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Melamine composite material with low free formaldehyde content, preparation method thereof and melamine tableware

A technology of low free formaldehyde and composite materials, applied to melamine composite materials with low free formaldehyde content and its preparation, and in the field of melamine tableware, can solve problems such as endangering life and safety, reduce other side effects, and reduce the risk of tumor and cancer Prevalence, superior mechanical properties

Pending Publication Date: 2021-11-05
福建威鹏实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose a melamine composite material with low free formaldehyde content and its preparation method and melamine tableware, so as to solve the problem of melamine products with high free formaldehyde content and free melamine in the existing melamine powder Problems that endanger people's lives

Method used

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  • Melamine composite material with low free formaldehyde content, preparation method thereof and melamine tableware
  • Melamine composite material with low free formaldehyde content, preparation method thereof and melamine tableware
  • Melamine composite material with low free formaldehyde content, preparation method thereof and melamine tableware

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preparation example Construction

[0057] The present invention also provides a method for preparing a melamine composite material with low free formaldehyde content, comprising the following steps:

[0058] Add 2,4,6-triaminopyrimidine powder to the formaldehyde solution for a synthesis reaction to generate melamine resin;

[0059] Process the melamine resin to obtain melamine powder;

[0060] The melamine powder is then copolymerized with the pentaerythritol to generate the melamine composite material;

[0061] The molar ratio of the 2,4,6-triaminopyrimidine to formaldehyde is 1:3-1:2, and the mass ratio of the pentaerythritol to the melamine powder is 1:0.075-1:0.05.

[0062] The chemical equation for the synthesis reaction of formaldehyde and 2,4,6-triaminopyrimidine is:

[0063]

[0064] The chemical equation for the copolymerization of melamine powder and pentaerythritol is:

[0065]

[0066] The melamine composite material with low free formaldehyde content proposed according to the present inve...

Embodiment 1

[0083] In the present invention, 2,4,6-triaminopyrimidine and formaldehyde are synthesized to generate a novel melamine resin, and the novel melamine resin is processed to obtain a novel melamine powder, and then the melamine powder undergoes a copolymerization reaction with pentaerythritol to generate melamine composite material.

[0084] The steps of melamine powder preparation are as follows:

[0085] (1) According to the 1:2 molar ratio of 2,4,6-triaminopyrimidine to formaldehyde, add 106ml of formaldehyde solution into the three-necked flask, and adjust its pH to 9 with 30% NaOH solution.

[0086] (2) Add 2,4,6-triaminopyrimidine powder into the pH-adjusted formaldehyde solution, place it in a water bath heated to 86°C in advance, and control the temperature of the water bath when the white milky liquid in the flask becomes clear and transparent After 2 hours of reaction, triethanolamine was added to terminate the reaction.

[0087] (3) Take out the product at 76°C, put...

Embodiment 2

[0092] In the present invention, 2,4,6-triaminopyrimidine and formaldehyde are synthesized to generate a novel melamine resin, and the novel melamine resin is processed to obtain a novel melamine powder, and then the melamine powder undergoes a copolymerization reaction with pentaerythritol to generate melamine composite material. The steps of melamine powder preparation are as follows:

[0093] (1) According to the molar ratio of 2,4,6-triaminopyrimidine to formaldehyde of 5:12, add 106ml of formaldehyde solution into the three-necked flask, and adjust its pH to 8.5 with 30% NaOH solution.

[0094] (2) Add 2,4,6-triaminopyrimidine powder to the pH-adjusted formaldehyde solution, place it in a water bath heated to 90°C in advance, and control the temperature of the water bath when the white milky liquid in the flask becomes clear and transparent After 2 hours of reaction at 80°C, triethanolamine was added to terminate the reaction.

[0095] (3) Take out the product at 82°C, ...

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Abstract

The invention provides a melamine composite material with low free formaldehyde content, a preparation method thereof and melamine tableware, the melamine composite material comprises melamine powder and pentaerythritol, the melamine powder comprises 2, 4, 6-triaminopyrimidine and formaldehyde, the molar ratio of 2, 4, 6-triaminopyrimidine to formaldehyde is 1: 3-1: 2, and the mass ratio of pentaerythritol to melamine powder is 1: 0.075-1: 0.05. The preparation method comprises the following steps: firstly, carrying out condensation polymerization on the 2, 4, 6-triaminopyrimidine and formaldehyde to obtain novel melamine resin, adding an additive for processing to obtain novel melamine powder, and modifying the novel melamine powder by using pentaerythritol to reduce the free amount of formaldehyde. According to the present invention, the novel melamine resin is synthesized by replacing the conventionally used formaldehyde and melamine with the 2,4,6-triaminopyrimidine and theformaldehyde , such that the carcinogenicity caused by the dissociation of the melamine can be avoided by replacing the conventional melamine, the price is more affordable compared with the formaldehyde and the melamine, and high economic benefit can be achieved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a melamine composite material with low free formaldehyde content, a preparation method thereof and melamine tableware. Background technique [0002] Melamine resin, also known as melamine-formaldehyde resin (MF for short), is a linear or branched polymer produced by dehydration polycondensation of melamine and formaldehyde. Using melamine-formaldehyde resin as the base material, adding cellulose, pigments and other additives to make melamine-formaldehyde molding compound (commonly known as melamine powder), melamine powder is widely used to make tableware, electrical components, sanitary ware, house decoration materials, etc. [0003] Melamine tableware is also called melamine tableware. The raw material is melamine formaldehyde molding compound. Melamine powder is made by mixing MF with a-cellulose and other additives, drying, ball milling and sieving. The appearance ...

Claims

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Application Information

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IPC IPC(8): C08G12/40C08L61/32C08L1/02A47G19/02
CPCC08G12/40C08L61/32A47G19/02C08L1/02
Inventor 郑玉婴林梅金刘威林凡怡吴清楚
Owner 福建威鹏实业有限公司
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