Preparation process of glazing powder for manufacturing melamine tableware surface antibacterial and bactericidal raw material

Abstract

The invention discloses a preparation process of glazing powder for manufacturing a melamine tableware surface antibacterial and bactericidal raw material. The process comprises the following steps: adding a modification filler subjected to surface treatment by a silane coupling agent into a prepolymer of melamine and formaldehyde, and carrying out a polycondensation reaction. According to the invention, with the technical scheme, the dispersion uniformity of the modification filler in the formed synthetic resin can be improved, and after the synthetic resin is prepared through a reaction, thesynthetic resin is dried, cured and smashed to prepare the powdery glazing powder for manufacturing the melamine tableware surface antibacterial and bactericidal raw material, so that the uniformly-dispersed modification filler has a good antibacterial effect, improves the cracking resistance of the synthetic resin is improved, and improves the effective use time and use effect of a glazing powder layer formed after the glazing powder is pressed.

Description

technical field

[0001] The invention belongs to the technical field of powder coatings, and in particular relates to a process for preparing varnish powder for producing antibacterial and sterilizing raw materials on the surface of melamine tableware. Background technique

[0002] Melamine tableware, also known as imitation porcelain tableware, is formed by heating and pressing melamine resin powder. Melamine tableware is used in the catering industry and children's catering industry due to its lightness, beauty, low temperature resistance, and non-fragile properties. Powder, also known as melamine varnish resin, is a resin formed by the reaction of formaldehyde and melamine, and the powder is dried and ball-milled. Because no pulp is added, it is commonly known as "fine powder". It is used to sprinkle some on the surface when pressing tableware to increase surface brightness. , making the tableware more beautiful and generous.

[0003] The wide application of melamine tabl...

Examples

Embodiment 1

[0027] A process for preparing varnish powder for producing antibacterial and sterilizing raw materials on the surface of melamine tableware, comprising the steps of:

[0028] In the first step, melamine and a formaldehyde solution with a volume concentration of 36% are added to the reaction kettle according to the proportion, and hexamethylenetetramine is added thereto, and stirred and reacted for 8 minutes under the condition of 400 r / min in room temperature environment, so that the melamine and The formaldehyde solution is fully mixed evenly, and the dosage ratio of melamine, formaldehyde solution and hexamethylenetetramine is 50mL: 31.5g: 0.13g;

[0029] The second step is to raise the temperature to 80°C and keep warm until the mixed system of melamine and formaldehyde solution is clarified, then continue to keep warm for 20 minutes to obtain a soluble trimethylol compound of melamine, to which triethanolamine is added dropwise to adjust the pH of the reaction system When...

Embodiment 2

[0041] A process for preparing varnish powder for producing antibacterial and sterilizing raw materials on the surface of melamine tableware, comprising the steps of:

[0042] In the first step, melamine and a formaldehyde solution with a volume concentration of 36% are added to the reaction kettle in proportion, and hexamethylenetetramine is added thereto, and stirred and reacted for 5-12 minutes at room temperature and at a speed of 400 r / min, so that The melamine and formaldehyde solution are thoroughly mixed evenly, and the dosage ratio of melamine, formaldehyde solution and hexamethylenetetramine is 50mL: 31.5g: 0.12-0.15g;

[0043] In the second step, heat up to 80°C and keep warm until the mixed system of melamine and formaldehyde solution is clarified, then continue to keep warm for 25 minutes to obtain a soluble trimethylol compound of melamine, to which triethanolamine is added dropwise to adjust the pH of the reaction system When the value reaches 8-9, the reaction ...

technical field

[0001] The invention belongs to the technical field of powder coatings, and in particular relates to a process for preparing varnish powder for producing antibacterial and sterilizing raw materials on the surface of melamine tableware. Background technique

[0002] Melamine tableware, also known as imitation porcelain tableware, is formed by heating and pressing melamine resin powder. Melamine tableware is used in the catering industry and children's catering industry due to its lightness, beauty, low temperature resistance, and non-fragile properties. Powder, also known as melamine varnish resin, is a resin formed by the reaction of formaldehyde and melamine, and the powder is dried and ball-milled. Because no pulp is added, it is commonly known as "fine powder". It is used to sprinkle some on the surface when pressing tableware to increase surface brightness. , making the tableware more beautiful and generous.

[0003] The wide application of melamine tabl...

Examples

Embodiment 1

[0027] A process for preparing varnish powder for producing antibacterial and sterilizing raw materials on the surface of melamine tableware, comprising the steps of:

[0028] In the first step, melamine and a formaldehyde solution with a volume concentration of 36% are added to the reaction kettle according to the proportion, and hexamethylenetetramine is added thereto, and stirred and reacted for 8 minutes under the condition of 400 r / min in room temperature environment, so that the melamine and The formaldehyde solution is fully mixed evenly, and the dosage ratio of melamine, formaldehyde solution and hexamethylenetetramine is 50mL: 31.5g: 0.13g;

[0029] The second step is to raise the temperature to 80°C and keep warm until the mixed system of melamine and formaldehyde solution is clarified, then continue to keep warm for 20 minutes to obtain a soluble trimethylol compound of melamine, to which triethanolamine is added dropwise to adjust the pH of the reaction system When...

Embodiment 2

[0041] A process for preparing varnish powder for producing antibacterial and sterilizing raw materials on the surface of melamine tableware, comprising the steps of:

[0042] In the first step, melamine and a formaldehyde solution with a volume concentration of 36% are added to the reaction kettle in proportion, and hexamethylenetetramine is added thereto, and stirred and reacted for 5-12 minutes at room temperature and at a speed of 400 r / min, so that The melamine and formaldehyde solution are thoroughly mixed evenly, and the dosage ratio of melamine, formaldehyde solution and hexamethylenetetramine is 50mL: 31.5g: 0.12-0.15g;

[0043] In the second step, heat up to 80°C and keep warm until the mixed system of melamine and formaldehyde solution is clarified, then continue to keep warm for 25 minutes to obtain a soluble trimethylol compound of melamine, to which triethanolamine is added dropwise to adjust the pH of the reaction system When the value reaches 8-9, the reaction ...