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Syntactic rigid PUR/PIR foam boardstock

A technology of rigid polyurethane and polyisocyanate, which is applied in the field of rigid polyurethane/polyisocyanate foam products and can solve the problems of undisclosed double-mesh foam and the like

Inactive Publication Date: 2002-07-24
BAYER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Harper does not disclose foams with a double mesh structure

Method used

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  • Syntactic rigid PUR/PIR foam boardstock
  • Syntactic rigid PUR/PIR foam boardstock
  • Syntactic rigid PUR/PIR foam boardstock

Examples

Experimental program
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Embodiment Construction

[0027] The present invention is directed to an improved rigid foam product comprising microspheres.

[0028] The hollow microspheres used here are known. Commercially available microspheres include Expancel 551 DE from Expancel Inc. Z-Light W-1000, provided by Zeelan Industries; Dualite M6032AE, provided by Pierce & Stevens Corporation; Scotchlite S-Series, provided by 3M Company; and QCEL300 and QCEL 650, provided by PQ Corporaion. Expancel and Dualite type microspheres, both are expandable and hollow microspheres, composed of a thin shell of 1,1-dichloroethylene and acrylonitrile copolymer, Z-Light W-1000 microspheres The shells of Scotchlite and QCEL are ceramic, while the microspheres of Scotchlite and QCEL are composed of glass shells. The microspheres of Expancel and Pierce & Stevens generally contain a volatile hydrocarbon inside. These microspheres can not only contain isobutane, isopentane or cyclohexane, but also can be made with conventional low boiling point solv...

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PUM

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Abstract

The present invention relates to the use of hollow microspheres filled with a hydrocarbon, to introduce uniform cell geometries in syntactic foams having a bimodal cell structure. The rigid foam product includes from 20 to 80 percent by weight of the hollow microspheres, the microspheres having average diameters ranging from 80 to 200 microns. The microspheres are encapsulated from 80 to 20 percent by weight of a closed cell polyurethane foam, the cells of the foam having average diameters from 0.01 to 40 microns.

Description

field of invention [0001] The present invention relates to a high compressive strength rigid polyurethane / polyisocyanate foam product including the use of microspheres, in particular, the foam is composite, closed cell, and double meshed. Background of the invention [0002] Rigid foams and their production processes are well known in this technical field, generally by reacting polyisocyanate with an isocyanate-reactive material such as polyol in the presence of a blowing agent. produced by the method. [0003] In recent years, the cost of basic raw materials used to produce foam plastics has increased significantly, which has promoted the development and application of filler materials to reduce the amount of basic raw materials and reduce the weight of final raw materials. An improved filling and insulating material utilizes hollow microspheres. [0004] The use of hollow microspheres in foamed plastics is known in this technical field. However, the application of micro...

Claims

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Application Information

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IPC IPC(8): C08J9/14C08J9/32C08K7/22C08K9/10C08L75/04
CPCC08J9/146C08J9/32C08J2375/04C08K7/22C08L75/04
Inventor K·G·斯皮特勒W·J·尼科拉C·E·霍尔辛格
Owner BAYER CORP
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