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Polyisocyanate combination and method for preparing rigid isocyanurate foam using the same

A technology of rigid polyurethane and polyisocyanate, which is applied in the field of polyisocyanate composition, can solve the problems of huge investment in equipment and increased manufacturing cost, and achieve the effect of low thermal conductivity and improved thermal conductivity

Active Publication Date: 2008-10-15
NIPPON POLYURETHANE IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the method (1) or (2) above, since the obtained isocyanate group-terminated prepolymer itself has a high viscosity, there are problems in that a high-performance mixing head is required in terms of equipment when obtaining a rigid polyurethane foam, Or, in order to obtain a good mixing state in the mixing head, it is necessary to heat the isocyanate group-terminated prepolymer to a temperature higher than necessary, etc., and the investment in equipment is huge or the manufacturing cost is increased.

Method used

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  • Polyisocyanate combination and method for preparing rigid isocyanurate foam using the same
  • Polyisocyanate combination and method for preparing rigid isocyanurate foam using the same
  • Polyisocyanate combination and method for preparing rigid isocyanurate foam using the same

Examples

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Embodiment

Embodiment a-1

Embodiment a-2～a-16 and comparative example a-1～a-8

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Abstract

The invention provides an isocyanate composite and a preparation method for scleroid polyurethane foam using the same. A preparation method for scleroid polyurethane foam using the hydrocarbon as the vesicant with independent bubbles; the scleroid polyurethane foam has a great storing stability, and the scleroid polyurethane foam can provide the heat conductive performance and great mechanical physical property (size stability and so on) for the scleroid polyurethane foam with the independent bubbles. The method uses the isocyanate composite composed by the polymerized MDI and alcohols with molecular weight less than 150 to prepare the scleroid polyurethane foam with the independent bubbles.

Description

Polyisocyanate composition and method for producing rigid polyurethane foam using same technical field The present invention relates to a polyisocyanate composition for producing a rigid polyurethane foam with closed cells, and a method for producing a rigid polyurethane foam with closed cells using the composition. More specifically, it relates to excellent foam properties with excellent low thermal conductivity and closed cells, and by using a low-viscosity polyisocyanate composition, the mixing property is sufficiently good even with a currently used mixing head. A method for producing rigid polyurethane foam with independent cells that ensures uniform fine cells. In addition, in the present invention, unless otherwise specified, "rigid polyurethane foam" includes the concept of "isocyanurate-modified polyurethane foam". In addition, "having closed cells" in the present invention means that the closed cell rate based on ASTMD2856 is 75% or more (including 75%). Backgrou...

Claims

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Application Information

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IPC IPC(8): C08G18/72C08G18/06C08J9/02C08K5/01
Inventor 菅野晶安斋俊之平田邦生
Owner NIPPON POLYURETHANE IND CO LTD
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