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Uracil maleamic polyol ester and preparation method and application thereof

A technology of maleamic acid and polyol ester, applied in organic chemistry and other directions, can solve the problems of insufficient thermal stability and durability, and achieve the effects of inhibiting degradation and coloring, simple preparation method and improving precipitation resistance.

Inactive Publication Date: 2018-12-18
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of the existing aminouracil stabilizers with insufficient thermal stability and durability, and provide a kind of uracil maleamic acid polyol ester, uracil maleamic acid polyol Ester combines multiple thermal stability functions such as aminouracil, polyol (ester), maleic anhydride, etc., and has both initial and long-term thermal stability performance, high thermal stability and non-toxic environmental protection

Method used

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  • Uracil maleamic polyol ester and preparation method and application thereof
  • Uracil maleamic polyol ester and preparation method and application thereof
  • Uracil maleamic polyol ester and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of 1,3-dimethyl-6 aminouracil pentaerythritol maleamic acid ester, its preparation method is as follows:

[0036] S1. Take 24.5g (0.25mol) of maleic anhydride and pour it into a 500ml three-neck round bottom flask, stir and heat up to 60°C, and pass nitrogen gas. After it melts, add 38.8g (0.25mol) of 1,3-dimethyl -6-aminouracil, the intermediate 1,3-dimethyl-6-aminouracil maleamic acid

[0037] ,

[0038] Wherein the amidation reaction temperature is 70°C, the reaction time is 4h, and the molar ratio of maleic anhydride to 1,3-dimethyl-6-aminouracil is 1:1;

[0039]S2. Add 20.5g (0.15mol) of pentaerythritol and 38g (0.15mol) of 1,3-dimethyl-6-aminouracil maleamic acid into a 250ml three-necked round-bottomed flask, and add 0.8g (2.2% of polyol) ) Titanium sulfate, the titanium sulfate has been roasted at 500°C for 3 hours, heated to reflux to separate water, and the product obtained from the esterification reaction under sufficient stirring is 1,3-dimethyl-6...

Embodiment 2

[0043] A kind of preparation method of 1,3-dimethyl-6 aminouracil maleamic acid polyol ester, comprises the steps:

[0044] S1. Take 24.5g (0.25mol) of maleic anhydride and pour it into a 500ml three-neck round bottom flask, stir and heat up to 60°C, and blow nitrogen gas. After it melts, add 58.2g (0.38mol) of 1,3-dimethyl -6 aminouracil, the intermediate 1,3-dimethyl-6 aminouracil maleamic acid,

[0045] Wherein the amidation reaction temperature is 90°C, the reaction time is 3h, and the molar ratio of maleic anhydride to 1,3-dimethyl-6-aminouracil is 1:1.5;

[0046] S2. Add 15.66g (0.115mol) of pentaerythritol and 38g (0.15mol) of 1,3-dimethyl-6-aminouracil maleamic acid into a 250ml three-necked round-bottomed flask, and add 0.6g (0.0025mol) of titanium sulfate , the titanium sulfate has been roasted at 500°C for 3 hours, heated to reflux to separate water, and the product obtained from the esterification reaction under sufficient stirring is 1,3-dimethyl-6-aminouracil ma...

Embodiment 3

[0049] A kind of preparation method of 1,3-dimethyl-6 aminouracil maleamic acid polyol ester, comprises the steps:

[0050] S1. intermediate 1,3-dimethyl-6 aminouracil maleamic acid is obtained according to the method of embodiment 1;

[0051] S2. Add 18.5g (0.136mol) of pentaerythritol and 38g (0.15mol) of 1,3-dimethyl-6-aminouracil maleamic acid into a 250ml three-necked round-bottomed flask, and add 0.7g (0.0030mol) of titanium sulfate , the titanium sulfate has been roasted at 500°C for 3 hours, heated to reflux to separate water, and the product obtained from the esterification reaction is 1,3-dimethyl-6-aminouracil maleamic acid pentaerythritol ester under full stirring.

[0052] Wherein, the esterification reaction temperature is 170° C., the reaction time is 4 hours, and the molar ratio of 1,3-dimethyl-6-aminouracil maleamic acid to pentaerythritol is 1:1.1.

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Abstract

The invention discloses uracil maleamic polyol ester and a preparation method and application thereof. The chemical formula of uracil maleamic polyol ester is as shown in the specification, wherein R1is H or CnH2n+1, R2 is H or CnH2n+1, R3 is CnH2n+1-x(OH)X, n=1-10, and X is greater than or equal to 3. The uracil maleamic polyol ester can effectively inhibit degradation and coloration of PVC, improve thermal stability of PVC, and enhance precipitation resistance of aminouracil. The plasticized peak torque reaches 18-26 Nm, equilibrium torque is 15.0-16.8 Nm, and equilibrium time is 28-35min.Meanwhile, the uracil maleamic polyol ester has good synergistic effect with a Ca-Zn heat stabilizer when being used as a PVC heat stabilizer. Thus, heat stability and precipitation resistance of PVCare further improved, and the heat stable temperature can reach 190-195 DEG C.

Description

technical field [0001] The invention relates to the technical field of fine chemicals, and more specifically, to a polyol uracil maleamic acid ester and a preparation method and application thereof. Background technique [0002] Polyvinyl chloride (PVC) has the characteristics of corrosion resistance, flame retardant, and good insulation performance. It is widely used in the fields of profiles, pipes, sheets, and decorative films. It is one of the five general-purpose resins. However, PVC products obtained by free radical polymerization There are inevitably unstable defect structures in the molecular chain, such as allyl chloride, tertiary chlorine, etc., which cause the decomposition temperature of PVC to be lower than the processing temperature during processing, and it is easy to degrade and remove HCl under the action of processing shear force Gas, so that the color of the final product is not good, while the mechanical properties decrease, reducing the use value. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D239/545C08K5/3462C08L27/06
CPCC07D239/545C08K5/3462C08L2201/08C08L27/06
Inventor 廖正福陈庆华陈征叶炜华王新波
Owner GUANGDONG UNIV OF TECH
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