Preparing method and application of amination graphene oxide modified solvent-free-type polyurethane resin

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

Active Publication Date: 2019-09-06
HEFEI ANLI POLYURETHANE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since polyurethane is a high molecular polymer composed of alternating sequences of soft and hard segments, its

Method used

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  • Preparing method and application of amination graphene oxide modified solvent-free-type polyurethane resin

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[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...

Example Embodiment

[0056] Example 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) int...

Example Embodiment

[0067] Example 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 s...

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Abstract

The invention discloses a preparing method and application of amination graphene oxide modified solvent-free-type polyurethane resin. The method comprises the steps of 1, adopting diamine for modifying graphene oxide to obtain amination graphene oxide with amido groups and hydroxyl groups; 2, carrying out a reaction between diisocyanate and dihydric alcohol to prepare a polyurethane prepolymer with the mass fraction of isocyanate being 3-8%; 3, dispersing the amination graphene oxide in the diamine to cure the polyurethane prepolymer to obtain the modified solvent-free-type polyurethane resin.The prepared amination graphene oxide modified solvent-free-type polyurethane resin can be applied to automotive trim leather, and has high peeling strength and good heat conduction, electric conduction and static electricity resistance.

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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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 李晓飞王海峰孔为青范仁祥姚克俭
Owner HEFEI ANLI POLYURETHANE NEW MATERIAL
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