Natural plant oil based hydrophile low-resilience foam and preparation method thereof

Abstract

The invention discloses a natural plant oil based hydrophile low-resilience foam which is prepared from a composite and isocyanate, wherein the composite comprises the following components of 100 parts of pluronic polyols, 0-8 parts of cross-linking agent or chain extender, 0-3 parts of catalyst, 0-4 parts of foam stabilizing agent, 0.2-10 parts of foaming agent, 0-5 parts of interface activating agent and 60-100 parts of isocyanate index. A preparation method comprises the steps of: firstly, stirring uniformly the composite, and then adding the isocyanate according to the proportion; secondly, foaming in a die in a closed state to obtain molding foam, or freely foaming in a foaming tank; and cutting to obtain blocky foam after ageing. The regenerable natural plant oil polyalcohol is used in the invention and can be used in various isocyanate systems, and a metal catalyst can not be completely used, therefore, the environment is protected; and 100 parts of isocyanate index can be used, therefore, slow resilience effect and low residue are obtained. The low-resilience foam produced in the invention has the advantages of environment protection, high ventilation, better thermal diffusion and comfort and low temperature sensitivity.

Description

technical field [0001] The invention relates to a method for preparing natural vegetable oil-based hydrophilic slow-rebound foam, and belongs to the technical field of polyurethane foam preparation. Background technique [0002] As we all know, polyurethane slow rebound foam is called memory foam and viscoelastic foam. Its unique feature is that it can conform to the shape of the load, maximize the contact area, minimize the stress gradient, and obtain the concentrated point Relief, to achieve the distribution of force, no local squeeze and tingling. Therefore, slow rebound foam is widely used as pillows, mattresses, cushions, etc., which is beneficial to human blood circulation and is a high-comfort health care foam. [0003] At present, most of the polyols used in the production of polyurethane slow-rebound foam come from petrochemical products. However, as a non-renewable petroleum resource, there will always be a day when it will be exhausted. With the ups and downs of...

AI Technical Summary

Problems solved by technology

However, due to the insufficient amount of isocyanate, the residue of reactant

[0006] At the same time, the closed-cell problem is common in the process of preparing slow-rebound foam by traditional methods, which makes the side of the molded foam easy to crack when the mold is opened, and also causes the foam to shrink, affecting the appearance and yield of the foam

At the same time, the low opening rate leads to poor air permeability of the slow rebound foam, resulting in a stuffy effect; at the same time, the temperature sensitivity of the foam is high, and the low temperature becomes stiff

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