton, sound-proof plastic foam and other open-cell materials. When the cement mortar layer is made on it, a large amount of cement slurry will be absorbed and solidified, and the sound-proof / sound-absorbing effect will be lost;

[0006] 3. The thermal conductivity of the sound insulation / sound-absorbing pad is high, and the heat preservation effect is poor. While making the sound insulation pad, it is also necessary to make an insulation layer

Some insulation materials require thicker insulation materials for the same insulation effect