Biomass base structure flame retardant polyol and preparation method and application thereof

A structural flame-retardant, biomass-based technology, applied in the field of biomass-based structural flame-retardant polyurethane foam and its preparation, can solve the problems of complex synthesis process, general flame-retardant performance of polyurethane, and poor binding performance of lignin components and polyurethane. Achieve high reactivity, less catalyst consumption, excellent heat resistance and mechanical properties

Active Publication Date: 2014-04-09
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] There are not many patents on biomass-based flame-retardant polyurethane foam plastics, especially structural flame-retardant polyurethane foam plastics. The main method is to prepare polyols from biomass, and then add flame retardants to the formula to prepare flame-retardant polyurethane foam plastics. CN1543478A Disclosed is a method for preparing polyurethane from lignin, which comprises polycondensing a polyol solution containing ligninsulfonic acid or a partially neutralized salt thereof in a dissolved state with polyisocyanate, s

Method used

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  • Biomass base structure flame retardant polyol and preparation method and application thereof
  • Biomass base structure flame retardant polyol and preparation method and application thereof
  • Biomass base structure flame retardant polyol and preparation method and application thereof

Examples

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Example Embodiment

[0023] Example 4:

[0018] Add 302g of cardanol and 162g of 37% wt formaldehyde solution into the reactor and mix uniformly. The temperature is raised to 70°C, and 210g of diethanolamine is added dropwise. The dropping time is 1h. After dripping, react at 90°C for 3h, and continue heating to 110°C. Pressure dehydration. When the moisture content is ≤1.5%wt, 66g ethylene oxide and 87g propylene oxide are circulated for alkoxylation reaction. The reaction temperature is controlled at 120-130℃, and the pressure is controlled at 0.3-0.5MPa. After the oxides, react at constant temperature and pressure for 60 minutes at 120°C / 10 mmHg and evacuate for 30 minutes under reduced pressure to obtain a structured flame-retardant polyol with a hydroxyl value of 386 mg / g KOH and a viscosity of 2100 mPa·s at 25°C. Then, according to the preparation formula of the rigid polyurethane foam in Table 1, the combined polyol was obtained, stirred evenly, and then mixed with the isocyanate and stirred a...

Example Embodiment

[0019] Example 2:

[0020] Add 302g of cardanol, 60g of paraformaldehyde, and 30g of melamine into the reactor and mix uniformly. The temperature is raised to 70°C, and 210g of diethanolamine is added dropwise. The dropping time is 1h. After dripping, react at 90°C for 3h and continue to heat up to 110°C Dehydration under reduced pressure. When the moisture content is less than or equal to 1.5%wt, 80g ethylene oxide and 97g propylene oxide are circulated for alkoxylation reaction. The reaction temperature is controlled at 120-130℃, and the pressure is controlled at 0.3-0.5MPa. After epoxide, react at constant temperature and pressure for 60 minutes, and evacuate under reduced pressure for 30 minutes at 120℃ / 10mmHg to obtain structured flame-retardant polyol. Its hydroxyl value is 406 mg / g KOH, and its viscosity at 25°C is 5100 mPa·s. Then, according to the preparation formula of the rigid polyurethane foam in Table 1, the combined polyol was obtained, stirred evenly, and then mi...

Example Embodiment

[0021] Example 3:

[0022] Add 302g of cardanol, 243g of 37% wt formaldehyde solution, and 60g of melamine into the reactor and mix uniformly. The temperature is raised to 80℃, and 315g of diethanolamine is added dropwise. The addition time is 2h. After the dripping, the reaction is carried out at 100℃ for 4h, and the temperature is continued to 110 ℃, dehydration under reduced pressure, when the moisture content is ≤1.5%wt, 134g of ethylene oxide and 163g of propylene oxide are circulated for alkoxylation reaction, the reaction temperature is controlled at 120-130°C, and the pressure is controlled at 0.3-0.5MPa, After the epoxide is passed through, react at constant temperature and pressure for 60 minutes at 120°C / 10 mmHg and evacuate under reduced pressure for 30 minutes to obtain a structured flame-retardant polyol. Its hydroxyl value is 460 mg / g KOH, and its viscosity at 25°C is 8500 mPa·s. Then, according to the preparation formula of the rigid polyurethane foam in Table 1,...

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Abstract

The invention discloses biomass base structure flame retardant polyol and a preparation method and an application thereof. An intermediate is obtained by utilizing the Mannich reaction of biomass anacardol, diethanolamine, melamine or urea, and formaldehyde, and the biomass base structure flame retardant polyol can be prepared through further alkoxylation with epoxy ethane and epoxy propane, with a hydroxyl value of 200-500mg/gKOH, moisture being less than or equal to 1.0%, and viscosity of 2000-10000mPa.s (25 DEG C), and the biomass base structure flame retardant polyol is applied in polyurethane foam as a polyol component. According to the biomass base structure flame retardant polyol as well as the preparation method and the application, an intermediate process does not need separation, the cost is low, the process is easy, and the prepared polyurethane foam is good in flame retardance, has the advantages that a product does not drip liquid, the shape is kept, the smoke density is low and the like, and can be used in construction, heat preservation and some special fields.

Description

technical field [0001] The invention relates to a flame-retardant polyurethane foam with a biomass-based structure and a preparation method thereof, mainly relates to the preparation of a flame-retardant polyol with a biomass-based structure and its application in polyurethane foam as a polyol component, and is especially suitable for the preparation of a ring Preparation of flame retardant polyurethane spray insulation material with pentane foaming system. Background technique [0002] Polyurethane is a kind of high polymer containing carbamate group (-NHCOO-) in its molecular chain. With the different raw materials, additives and process conditions during synthesis, products with different properties can be synthesized, such as foam plastics, rubber, coatings, adhesives, elastic fibers, etc. Polyurethane foam is currently the best thermal insulation material in the world. Because developed countries such as Europe and the United States attach great importance to building ...

Claims

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Application Information

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IPC IPC(8): C08G65/28C08G18/50C08J9/14C08G101/00
Inventor 张猛周永红张立强
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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