Methyl methacrylate resin with excellent thermal stability

Abstract

The invention relates to methyl methacrylate resin with excellent thermal stability. The methyl methacrylate resin is prepared from the following components in parts by weight: 100 parts of methyl methacrylate resin, 0.1-0.5 part of an antioxidant and 0.1-2.0 parts of halogenated phosphine derivative. Compared with the prior art, the methyl methacrylate resin has the advantages that since a small amount of halogenated phosphine derivative is adopted, the thermal stability of PMMA can be greatly improved, the original excellent property of PMMA is not damaged, and meanwhile, the preparation method is simple, the cost is low, and the methyl methacrylate resin has very important industrial application significance.

Description

technical field

[0001] The invention relates to the field of thermoplastic polymers, in particular to a methyl methacrylate resin with excellent thermal stability. Background technique

[0002] Methyl methacrylate resin (PMMA) has extremely high surface hardness and mechanical strength, super high weather resistance, can be used directly outdoors, has good coloring performance, and also has extremely excellent appearance properties and light transmittance. It has the advantages of more than 92, so it is widely used in the fields of car lights, display panels, building materials and decorative materials in daily life.

[0003] Due to the defect structure factors such as "head-head bond" generated by coupling termination and unsaturated end group generated by disproportionation termination in PMMA resin itself during the polymerization process, PMMA has poor thermal stability and is prone to pyrolysis during molding process. Polymerization phenomenon, resulting in silver fila...

Examples

Embodiment 1

[0022] A kind of methyl methacrylate resin with excellent thermal stability, the method may further comprise the steps:

[0023] (1) Prepare materials according to the following components and parts by weight:

[0024] PMMA 100;

[0025] Antioxidant B900 0.5;

[0026] Phosphine tribromide 0.1;

[0027] (2) After stirring and mixing PMMA resin, antioxidant, and phosphine halide derivatives in a high-speed mixer, they are sent into a twin-screw extruder through a metering device, and the temperature of the twin-screw extruder is controlled at 180-230°C. Under the transportation, shearing and mixing of the screw, the materials are melted and compounded, and finally through the steps of extrusion, drawing, cooling and pelletizing, the methyl methacrylate resin with excellent thermal stability is obtained.

Embodiment 2

[0029] A kind of methyl methacrylate resin with excellent thermal stability, the method may further comprise the steps:

[0030] (1) Prepare materials according to the following components and parts by weight:

[0031] PMMA resin 100;

[0032] Antioxidant B900 0.3;

[0033] Methyltriphenylphosphine bromide 0.5;

[0034] (2) preparation method is the same as embodiment 1

Embodiment 3

[0036] A kind of methyl methacrylate resin with excellent thermal stability, the method may further comprise the steps:

[0037] (1) Prepare materials according to the following components and parts by weight:

[0038] PMMA resin 100;

[0039] Antioxidant B900 0.3;

[0040] Methyltriphenylphosphine bromide 1.0;

[0041] (2) preparation method is the same as embodiment 1

technical field

[0001] The invention relates to the field of thermoplastic polymers, in particular to a methyl methacrylate resin with excellent thermal stability. Background technique

[0002] Methyl methacrylate resin (PMMA) has extremely high surface hardness and mechanical strength, super high weather resistance, can be used directly outdoors, has good coloring performance, and also has extremely excellent appearance properties and light transmittance. It has the advantages of more than 92, so it is widely used in the fields of car lights, display panels, building materials and decorative materials in daily life.

[0003] Due to the defect structure factors such as "head-head bond" generated by coupling termination and unsaturated end group generated by disproportionation termination in PMMA resin itself during the polymerization process, PMMA has poor thermal stability and is prone to pyrolysis during molding process. Polymerization phenomenon, resulting in silver fila...

Examples

Embodiment 1

[0022] A kind of methyl methacrylate resin with excellent thermal stability, the method may further comprise the steps:

[0023] (1) Prepare materials according to the following components and parts by weight:

[0024] PMMA 100;

[0025] Antioxidant B900 0.5;

[0026] Phosphine tribromide 0.1;

[0027] (2) After stirring and mixing PMMA resin, antioxidant, and phosphine halide derivatives in a high-speed mixer, they are sent into a twin-screw extruder through a metering device, and the temperature of the twin-screw extruder is controlled at 180-230°C. Under the transportation, shearing and mixing of the screw, the materials are melted and compounded, and finally through the steps of extrusion, drawing, cooling and pelletizing, the methyl methacrylate resin with excellent thermal stability is obtained.

Embodiment 2

[0029] A kind of methyl methacrylate resin with excellent thermal stability, the method may further comprise the steps:

[0030] (1) Prepare materials according to the following components and parts by weight:

[0031] PMMA resin 100;

[0032] Antioxidant B900 0.3;

[0033] Methyltriphenylphosphine bromide 0.5;

[0034] (2) preparation method is the same as embodiment 1

Embodiment 3

[0036] A kind of methyl methacrylate resin with excellent thermal stability, the method may further comprise the steps:

[0037] (1) Prepare materials according to the following components and parts by weight:

[0038] PMMA resin 100;

[0039] Antioxidant B900 0.3;

[0040] Methyltriphenylphosphine bromide 1.0;

[0041] (2) preparation method is the same as embodiment 1

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