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Preparation method of flame-retardant polyhydric alcohol and polyurethane foam and polyurethane sealant prepared from flame-retardant polyhydric alcohol

A technology of polyurethane sealant and flame retardant polyol, applied in the field of polyurethane foam and polyurethane sealant, can solve the problems of poor flame retardant performance of inorganic flame retardants, less application, affecting the mechanical properties of polyurethane sealants, etc. Wide application prospect and rich output effect

Active Publication Date: 2017-12-12
山东联创聚合物有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to adding inorganic flame retardants to polyurethane sealants, reactive flame retardants containing halogens are commonly used. The flame retardant performance of inorganic flame retardants is slightly poor. Adding too much will affect the mechanical properties of polyurethane sealants. Agents contain carcinogenic elements, and are less and less used in today's increasingly demanding environmental protection

Method used

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  • Preparation method of flame-retardant polyhydric alcohol and polyurethane foam and polyurethane sealant prepared from flame-retardant polyhydric alcohol
  • Preparation method of flame-retardant polyhydric alcohol and polyurethane foam and polyurethane sealant prepared from flame-retardant polyhydric alcohol
  • Preparation method of flame-retardant polyhydric alcohol and polyurethane foam and polyurethane sealant prepared from flame-retardant polyhydric alcohol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Weigh 127 parts by mass of melamine, 180 parts by mass of paraformaldehyde, 300 parts by mass of methanol, and 3 parts by mass of sodium hydroxide catalyst, heat up to a temperature of 70°C, and react for 2 hours. After the reaction is complete, add acid to adjust to pH=4 -5, add 198 parts by mass of tetrakis hydroxymethyl phosphorus chloride, react at 50°C for 3h, adjust to pH=8-10 with water and alkali catalyst, then add 900 parts by mass of castor oil, and reduce the temperature at 60-110°C Remove water and methanol under pressure, raise the temperature to 110°C to remove water and methanol under reduced pressure for 3 hours, reduce the water content to ≤0.5%, and filter with suction to obtain a light yellow transparent liquid.

[0044] Mix the bio-based castor oil flame retardant polyol and foaming agent evenly, then add amine catalyst or the mixture of amine catalyst and tin catalyst, polyurethane foam stabilizer, trimerization catalyst, water, and stir evenly to ob...

Embodiment 2

[0047] Weigh 152 parts by mass of melamine, 216 parts by mass of paraformaldehyde, 360 parts by mass of methanol, and 3.6 parts by mass of sodium hydroxide catalyst, heat up to a temperature of 72°C, and react for 2.5 hours. After the reaction is complete, add acid to adjust the pH to 4-5, add 237 parts by mass of tetrakis hydroxymethyl phosphorus chloride, react at 52°C for 3 hours, adjust to pH = 8-10 with water and alkali catalyst, then add 900 parts by mass of castor oil, at 60-110°C Remove water and methanol under reduced pressure, raise the temperature to 110° C., remove water and methanol under reduced pressure for 3 hours, reduce the water content to ≤0.5%, and filter with suction to obtain a light yellow transparent liquid.

[0048] Mix the bio-based castor oil flame retardant polyol and foaming agent evenly, then add amine catalyst or the mixture of amine catalyst and tin catalyst, polyurethane foam stabilizer, trimerization catalyst, water, and stir evenly to obtain ...

Embodiment 3

[0051] Weigh 177 parts by mass of melamine, 252 parts by mass of paraformaldehyde, 420 parts by mass of methanol, and 4.2 parts by mass of sodium hydroxide catalyst, heat up to a temperature of 74°C, and react for 2.5 hours. After the reaction is complete, add acid to adjust the pH= 4-5, add 277 parts by mass of tetrakis hydroxymethyl phosphorus chloride, react at 54°C for 3 hours, adjust to pH = 8-10 with water and alkali catalyst, then add 900 parts by mass of castor oil, at 60-110°C Remove water and methanol under reduced pressure, raise the temperature to 110° C., remove water and methanol under reduced pressure for 3 hours, reduce the water content to ≤0.5%, and filter with suction to obtain a light yellow transparent liquid.

[0052] Mix the bio-based castor oil flame retardant polyol and foaming agent evenly, then add amine catalyst or the mixture of amine catalyst and tin catalyst, polyurethane foam stabilizer, trimerization catalyst, water, and stir evenly to obtain co...

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Abstract

The invention belongs to the technical field of chemical synthesis, and particularly relates to a preparation method of flame-retardant polyhydric alcohol, and polyurethane foam and a polyurethane sealant prepared from flame-retardant polyhydric alcohol. The preparation method comprises the steps of heating melamine, paraformaldehyde, methanol and a basic catalyst for reaction to form a hydroxymethyl melamine mixture, adding acid into the hydroxymethyl melamine mixture to regulate a pH (potential of hydrogen), adding tetrakis hydroxymethyl phosphonium chloride for reaction, regulating the pH with water and the basic catalyst, then adding castor oil, performing pressure reduction to remove the water and methanol, reducing a water content to less than or equal to 0.5%, and performing suction filtration to form flame-retardant polyhydric alcohol. The method adopts a structure modification method; a cyclic structure containing flame-retardant elements P, N and melamine is added into a castor oil structure for synthesis of the flame-retardant rigid polyurethane foam and the flame-retardant polyurethane sealant; and flame-retardant polyhydric alcohol has higher flame retardancy.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a method for preparing a flame-retardant polyol and polyurethane foam and polyurethane sealant prepared therefrom. Background technique [0002] Castor oil is a natural hydroxyl-containing oil that can be used in polyurethane foam insulation materials, polyurethane sealants, polyurethane soles, and polyurethane elastomers. my country is rich in castor oil resources, and castor oil has attracted much attention for its renewable, non-toxic, degradable and environmentally friendly characteristics. In the situation of increasingly scarce petroleum resources, the production of polyols from renewable castor oil is an environmentally sustainable process. Polyurethane foam is currently the best insulating material in the world. However, polyurethane foam has a relatively small density and many porous structures. Compared with non-foam materials, it is easier to bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/38C09J175/14C08J9/14C08G101/00C08L75/14
CPCC08G18/36C08G18/3889C08G2101/00C08J9/141C08J9/142C08J9/144C08J2203/12C08J2203/14C08J2203/142C08J2375/14C09J175/14
Inventor 邵秀英张立强张鹏
Owner 山东联创聚合物有限公司
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