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Steel/polyurethane sandwich panel and its preparation method and application

A technology of polyurethane and sandwich panels, applied in chemical instruments and methods, lamination, layered products, etc., can solve the complex preparation process, few engineering fields of steel/polyurethane sandwich panels, and unresolved process problems, etc. problems, achieve high quality, optimize the production line, and avoid irregular deformation of the cavity

Active Publication Date: 2020-12-11
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, steel / polyurethane sandwich panels have rarely been used in the engineering field. The reason is that the traditional sandwich panel preparation process is relatively complicated, and many process problems have not been properly resolved.

Method used

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  • Steel/polyurethane sandwich panel and its preparation method and application
  • Steel/polyurethane sandwich panel and its preparation method and application
  • Steel/polyurethane sandwich panel and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The polyurethane core material includes by mass fraction: hard segment material diphenylmethane diisocyanate 30%, soft segment material polypropylene diol with a molecular weight of 400 62.7%, chain extender 1,4-butanediol 2%, catalyst dibutyltin diol Laurate 0.3% and curing agent 3,3'-dichloro-4,4'-diaminodiphenylmethane 5%.

[0032] The method that the present invention prepares steel / polyurethane sandwich plate comprises the steps:

[0033] (1) Polyurethane core material preparation: add diphenylmethane diisocyanate and polypropylene glycol to the reaction kettle, prepolymerize at 60°C and normal pressure for 2 hours to form a polyurethane prepolymer, put it into the pouring machine A barrel, Add 1,4-butanediol, dibutyltin dilaurate and 3,3'-dichloro-4,4'-diaminodiphenylmethane into the barrel of casting machine B, and mix at normal temperature and pressure to obtain a polyurethane core material;

[0034] (2) Cavity preparation: first, the upper and lower steel pan...

Embodiment 2

[0038] The polyurethane core material includes: 20% diphenylmethane diisocyanate as a hard segment material, 77.4% polypropylene glycol with a molecular weight of 400 as a soft segment material, 0.5% chain extender 1,4-butanediol, and dibutyltin diol as a catalyst. Laurate 0.1% and curing agent dimethylthiotoluenediamine 2%.

[0039] The method that the present invention prepares steel / polyurethane sandwich plate comprises the steps:

[0040](1) Polyurethane core material preparation: add diphenylmethane diisocyanate and polypropylene glycol to the reaction kettle, prepolymerize at 60°C and normal pressure for 2 hours to form a polyurethane prepolymer, put it into the pouring machine A barrel, Add 1,4-butanediol, dibutyltin dilaurate and dimethylthiotoluenediamine into the B barrel of the pouring machine, and mix at normal temperature and pressure to obtain a polyurethane core material;

[0041] (2) Cavity preparation: first, the upper and lower steel panels are treated, that...

Embodiment 3

[0045] The polyurethane core material includes by mass fraction: hard segment material diphenylmethane diisocyanate 50%, soft segment material polypropylene diol with a molecular weight of 400 47.4%, chain extender 1,4-butanediol 0.5%, catalyst dibutyltin diol Laurate 0.1% and curing agent dimethylthiotoluenediamine 2%.

[0046] The method that the present invention prepares steel / polyurethane sandwich plate comprises the steps:

[0047] (1) Polyurethane core material preparation: add diphenylmethane diisocyanate and polypropylene glycol to the reaction kettle, prepolymerize at 60°C and normal pressure for 2 hours to form a polyurethane prepolymer, put it into the pouring machine A barrel, Add 1,4-butanediol, dibutyltin dilaurate and dimethylthiotoluenediamine into the B barrel of the pouring machine, and mix at normal temperature and pressure to obtain a polyurethane core material;

[0048] (2) Cavity preparation: firstly, the upper steel panel and the lower steel panel are ...

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Abstract

The invention discloses a steel / polyurethane sandwich board and a preparation method and application thereof. The sandwich board comprises upper and lower steel face boards and a plurality of columnsarranged between the upper and lower steel face boards, wherein the upper and lower steel face boards are connected to form a boundary material with a central cavity and a peripheral sealed structure,and the central cavity is filled with a polyurethane core material; during preparation, after pre-treatment of the upper and lower steel face boards, the multiple columns are arranged between the upper and lower steel face boards, boundaries are arranged on the upper and lower steel face boards to form a cavity structure, then, a pouring hole is formed in one of the steel face boards, the polyurethane core material is poured into the cavity through the pouring hole, and then vulcanization is executed to obtain the sandwich board. The sandwich board is applied to hull boards. The sandwich board has higher specific stiffness and specific strength and a strong vibration damping effect; by adopting the preparation method of the sandwich board, a sandwich board production line can be optimized, the production efficiency of a factory can be improved, a construction period can be shortened, the economic benefit can be improved, and large-scale batched production can be achieved.

Description

technical field [0001] The invention belongs to the field of sandwich panel preparation, in particular to a steel / polyurethane sandwich panel and its preparation method and application. Background technique [0002] The sandwich panel structure is a composite material structure with a sandwich sandwiched between two panels. It is widely used in aerospace, shipbuilding, civil engineering and other fields. It has become a modern focus of scientific research. There are many new types of sandwich panel structures, such as corrugated panels, honeycomb panels, grid core materials, lattice materials, nanomaterials, three-dimensional truss sandwich structures, etc. [0003] Polyurethane elastomer is a relatively special variety of polyurethane synthetic materials. Its structure is composed of soft segment polyol and hard segment isocyanate. By changing the type and proportion of soft and hard segments, the required physical state and mechanical properties can be obtained. , which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B3/08B32B3/24B32B15/01B32B1/06B32B37/00B32B38/04B32B38/00
CPCB32B3/08B32B3/266B32B15/011B32B37/00B32B38/00B32B38/04B32B2038/042B32B2307/56
Inventor 沈超明陈映刘昆张海燕谭坤陈豪杰王金友
Owner JIANGSU UNIV OF SCI & TECH
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