A kind of preparation method and application of aminated graphene oxide modified solvent-free polyurethane resin

A polyurethane resin, amination technology, used in textiles and papermaking, etc., can solve the problems of application limitation and insufficient thermal conductivity, and achieve the effects of long pot life, high production efficiency and low energy consumption

Active Publication Date: 2021-02-09
HEFEI ANLI POLYURETHANE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since polyurethane is a high molecular polymer composed of alternating sequences of soft and hard segments, its application is limited due to its insufficient performance in electrical conductivity and thermal conductivity.

Method used

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  • A kind of preparation method and application of aminated graphene oxide modified solvent-free polyurethane resin

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preparation example Construction

[0035] A preparation method for aminated graphene oxide modified solvent-free polyurethane resin, comprising the following steps:

[0036] (1), preparation of aminated graphene oxide:

[0037] Take 1-5 parts by weight of graphene oxide, 800-1000 parts by weight of N,N-dimethylformyl, and 1-8 parts by weight of 3,5-diethyl-2, 4-toluenediamine, after mixing the three, carry out stirring reaction for a period of time to obtain aminated graphene oxide;

[0038] (2), utilize the aminated graphene oxide that step (1) obtains to prepare curing agent:

[0039] Disperse the aminated graphene oxide prepared in step (1) in the diamine, and then stir evenly to obtain the curing agent, wherein the weight parts of the aminated graphene oxide and the diamine are as follows:

[0040] 2-5 parts of aminated graphene oxide,

[0041] 10-20 parts of diamine;

[0042] (3), prepare polyurethane prepolymer:

[0043] Take 20-30 parts by weight of diisocyanate, 0.05-0.5 parts by weight of antioxid...

Embodiment 1

[0057] A preparation method for aminated graphene oxide modified solvent-free polyurethane resin, comprising the following steps:

[0058] (1), preparation of aminated graphene oxide:

[0059] Take 1g of graphene oxide and 800g of N,N-dimethylformyl, first mix and ultrasonicate for 1.6h, then add 1g of 3,5-diethyl- 2,4-toluenediamine, the three were mixed and stirred at 22°C for 23 hours to obtain the reactant. The reactant was washed 5 times, and then vacuum-dried at 33°C for 70 hours to obtain aminated graphene oxide ;

[0060] (2), utilize the aminated graphene oxide that step (1) obtains to prepare curing agent:

[0061] Take step (1) to prepare 2g of aminated graphene oxide and 10g of 2,4-diamino-3,5-dimethylthiochlorobenzene and mix and stir evenly at room temperature.

[0062] (3), prepare polyurethane prepolymer:

[0063] Add 20g of 4,4'-diphenylmethane diisocyanate, 0.05g of antioxidant 1010, and 85g of polytetrahydrofuran diol (PTMG-2000) into a three-necked flas...

Embodiment 2

[0068] A preparation method for aminated graphene oxide modified solvent-free polyurethane resin, comprising the following steps:

[0069] (1), preparation of aminated graphene oxide:

[0070] Take 2 g of graphene oxide and 900 g of N,N-dimethylformyl, first mix and ultrasonicate for 2 hours, then add 4 g of 3,5-diethyl-2 , 4-toluenediamine, mixing the three, stirring and reacting at 25°C for 24 hours to obtain a reactant, washing the reactant 7 times, and then vacuum-drying at 35°C for 73h to obtain aminated graphene oxide;

[0071] (2), utilize the aminated graphene oxide that step (1) obtains to prepare curing agent:

[0072] Take step (1) to prepare 4g of aminated graphene oxide and 15g of 3,5-dimethylthiotoluenediamine and mix and stir evenly at room temperature.

[0073] (3), prepare polyurethane prepolymer:

[0074] Add 25g of isophorone diisocyanate, 0.2g of antioxidant 245 and 80g of polycarbonate diol (PCDL-1000) into a three-necked flask in sequence, raise the te...

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Abstract

The invention discloses a preparation method and application of an aminated graphene oxide modified solvent-free polyurethane resin. The method includes the steps of: (1) modifying graphene oxide with a diamine to obtain an amine group with an amine group and a hydroxyl group (2) Prepare a polyurethane prepolymer with a mass fraction of isocyanate of 3-8% by reacting diisocyanate with diol; (3) Utilize aminated graphene oxide dispersed in diamine to cure polyurethane The prepolymer yields a modified solvent-free polyurethane resin. The aminated graphene oxide modified solvent-free polyurethane resin prepared by the invention can be applied to automotive interior leather, and has high peel strength and good thermal conductivity, electrical conductivity and antistatic performance.

Description

technical field [0001] The invention relates to the field of preparation methods of polyurethane synthetic leather, in particular to a preparation method and application of aminated graphene oxide modified solvent-free polyurethane resin. Background technique [0002] Graphene is based on sp 2 A single-layer two-dimensional honeycomb crystal structure formed by close packing of hybrid forms. Its performance is superior. After research, it is found that the tensile strength can reach 125GPa, the theoretical thermal conductivity can reach 5000W / (m K), and the theoretical electron migration rate is 200000cm 2 / Vs, the calculated value of the specific surface area is 2630m 2 / g, with excellent mechanical, thermal, electrical, flame retardant and other properties. Adding a small amount can obviously change the properties of the material, so it has become a research hotspot in many fields. [0003] Polyurethane is a block copolymer with both plasticity and elasticity. The mole...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/44C08G18/42C08G18/10C08G18/32D06N3/00D06N3/14
CPCC08G18/10C08G18/4277C08G18/44C08G18/4854D06N3/0097D06N3/14D06N2209/041D06N2209/046D06N2209/062D06N2211/28C08G18/324C08G18/3876
Inventor 姚克俭李晓飞王海峰孔为青
Owner HEFEI ANLI POLYURETHANE NEW MATERIAL
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