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Energy management polyurethane rigid foams with high recovery

A technology of energy regulation and recovery rate, which is applied in the field of reaction systems for preparing them, and can solve problems such as damage to foam absorption energy, car owners not knowing, not being replaced, etc.

Inactive Publication Date: 2003-10-08
BAYER ANTWERPEN NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when replacing a door panel damaged in an accident, there is a good chance that the side pads, which are usually cast in place at the factory, were not replaced
Therefore, the repaired vehicle no longer meets safety requirements, which is unknown to the owner
Also, it must be emphasized that foam without a high recovery rate can be crushed even by relatively low impacts, compromising the foam's ability to absorb energy under severe impact

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-5， comparative Embodiment C1 and C2

[0050] Rigid, energy-absorbing foams are prepared by mixing the reacting ingredients together in a high-pressure mixing head or with a high-speed rotating agitator, introducing the entire stream of the mixture into a mold, and allowing the mixture to foam. Following thorough curing, test panels were cut from the center of the foam and tested for energy absorption properties as previously described.

[0051] In the following examples, polyol A is available from Lyondell Chemical Co. as Flexure TM 3000 Polymer Polyol Commercially available 43% solids, KOH catalyzed, glycerol initiated polyol with 20 wt% polyethylene oxide ends. The polymer solids were 63:67 styrene / polyacrylonitrile polymerized in situ. Polyol A, the base polyol having a hydroxyl number of 35.7, is a high molecular weight polyol of the present invention.

[0052] Polyol B is a polymer polyol containing about 21% in situ polymerized vinyl polymer solids and having a hydroxyl number of 245. Polyol B is availabl...

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Abstract

Energy absorbing rigid polyurethane foams have both high energy absorbing efficiency as well as exceptional recovery after deformation, allowing their use in visible energy absorbing structures, particularly in the transportation vehicle industry. The foams are prepared by reaction of one or more di-or polyisocyanates with a polyol component containing both high and low molecular weight polyols, and optionally chain extenders, crosslinkers, and other additives, wherein at least one polyol is a polymer polyol such that the total vinyl polymer solids content of the foam is greater than 15 weight percent.

Description

technical field [0001] The present invention relates to rigid polyurethane energy-regulating foams exhibiting high energy-regulating efficiencies and high recovery rates, and to reaction systems suitable for their preparation. Background technique [0002] Energy modulating foams are generally considered to be foams that compress upon impact to absorb large impact energies over a relatively long period of time. Such foams have become increasingly important in the passenger compartment of transportation vehicles and can be found in armrests, headrests, pillars, roof rails, instrument panels, knee pads, side pads, bumpers, and the like. Most of these parts are covered in vinyl, fabric or leather trim and are visible to passengers. [0003] Modulation energy, or EM, is the force (F) versus deflection to achieve the 40% compressibility limit EM = ∫ o d F ( x ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/63C08G18/40C08G18/48C08G18/62C08G101/00C08J9/08
CPCC08G2101/0058C08G18/4072C08G2101/0083C08G2101/00C08G2110/0058C08G2110/0083C08G18/40
Inventor M·J·佩里J·L·兰巴克F·E·克里奇菲尔德
Owner BAYER ANTWERPEN NV