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A color-changing additive for making white or light-colored marks and its preparation method

A technology for changing additives and additives, which is applied in the field of color-changing additives and its preparation, which can solve the problems of inability to realize white or light-colored polymers of different colors and limit applications, and achieve simple operation, low energy consumption, and easy preparation Simple and efficient process

Active Publication Date: 2022-04-05
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the color-changing additives in the prior art can only mark black polymers in light colors, and cannot realize white or light-color marks on polymers of different colors, which greatly limits its application.

Method used

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  • A color-changing additive for making white or light-colored marks and its preparation method
  • A color-changing additive for making white or light-colored marks and its preparation method
  • A color-changing additive for making white or light-colored marks and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Laser absorber: silver powder, particle size (D 50 ) is 0.4 μm;

[0052] Thermoplastic polymers: polyoxymethylene (POM), Shenhua MC90, a polyoxymethylene copolymer;

[0053] Carrier polymer: ethylene-octene copolymer (POE), DuPont 8200;

[0054] Put 80 parts by weight of polyoxymethylene, 10 parts by weight of silver powder and 10 parts by weight of ethylene-octene copolymer in a high-speed mixer and mix them uniformly; then add the above-mentioned mixture to a twin-screw extruder for blending and extrusion, and granulate. That is, the laser color-changing additive of the present invention is obtained. The temperature during the blending and extrusion process is controlled at 180°C to 230°C;

[0055] Next, the obtained laser color-changing auxiliary agent is added to polypropylene resin particles at 2wt%, and 0.1wt% of pigment red 254 (organic red) is added at the same time, and then blended by a twin-screw extruder, granulated, and extruded The temperature is 170°C...

Embodiment 2

[0057] Laser absorber: silver powder, particle size (D 50 ) is 0.4 μm;

[0058] Thermoplastic polymers: polyoxymethylene (POM), Shenhua MC90, a polyoxymethylene copolymer;

[0059] Carrier polymer 1: ethylene-octene copolymer (POE), DuPont 8200;

[0060] Carrier polymer 2: Ethylene-methyl acrylate-glycidyl methacrylate copolymer, DuPont PTW.

[0061] 80 parts by weight of polyoxymethylene, 10 parts by weight of silver powder, 7 parts by weight of ethylene-octene copolymer, and 3 parts by weight of ethylene-methyl acrylate-glycidyl methacrylate copolymer are placed in a high-speed mixer and mixed uniformly; The above-mentioned mixed materials are added to a twin-screw extruder for blending and extruding, and granulated to obtain the laser color-changing additive of the present invention. The temperature during the blending and extrusion process is controlled at 180°C to 230°C;

[0062] Next, the obtained laser color-changing auxiliary agent is added to polypropylene resin p...

Embodiment 3

[0064] Laser absorber: silver powder, particle size (D 50 ) is 0.4μm; titanium dioxide, particle size (D 50 ) is 0.6 μm;

[0065] Thermoplastic polymers: polyoxymethylene (POM), Shenhua MC90, a polyoxymethylene copolymer;

[0066] Carrier polymer 1: ethylene-octene copolymer (POE), DuPont 8200;

[0067] Carrier polymer 2: Ethylene-methyl acrylate-glycidyl methacrylate copolymer, DuPont PTW.

[0068] 80 parts by weight of polyoxymethylene, 8 parts by weight of silver powder, 2 parts by weight of titanium dioxide, 7 parts by weight of ethylene-octene copolymer, and 3 parts by weight of ethylene-methyl acrylate-glycidyl methacrylate copolymer are placed in a high-speed mixer Mix evenly; then add the above-mentioned mixture into a twin-screw extruder for blending and extrusion, and granulate to obtain the laser color change additive of the present invention. The temperature during the blending and extrusion process is controlled at 180°C to 230°C;

[0069] Next, the obtained ...

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Abstract

The invention discloses a color change additive, which comprises the following raw materials in parts by weight: 0.05 to 10.00 parts of a laser absorber, 20.00 to 80.00 parts of a thermoplastic polymer, and 10.00 to 79.95 parts of a carrier polymer; the thermoplastic polymer The material is polyacrylate resin, polyoxymethylene resin, styrene-acrylonitrile resin, acrylate-styrene resin or ABS resin. The invention further discloses the use of the color-changing assistant for marking on colored polymers. Experiments have proved that after a certain amount of the color-changing additive of the present invention is added to polymers of different colors, light-colored to white marks can be efficiently marked on polymers of different colors; moreover, the present invention discloses the preparation of the color-changing additive The method is simple, easy to operate, safe, environment-friendly and low in energy consumption, is very suitable for industrial large-scale production, and has good economic benefits.

Description

technical field [0001] The invention belongs to the field of polymer material additives, in particular to a color-changing additive used to mark white or light-colored patterns and characters on colored polymers and a preparation method thereof. Background technique [0002] Laser marking is a method of irradiating materials with high-energy lasers, resulting in carbonization, discoloration, vaporization, foaming, etc. on the surface of materials and leaving permanent marks. Compared with traditional methods, such as ink printing, screen printing, embossing, hot stamping, etc., laser marking has the advantages of high precision, no contact, high efficiency, low cost and clean and pollution-free, so it is gradually becoming a popular marking method Way. [0003] In order to achieve laser marking, laser color-changing additives are usually added to the material to be marked. However, the current laser marking method can only generate white or light-colored marks on the surfa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L59/04C08L23/08C08K3/08C08K3/22C08L23/12C08L23/06C08L25/12C08L55/02
CPCC08L59/04C08L23/12C08L23/06C08L55/02C08K2003/0806C08K2003/2241C08L2205/03C08L2205/035C08L23/08C08K3/08C08K3/22C08L23/0815C08L23/0884C08L25/12
Inventor 周涛冯金
Owner SICHUAN UNIV