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A kind of composite polyether and the polyurethane sandwich panel made from it

A technology of polyurethane sandwich panel and combining polyether, which is applied in the direction of synthetic resin layered products, lamination and layered products, etc., can solve the problem of not uniform density distribution, high overall density of polyurethane sandwich panels, and insufficient production rate Advanced problems, to achieve the effect of improving market competitiveness, good dimensional stability, and improving production efficiency

Active Publication Date: 2017-04-19
SHANGHAI DONGDA CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the production rate of the existing continuous production mode of polyurethane sandwich panels is not high enough, the overall density of the produced polyurethane sandwich panels is high, and the density distribution is not uniform enough. Combination polyether for producing polyurethane sandwich panel and polyurethane sandwich panel made from it

Method used

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  • A kind of composite polyether and the polyurethane sandwich panel made from it
  • A kind of composite polyether and the polyurethane sandwich panel made from it
  • A kind of composite polyether and the polyurethane sandwich panel made from it

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Embodiment 1～5 and comparative example 1

[0058] Table 1 is the raw material formula table of the combined polyether of Examples 1-7, and Table 2 is the raw material formula table of the combined polyether of Comparative Example 1, and all values ​​in the table are parts by weight. In each example and comparative example 1, the components other than isocyanate were mixed evenly to obtain component A, and the isocyanate PM200 was component B.

[0059] Table 1

[0060]

[0061]

[0062] Table 2

[0063] Comparative example 1 Polyether polyol SU-450L 40 Polyether polyol 4110 40 Polyester polyol PS-3152 20 Surfactant B8532 2 h 2 o

1.5 Catalyst DMCHA 2.0 Catalyst PC-41 0.8 Catalyst BDMA 1.0 Flame retardant TCPP 25

[0064] Physical blowing agent HCFC-141b 24 Isocyanate PM200 203.2

[0065] Components other than isocyanate in Table 1 and Table 2 are stirred at room temperature in a stirred tank for 30-60min to obtain A comp...

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Abstract

The invention discloses premixed polyol and a polyurethane sandwich panel made of the premixed polyol. The premixed polyol comprises a component A and a component B, wherein the component A comprises, by weight, 10-20 parts of polyester polyol A, 40-60 parts of polyether polyol B, 20-50 parts of polyester polyol C, 1-2 parts of foam stabilizers, 0.5-1 part of opening agents, 2.5-4 parts of chemical foaming agents, 1-3 parts of first catalysts, 0.4-1 part of second catalysts, 0.6-1.5 parts of third catalysts, 35-50 parts of physical foaming agents and 20-30 parts of fire retardants; the component B comprises poly-phenyl polymethylene polyisocyanates. The polyurethane sandwich panel is made of the premixed polyol. The premixed polyol is used in a continuous production mode of the polyurethane sandwich panel, the production rate is high, the manufactured panel is low in overall density, the density distribution is even, the manufactured panel is fine and smooth in foam, free of cracking, good in size stability and excellent in thermal insulation property, and sound absorption and noise reduction are achieved.

Description

technical field [0001] The invention relates to a composite polyether and a polyurethane sandwich panel prepared therefrom. Background technique [0002] Polyurethane rigid foam is widely used in construction, transportation, refrigerator freezers, petrochemical pipelines, aviation military and many other aspects as heat insulation materials and structural materials. With the continuous development and advancement of the polyurethane rigid foam sheet business, the market demand for polyurethane rigid foam sheet composite materials is also increasing. [0003] At present, the board production methods are mainly divided into two types: intermittent and continuous. Due to the low production efficiency of intermittent boards and the high production efficiency of continuous production processes, more and more enterprises choose continuous production processes to produce polyurethane sandwich panels. With the promotion of the market, the application of polyurethane sandwich panel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/48C08G18/42C08J9/08C08J9/14
CPCB32B15/095B32B15/18B32B27/20B32B37/00B32B2038/0084B32B2266/0278B32B2307/102C08G18/4018C08G18/4804C08G18/4883C08G18/7664C08J9/08C08J9/146C08J2203/02C08J2203/142C08J2203/184C08J2203/204C08J2375/06C08J2375/08C08G2110/0025
Inventor 贾雪芹倪军许凤华邵静
Owner SHANGHAI DONGDA CHEM
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