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Method for synthesizing polyurethane/polyacrylate ionomer emuldion

A technology of polyacrylate and synthesis method, applied in the field of synthesis of ionomer emulsion, can solve the problems such as failure to obtain stable emulsion, and achieve the effect of good compatibility

Inactive Publication Date: 2008-08-13
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, generally ionomers are gels with a three-dimensional network structure, and a stable emulsion cannot be obtained.

Method used

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  • Method for synthesizing polyurethane/polyacrylate ionomer emuldion
  • Method for synthesizing polyurethane/polyacrylate ionomer emuldion

Examples

Experimental program
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Embodiment 1

[0015] Embodiment one: the following is the example of polyurethane / polyacrylate ionomer emulsion prepared by the present invention, which has the following process and steps:

[0016] (1) Synthesis of cationic polyurethane PU

[0017] Quantitative polyisopropylene glycol (PPG) and toluene diisocyanate (TDI) were stirred at 60° C. for 3 hours (adding catalyst dibutyltin dilaurate and solvent acetone) to form a prepolymer. A measured amount of N-methyldiethanolamine (MDEA) was added, the temperature was still at 60° C., and the reaction was continued for 3 hours. The molar ratio of each reactant in the reaction is: polyisopropylene glycol (PPG): toluene diisocyanate (TDI): N-methyldiethanolamine (MDEA)=1:2:1. Specific dosage: Polyisopropylene glycol (PPG) 0.1mol, toluene diisocyanate (TDI) 0.2mol, N-methyldiethanolamine (MDEA) 0.1mol

[0018] (2) Synthesis of polyurethane / polyacrylate PUA

[0019] Adjust the pH value of polyurethane PU to 6 with acid, then pour it into water...

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Abstract

The invention relates to a synthesis method of ionomer emulsion of polyurethane / polyacrylate. The method includes steps of: charging poly(propylene glycol) PPG, toluene diisocyanate TDI, and N-methyl diethanolamine MDEA into acetone, using dibutyltin dilaurate as catalyst, obtaining polyurethane PU; regulating pH value of polyurethane to 6, adding the polyurethane PU into water for emulsification under stirring, and obtaining emulsion; mixing the emulsion with mixed monomer to react at the temperature of 60-70 DEG C. for 3-4 hours, with azodiisobutyronitrile as catalyst, obtaining polyurethane / polyacrylate. Polyurethane (PU) and polyacrylate (PA) in synthesized PUA has great compatibility, and it is proven that there is ionic bond effect in the system by infrared spectrum (FTIR), thermo analysis (DSC) and viscosity, which enhances compatibility between PU and PA, therefore ionomer PUA is synthesized.

Description

technical field [0001] The invention relates to a method for synthesizing an ionomer emulsion, in particular to a method for synthesizing a polyurethane / polyacrylate ionomer emulsion. Background technique [0002] Both polyurethane (PU) and polyacrylate (PA) are important polymer products used in large quantities. Polyacrylate (PA) has the advantages of high mechanical strength, aging resistance, light resistance without yellowing, and good water resistance, but has disadvantages such as toughness, wear resistance, poor chemical resistance, stickiness at high temperature, and brittleness at low temperature. The use of polyurethane (PU) to modify polyacrylate (PA) can take advantage of the excellent cold resistance, elasticity, and good temperature adaptability of polyurethane (PU), and polyacrylate (PA) has certain properties. complementarity. Polyurethane-acrylate (PUA) composite emulsion can be prepared by compounding the two, which can learn from each other and give ful...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02
Inventor 张剑秋王捷许燕侠丁宏博庄菁
Owner SHANGHAI UNIV
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