Soft polyurethane low-resilience foam and preparation thereof

A low-resilience and foam technology, applied in the field of aromatic isocyanate-based polyurethane low-resilience foam and its preparation, can solve the problem of expensive amine-terminated polypropylene oxide, difficulty in obtaining soft polyurethane low-resilience foam, and limited supply and other issues, to achieve the effect of a large range of formula components
CN101412798AActive Publication Date: 2009-04-22薛攀霆
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
薛攀霆
Publication Date
2009-04-22

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Abstract

The invention relates to novel soft polyurethane foam with low elastic resilience. The soft polyurethane foam with low elastic resilience is a reaction product based on an isocyanate active ingredient and an isocyanate ingredient. The soft polyurethane foam with low elastic resilience is prepared by reaction of the following substances: (a) the isocyanate ingredient of aromatic isocyanate which does not contain isocyanate groups basically and is directly connected to aromatic rings; (b) an isocyanate active mixture; (c) a crosslinking agent; (d) catalyst; and (e) one substance or more substances of water, a surfactant and an additive. The isocyanate index of the soft polyurethane foam with low elastic resilience prepared by the method is between 75 and 105; the density is between 16 and 160 kilograms per cubic meter; and the rebound resilience of a falling sphere is lower than 15 percent.
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Description

technical field

[0001] The invention relates to an aromatic isocyanate-based polyurethane low-resilience foam whose aliphatic isocyanate and / or alicyclic isocyanate and / or isocyanate groups are not directly connected to an aromatic ring and a preparation method thereof. It also relates to reaction systems and specific isocyanate reactive component compositions that can be used in the process. Background technique

[0002] Soft, low-resilience polyurethane foams are characterized by slow, gradual recovery after compression and are commonly referred to as "slow rebound" foams, "viscoelastic" foams, "dead" foams, "high damping" foams, "shape memory" foams, or "Slow Reply" bubble. While most of its physical properties are similar to conventional polyurethane foams, low resilience foams have much lower resilience, typically less than about 15%.

[0003] Low resilience polyurethane foam has excellent impact resistance and excellent vibration damping. It also has shape adjustmen...

Claims

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