Application of graded lignin in preparation of phenolic foam thermal-insulation materials

A technology of phenolic foam and insulation materials, applied in the field of insulation materials, can solve problems such as poor effect, achieve the effects of reducing slag drop rate, saving acid and alkali consumption and high energy consumption, and increasing lignin substitution

Active Publication Date: 2018-05-01
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an application method of lignin in the preparation of phenolic foam insulation materials, so as to solve the problems of poor effect in the prior art

Method used

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  • Application of graded lignin in preparation of phenolic foam thermal-insulation materials
  • Application of graded lignin in preparation of phenolic foam thermal-insulation materials
  • Application of graded lignin in preparation of phenolic foam thermal-insulation materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Weigh 100 parts by mass of a hair-forming phenolic resin, 10 parts by mass of lignin with a molecular weight of 1000-3000, and stir for 10 minutes at a speed of 8000 rpm in an ultra-high-speed disperser until the mixture is uniform. Add 6 parts by mass of Tween-80, 10 parts by mass of n-pentane, 14 parts by mass of curing agent (benzenesulfonic acid: phosphoric acid: water = 3:3:1), 20 parts by mass of aluminum hydroxide, and 6 parts by mass of polyethylene glycol 1 part, 500rpm mixed and stirred evenly, then introduced into the mold, cured at 80°C for 2h, and obtained a graded lignin-filled phenolic foam insulation material.

[0048] The various properties of the prepared graded lignin-filled phenolic foam insulation material are shown in Table 1.

Embodiment 2

[0050]Weigh 100 parts by mass of a hair-forming phenolic resin, 20 parts by mass of lignin with a molecular weight of 1000-3000, and stir for 10 minutes at a speed of 8000 rpm in an ultra-high-speed disperser until the mixture is uniform. Add 6 parts by mass of Tween-80, 8 parts by mass of n-pentane, 18 parts by mass of curing agent (benzenesulfonic acid: phosphoric acid: water = 4:2:3), 20 parts by mass of aluminum hydroxide, and 5 parts by mass of polyethylene glycol 1 part, 500rpm mixed and stirred evenly, then introduced into the mold, cured at 80°C for 2h, and obtained a graded lignin-filled phenolic foam insulation material.

[0051] The various properties of the prepared graded lignin-filled phenolic foam insulation material are shown in Table 1.

Embodiment 3

[0053] Weigh 100 parts by mass of a hair-forming phenolic resin, 30 parts by mass of lignin with a molecular weight of 1000-3000, and stir for 10 minutes at a speed of 8000 rpm in an ultra-high-speed disperser until the mixture is uniform. Add 8 parts by mass of Tween-80, 10 parts by mass of n-pentane, 13 parts by mass of curing agent (p-toluenesulfonic acid: phosphoric acid: water=7:3:3), 20 parts by mass of aluminum hydroxide, toughening agent (poly Ethylene glycol: glycerol = 1:1) 10 parts by mass, mixed at 500 rpm evenly, then introduced into the mold, cured at 80°C for 2 hours, and obtained a graded lignin-filled phenolic foam insulation material.

[0054] The various properties of the prepared graded lignin-filled phenolic foam insulation material are shown in Table 1.

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Abstract

The invention discloses application of graded lignin in preparation of phenolic foam thermal-insulation materials. Compared with the prior art, the phenolic foam thermal-insulation materials are prepared by directly blending the graded lignin with foamable phenolic resin through control of the molecular weight of the graded lignin, so that tedious modification steps in a process for preparing phenolic resin from lignin are avoided, using amount of acids and alkalis is saved, and energy consumption in a modification process is reduced, and at the same time, the lignin content in the final phenolic foam thermal-insulation material products can be greatly improved, and the products are economical and more environmentally friendly. The phenolic foam thermal-insulation materials filled with thegraded lignin have better mechanical properties, thermal stability, anti-ultraviolet aging properties and better fineness, and the product quality meets national standards, and can meet a market demand.

Description

technical field [0001] The invention belongs to the field of thermal insulation materials, and in particular relates to the application of lignin in the preparation of phenolic foam thermal insulation materials. Background technique [0002] Phenolic foam is a new type of fire-resistant, fire-resistant and low-smoke thermal insulation material. It is a closed-cell rigid foam made of phenolic resin with flame retardant, smoke suppressant, foaming agent, curing agent and other additives. Its most prominent features are flame retardant, low smoke, and high temperature disparity resistance. It can be poured and foamed on site, can be molded, and can also be machined, and can be made into plates, tube shells and various special-shaped products. It overcomes the shortcomings of the original foam plastic insulation material, such as flammability, smoke, and heat deformation, and retains the characteristics of the original foam plastic insulation material, such as light weight and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/06C08L97/00C08J9/14C08H7/00
CPCC08H6/00C08J9/141C08J2203/14C08J2361/06C08J2497/00
Inventor 应汉杰邓彤朱晨杰唐成伦甘涛陈勇吴菁岚柳东沈涛蒋忠艳
Owner NANJING UNIV OF TECH
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