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Reinforced toughened melamine mold plastics and preparation method

A melamine molding compound and a technology for strengthening and toughening are applied in the field of strengthening and toughening melamine molding compound and its preparation, and can solve the problems of broken melamine tableware and shortening of service life of tableware.

Inactive Publication Date: 2017-10-24
DEQING LIANCHENG AMINO PLASTIC PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, melamine tableware has been widely used in canteens, restaurants, chain stores, etc., but due to the lack of toughness and strength in the ingredients of the existing melamine tableware making powder, after making melamine tableware, wash it During the storage process, it is easy to cause the melamine tableware to be broken to varying degrees due to collision and drop, which reduces the service life of the tableware

Method used

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  • Reinforced toughened melamine mold plastics and preparation method
  • Reinforced toughened melamine mold plastics and preparation method
  • Reinforced toughened melamine mold plastics and preparation method

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preparation example Construction

[0037] A kind of preparation method of strengthening and toughening melamine molding compound as described above, described preparation method comprises the steps:

[0038] (1) In the modified melamine formaldehyde resin obtained, triethanolamine is also added in proportion, the pH value is adjusted, the reaction is terminated and cooled to 70° C.;

[0039] (2) Kneading: Add wood cellulose, lubricant, glass fiber and the above-mentioned modified melamine formaldehyde resin in proportion to kneading together in the Z-type low-speed kneader, change the stirring direction regularly, and stir until uniform;

[0040] (3) Drying: use multi-section mesh belt hot air oven, 80-85 ℃ hot air drying, drying must be uniform, control moisture below 3.5%, drying time is about 3-4 hours;

[0041] (4) Pulverizing and ball milling: After the material is pulverized, enter the ball mill for 3-8 hours, add curing agent and pigment in this process, and complete the requirements of material densific...

Embodiment 1

[0043] Embodiment 1: The reinforced and toughened melamine molding compound of the present invention is formed by the following raw materials in the following mass percentage proportioning:

[0044]

[0045] Described modified melamine formaldehyde resin is made by following production method:

[0046] (1) Add 100 parts by mass of formaldehyde solution into the reactor, and adjust the pH value to 8.5 by adding sodium hydroxide;

[0047] (2) Addition reaction: Add 10 parts by mass of THEIC and 10 parts by mass of PEG and start to heat up, while heating up, add 90 parts by mass of melamine and heat up to 85°C for reaction;

[0048] (3) After keeping the temperature at 85° C. for 15 minutes, add 10 parts by mass of p-toluenesulfonamide, and raise the temperature to 82° C. to react to the end.

[0049] (4) Polycondensation reaction: when the resin has white precipitation with 4°C water test, the temperature is lowered to 75°C, the pH value is adjusted to 8.2, and the reaction ...

Embodiment 2

[0056] Embodiment 2: A kind of reinforced and toughened melamine molding compound according to the present invention, said melamine molding compound is made of the following raw materials through the following mass percentage ratio:

[0057]

[0058]

[0059] Described modified melamine formaldehyde resin is made by following production method:

[0060] (1) Add 100 parts by mass of formaldehyde solution into the reactor, and adjust the pH value to 8 by adding sodium hydroxide;

[0061](2) Addition reaction: add 5 parts by mass of THEIC and 5 parts by mass of PEG and start to heat up, while heating up, add 80 parts by mass of melamine and heat up to 80°C for reaction;

[0062] (3) After keeping the temperature at 80° C. for 10 minutes, add 5 parts by mass of p-toluenesulfonamide, and raise the temperature to 85° C. to react to the end point.

[0063] (4) Polycondensation reaction: When the resin has white precipitation with 4°C water test, lower the temperature to 75°C, ...

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Abstract

The invention relates to reinforced toughened melamine mold plastics and a preparation method. The melamine mold plastics are prepared from the following raw materials by weight percent: 80 to 96 percent of modified melamino-formaldehyde resin, 1 to 5 percent of glass fibers, 2 to 8 percent of wood cellulose, 1 to 6 percent of triethanolamine, 0.05 to 0.1 percent of curing agent, 0.5 to 1.0 percent of titanium dioxide, 0 to 1 percent of pigments, and the modified melamine-formaldehyde resin is prepared in the following steps: (1) adding 100 parts by weight of formaldehyde solution into a reaction kettle, adding sodium hydroxide to adjust the pH to be 8 to 9; (2) addition reaction: adding 5 to 15 parts by weight of THEIC and 5 to 15 parts by weight of PEG, beginning to heat, adding 80 to 100 parts of melamine, heating and reacting at 80 to 90 DEG C; (3) preserving the heat for 10 to 20min at the temperature of 80 to 90 DEG C, adding 5 to 15 parts by weight of para toluene sulfonamide, heating to 85 to 95 DEG C, and reacting to the end point; and (4) condensation reaction: when white precipitates are tested in the resin by utilizing the water of 4 DEG C, cooling to 75 DEG C, adjusting the pH value to 8 to 8.5, and stopping reacting.

Description

technical field [0001] The invention relates to a reinforced and toughened melamine molding compound and a preparation method thereof, which are mainly used in the production of melamine tableware and belong to the technical field of melamine tableware materials. Background technique [0002] In recent years, melamine tableware has been widely used in canteens, restaurants, chain stores, etc., but due to the lack of toughness and strength in the ingredients of the existing melamine tableware making powder, after making melamine tableware, wash it During the storage process, it is easy to cause the melamine tableware to be broken to varying degrees due to collision and drop, which reduces the service life of the tableware. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and to provide a modified melamine formaldehyde resin to strengthen and toughen the melamine powder, improve the toughness and streng...

Claims

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Application Information

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IPC IPC(8): C08L61/32C08L1/02C08K7/14C08K3/22C08G12/40
CPCC08L61/32C08G12/40C08K2003/2241C08L2205/16C08L1/02C08K7/14C08K3/22
Inventor 严明亮
Owner DEQING LIANCHENG AMINO PLASTIC PROD CO LTD
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