CN-119371798-B - Polycarbonate composition and preparation method and application thereof

Abstract

The invention belongs to the field of polycarbonate materials, and particularly discloses a polycarbonate composition, a preparation method and application thereof. The polycarbonate composition provided by the invention has the light dispersing agent, the flaky filler and wollastonite with specific granularity and the polyitaconic acid grafted PMMA, so that the polycarbonate composition has excellent toughness, dimensional stability and high glossiness, and is suitable for the new requirements of the air conditioner air deflector industry.

Inventors

• Peng minle
• CHEN PINGXU
• YE NANBIAO
• LIU BO
• YANG ZHIJUN
• Cen yin
• AI JUNWEI

Assignees

• 金发科技股份有限公司

Dates

Publication Date

20260508

Application Date

20241024

Claims (9)

1. 1. The polycarbonate composition is characterized by comprising the following components in parts by weight: 100 parts of polycarbonate, 1-5 parts of flaky filler, 8-15 parts of light dispersing agent, 0.2-3 parts of wollastonite and 1-5 parts of polyitaconic acid grafted PMMA; The light dispersing agent comprises a first light dispersing agent and a second light dispersing agent, wherein the average particle size of the first light dispersing agent is 3-12 mu m, the average particle size of the second light dispersing agent is 50-80 mu m, and the second light dispersing agent accounts for 0-50% of the mass of the light dispersing agent.
2. 2. The polycarbonate composition of claim 1, wherein the polycarbonate has a melt index of 6 to 30g/10min, wherein the melt index is measured according to ISO 1133-1 2011 under 300 ℃ and 1.2kg.
3. 3. The polycarbonate composition of claim 1, wherein the platy filler comprises at least one of talc, mica powder, and glass flake.
4. 4. The polycarbonate composition of claim 1, wherein the platy filler has an average particle size of 0.65 to 11 μm.
5. 5. The polycarbonate composition of claim 1, wherein the light diffusing agent comprises at least one of a silicone-based light diffusing agent, a poly (meth) acrylic-based light diffusing agent, a polystyrene-based light diffusing agent, and a nylon-based light diffusing agent.
6. 6. The polycarbonate composition of claim 1, wherein the wollastonite has a mesh number of 325 to 1250 mesh.
7. 7. The polycarbonate composition of claim 1, wherein the polyitaconic acid is grafted with PMMA in an amount of 0.5 to 10 weight percent.
8. 8. A process for producing a polycarbonate composition according to any one of claims 1 to 7, which comprises the steps of mixing, melting, extruding, cooling and drying the raw materials to obtain the polycarbonate composition.
9. 9. Use of a polycarbonate composition according to any one of claims 1 to 7 for the preparation of air conditioner air deflector articles.

Description

Polycarbonate composition and preparation method and application thereof Technical Field The invention belongs to the field of polycarbonate materials, and particularly relates to a polycarbonate composition, a preparation method and application thereof. Background Polycarbonate (PC) is engineering plastic with excellent performance, has comprehensive performances of high mechanical strength, good impact toughness, stable size, better heat resistance, good electrical insulation and the like, and has wide application in the fields of household appliances, digital products, IT products and the like. The air conditioner air deflector member is generally a plastic member such as PC, and the shape of the air conditioner air deflector member is long and narrow, and the plastic member is subjected to the action of gravity and the hot air temperature of an air outlet in the use process for a long time, so that the plastic member is generally deformed. In order to overcome the problem, the traditional plastic air deflector needs to use an aluminum plate as a support, and forms a composite part with the traditional plastic air deflector, so that the deformation of the finished part is avoided after long-term use. In order to reduce the use of aluminum plates, reduce the cost and the weight, realize the integrally formed plastic air deflector with dimensional stability, in order to realize the low deformation of the plastic air deflector of a long product, the known solution is to improve the rigidity of the material, and the traditional solution is to add some flat or flaky fillers, such as talcum powder and the like, so as to further improve the modulus of the air deflector product, thereby reducing the deformation of the material, but the solution usually needs to add a large proportion of talcum powder (more than 15% of the mass of PC) to realize the modulus of more than or equal to 5200MPa, and the addition of a large proportion of talcum powder has limited compatibility with PC, so that in practice, the toughness of the whole material is reduced, and the uneven surface of the flaky material, such as talcum powder, can obviously reduce the glossiness of the material, and the requirement of the material on high gloss and high toughness cannot be met. Disclosure of Invention Aiming at the problems of poor structural stability, poor glossiness, poor toughness and the like of air conditioner air deflector parts in the prior art, the invention provides a polycarbonate composition, a preparation method and application thereof. In order to achieve the above purpose, the method specifically comprises the following technical scheme: In one aspect, the invention provides a polycarbonate composition comprising the following components in parts by weight: 100 parts of polycarbonate, 0.5-6 parts of flaky filler, 7-16 parts of light dispersing agent, 0.1-3.5 parts of wollastonite and 0.5-6 parts of polyitaconic acid grafted PMMA; The light dispersing agent comprises a first light dispersing agent and a second light dispersing agent, wherein the average particle size of the first light dispersing agent is 3-12 mu m, the average particle size of the second light dispersing agent is 50-80 mu m, and the second light dispersing agent accounts for 0-50% of the mass of the light dispersing agent. Wollastonite generally contains needle-shaped particle morphology and has the characteristic of high length-diameter ratio, so that the modulus of the material can be greatly improved, but the toughness and glossiness of the material are obviously reduced by the existence of the wollastonite compared with those of the flaky filler. The light diffusing agent is generally in the form of microspheres. The inventor of the invention discovers that when the light dispersing agent, the flaky filler and the wollastonite with specific granularity exist in the polycarbonate composition, a flaky, needle-shaped and spherical lapped supporting structure can be realized, the consumption of talcum powder can be reduced, the damage of impact and glossiness can be effectively reduced, and the dimensional stability of the material is ensured, while the effect of the itaconic acid grafted PMMA is that the compatibility of PMMA and PC is relatively poor, the itaconic acid grafted PMMA can preferentially migrate to the surface in a system, the defect of uneven formed by the filler is compensated to form a mirror surface, so that the glossiness is effectively improved, and the carboxyl group of itaconic acid grafted on the PMMA and the terminal hydroxyl of PC can react to form a chemical bond in the preparation process, so that the toughness of the product can be integrally improved, and the effects of high toughness, high glossiness and high dimensional stability of the polycarbonate composition are comprehensively realized. Preferably, the polycarbonate composition comprises, by weight, 100 parts of polycarbonate, 1-5 parts of a platy filler, 8-15 parts of a li