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Hard-polyurethane-foam heat-insulating material

A technology of rigid polyurethane and thermal insulation materials, applied in the chemical industry, climate sustainability, sustainable manufacturing/processing, etc., can solve problems such as poor thermal insulation, flammability, and low performance, and achieve improved thermal insulation effect, performance-enhancing effects

Inactive Publication Date: 2019-12-20
厦门珉瑶贸易有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a thermal insulation material of rigid polyurethane foam, which solves the problems of the existing polyurethane foam material, such as low performance, poor thermal insulation and flammability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] An insulating material for rigid polyurethane foam, comprising experimental raw materials in proportions by weight: 30-35wt% phosphorus-containing polyol, 0.2-0.5wt% 1-azabicyclo[2.2.2]octane, 40 -45wt% 4,4-diphenylmethane diisocyanate, 0.1-0.2wt% N,N-dimethylcyclohexylamine, 1-2wt% diisopropylethylamine, 5-10wt% calcium phosphate, 3- 5wt% sodium carbonate aqueous solution, 5-10wt% lignin, phosphorus-containing polyol is obtained by transesterification of diethyl methylphosphonate and propylene glycol through 1-azabicyclo[2.2.2]octane as a catalyst, Lignin can replace part of phosphorus-containing polyols to prepare alkali lignin-based rigid polyurethane foams, and the thermal insulation of polyurethane foams can be improved by adjusting the weight ratio of lignin. Calcium phosphate can be added as a flame retardant to phosphorus-containing polyols. In the preparation of polyurethane foam with higher thermal insulation efficiency, diisopropylethylamine is used as a sili...

Embodiment 1

[0032] (1) Under nitrogen protection device, weigh 50g of diethyl methylphosphonate and add it into a 500mL three-neck flask, then add 80g of propylene glycol, and finally add 2g of 1-azabicyclo[2.2.2]octane as a catalyst, The reaction device was placed in an oil bath and heated to 180° C. and reacted for 6 hours. The reaction solution was extracted under reduced pressure and washed to obtain a phosphorus-containing polyol as a product.

[0033] (2) Add 30wt% phosphorus-containing polyol and 40wt% 4,4-diphenylmethane diisocyanate in sequence to a 1000mL beaker, stir at a constant speed for 10min under a magnetic stirrer,

[0034] (3 Add 3wt% sodium carbonate aqueous solution and 1wt% diisopropylethylamine into the beaker in sequence, and stir at a constant speed.

[0035] (4) The catalyst 0.1wt% N,N-dimethylcyclohexylamine, 5wt% calcium phosphate and 5wt% lignin were sequentially added to the beaker.

[0036] (5) Quickly stir under a magnetic stirrer, observe the reaction, wh...

Embodiment 2

[0038] (1) Under nitrogen protection device, weigh 50g of diethyl methylphosphonate and add it into a 500mL three-neck flask, then add 80g of propylene glycol, and finally add 2g of 1-azabicyclo[2.2.2]octane as a catalyst, The reaction device was placed in an oil bath and heated to 180° C. and reacted for 6 hours. The reaction solution was extracted under reduced pressure and washed to obtain a phosphorus-containing polyol as a product.

[0039] (2) Add 30wt% phosphorus-containing polyol and 40wt% 4,4-diphenylmethane diisocyanate in sequence to a 1000mL beaker, stir at a constant speed for 10min under a magnetic stirrer,

[0040] (3 Add 5wt% sodium carbonate aqueous solution and 2wt% diisopropylethylamine into the beaker in sequence, and stir at a constant speed.

[0041] (4) The catalyst 0.2wt% N,N-dimethylcyclohexylamine, 5wt% calcium phosphate and 10wt% lignin were sequentially added to the beaker.

[0042] (5) Quickly stir under a magnetic stirrer, observe the reaction, w...

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Abstract

The invention relates to the technical field of preparation of polyurethane foam and discloses a hard-polyurethane-foam heat-insulating material. The hard-polyurethane-foam heat-insulating material comprises the following experiment raw materials: phosphorus-containing polyol, 1-azabicyclo[2.2.2]octane, 4,4-diphenylmethane diisocyanate, N,N-dimethyl cyclohexylamine, diisopropylethylamine, calciumphosphate, a sodium carbonate aqueous solution and lignin. According to the hard-polyurethane-foam heat-insulating material, a bipolymer is formed by the 4,4-diphenylmethane diisocyanate and the phosphorus-containing polyol and becomes a major component of the polyurethane foam material; the phosphorus-containing polyol is prepared from diethyl methylphosphonate and propylene glycol through an ester exchange reaction; compared with polyols, the phosphorus-containing polyol has the advantages that properties of polyurethane foam are enhanced, and the heat-insulating effect of the foam is improved; and the calcium phosphate serves as a high-melting-point flame retardant, and the heat-insulating effect of the lignin based polyurethane foam is greatly improved through regulating and controlling the consumption of the calcium phosphate.

Description

technical field [0001] The invention relates to the technical field of polyurethane foam preparation, in particular to a thermal insulation material of rigid polyurethane foam. Background technique [0002] Thermal insulation material is a material that can block heat flow transfer, also known as thermal insulation material. Thermal insulation materials are divided into three categories: porous materials, heat reflective materials and vacuum materials, such as glass fiber, asbestos, rock wool, silicate, etc. , Aerogel felt, vacuum board, etc. [0003] Polyurethane is a type of high polymer obtained by the addition polymerization of organic polyisocyanates and polyhydroxy compounds. Polyurethane foam is an important category of polyurethane materials. However, most of the polyurethane foams prepared by the existing technology are prepared by polyols, which leads to the formation of foams. The performance is low, and the polyurethane foam is a flammable material, which will p...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/65C08G18/64C08G18/38C08K3/32C08J9/08C08G101/00
CPCC08G18/3878C08G18/6492C08G18/65C08G18/7671C08J9/08C08J2203/02C08K3/32C08K2003/325C08G2110/0025Y02P20/10
Inventor 马海龙郭臣唐阔海
Owner 厦门珉瑶贸易有限公司
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