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Premixed polyether polyol, polyisocyanurate foam, as well as raw material composition and preparation method of polyisocyanurate foam

A technology of polyisocyanurate and combined polyether, which is applied in the field of combined polyether, polyisocyanurate foam and its raw material composition and preparation, can solve the problem of polyisocyanurate foam flame retardancy and Poor environmental protection and other problems, to achieve excellent flame retardant performance, the effect of small foam smoke production

Active Publication Date: 2016-04-06
SHANGHAI DONGDA POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a combination of polyether, polyisocyanurate foam and Its raw material composition and preparation method

Method used

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  • Premixed polyether polyol, polyisocyanurate foam, as well as raw material composition and preparation method of polyisocyanurate foam
  • Premixed polyether polyol, polyisocyanurate foam, as well as raw material composition and preparation method of polyisocyanurate foam
  • Premixed polyether polyol, polyisocyanurate foam, as well as raw material composition and preparation method of polyisocyanurate foam

Examples

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Effect test

Embodiment 1～ Embodiment 4

[0060] Embodiment 1~Example 4, comparative example 1 and comparative example 4

[0061] See Table 1 for the raw material formulations of Examples 1 to 4, Comparative Example 1 and Comparative Example 4 of the present invention, and see Table 2 for the effect data. Specific steps are as follows:

[0062] According to the formula in Table 1, add all ingredients except isocyanate into a stainless steel mixing tank, stir at room temperature at a speed of 10r / min for 1 hour, and discharge to obtain a combined polyether for polyisocyanurate foam.

[0063] According to the formula in Table 1, the prepared combined polyether and isocyanate PM200 are subjected to foaming reaction at 20°C according to the mass ratio, and injected into the mold to obtain a core density of about 40Kg / m 3 The rigid polyurethane foam insulation material, the physical properties of each embodiment and comparative example gained rigid polyurethane foam are shown in Table 2. " / " in Table 1 means no addition,...

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Abstract

The invention discloses premixed polyether polyol, polyisocyanurate foam, as well as a raw material composition and a preparation method of the polyisocyanurate foam. The premixed polyether polyol provided by the invention is prepared from the following components: polyether polyol A, polyester polyol A, a foam stabilizer, a trimer catalyzer, a foaming agent, water and a fire retardant; the foaming agent is a fluorinated hydrocarbon foaming agent; the fluorinated hydrocarbon foaming agent is 1,1,1,3,3-pentafluoropropane and / or 1,1,1,3,3-pentafluorobutane. Under the condition of not using an HCFC-141b foaming agent, the polyisocyanurate foam provided by the invention can reach the standards that the fire propagation index is less than or equal to 25 and the smoke increase index is less than or equal to 450, so that the polyisocyanurate foam provided by the invention meets the demands on inflaming retarding of thermal insulation materials used for high-rise buildings and corridors in National Fire Council Life Safety Act of America.

Description

technical field [0001] The invention specifically relates to a combined polyether, polyisocyanurate foam, raw material composition and preparation method thereof. Background technique [0002] Polyurethane foam is an organic polymer material and is a flammable material. Once it catches fire, due to its large surface area and low thermal conductivity, the material is easy to burn and not easy to self-extinguish. In order to achieve the ideal flame retardancy of foamed plastics, in addition to adding a flame retardant, it is also necessary to modify the amino structure into a urea-based structure, so that the molecular structure of the foam is modified from polyurethane to polyisocyanurate. At present, most of the polyisocyanurates produced in China use HCFC-141b as the physical blowing agent, and at the same time add a large amount of flame retardant to achieve the purpose of flame retardancy; although the prepared foam has a higher oxygen index, However, its smoke growth in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/42C08G18/48C08J9/14C08K5/521C08G101/00
CPCC08G18/4018C08G18/42C08G18/48C08G18/7664C08J9/146C08J2203/142C08J2205/10C08J2375/06C08J2475/08C08K5/521C08G2110/0025C08G2110/005
Inventor 董建国信延垒王青林许景龙
Owner SHANGHAI DONGDA POLYURETHANE
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