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Poly semicarbazide acid ester flame retardant foam plate and preparation method

A polyurethane and flame-retardant foam technology, which is applied in the field of flame-retardant foam boards, can solve the problems of polyurethane foam mechanical properties reduction, uneven cell structure, and foam modulus reduction, so as to improve molecular crosslinking density, Ensure overall uniformity and light weight effect

Active Publication Date: 2012-10-03
河北明润复合材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two types of flame retardants commonly used in the market today, inorganic and organic, but there are certain problems in the use of flame-retardant polyurethane foam materials.
For example, expanded graphite has a good flame retardant effect, but it will bring about the problem of increased thermal conductivity, which limits the application in insulation materials; another example is solid antimony trioxide, silicon-based, bromine-based, phosphorus-based flame retardants There must be a large amount of filling (generally more than 20%). The presence of these inorganic fillers greatly reduces the mechanical properties of polyurethane foam, and the cell structure is uneven, which limits the field of use; and the addition of organic liquid flame retardants has a negative effect on foaming. The impact of the process is not great, but it will play a plasticizing role, reducing the modulus of the foam, and with the increase of the amount added, the foaming time is obviously delayed

Method used

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  • Poly semicarbazide acid ester flame retardant foam plate and preparation method
  • Poly semicarbazide acid ester flame retardant foam plate and preparation method
  • Poly semicarbazide acid ester flame retardant foam plate and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 5.0Kg of MDI, 2.0Kg of hydroxyl-terminated polyethylene terephthalate with molecular weight of 400, 0.2g of chlorinated hydroxyl-terminated polybutadiene (molecular weight of 400, chlorine content of 20wt%), 8.6Kg of Put chlorinated paraffin, 0.4Kg of acetone, 0.6Kg of methyl acetate, and 0.6Kg of dichloromethane into a high-speed mixer, and mix at room temperature for 15 minutes; then add 0.7g of dibutyltin dilaurate and 1.5g of DMP- 30, and mix for 1 minute at room temperature to obtain a precursor slurry.

[0028] Add the precursor slurry into the single-screw extruder, and control the temperature of each section: the first section is 30°C, the second section is 100°C, the third section is 165°C, and the fourth section is 170°C.

[0029] The temperature control of each section of the die head is as follows: the first section is 125°C, the second section is 65°C, the third section is 40°C, and the fourth section is 25°C. Extrude to obtain a foam sheet.

[0030] The ...

Embodiment 2

[0032] 3.5Kg of MDI, 2.0Kg of hydroxyl-terminated polyethylene terephthalate with a molecular weight of 400, 0.5g of chlorinated hydroxyl-terminated polybutadiene (molecular weight of 1000, chlorine content of 20wt%), 8.0Kg of Put chlorinated polyethylene, 0.3Kg of acetone, 0.5Kg of methyl acetate, and 0.5Kg of methylene chloride into a high-speed mixer, and mix at room temperature for 15 minutes; then add 0.6g of zinc carboxylate and 1.2g of DMP-30 , mixed at room temperature for 1 minute to obtain a precursor slurry.

[0033] Put the precursor slurry into a sealed mold at 155°C, press at 20MPa, and after 20 minutes of molding, pass water to cool to 25°C and open the mold.

[0034] The extruded foam board was placed in an environment with a humidity of 85% and a temperature of 50° C. for post-curing reaction for 1 day. A polyurethane foam board was obtained.

Embodiment 3

[0036] 5.0Kg of MDI, 2.0Kg of polytetrahydrofuran diol with a molecular weight of 400, 0.2g of chlorinated hydroxyl-terminated polybutadiene (with a molecular weight of 400 and a chlorine content of 25wt%), 8.6Kg of polyvinyl chloride, and 0.4Kg of acetone , 0.6Kg of methyl acetate and 0.6Kg of dichloromethane were put into a high-speed mixer and mixed for 15 minutes at room temperature; then 0.7g of bismuth carboxylate and 1.5g of DMP-30 were added and mixed for 1 minute at room temperature to obtain a precursor slurry.

[0037]Add the precursor slurry into the single-screw extruder, and control the temperature of each section: the first section is 30°C, the second section is 100°C, the third section is 165°C, and the fourth section is 170°C. The temperature control of each section of the die head is as follows: the first section is 125°C, the second section is 65°C, the third section is 40°C, and the fourth section is 25°C. Extrude to obtain a foam sheet.

[0038] The extr...

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Abstract

The invention relates to a poly semicarbazide acid ester flame retardant foam plate and a preparation method and belongs to the technical field of flame retardant foam plates. A foam hole wall material comprises two components which are formed by interpenetration of polymer molecular chains, the first component is a poly semicarbazide acid ester crosslinking polymer, and the second component is chlorinated linear flame retardant polymer. The polyreaction of the polymer of the first component is synchronously completed by a poly semicarbazide acid ester precursor with plate forming, the second component is mixed and dispersed in the slurry of the poly semicarbazide acid ester precursor in advance, and a chlorinated hydroxyl-terminated polybutadiene interfacial compatibilizer is added to the mixed slurry. A mixed solvent is add to the mixed slurry and used as a hole forming agent and a cosolvent for the two polymers. The mixed slurry is processed by extrusion or mould pressing and moisture post-cure reaction. The prepared serial foam plate has the characteristics of high multiplying power, light weight, high thermal deformation temperature, low thermal conductivity, high strength, high modulus and V0 grade of flame retardance.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant foam boards, and in particular relates to a high-performance polyurethane flame-retardant foam board and a preparation method thereof. technical background [0002] Polyurethane foam has excellent electrical properties, acoustic properties and chemical corrosion resistance, and has strong adhesion to a variety of materials, so it is widely used as urban heating pipelines, petrochemical pipelines, refrigeration equipment, air-conditioned buses, etc. thermal insulation material. However, because polyurethane foam contains flammable hydrocarbon segments, coupled with structural characteristics such as low density and large specific surface area, it is easy to burn and decompose in case of fire, and produces a large amount of toxic smoke. Especially in recent years, with the in-depth popularization of the concept of building energy conservation in our country, the various excellent properties...

Claims

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Application Information

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IPC IPC(8): C08L75/06C08L75/08C08L91/06C08L23/28C08L27/06C08L27/08C08L31/04C08L47/00B29C47/92B29C43/58B29C48/92
Inventor 杜中杰邹威张晨励杭泉柳祚龙
Owner 河北明润复合材料科技有限公司
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