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A kind of polyurethane flame retardant film, preparation method and application thereof

A flame retardant film, polyurethane technology, used in transportation and packaging, removable outer jackets, vehicle parts, etc., can solve problems such as loss of flame retardant effect, and achieve the effect of avoiding migration, narrowing gaps, and increasing density

Active Publication Date: 2021-12-31
北京浦江兄弟科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similar to this kind of additive flame retardant method, its flame retardant properties can be guaranteed in the early stage of product use, but because additive flame retardants often have a plasticizing effect at the same time, in the long-term use process, additive flame retardants It will gradually migrate and precipitate from the surface, and the flame retardant effect will eventually be completely lost

Method used

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  • A kind of polyurethane flame retardant film, preparation method and application thereof
  • A kind of polyurethane flame retardant film, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of polyurethane flame retardant film, comprises the raw material of following weight part:

[0042] Aliphatic TPU particles: 86.6 parts by weight, hardness 80Shore A

[0043] Flame retardant crosslinking agent: 12 parts by weight

[0044] Antioxidant: composite antioxidant B215, 0.6 parts by weight

[0045] Ultraviolet absorber: UV-196, 0.8 parts by weight

[0046] The preparation method of above-mentioned polyurethane flame retardant film comprises the following steps:

[0047] 1) Preparation of flame retardant crosslinking agent:

[0048] Heat 35.3g of phosphate diols (hydroxyl value 440mgKOH / g) in the reactor to 100°C, remove water under reduced pressure for 2 hours, then feed nitrogen into the reactor, and cool down to 50°C under normal pressure, Add 64.7g of dicyclohexylmethane diisocyanate, control the prepolymerization temperature to 90°C, and react for 2.5 hours to prepare a polyurethane prepolymer with an -NCO content of 10% by weight, that is, a fla...

Embodiment 2

[0054] A kind of polyurethane flame retardant film, comprises the raw material of following weight part:

[0055] Aliphatic TPU particles: 84 parts by weight, hardness 85Shore A

[0056] Flame retardant crosslinking agent: 15 parts by weight

[0057] Antioxidant: composite antioxidant B225, 0.5 parts by weight

[0058] Ultraviolet absorber: UV-1164, 0.5 parts by weight

[0059] The preparation method of above-mentioned polyurethane flame retardant film comprises the following steps:

[0060] 1) Preparation of flame retardant crosslinking agent:

[0061] Heat 35.3g of phosphate diols (hydroxyl value 480mgKOH / g) in the reactor to 110°C, remove water under reduced pressure for 2 hours, then feed nitrogen into the reactor, and cool down to 55°C under normal pressure, Add 75g of dicyclohexylmethane diisocyanate, control the prepolymerization temperature to 80°C, and react for 2.5 hours to prepare a polyurethane prepolymer with an -NCO content of 16% by weight, that is, a flame ...

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Abstract

The invention provides a polyurethane flame-retardant film, a preparation method and an application thereof. The polyurethane flame retardant film comprises the following raw materials in parts by weight: aliphatic TPU particles, 83-98 parts by weight; 1-16 parts of flame-retardant crosslinking agent; 1-4.5 parts of auxiliary agent. The polyurethane flame-retardant film of the present invention has a tensile strength of 20-45Mpa, a tear strength of 75-85N / mm, a hardness of 80-95shore A, and a flame-retardant grade of UL94 VTM-0, which can overcome the existing invisible car cover The film is flammable or has general technical defects in flame retardant performance, and it has excellent mechanical properties while ensuring the flame retardant effect.

Description

technical field [0001] The invention belongs to the field of invisible car coating films, and in particular relates to a polyurethane flame-retardant film used for invisible car coating films and a preparation method thereof. Background technique [0002] During the actual use of the car, sand, dust, acid rain, pollutants, etc. in the environment will cause damage to the car paint, such as impact and corrosion, which will lead to damage, cracking and dissolution of the car paint. The traditional protective measures are waxing and polishing on the surface of the car paint. This method requires the car to go to the maintenance agency for maintenance on a regular basis, which not only brings trouble to the car owner, but also increases the financial burden of the car owner. Therefore, in order to reduce the number of times the car goes to the maintenance agency for maintenance, most car owners will extend the use of invisible car film after purchasing a new car. [0003] At pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08L75/08C08J5/18C08J3/24C08G18/75C08G18/50B60J11/04
CPCC08J5/18C08J3/246C08G18/758C08G18/509B60J11/04C08J2375/04C08J2475/08
Inventor 王晨怡姜媛庄田雨陈建君王亦可王亦加庄润禾
Owner 北京浦江兄弟科技有限公司
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