A kind of polyurethane prepolymer and preparation method thereof

A polyurethane prepolymer and polyester polyol technology, applied in the field of polyurethane prepolymer and its preparation, can solve the problems of short storage period and poor stability, and achieve the effect of long storage period, high stability and high NCO content

Active Publication Date: 2018-08-28
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] According to one aspect of the present application, a polyurethane prepolymer is provided to overcome the disadvantages of poor stability and short storage period of NCO prepolymers with low viscosity and high NCO content, which are not conducive to the synthesis of solvent-free polyurethane materials

Method used

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  • A kind of polyurethane prepolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The weight ratio of each component in the raw material is as follows:

[0053] Polyethylene glycol (polyether polyol): 18.5 parts by weight, number average molecular weight Mn=1500;

[0054] Polyethylene adipate (polyester polyol): 40 parts by weight, number average molecular weight Mn=2500;

[0055] Isophorone diisocyanate IPDI (isocyanate): 48 parts by weight;

[0056] Di-n-butyltin dilaurate (catalyst): 0.01 parts by weight

[0057] Diethanolamine (chain extender): 0.82 parts by weight;

[0058] Anti-yellowing agent 8168 and modified silicone oil (auxiliary: anti-yellowing agent and defoamer at a weight ratio of 1:1): 0.01 parts by weight.

[0059] Concrete preparation steps are as follows:

[0060] Add 3.7g of polyethylene glycol (PEG-1500) and 8g of adipate (Mn=2500) into a dry three-necked flask, install a vacuum distillation device, raise the temperature to 85°C, and distill under reduced pressure to remove water for 2 hours, try to remove trace water in...

Embodiment 2

[0065] The weight ratio of each component in the raw material is as follows:

[0066] Polypropylene glycol (polyether polyol): 16 parts by weight, number average molecular weight Mn=3000;

[0067] Polypropylene adipate (polyester polyol): 45 parts by weight, number average molecular weight Mn=3000;

[0068] Hexamethylene diisocyanate HDI (isocyanate): 38 parts by weight;

[0069] Two (2-dimethylaminoethyl) ether (catalyst): 0.05 parts by weight;

[0070] N-methyldiethanolamine (chain extender): 0.94 parts by weight;

[0071] Anti-yellowing agent 8168 and modified silicone oil (auxiliary: anti-yellowing agent and defoamer at a weight ratio of 1:1): 0.01 parts by weight.

[0072] Concrete preparation steps are as follows:

[0073] Add 3.2g of polypropylene glycol (PPG-3000) and 9g of adipate (Mn=3000) into a dry three-necked flask, install a vacuum distillation device, raise the temperature to 95°C, and distill and remove water under reduced pressure under mechanical sti...

Embodiment 3

[0078] The weight ratio of each component in the raw material is as follows:

[0079] Polyethylene glycol (polyether polyol): 10 parts by weight, number average molecular weight Mn=600;

[0080] Polyethylene adipate (polyester polyol): 44 parts by weight, number average molecular weight Mn=2000;

[0081] Isophorone diisocyanate IPDI (fatty isocyanate): 35 parts by weight;

[0082] Toluene diisocyanate TDI (aromatic isocyanate): 10.4 parts by weight;

[0083] Di-n-butyltin dilaurate (catalyst): 0.09 parts by weight;

[0084] Diethanolamine (chain extender): 0.5 parts by weight;

[0085] Anti-yellowing agent 8168 and modified silicone oil (auxiliary: anti-yellowing agent and defoamer at a weight ratio of 1:1): 0.01 parts by weight.

[0086] Concrete preparation steps are as follows:

[0087] Add 2g of polyethylene glycol (PEG-3000) and 8.8g of polycarbonate (Mn=2000) into a dry three-necked flask, install a vacuum distillation device, raise the temperature to 80°C to 12...

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Abstract

The invention discloses a polyurethane prepolymer and a preparation method thereof. The isocyanate group content MNCO in the polyurethane prepolymer is 4-10%, and the viscosity at 25 DEG C is 1,000-4,000mPa.s. The storage duration of the polyurethane prepolymer at room temperature is not shorter than 3 days; and the polyurethane prepolymer has the advantages of low viscosity, high NCO content, high stability and long storage duration, is used for preparing non-solvent polyurethane and can improve the performance of the non-solvent polyurethane material.

Description

technical field [0001] The application relates to a polyurethane prepolymer and a preparation method thereof, belonging to the field of polyurethane material preparation. Background technique [0002] Polyurethane materials are polymerized by polyisocyanate and polyhydroxy or amino-containing compounds, catalysts, color modifiers and other additives under certain reaction conditions. Different distribution ratios of soft segments and rigid segments in the polyurethane molecular chain can lead to products with different physical properties from soft to hard, so they are widely used in various industries. At present, the synthesis of polyurethane materials still adopts the traditional solvent method. The traditional production method has low efficiency, low utilization rate of raw materials, high environmental pollution, high energy consumption, and relatively simple production technology, resulting in a lack of competitiveness in products and fierce price competition among th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/40C08G18/32C08G18/12
CPCC08G18/12C08G18/3206C08G18/4018C08G18/3275C08G18/6607
Inventor 李文木苏玉苗
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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