High-resilience foam material containing rich PAPI (polyaryl polymethylene isocyanate) polyurethane

Abstract

The invention relates to a high-resilience foam material containing rich PAPI (polyaryl polymethylene isocyanate) polyurethane, which is composed of a component A and a component B in a weight ratio of 100:(50-70). The component A is composed of 33-60% of polyether 330N, 33-60% of polymer polyalcohol, 0.5-1.5% of silicon oil, 0.2-0.8% of catalyst A33, 0.2-0.8% of catalyst A-1, 0.5-3.0% of diethanolamine, 3-10% of polyalcohol assistant and 2.5-6% of water. The component B is composed of 0-40% of toluene diisocyanate and 60-100% of polymethylene polyphenyl isocyanate. By using the raw materials containing multiple active hydrogens as an initiator and the polyalcohol prepared by polymerization reaction between the epoxypropane and epoxyethane at high temperature as a modifier, the foaming reaction sequence of the MDI (methylenediphenyl diisocyanate) base (PAPI) foam is regulated, so that the prepared foam mainly composed of MDI base (PAPI) has the advantages of high resilience, high foaming ratio, high elongation percentage and high tearing strength, and more importantly, has favorable tactile sensation.

Description

Technical field [0001] The present invention and the technical field of foam material production, in particular, refer to a high resilience foam material rich in PAPI polyurethane. Background technique [0002] Traditional polyurethane high resilience foams are mostly based on TDI, and their products have good mechanical properties, but the cost is high, which has a certain impact on the environment and occupational health and safety. Although MDI-based (PAPI)-based polyurethane high-resilience foam has cost advantages and contributes to the environment and occupational health and safety, its foaming ratio is low, rebound, elongation, tear strength is poor, and it is difficult to be low. Densification, so its technology needs to be improved. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide a PAPI-rich polyurethane high-resilient foam material with high foaming ratio, good resilience, high elongation and tear strength in v...

AI Technical Summary

Problems solved by technology

[0002] Traditional polyurethane high-resilience foam is mostly based on TDI, and its products have good mechanical properties, but the cost is high, and it has a certain impact on the environment and occupational health and safety.

Although MDI-based (PAPI)-based polyurethane high-resilience foam has cost advantages and contributes to the environment and occupational health and safety, it has a low expansion ratio, poor rebound, elongation, and tear strength and is difficult to reduce. Densification, so its technology still needs to be improved

Images