A kind of mdi system highly breathable viscoelastic polyurethane foam and preparation method thereof

Abstract

The invention provides a highly breathable polyurethane foam prepared with MDI as a raw material. The reaction raw materials of the polyurethane foam include: A isocyanate component, B isocyanate reactive component, catalyst, surfactant, foaming agent; TDI ingredients, safe and environmentally friendly. The polyurethane foam has good open-cell air permeability, water permeability and suitable viscoelasticity, which makes the polyurethane foam keep dry and comfortable during daily use, and can be washed, cleaned and recycled. The present invention also provides a preparation method of the highly air-permeable viscoelastic polyurethane foam of the MDI system, which is simple and practicable.

Description

technical field [0001] The invention relates to an MDI system highly breathable viscoelastic polyurethane foam, in particular to a safe and environment-friendly polyurethane foam without TDI components, and a preparation method of the polyurethane foam. Background technique [0002] Due to its excellent chemical and physical properties, polyurethane foam with viscoelasticity is widely used in the field of household, such as the preparation of bedding, including mattresses, pillows and other products, and because of its slow rebound characteristics, it can be used in seat cushions, etc. , can increase user comfort. [0003] However, considering that traditional household products such as mattresses and pillows are not breathable, the heat generated by the human body cannot be discharged in time during long-term use. At the same time, the products are impervious to water, resulting in sweat accumulation, which is easy to breed bacteria, which affects users. experience and hea...

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Problems solved by technology

[0009] Patent CN201280046143.5 discloses a method for producing polyether foam with high air fluidity and the foam produced by this method. This patent solves the problem of foam opening, but the prepared viscoelastic foam is relatively large and cannot meet the requirements of mattresses. In addition, the technical solution of this patent also includes TDI as a raw material of polyurethane foam, and its use will cause harm to the human body and the environment

[0010] Patent CN201280068885.8 discloses a washable viscoelastic flexible polyurethane foam, which relates to a method for preparing an airflow value of at least 1dm 3 The method of the viscoelastic soft polyurethane foam of / s, find out by its technical scheme and embodiment, its foam air flow value is the highest be 2.4dm 3 / s, the foam air permeability produced by this method still cannot meet the foam air permeability requirements

[0011] Patent CN200880108314.6 discloses the manufacturing method of flexible polyurethane foam and thermoformed products and thermoformed products. The prepared foam still has the problem of insufficient air permeability. In addition, the technical solution of this patent also includes TDI as polyurethane Raw material of foam, the use of which can cause harm to human body and environment

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