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Aminouracil maleamic acid as well as preparation method thereof and polyvinyl chloride heat stabilizer

A technology of aminouracil and maleamic acid, which is applied in organic chemistry and other fields, and can solve the problems of poor PVC compatibility, easy frosting and precipitation, etc.

Inactive Publication Date: 2018-07-27
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the above invention, the aminouracil compounds used belong to small molecular compounds, and in the application process, there are problems of poor compatibility with PVC and easy blooming and precipitation

Method used

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  • Aminouracil maleamic acid as well as preparation method thereof and polyvinyl chloride heat stabilizer
  • Aminouracil maleamic acid as well as preparation method thereof and polyvinyl chloride heat stabilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Preparation of aminouracil maleamic acid

[0032] After pouring maleic anhydride (MAH) into the flask, heat and stir and blow nitrogen, then add aminouracil compounds, raise the temperature to 70°C, and react for 8 hours to obtain the product.

[0033] Wherein, the reaction ratio of maleic anhydride and semi-uracil compounds is 1:1; semi-uracil compounds are selected as 1,3-dialkyl-6-amino-uracil.

[0034] 2. Preparation of polyvinyl chloride (PVC) material

[0035] Formula: 100 parts of PVC, 3 parts of aminouracil maleamic acid, 2 parts of calcium stearate, 1 part of zinc stearate, 1 part of stearic acid, 4 parts of calcium carbonate, 4 parts of dioctyl phthalate (DOP), parts are parts by weight.

[0036] Weigh the raw materials according to the formula, and mix them evenly with a stirrer to obtain PVC material 1. Then, detect the performance of PVC material 1 with reference to national standard GB / T2917.1-2002. Among them, the Congo red experiment commonly used...

Embodiment 2

[0038] 1. Preparation of aminouracil maleamic acid

[0039] After pouring maleic anhydride (MAH) into the flask, heat and stir and blow nitrogen, then add aminouracil compounds, raise the temperature to 90°C, and react for 5 hours to obtain the product.

[0040] Wherein, the reaction ratio of maleic anhydride and aminouracil compounds is 1:1.2.

[0041] 2. Preparation of polyvinyl chloride (PVC) material

[0042] Formula: 100 parts of PVC, 2 parts of aminouracil maleamic acid, 2 parts of calcium stearate, 1 part of zinc stearate, 1 part of stearic acid, 4 parts of calcium carbonate, 4 parts of dioctyl phthalate (DOP), parts are parts by weight.

[0043] Weigh the raw materials according to the formula, and mix them evenly with a stirrer to obtain PVC material 2. Then, check the performance of PVC material 2 with reference to national standard GB / T2917.1-2002. Among them, the Congo red experiment commonly used in the PVC product industry is used to characterize the static t...

Embodiment 3

[0045] 1. Preparation of tin aminouracil maleamate

[0046] After pouring maleic anhydride (MAH) into the flask, heat and stir and blow nitrogen, then add aminouracil compounds, raise the temperature to 120°C, and react for 2 hours to obtain the product.

[0047] Wherein, the reaction ratio of maleic anhydride and semi-uracil compound is 1:1.5.

[0048] 2. Preparation of polyvinyl chloride (PVC) material

[0049]Formula: 100 parts of PVC, 3 parts of aminouracil maleamic acid, 2 parts of calcium acetylacetonate, 1 part of zinc acetylacetonate, 1 part of stearic acid, 4 parts of calcium carbonate, 4 parts of dioctyl phthalate (DOP ), the parts are parts by weight.

[0050] Weigh the raw materials according to the formula, and mix them evenly with a stirrer to obtain PVC material 3. Then, check the performance of PVC material 3 with reference to national standard GB / T2917.1-2002. Among them, the Congo red experiment commonly used in the PVC product industry is used to charact...

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Abstract

The invention belongs to the field of fine chemistry, and particularly relates to aminouracil maleamic acid as well as a preparation method thereof and polyvinyl chloride heat stabilizer. The invention provides aminouracil maleamic acid, and a structure of the aminouracil maleamic acid is as shown by the general formula (I), wherein R1 and R2 are respectively and independently selected from hydrogen, alkyl or substituent alkyl. The aminouracil maleamic acid of the invention can inhibit the further degradation and coloring of polyvinyl chloride and is bonded onto a PVC molecular chain by virtueof a chemical bond, and the stability of the aminouracil maleamic acid in a product is improved, so that the uracil is unlikely to precipitate, the polyvinyl chloride heat stabilizer is a multifunctional heat stabilizer integrating a primary stabilizing effect and a long-term stabilizing effect and can be used for solving the problems that the existing heat stabilizer is poor in compatibility with the PVC and easy to precipitate in a spraying manner. (the formula (1) is shown in the description).

Description

technical field [0001] The invention belongs to the field of fine chemicals, and in particular relates to aminouracil maleamic acid, a preparation method thereof, and a polyvinyl chloride heat stabilizer. Background technique [0002] As the second largest general-purpose plastic in the world, polyvinyl chloride (PVC) has the characteristics of corrosion resistance, flame retardancy, and good insulation performance. It is widely used in industrial construction, medical care, daily necessities, and agriculture. However, since PVC is generally the product of free radical polymerization, there are certain 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, and are easily degraded under processing conditions. The release of HCl gas makes the color of the final product poor, while the mechanical properties decrease, reducing the use value. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D239/545C08L27/06C08K5/3462C08K5/098C08K5/09C08K5/12C08K5/00C08K3/26C08K13/02
CPCC07D239/545C08K3/26C08K5/0091C08K5/09C08K5/098C08K5/12C08K5/3462C08K13/02C08K2003/265C08K2201/014C08L2201/08C08L27/06
Inventor 廖正福曹慧娟陈庆华王新波林泽鹏
Owner GUANGDONG UNIV OF TECH
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