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Preparation method of aluminum hydroxide surface modified expansible graphite flame retardant and method for preparing flame-retardant polyurethane foam plastic by using the same

A technology of aluminum hydroxide and expanded graphite, applied in the field of flame retardant materials, can solve problems such as poor mechanical properties, achieve good flame retardant effect, save costs, and improve mechanical properties.

Inactive Publication Date: 2022-02-08
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing aluminum hydroxide flame retardant is more uniformly dispersed in the polyurethane foam, and the mechanical properties of the existing polyurethane foam are poor, and to provide aluminum hydroxide surface modified expandable graphite flame retardant Preparation method of flame-retardant and method for preparing flame-retardant polyurethane foam plastics by using it

Method used

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  • Preparation method of aluminum hydroxide surface modified expansible graphite flame retardant and method for preparing flame-retardant polyurethane foam plastic by using the same
  • Preparation method of aluminum hydroxide surface modified expansible graphite flame retardant and method for preparing flame-retardant polyurethane foam plastic by using the same
  • Preparation method of aluminum hydroxide surface modified expansible graphite flame retardant and method for preparing flame-retardant polyurethane foam plastic by using the same

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specific Embodiment approach 1

[0020] Specific Embodiment 1: This embodiment is a preparation method of an expandable graphite flame retardant modified on the surface of aluminum hydroxide, which is specifically completed in the following steps: using sodium hydroxide, aluminum hydroxide and expandable graphite as raw materials, using Aluminum hydroxide surface-modified expandable graphite flame retardant prepared by hydrothermal method.

specific Embodiment approach 2

[0021] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mass fraction of aluminum hydroxide in the aluminum hydroxide surface-modified expandable graphite flame retardant is 30% to 45%. Others are the same as the first embodiment.

specific Embodiment approach 3

[0022] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is: the specific operation process of the hydrothermal method is as follows: put expandable graphite and aluminum hydroxide into the reaction kettle, and then add a mixture with a pH of 11 Sodium hydroxide solution, stir and mix, cover the reaction kettle, heat up to 200-220°C, and react at a temperature of 200-220°C for 1.5h-2.5h, then cool to room temperature, the obtained solid-liquid mixture, Filtration, washing and vacuum drying are carried out successively to obtain the expandable graphite flame retardant with aluminum hydroxide surface modification. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of an aluminum hydroxide surface modified expansible graphite flame retardant and a method for preparing flame-retardant polyurethane foam plastic by using the same, belongs to the field of flame-retardant materials, and particularly relates to a preparation method of a modified expansible graphite flame retardant and a method for preparing flame-retardant polyurethane foam plastic by using the modified expansible graphite flame retardant. The invention aims to solve the problems that the existing aluminum hydroxide flame retardants are more uniformly dispersed in polyurethane foam, and the mechanical property of the existing polyurethane foam plastic is poorer. According to the preparation method, sodium hydroxide, aluminum hydroxide and expandable graphite are used as raw materials, and a hydrothermal method is adopted. The method for preparing the flame-retardant polyurethane foam plastic comprises the following steps: 1, weighing; 2, mixing; and 3, curing. The method has the advantages that the limit oxygen index can be increased to 28.5%; the compression strength is improved to 0.162 MPa, and the percentage of closed area is improved. The methods are mainly used for preparing the aluminum hydroxide surface modified expandable graphite flame retardant and flame-retardant polyurethane foam plastic.

Description

technical field [0001] The invention belongs to the field of flame-retardant materials, and in particular relates to a preparation method of a modified expandable graphite flame retardant and a method for preparing flame-retardant polyurethane foam plastics by using the same. Background technique [0002] At present, my country's building energy consumption has accounted for 1 / 3 of the total energy consumption of the whole society, and it is still growing at a rate of 1% per year. Building energy conservation has become a basic national policy of the country. my country's total construction area is about 40 billion square meters, and high-energy buildings account for more than 95%, which is the main reason for my country's high building energy consumption. Heat transfer through walls, pipes, roofs, etc. is the main way for buildings to consume energy. The thermal conductivity of rigid polyurethane foam is the lowest among all organic thermal insulation materials, and it has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/02C08K7/24C08K3/22C08G18/66C08G18/48C08G18/32C08G101/00
CPCC08K9/02C08K7/24C08K3/22C08G18/6688C08G18/48C08G18/3281C08K2003/2227C08G2110/0083
Inventor 丁明惠刘洪金詹帅李笑甜闫鹏伟王皓玄庞绍志张晨朱怀清
Owner HARBIN ENG UNIV
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