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Aryl polyester polyurethane resin

A technology of polyurethane resin and polyester polyurethane, which is applied in the field of aryl polyester polyurethane resin, can solve the problems of migration of small molecule additives and affect the use, etc., and achieve the effect of determining the target molecular structure, simple preparation process, and improved flame retardancy

Active Publication Date: 2012-09-19
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In WO 2006121549 A1, after adding phosphorus-containing additives, although the flame retardant effect is greatly improved, it also faces the problem that the small molecule additives will migrate to the surface of the product during long-term use, thereby affecting its use.

Method used

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  • Aryl polyester polyurethane resin
  • Aryl polyester polyurethane resin
  • Aryl polyester polyurethane resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Obtain a kind of aryl polyester polyurethane product APU-1 step by step:

[0035] First, take 4-acetoxybenzoic acid, terephthalic acid and p-diacetoxybenzene, mix them according to the molar ratio of 6:4:3, and synthesize the carboxyl-terminated oligomer C1 according to the method provided in Document 1. The functional group is 2 and the molecular weight is 1942. Secondly, take the oligomer C1 with a molar ratio of 1:2 and diethylene glycol for polycondensation reaction to obtain an aryl polyester polyol with 2 functional groups. Again, polycondensation of aryl polyester polyol and toluene diisocyanate to obtain polyurethane prepolymer. Finally, the polyurethane prepolymer was chain-extended with 1,4-butanediol (the molar ratio of NCO to hydroxyl was 1:1) to obtain polyurethane APU-1.

[0036] The thermogravimetric analysis results of polyurethane resin APU-1 are shown in Table 1. The data show that the prepared aryl polyester polyurethane resin has good high temperat...

Embodiment 2

[0038] Polyurethane APU-2 was prepared by reacting the polyurethane prepolymer prepared in Example 1 with the crosslinking agent trimethylolpropane (TMP) (the molar ratio of NCO to hydroxyl was 1:1). The thermogravimetric analysis results of polyurethane resin APU-2 are shown in Table 1. The data show that the prepared aryl polyester polyurethane resin has good high temperature resistance, and this resin can be used as a matrix for high temperature solid powder coatings.

Embodiment 3

[0040] Obtain a kind of aryl polyester polyurethane product APU-3 step by step:

[0041] First, take 1,3,5-benzenetricarboxylic acid, 4-acetoxybenzoic acid, isophthalic acid and p-diacetoxybenzene and mix them in a molar ratio of 2:5:1:2. Methods, synthesis of carboxyl-terminated oligomer C2, its functional group is 4, molecular weight is 1334. In addition, 4-acetoxybenzoic acid, isophthalic acid and p-diacetoxybenzene were mixed according to the molar ratio of 6:3:4, and the acyl-terminated oligomer A1 was synthesized according to the method provided in Document 1. Its functional group is 2 and its molecular weight is 1778. Secondly, the carboxyl-terminated oligomer C2 and the acyl-terminated oligomer A1 are mixed, and the polycondensation reaction obtains a body-shaped carboxyl-terminated aryl polyester; the carboxyl-terminated aryl polyester continues to react with excess ethylene glycol to obtain Aryl polyester polyol. Finally, a thermosetting polyurethane APU-3 was obt...

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PUM

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Abstract

The invention discloses polyurethane containing an aryl polyester structure. Aryl polyester polyurethane is a product obtained by reacting aryl polyester polyalcohol with a polyisocyanate compound, wherein the aryl polyester polyalcohol serving as a reactant is obtained by performing condensation polymerization on aryl polyester of terminal carboxyl and small molecular dihydric alcohol. The aryl polyester polyurethane synthesized with a condensation polymerization method has the advantages of simple preparation process and determined target molecular structure. Meanwhile, the aryl polyester polyurethane has the characteristics of high temperature resistance, flame retardance and recyclability. A polyurethane resin can be directly processed into a material, and can be taken as a component of a composite material.

Description

technical field [0001] The invention relates to a polyurethane resin, in particular to an aryl polyester polyurethane resin. Background technique [0002] Polyurethane resin is a polymer with unique properties and multiple uses. It is formed by addition polymerization of diisocyanate and polyol as basic raw materials; it can be used to produce products such as foam plastics, elastomers, coatings and adhesives, and can also be Composite with other materials, such as fiber, glass, and film, to produce high-performance composite materials. The polyurethane main chain is composed of flexible segments (also known as soft segments) whose glass transition temperature is lower than room temperature and rigid segments (also known as hard segments) whose glass transition temperature is higher than room temperature. In polyurethane, due to the incompatibility of soft and hard segments, there is an obvious microscopic phase separation structure, in which the soft segment phase provides...

Claims

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Application Information

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IPC IPC(8): C08G18/42
Inventor 郑震张曼谷常炜
Owner SHANGHAI JIAO TONG UNIV
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