Core-shell type ammonium polyphosphate synergetic flame-retardant polyurethane elastic composite material and preparation method thereof

A technology of polyurethane elasticity and ammonium polyphosphate, which is applied in the field of halogen-free intumescent flame retardant polyurethane elastomer, can solve problems such as poor water resistance, and achieve the effects of good compatibility, good water resistance, and low flame retardant efficiency improvement.

Active Publication Date: 2009-12-23
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a core-shell type ammonium polyphosphate synergistic flame retardant polyurethane elastic composite material and its preparation method, which can reduce the amount of flame retardant added while ensuring the flame retardant effect and has good droplet resistance, while improving The shortcomings of poor water resistance of flame retardant composites containing ammonium polyphosphate, enhance the compatibility of flame retardants and polyurethane elastomers, and improve the mechanical properties of materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 75% polyurethane elastomer (tensile strength 35.1Mpa), 25% polyurethane microcapsule ammonium polyphosphate is added in the banbury mixer by weight, melt blending 10 minutes under 170 ℃ and 100 rev / min rotating speed conditions, then The temperature is lowered to granulate, and the obtained elastic granules are the flame-retardant polyurethane composite material of the present invention.

[0014] The oxygen index of the flame-retardant polyurethane composite material was measured to be 33.5, reaching the V-0 level in the UL-94 test, and passing the UL-94V-0 test after soaking in water at 75°C for 7 days. The material has a tensile strength of 28.4MPa and an elongation at break of 690%. This shows that the material has excellent flame retardancy, water resistance and mechanical properties.

Embodiment 2

[0020] Add 95% polyurethane elastomer (tensile strength 35.1Mpa), 5% polyurethane microcapsule ammonium polyphosphate into internal mixer by weight, melt and blend for 10 minutes at 170°C and 100 rev / min rotating speed conditions, cool down Granulation, the obtained elastic particles are the flame-retardant polyurethane composite material of the present invention.

[0021] The oxygen index of the flame-retardant polyurethane composite material was measured to be 26, reaching the V-2 level in the UL-94 test, and passing the UL-94V-2 test after soaking in water at 75°C for 7 days. The tensile strength of the material can reach 32.7MPa, and the elongation at break is 890%.

Embodiment 3

[0023] Add 85% polyurethane elastomer (tensile strength 35.1Mpa), 15% polyurethane microcapsule ammonium polyphosphate into the internal mixer by weight, melt and blend for 10 minutes at 170°C and 100 rev / min rotating speed conditions, cool down Granulation, the obtained elastic particles are the flame-retardant polyurethane composite material of the present invention.

[0024] The oxygen index of the flame-retardant polyurethane composite material was measured to be 30.5, reaching the V-2 level in the UL-94 test, and passing the UL-94V-2 test after soaking in water at 75°C for 7 days. The material has a tensile strength of 30.4 MPa and an elongation at break of 800%.

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Abstract

The invention discloses a core-shell type ammonium polyphosphate synergetic flame-retardant polyurethane elastic composite material and a preparation method thereof, which is characterized in that the polyurethane elastic composite material containing core-shell type ammonium polyphosphate can be obtained by melting and co-mixing 75-94.9% of polyurethane, 5-25% of core-shell type ammonium polyphosphate and 0.1-5% of synergistic agent at the temperature of 160-220 DEG C for 5-30 minutes by weight percentage. The composite material can ensure that the adding amount of flame retardant is reduced while ensuring the flame retardance effect, and the composite material has good resistance of melt drip, simultaneously improves the shortcoming of poor water resistance of the flame-retardant composite material containing the ammonium polyphosphate, enhances the compatibility of the flame retardant and a polyurethane elastomer and improves the mechanical properties of the material, such as tensile strength, fracture strength and flame retardance performance, thereby meeting the requirements of fire protection safety and engineering applications.

Description

technical field [0001] The invention belongs to the technical field of halogen-free intumescent flame-retardant polyurethane elastomers, and in particular relates to a core-shell type ammonium polyphosphate synergistic flame-retardant polyurethane elastic composite material and a preparation method thereof. Background technique [0002] According to the introduction on pages 3-6 of the book "Polyurethane Elastomers and Their Applications" (Fu Mingyuan, Sun Hanjing, 2006, third edition, Chemical Industry Press), thermoplastic polyurethane is a compound between general rubber and plastics. Elastic materials, which have both the high strength of plastic and the high elasticity of rubber, large elongation, wide range of hardness, and excellent wear resistance, ozone resistance and radiation resistance, are widely used, accounting for about 100% of the world's total 15% of thermoplastic elastomer consumption. However, thermoplastic polyurethane is easy to burn. When burning, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K9/10C08K3/32
Inventor 胡源倪健雄宋磊赵魁敏
Owner UNIV OF SCI & TECH OF CHINA
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