Production technology of thermal-insulation PU (polyurethane) material capable of absorbing harmful gases

Abstract

The invention provides a production technology of a thermal-insulation PU (polyurethane) material capable of absorbing harmful gases. A formula (in parts by mass) and a technological process are as follows: 100 parts of polyalcohol, 0.1-1.0 part of silicone oil, 5-20 parts of a foaming agent, 3.0-5.0 parts of a tertiary amine catalyst and 1.0-3.0 parts of an organic tin catalyst are added to a reaction container A and evenly stirred at the high speed for use; 100-150 parts of PAPI (polyaryl polymethylene isocyanate) are added to a reaction container B, 2-20 parts of PAPI modified negative ion mineral powder are added after the reaction container B is heated to the temperature of 50 DEG C, and the mixture is stirred at the temperature of 100-120 DEG C for a reaction for 10-60 min for use; a component A and a component B are mixed and then stirred for a period of time, poured into a mold for foaming and cut into certain sizes after cured. Tests indicate that the absorptivity of the thermal-insulation PU material prepared with the technology to toxic and harmful gases is higher than 90%.

Description

technical field [0001] The invention belongs to the field of new building materials and the like, and in particular relates to a process for preparing a polyurethane thermal insulation material capable of absorbing harmful gases. Background technique [0002] With the strengthening of environmental protection and the popularization of the concept of energy saving and emission reduction, building insulation materials have begun to expand. Polyurethane thermal insulation materials are not only used for external wall insulation, but also for interior decoration. [0003] The irritating gases such as benzene, formaldehyde, ketone, ammonia volatilized from the decoration materials used in the interior decoration process, as well as the sour smell of leftovers in daily life, cigarettes and other harmful odors have seriously affected people's physical and mental health. For this reason, people adopt various methods to absorb toxic and harmful gases, such as the patent CN20131067171...

AI Technical Summary

Problems solved by technology

Especially in polyurethane thermal insulation materials, due to the existence of cells, if the combination of negative ion mineral powder and polyurethane is not good, it will easily lead to the collapse of the cells of polyurethane thermal insulation materials and the loss of mechanical properties of the material.