Hyperbranched polyurethane containing active amino groups and preparation method thereof

A technology of hyperbranched polyurethane and linear polyurethane, which is applied in the field of hyperbranched polyurethane and its preparation, can solve the problems of poor moisture absorption and air permeability of polyurethane film, achieve good water affinity, excellent mechanical properties, and increase the effect of quantity

Active Publication Date: 2015-06-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a kind of hyperbranched polyurethane containing amino group and preparation method thereof, overcome the defect of poor moisture absorption and air permeability of existing polyurethane film

Method used

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  • Hyperbranched polyurethane containing active amino groups and preparation method thereof
  • Hyperbranched polyurethane containing active amino groups and preparation method thereof
  • Hyperbranched polyurethane containing active amino groups and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as figure 1 with figure 2 Shown, a kind of preparation method that contains the hyperbranched polyurethane of amino group, comprises the steps:

[0031] 1) Weigh 10.00g of polytetrahydrofuran ether glycol 1000 (abbreviated as PTMG1000) and dissolve it in 15ml of dried N,N-dimethylformamide (abbreviated as DMF);

[0032] 2) Under the condition of nitrogen protection, according to the material ratio of -NCO and -OH of 2.5:1, with 0.007% dibutyltin dilaurate (abbreviated as DBTDL) as the catalyst, 5.55g of isophorone di Isocyanate (abbreviated as IPDI) was stirred and reacted with polyether polyol at 85°C for 1.5h, then 0.81g of 1,4-butanediol was added, and stirred at 85°C for 2.5h for chain extension; finally, 0.37g was added Anhydrous ethanol, stirred and reacted at 80°C for 2 hours, and partially blocked to obtain a linear polyurethane prepolymer;

[0033] 3) The molar ratio of the amino-terminated hyperbranched polymer to the linear polyurethane prepolymer is...

Embodiment 2

[0036] A kind of preparation method of the hyperbranched polyurethane containing amino group, preparation flow is referred to as figure 1 with figure 2 , including the following steps:

[0037] 1) Weigh 10.00g of polyethylene glycol 1000 (abbreviated as PEG1000) and dissolve it in 15ml of dried N,N-dimethylacetamide (abbreviated as DMAC);

[0038] 2) Under the condition of nitrogen protection, according to the molar ratio of -NCO and -OH as 2.5:1, with 0.007% dibutyltin dilaurate (abbreviated as DBTDL) as catalyst, add 4.35g of toluene diisocyanate (abbreviated as DBTDL) dropwise TDI) to react with polyether polyol at 85°C for 1.5h, then add 0.81g of 1,4-butanediol, stir at 85°C for 2.5h for chain extension; finally add 0.37g of absolute ethanol , stirred and reacted at 80°C for 2 hours, and partially blocked to obtain a linear polyurethane prepolymer;

[0039] 3) The molar ratio of the amino-terminated hyperbranched polymer to the linear polyurethane prepolymer is 1:1.15,...

Embodiment 3

[0042] A kind of preparation method of the hyperbranched polyurethane containing amino group, preparation flow is referred to as figure 1 with figure 2 , including the following steps:

[0043] 1) Weigh 10.00g of polypropylene glycol 1000 (abbreviated as PPG1000) and dissolve it in 15ml of dried N,N-dimethylformamide (abbreviated as DMF);

[0044] 2) Under the condition of nitrogen protection, according to the material ratio of -NCO and -OH is 3:1, with 0.007% dibutyltin dilaurate (abbreviated as DBTDL) as catalyst, add 6.66g of isophorone di Isocyanate (abbreviated as IPDI) was stirred and reacted with polyether polyol at 85°C for 1.5h, then 1.08g of 1,4-butanediol was added, stirred and reacted at 85°C for 2.5h for chain extension; finally, 0.46g was added Anhydrous ethanol, stirred and reacted at 80°C for 2 hours, and partially blocked to obtain a linear polyurethane prepolymer;

[0045] 3) The molar ratio of the amino-terminated hyperbranched polymer to the linear poly...

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Abstract

The invention discloses hyperbranched polyurethane containing active amino groups and a preparation method thereof. The preparation method comprises the steps that firstly, polyether polyol and diisocyanate are mixed and stirred to react; secondly, a catalyst is added, organic aprotic solvent serves as solvent, and a small-molecule chain extender is added for chain extension after the reaction is performed for a period of time; thirdly, an end-capping reagent is added for partial end capping, so that linear polyurethane pre-polymers are obtained; afterwards, amino-teminated hyperbranched polymers and the linear polyurethane pre-polymers are mixed and stirred to react, so that the hyperbranched polyurethane is obtained. Hyperbranched polyurethane resin obtained by synthesizing the hyperbranched polyurethane contains a lot of active amino groups and imino groups, so the sanitary property of a polyurethane film can be improved, and the dyeing property of the polyurethane film can also be improved.

Description

technical field [0001] The invention relates to the technical field of polyurethane material processing, in particular to a hyperbranched polyurethane containing active amino groups and a preparation method thereof. Background technique [0002] Hyperbranched polymers have attracted much attention due to their unique structures and physicochemical properties. It has been widely used in coatings, resin modification aids and processing agents, cross-linking agents, drug and gene carriers, nanotechnology, supramolecular science and other fields. [0003] Polyurethane (PU) is a macromolecular compound containing repeated urethane groups in the main chain. It has high strength, wear resistance, low temperature resistance, chemical resistance, and excellent resilience. It has been widely used in PU synthetic leather. , Leather finishing agent and textile coating. Although the solvent-based dry-process polyurethane film has excellent mechanical properties, the surface of the film...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/64C08G18/48C08G18/32
CPCC08G18/12C08G18/3206C08G18/4081C08G18/4825C08G18/4833C08G18/4854C08G18/6415C08G18/6674C08G18/64
Inventor 任龙芳陈婷王学川强涛涛
Owner SHAANXI UNIV OF SCI & TECH
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