A high flame retardant low density low temperature sensitive polyurethane slow rebound foam

Abstract

Highly-flame-retardant low-density low-thermosensitivity low-resilience polyurethane foam is disclosed. Raw materials comprise an A component and a B component, wherein the A component is isocyanate;the B component is 60-90% of b1, 5-15% of b2, 5-10% of b3, monohydric alcohol the weight of which is 1-10% of the total weight of polyols, water the weight of which is 3-4.5% of the total weight of the polyols, a catalyst the weight of which is 0.2-4% of the total weight of the polyols, and a foam stabilizer the weight of which is 0.2-3% of the total weight of the polyols; the b1, the b2 and the b3 are the polyols; the sum of the contents of the b1, the b2 and the b3 is 100; the b1 is a propylene oxide (PO)-ethylene oxide (EO) copolymerized polyol or a conjugate thereof, with the EO content being greater than 60%, the degree of functionality being 3 and the equivalent being greater than 1000; the b2 is a PO-EO copolymerized polyol or a conjugate thereof, with the PO content being greater than 90%, the degree of functionality being 2 and the equivalent being greater than 500; and the b3 is a polyester polyol with the degree of functionality being 2 and the equivalent being greater than500. The isocyanate index is 70-100%.

Description

technical field [0001] The invention belongs to the field of polyurethane, in particular to polyurethane slow rebound foam. Background technique [0002] Polyurethane slow-resilience foam is also called memory foam, viscoelastic foam, and low-resilience foam. After being stressed, it can conform to the shape of different parts, maximize the contact area with the force-applying object, minimize the stress gradient, and obtain the concentrated point of force. Relief, slow recovery when the external force is removed, the recovery time can range from a few seconds to tens of seconds. Therefore, slow rebound foam is widely used in various cushion materials, such as pillows, mattresses, lumbar pillows, neck protectors, earplugs, etc. Compared with traditional cushion materials, it can reduce the squeeze on the human body and is beneficial to blood circulation , with higher comfort. [0003] Since polyurethane slow rebound foam is a porous material with low density, large specifi...

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Problems solved by technology

[0004] The traditional method to improve the flame retardancy of polyurethane slow rebound is to add flame retardants, but the addition of flame retardants will lead to many problems such as excessive foam odor, poor storage stability of raw materials, and migration of flame retardants.

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