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Strengthened and toughened modified urea-formaldehyde resin foam insulation material and preparation method thereof

A technology of urea-formaldehyde resin foam and thermal insulation materials, which is applied in the field of foam thermal insulation materials, can solve problems such as high brittleness, low strength, and easy to drop slag, and achieve the effects of improving compressive strength, good flame retardancy, and low cost

Active Publication Date: 2019-02-19
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly solves the technical problem that the existing urea-formaldehyde resin foam is limited in its use as a building insulation material due to its high brittleness, easy slag drop, and low strength, and provides a toughened modified urea-formaldehyde resin foam insulation material and a preparation method thereof

Method used

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  • Strengthened and toughened modified urea-formaldehyde resin foam insulation material and preparation method thereof
  • Strengthened and toughened modified urea-formaldehyde resin foam insulation material and preparation method thereof
  • Strengthened and toughened modified urea-formaldehyde resin foam insulation material and preparation method thereof

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specific Embodiment approach 1

[0038] Embodiment 1: The modified urea-formaldehyde resin foam insulation material in this embodiment is prepared from raw materials according to the following weight percentages:

[0039] Urea-formaldehyde resin: 91.24%; Foaming agent: 2.1%; Surfactant: 3.0%; Thickener: 0.46%; Curing agent: 1.2%; Modifier: 1.8%;

[0040] Wherein, surfactant is polyoxyethylene sorbitan monooleate (Tween-80); Thickener is: sodium carboxymethyl cellulose; Curing agent: mass fraction is 15% tartaric acid aqueous solution; Modified Agent: nano silicon dioxide.

[0041] The specific preparation method is as follows:

[0042] Step a. Stir urea-formaldehyde resin, n-hexane, and Tween-80 at room temperature at a speed of 300-400r / min until uniform (stirring takes 3-5min), then add nano-silica, and continue stirring for 3-5min , then add sodium carboxymethylcellulose, and then stir for 10 to 15 minutes at a stirring speed of 1400 to 1600 r / min; finally add tartaric acid solution, and continue stirrin...

specific Embodiment approach 2

[0051] Embodiment 2: The modified urea-formaldehyde resin foam insulation material in this embodiment is prepared from raw materials according to the following weight percentages:

[0052] Urea-formaldehyde resin: 89.7%; Foaming agent: 2.06%; Surfactant: 2.99%; Thickener: 0.45%; Curing agent: 1.2%; Modifier: 3.6%;

[0053] Wherein, surfactant is polyoxyethylene sorbitan monooleate (Tween-80); Thickener is: sodium carboxymethyl cellulose; Curing agent: mass fraction is 15% tartaric acid aqueous solution; Modified Agent: basalt fiber.

[0054] The specific preparation method is as follows:

[0055] Step a. Stir urea-formaldehyde resin, n-hexane, and Tween-80 at room temperature at a speed of 300-400 r / min until uniform (stirring takes 3-5 minutes), then add basalt fiber, continue stirring for 3-5 minutes, and then Add sodium carboxymethyl cellulose, and then stir for 10-15 minutes at a stirring speed of 1400-1600 r / min; finally add tartaric acid solution, and continue stirring...

specific Embodiment approach 3

[0064] Specific embodiment three: The modified urea-formaldehyde resin foam insulation material in this embodiment is prepared from raw materials according to the following weight percentages:

[0065] Urea-formaldehyde resin: 90.5%; Foaming agent: 2.08%; Surfactant: 3.02%; Thickener: 0.45%; Curing agent: 1.25%; Modifier: 2.7%;

[0066] Wherein, surfactant is polyoxyethylene sorbitan monooleate (Tween-80); Thickener is: sodium carboxymethyl cellulose; Curing agent: mass fraction is 15% tartaric acid aqueous solution; Modified Agent: polyvinyl acetate.

[0067] The specific preparation method is as follows:

[0068] Step a. Stir urea-formaldehyde resin, n-hexane, and Tween-80 at room temperature at a speed of 300-400r / min until uniform (stirring takes 3-5min), then add polyvinyl acetate, and continue stirring for 3-5min , then add sodium carboxymethylcellulose, and then stir for 10 to 15 minutes at a stirring speed of 1400 to 1600 r / min; finally add tartaric acid solution, an...

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Abstract

The invention discloses a strength / toughness-modified urea formaldehyde resin foam thermal-insulation material and a preparation method thereof. The urea formaldehyde resin foam material is prepared from the following raw materials in percentage by weight: 80-97% of urea formaldehyde resin, 0.1-3% parts of foaming agent, 0.5-4% of surfactant, 0.1-1% of thickener, 0.1-1.5% of curing agent and 0.1-10% of modifier. The urea formaldehyde resin is synthesized by a three-step method; and the modifier can be added in the urea formaldehyde resin synthesis and foam emulsion preparation process. By adopting the physical foaming method, the uniform and stable foam emulsion is firstly prepared, and then, the foam emulsion is freely expanded in an open container. The strength / toughness-modified urea formaldehyde resin foam thermal-insulation material has the advantages of simple technique, low cost, favorable flame retardancy, small heat conductivity coefficient and small fire hazard coefficient, and can be applied to the field of building thermal-insulation materials.

Description

technical field [0001] The invention belongs to the field of foam insulation materials, and in particular relates to a strengthening and toughening modified urea-formaldehyde resin foam insulation material and a preparation method thereof. Background technique [0002] At present, in the field of building insulation materials, the materials used more can be divided into inorganic insulation materials and organic insulation materials. Among them, inorganic thermal insulation materials have excellent characteristics such as flame retardancy, high temperature resistance, and corrosion resistance, but their thermal conductivity is large; while organic thermal insulation materials have the advantages of light weight and small thermal conductivity, but are flammable. Therefore, it is necessary to develop new insulation materials with excellent comprehensive performance. [0003] Urea-formaldehyde resin is a water-soluble resin, which is mostly used as an adhesive in the wood indu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L61/24C08L1/28C08L31/04C08K7/10C08K3/36C08J9/14C08G12/12
CPCC08G12/12C08J9/141C08J2361/24C08K2201/011C08L61/24C08L2201/02C08L2203/14C08L2205/03C08L2205/035C08L1/286C08L71/02C08K3/36C08K7/10C08L31/04C08L75/04
Inventor 张彦华沈运文顾继友谭海彦吕闪闪韦斌
Owner NORTHEAST FORESTRY UNIVERSITY
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