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Method of making polyurethane or polyisocyanurate foam block for insulating thick plates in storage tanks

A polyisocyanurate, polyurethane technology, used in bulk cargo, fixed-capacity gas storage tanks, mechanical equipment, etc., can solve problems such as unsatisfactory and uneven fiber content

Pending Publication Date: 2020-11-10
GAZTRANSPORT & TECHNIGAZ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Another problem lies in the production of foam blocks that are not wasteful, i.e. blocks that do not require cutting in order to obtain a homogeneous fiber-reinforced foam block, the loss of material associated with these cutting being generally about 15%, or even more than 20%, which in Totally unsatisfactory in industrial engineering
[0014] Therefore, at present, there is no preparation of low density (less than 50kg.m -3 ) method of fiber-reinforced polyurethane and / or polyisocyanurate foam blocks, by which blocks can be obtained with very good mechanical properties, mainly due to the inhomogeneous fiber content in the blocks

Method used

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  • Method of making polyurethane or polyisocyanurate foam block for insulating thick plates in storage tanks
  • Method of making polyurethane or polyisocyanurate foam block for insulating thick plates in storage tanks
  • Method of making polyurethane or polyisocyanurate foam block for insulating thick plates in storage tanks

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Embodiment Construction

[0130] Preferably, the fiber-reinforced PUR / PIR according to the invention is produced in the presence of a catalyst so that the isocyanate / polyol reaction can be accelerated. Such compounds are described, for example, in the prior art document entitled "Kunststoffhandbuch, Volume 7, Polyurethanes", 3rd Edition, 1993, Chapter 3.4.1, published by Carl Hanser. These compounds include amine-based catalysts and organic compound-based catalysts.

[0131] Preferably, the fiber-reinforced PUR / PIR according to the invention is prepared in the presence of one or more stabilizers intended to promote the formation of a regular cell structure during foam formation. These compounds are well known to those skilled in the art, and mention may be made, for example, of foam stabilizers comprising siloxanes such as siloxane-oxyalkylene copolymers and other organopolysiloxanes.

[0132] The person skilled in the art knows that the amount of stabilizer used is from 0.5% to 4% by weight of the PU...

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PUM

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Abstract

The invention relates to the production of a block of fibre-reinforced polyurethane / polyisocyanurate foam, in which the expansion of the foam is limited by the walls of a double-layer belt press forming a tunnel, the block of fibre-reinforced polyurethane / polyisocyanurate foam consisting of cells storing gas, in which the gas advantageously has a low thermal conductivity and the density of the foam block is less than 50 kg.m <-3>, wherein the content of the fibers Cf is at least 4 wt% of the fiber-reinforced foam block, and the impregnation time of the fibers ti is less than the emulsificationtime tc of the polyurethane / polyisocyanurate foam.

Description

technical field [0001] The subject of the present invention relates to a process for the preparation of blocks of fibrous polyurethane (PUR) and / or polyisocyanurate (PIR) foams (containing up to continuous fibers) using at least one polyisocyanate and at least one polyol, Said foam blocks are used in storage tanks integrated in type B or C supported or self-supporting structures for containing extremely cold fluids, known as cryogenic fluids, e.g. especially for liquefaction Natural gas (GNL) or liquefied petroleum gas (GPL). [0002] The invention also relates to fibre-reinforced PUR and / or PIR foam blocks which, in view of their specific application, must have very specific mechanical and thermal properties while being as cheap to produce as possible. [0003] Finally, the invention relates in particular to a hermetically sealed tank using foam directly obtained by this preparation method, and to a ship equipped with such a tank. Background technique [0004] PUR foam is...

Claims

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Application Information

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IPC IPC(8): C08G18/42C08G18/76C08L75/06B63B35/00C08J5/08C08J9/08F17C3/04
CPCC08G18/7664C08G18/4208C08L75/06C08G2330/00F17C2203/0358F17C2203/0333C08J2375/04C08J9/0085C08J9/0038C08J9/0095C08J9/141C08J2203/14B63B25/16C08G2110/005C08J9/04C08J9/125C08G18/14C08G2101/00C08J5/043C08J2203/10C08K5/0066C08K5/521
Inventor 纪尧姆·德孔巴略帕特里克·基茨曼莱蒂西亚·德沃夫
Owner GAZTRANSPORT & TECHNIGAZ