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Composition for reacting with isocyanate, rigid polyurethane sheet and preparation method thereof

A technology of isocyanate and composition, applied in the field of thermal insulation materials, can solve problems such as unsatisfactory long-term storage and limited use range, and achieve the effects of good dimensional stability, good surface quality and low thermal conductivity

Active Publication Date: 2022-07-08
南京红宝丽新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, this composition still cannot meet the requirements of long-term storage, which limits the scope of use of this composition

Method used

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  • Composition for reacting with isocyanate, rigid polyurethane sheet and preparation method thereof
  • Composition for reacting with isocyanate, rigid polyurethane sheet and preparation method thereof
  • Composition for reacting with isocyanate, rigid polyurethane sheet and preparation method thereof

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preparation example Construction

[0046] In the following embodiments, the steps of the preparation method of the rigid polyurethane sheet are as follows:

[0047] (1) Mix the first component of polyol, catalyst, syntactic foam stabilizer, water, and flame retardant uniformly in the container to obtain the first mixture; then add the second component of physical foaming agent and syntactic foam stabilizer in turn , fully mixed to obtain a composition, which is called component A; in the process of preparing component A, the temperature is controlled at 20-30 °C;

[0048] (2) Component A and Component B are respectively poured into the foaming machine material tank, fully mixed and poured on the surface layer material, and a rigid polyurethane sheet is obtained after lamination curing and curing;

[0049] Component B is polymethylene polyphenyl polyisocyanate.

[0050] Table 2 lists Component A, Component B, and mixing temperature for each example.

[0051] In the present embodiments, the surface layer materi...

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Abstract

The present application provides a composition for reacting with isocyanate, comprising a polyol, a catalyst, a physical blowing agent, a syntactic foam stabilizer, water and a flame retardant; the syntactic foam stabilizer has a first component, the first One component is a silicon-carbon bond type polyether siloxane terminated with at least one of an alkyl group or an acyl group; the physical blowing agent comprises cyclopentane. The present application also discloses a method for producing a rigid polyurethane sheet by using the above composition and polymethylene polyphenyl polyisocyanate and a rigid polyurethane sheet produced by the method. After the syntactic foam stabilizer is used, it has better stability due to effectively improving the surface tension of the composition. The produced rigid polyurethane sheet can effectively reduce the voids on the foam surface, and has the advantages of low thermal conductivity and good dimensional stability.

Description

technical field [0001] The invention relates to a composition for reacting with isocyanate, a rigid polyurethane sheet and a preparation method thereof, belonging to the field of thermal insulation materials. Background technique [0002] Among the hydrocarbon foaming agents, pentane isomers have been widely used in batch production lines such as refrigerators and container industries at home and abroad. With the advancement of the HCFC foaming agent phase-out plan, it has also been continuously It has been widely used on the production line of the method. Pentane foaming agent is a fluorine-free and environmentally friendly material with zero ODP value, low GWP value and production cost. In particular, cyclopentane combines many advantages of chemistry and physics, with low thermal conductivity, good fluidity and low price. , no health hazard, so it is currently recognized as a more suitable substitute for HCFC. Due to the characteristics of the production process and app...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/42C08G18/48C08G18/61C08J9/12C08J9/14C08L75/04C08G101/00
CPCC08G18/4208C08G18/48C08G18/4018C08G18/61C08J9/141C08J9/125C08J2203/14C08J2203/10C08J2203/182C08J2375/04C08J2205/10
Inventor 邢小刚孔超刘凯飞吴月辉夏淳元
Owner 南京红宝丽新材料有限公司
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