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Modified polyurethane spraying composite material for cold insulation of ultralow temperature liquefied natural gas (LNG) storage tank and preparation method of composite material

A polyurethane, ultra-low temperature technology, used in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor dimensional stability of pore pressure difference materials, easy to produce shrinkage cracks, unable to ensure safety and normal use status, etc. The method is convenient and efficient, the effect of high pore pressure difference and dimensional stability, and excellent low temperature dimensional stability

Active Publication Date: 2014-04-09
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the conventional rigid polyurethane foam material can only be used for general tank insulation. When it is placed in a cryogenic environment, its pores have poor pressure resistance and material dimensional stability, and it is prone to shrinkage cracks, which cannot guarantee long-term safety. , normal use status

Method used

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  • Modified polyurethane spraying composite material for cold insulation of ultralow temperature liquefied natural gas (LNG) storage tank and preparation method of composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Preparation of component A, 200kg: Weigh polyether polyol A: 450L (Shandong Bluestar Dongda Company), 76kg, polyether polyol B: DZ102C (Shandong Zibo Nuoli Chemical Co., Ltd.), 20kg, special Polyester polyol: TE-B503 (produced by our company), 17kg, foam stabilizer A: B-8545 (Evonik), 1kg, foam stabilizer B: LK-443 (Air Chemical), 2kg, deionized Water, 1.1kg, catalyst selection N,N,N',N",N"-pentamethyldiethylenetriamine, triethylenediamine, 1,3,5-tris(dimethylaminopropyl)- Mixture of hexahydrotriazine and dibutyltin dilaurate, weighing 1.5kg, 0.8kg, 0.4kg and 0.2kg respectively, physical blowing agent monofluorodichloroethane (141b), 40kg, flame retardant TCPP, 36kg , green pulp, 4kg.

[0030] The weighed polyether polyol A, polyether polyol B, special polyester polyol, foam stabilizer A, foam stabilizer B, chemical foaming agent, catalyst, flame retardant, physical foaming agent and others Add additives to the reaction kettle in turn, stir at room temperature for ...

Embodiment 2

[0034] 1. Prepare component A, 200kg: Weigh polyether polyol A: 450L (Shandong Bluestar Dongda Company), 60kg, polyether polyol B: DZ102C (Shandong Zibo Nuoli Chemical Co., Ltd.), 36kg, special Polyester polyol: TE-B503 (produced by our company), 20kg, foam stabilizer A: B-8545 (Evonik), 1kg, foam stabilizer B: LK-443 (Air Chemical), 2kg, deionized Water, 2kg, catalyst selection N,N,N',N",N"-pentamethyldiethylenetriamine, 1,3,5-tris(dimethylaminopropyl)-hexahydrotriazine and di Mixture of dibutyltin laurate, weighing 1.6kg, 1.0kg and 0.4kg respectively, physical foaming agent monofluorodichloroethane (141b), 40kg, flame retardant APP (ammonium polyphosphate), 32kg, antioxidant , 1kg, green pulp, 3kg.

[0035] The weighed polyether polyol A, polyether polyol B, special polyester polyol, foam stabilizer A, foam stabilizer B, chemical foaming agent, catalyst, flame retardant, physical foaming agent and others Add additives to the reaction kettle in turn, stir at room temperatur...

Embodiment 3

[0039] 1. Preparation of component A, 200kg: Weigh polyether polyol A: 450L (Shandong Bluestar Dongda Company), 75kg, polyether polyol B: DZ102C (Shandong Zibo Nuoli Chemical Co., Ltd.), 35kg, special Polyester polyol: B503 (produced by our company), 20kg, foam stabilizer A: B8532 (Evonik), 1kg, foam stabilizer B: LK-443 (Air Chemical), 2kg, deionized water, 1.8kg , The catalyst is selected from N,N,N',N",N"-pentamethyldiethylenetriamine, triethylenediamine, 1,3,5-tris(dimethylaminopropyl)-hexahydrotriazine and dibutyltin dilaurate, the weights are 1.3kg, 1.1kg, 0.5kg and 0.1kg respectively, the physical foaming agent fluorodichloroethane (141b), 25kg, flame retardant TCPP20kg, flame retardant DMMP15kg, Antioxidant, 2.2kg.

[0040]The weighed polyether polyol A, polyether polyol B, special polyester polyol, foam stabilizer A, foam stabilizer B, chemical foaming agent, catalyst, flame retardant, physical foaming agent and others Add additives to the reaction kettle in turn, s...

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PUM

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Abstract

The invention relates to a modified polyurethane spraying composite material for cold insulation of an ultralow temperature liquefied natural gas (LNG) storage tank and a preparation method of the composite material. The composite material consists of a component A and a component B at a weight ratio of 1: (1-1.05), wherein the component A includes polyether glycol A, polyether glycol B, modified polyether glycol, a foam stabilizer A, a foam stabilizer B, a chemical foaming agent, a physical foaming agent, a catalyst, a fire retardant and other auxiliaries, and the component B is polymethenyl polyphenyl polyisocyanate; the preparation method comprises the steps of sequentially adding the ingredients of the component A in a reaction kettle, stirring for 0.5-1 hour at a high temperature for completely mixing; and uniformly mixing the component A and the component B at weight ratio of 1: (1-1.05) through a high-pressure spraying machine, atomizing and foaming so that foam is rapidly formed and ripened, thus obtaining a finished product. The foam prepared by the invention is quite strong in low-temperature size stability, and is free from contraction crack in a cryogenic environment, so as to guarantee a perfect cryogenic cold insulation effect; and the composite material is specifically applicable to cold insulation construction of the LNG storage tank.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a modified polyurethane spray coating composition used for cold storage of ultra-low temperature LNG storage tanks and a preparation method thereof. Background technique [0002] With the rapid development of liquefied natural gas (LNG) mining and application, cryogenic insulation of liquefied gas (+90°C—-196°C) storage tanks has become an urgent problem to be solved. At present, domestic LNG storage tanks mostly use expanded perlite vacuum cryogenic technology for cold insulation, and the volume of the tank is mostly 40m 3 Within the range, if a large-capacity cryogenic container is encountered, it is basically impossible to vacuumize. At the same time, because expanded perlite is easy to absorb moisture, once the vacuum of the insulation layer is broken, it is easy to form ice inside the insulation layer. Polyurethane sprayed hard foam products have excellent phy...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/42C08J9/08C08J9/14C09D175/06C09D175/08
CPCC08G18/4018C08G18/4804C08G18/4829C08G18/7664C08G2150/50C08G2150/60C08J9/08C08J9/144C08J2203/02C08J2203/142C08J2203/184C08J2375/06C08J2375/08C08G2110/0025C08G2110/005
Inventor 宁晓龙徐业峰李欣李明友马海晶
Owner SHANDONG INOV NEW MATERIALS CO LTD
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