Diethylene glycol copolymerized halogen-free flame-retardant unsaturated polyester resin and preparation method thereof

A polyester resin, unsaturated technology, applied in the field of diethylene glycol copolymerization of halogen-free flame retardant unsaturated polyester resin and its preparation, can solve the problem of inability to be linked with flame retardant, achieve excellent flame retardant effect, bending Strength and tensile strength increase, cost reduction effect

Active Publication Date: 2016-03-23
南京新化原容和新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the basic properties and uses of diethylene glycol, it cannot be associated with flame retardancy. It has never been reported in the prior art, and no one has studied the use of diethylene glycol as a comonomer to obtain a new type of flame-retardant, high-strength unsaturated Polyester resin material, the invention creatively discovers the new use of diethylene glycol, that is, on the basis of not affecting the current existing unsaturated polyester polymerization process, with the assistance of a small amount of added flame retardant, only by adding diethylene glycol Alcohol comonomers can be used to obtain new flame-retardant, high-strength unsaturated polyester resin materials, thereby solving the problems and deficiencies in the prior art

Method used

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  • Diethylene glycol copolymerized halogen-free flame-retardant unsaturated polyester resin and preparation method thereof
  • Diethylene glycol copolymerized halogen-free flame-retardant unsaturated polyester resin and preparation method thereof
  • Diethylene glycol copolymerized halogen-free flame-retardant unsaturated polyester resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 29.62g of phthalic anhydride, 19.62g of maleic anhydride, 16.73g of 1,2-propanediol, 23.35g of diethylene glycol, 0.87 g dibutyltin oxide. Heat up to 140°C and start mechanical stirring. After the monomers are all dissolved, raise the temperature to 160°C, and control the temperature for one hour, then continue to raise the temperature to 170°C, 180°C, and 190°C respectively, and control the temperature for one hour. Raise the temperature to 190-200°C, continue the reaction for 5 hours, and then measure the acid value every half hour. When the acid value of the system reaches 36mgKOH / g, stop the reaction, cool down to 160°C, depressurize and vacuumize during the cooling process, add 0.0087g polymerization inhibitor, stirred for 10min. Continue to lower the temperature to 90°C, add 30.42g of styrene weighed in advance to dilute, control the temperature and stir for 30 minutes to stabilize the system, and finally discharge to obtain an unsaturated polyester resin pr...

Embodiment 2

[0025] Add 29.62g of phthalic anhydride, 19.62g of maleic anhydride, 10.04g of 1,2-propanediol, 32.68g of diethylene glycol, 0.87 g dibutyltin oxide. The polycondensation program temperature control and diluent addition method and the structural formula of the unsaturated polyester resin prepolymer are the same as in Example 1. The number average molecular weight Mn of the prepolymer is 2600g / mol, and the weight average molecular weight is 3900g / mol. 100 parts of the unsaturated polyester resin prepolymer, 1.5 parts of methyl ethyl ketone peroxide, 0.2 parts of cobalt composite accelerator, stirred evenly, removed air bubbles, and demolded after curing at room temperature for 2 hours. After testing, its oxygen index is 26%, the tensile strength is 55.1MPa, the bending strength is 82.8MPa, and the impact strength is 11.5KJ / m 2 .

Embodiment 3

[0027] Add 29.62g of phthalic anhydride, 19.62g of maleic anhydride, 23.41g of 1,2-propanediol, 14.01g of diethylene glycol, 0.87 g dibutyltin oxide. The polycondensation program temperature control and diluent addition method and the structural formula of the unsaturated polyester resin prepolymer are the same as in Example 1. The number average molecular weight Mn of the prepolymer is 2400g / mol, and the weight average molecular weight is 3500g / mol. 100 parts of the unsaturated polyester resin prepolymer, 1.5 parts of methyl ethyl ketone peroxide, 0.2 parts of cobalt composite accelerator, stirred evenly, removed air bubbles, and demolded after curing at room temperature for 2 hours. After testing, its oxygen index is 25%, the tensile strength is 39.1MPa, the bending strength is 82.8MPa, and the impact strength is 11.5KJ / m 2 .

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Abstract

The invention discloses diethylene glycol copolymerized halogen-free flame-retardant unsaturated polyester resin and a preparation method thereof. The oxygen index measured value LOI of the diethylene glycol copolymerized halogen-free flame-retardant unsaturated polyester resin is increased to 26% from 20% compared with that of unsaturated polyester resin without a diethylene glycol component. The impact strength, bending strength and bending strength are all improved by 50% or above, wherein the impact strength can be improved by ten times. Diethylene glycol is used as a comonomer and well applied for improving the flame-retardant performance of the diethylene glycol copolymerized halogen-free flame-retardant unsaturated polyester resin. The structural general formula of a prepolymer of the diethylene glycol copolymerized halogen-free flame-retardant unsaturated polyester resin is shown as below (please see the specifications), wherein x is between 6 and 12, R1 is phenyl, R2 is alkyl and R3 is unsaturated alkyl.

Description

technical field [0001] The invention relates to an unsaturated polyester resin and a preparation method thereof, in particular to a diethylene glycol copolymerized halogen-free flame-retardant unsaturated polyester resin and a preparation method thereof. Background technique [0002] Unsaturated polyester resin (UPR) is widely used in construction, interior decoration and other fields, but it is sensitive to heat like many high polymers after curing. When the general-purpose unsaturated polyester resin matrix encounters an external fire source, it will inevitably cause combustion. The occurrence of the phenomenon will bring great security risks. Halogen-free flame retardant system is a new type of flame retardant system, the amount of smoke is small when burning, and no toxic or corrosive gas is produced. At present, there are usually two basic methods for the halogen-free flame retardant of UPR. One is the most widely used additive flame retardant, with melamine, red phos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/676C08G63/78C08K3/32
CPCC08G63/676C08G63/78C08K3/32C08K2003/323
Inventor 陈双俊郭清明王丽敏
Owner 南京新化原容和新材料有限公司
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