CN115991923A - Preparation process of automobile decorative functional film master batch - Google Patents
Preparation process of automobile decorative functional film master batch Download PDFInfo
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- CN115991923A CN115991923A CN202211718004.4A CN202211718004A CN115991923A CN 115991923 A CN115991923 A CN 115991923A CN 202211718004 A CN202211718004 A CN 202211718004A CN 115991923 A CN115991923 A CN 115991923A
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Abstract
The invention relates to the technical field of plastic master batch preparation, in particular to a preparation process of an automobile decorative functional film master batch, which comprises the following steps: s1, blending PMMA and modified silicone rubber for the first time; s2, extruding the s1 product at 230-250 ℃ to obtain PMMA modified silicone rubber; s3, secondarily blending the PMMA modified silicone rubber, the PMMA and the modifier; s4, carrying out temperature zone co-extrusion on the product of the step S3; and S5, cooling and granulating the product extruded from the step S4. After the primary blending process, the temperature is controlled at 230-250 ℃, partial PMMA resin is thermally cracked to generate an oligomer or monomer with active reactive groups, grafting reaction is carried out on the oligomer or monomer and modified silicone rubber in the extrusion process, and the modified silicone rubber chemically grafted with PMMA is prepared, so that the compatibility of the silicone rubber and PMMA is improved, and then secondary blending is carried out, so that uniform mixing is realized, and the prepared master batch has the advantages of good fluidity, low shrinkage, stable size, high strength and uniform texture, and is suitable for in-mold decoration IMD technology.
Description
Technical Field
The invention relates to the technical field of plastic master batch preparation, in particular to a preparation process of an automobile decorative functional film master batch.
Background
The automobile field rapidly develops, and the traditional exterior decoration spraying technology is difficult to meet the pursuit of users on fashion and individuation of automobile appearance. At present, the international major manufacturers of the automobile functional film are Coulter in Germany, LG in Korea and Aili in America, and the products are applied to automobile brands such as BMW, masses, audi, benz and the like and household appliance brands such as Philips, songshi, sanxingzhi and Siemens and the like, and the production of the products in China is not found. The high-function film material is used as a national strategic key material, so that the technical breakthrough capacity of the high-function film material is enhanced, the cooperative innovation capacity of an industrial chain of the high-function film material is improved, and the industrialization progress of the high-function film material is promoted.
The traditional decorative films such as PC film have the defects of poor surface hardness and chemical resistance, poor PET formability, low ductility and the like.
Disclosure of Invention
The invention aims to solve the defects of poor stability, low ductility and poor mechanical strength of the traditional decorative film, and provides a preparation process of a master batch of an automobile decorative functional film.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a preparation process of an automobile decorative functional film master batch comprises the following steps:
s1, blending PMMA and modified silicone rubber for the first time;
s2, extruding the s1 product at 230-250 ℃ to obtain PMMA modified silicone rubber;
s3, secondarily blending the PMMA modified silicone rubber, the PMMA and the modifier;
s4, carrying out temperature zone co-extrusion on the product of the step S3;
and S5, cooling and granulating the product extruded from the step S4.
And (2) blending the modified silicone rubber and PMMA in the mass ratio of 1 (0.5-2) for one time.
The proportion of PMMA in s2 that thermally cracks is 80% of the total amount of PMMA material in s 1.
s3 also comprises the following raw materials when blending: pigment filler and auxiliary agent.
And in s3, the mass ratio of PMMA modified silicon rubber to PMMA to the pigment, filler and auxiliary agent is as follows: 35:60:1:3:1.
The preparation process of the automobile decorative functional film master batch provided by the invention has the beneficial effects that: the modified silicone rubber and a small amount of PMMA are uniformly mixed, after the primary blending process, the temperature is controlled at 230-250 ℃, partial PMMA resin is subjected to thermal cracking to generate an oligomer or monomer with active reactive groups, grafting reaction is carried out on the oligomer or monomer and the modified silicone rubber in the extrusion process, the modified silicone rubber with PMMA being chemically grafted is prepared, so that the compatibility of the silicone rubber and the PMMA is improved, and then secondary blending is carried out, so that uniform mixing is realized, and the prepared master batch has the advantages of good fluidity, low shrinkage, stable size, high strength and uniform texture, and is suitable for in-mold decoration IMD technology.
Drawings
FIG. 1 is a schematic diagram of the preparation principle of PMMA grafted modified silicone rubber of the invention;
fig. 2 is a process flow diagram of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1-2, a process for preparing a master batch of an automobile decorative functional film comprises the following steps:
s1, blending PMMA and modified silicone rubber for the first time, wherein the modified silicone rubber and PMMA are blended for the first time according to the mass ratio of 1 (0.5-2);
s2, extruding the s1 product at 230-250 ℃ to obtain PMMA modified silicone rubber;
s3, secondarily blending PMMA modified silicone rubber, PMMA and a modifier, and adding pigment and filler and an auxiliary agent, wherein the mass ratio of the PMMA modified silicone rubber to the PMMA to the modifier is as follows: 35:60:1:3:1;
s4, carrying out temperature zone co-extrusion on the product of the step S3;
and S5, cooling and granulating the product extruded from the step S4.
In the process, polymethyl methacrylate is used as base resin, modified silicone rubber is used as modified resin, silicone is used as a functional film master batch formula system of a modifier, polymethyl methacrylate PMMA is used as base resin, the modified film master batch formula system has the characteristics of ageing resistance, high transparency, high glossiness, excellent corrosion resistance and excellent mechanical strength, firstly, the modified silicone rubber and a small amount of PMMA are uniformly mixed, preparation is carried out for implementation of an extrusion-grafting process and preparation of the modified silicone rubber grafted on the PMMA surface, after the primary blending process, the temperature is controlled in a higher range (230-250 ℃), part of PMMA resin is thermally cracked to generate an oligomer or a monomer with an active reaction group, the proportion of PMMA in an embodiment s2 is 80% of the total amount of PMMA raw materials in an extrusion process, grafting reaction is carried out with the modified silicone rubber, the modified silicone rubber chemically grafted with PMMA is prepared, so that compatibility of the silicone rubber and PMMA is improved, then secondary blending is carried out, a good melt blending effect is achieved through design of different temperature areas, and finally, the prepared master batch has the advantages of good fluidity, low shrinkage, high size, high quality, uniform strength and stable decoration and uniform die decoration are achieved.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any technical solution, conception and design obtained by equivalent substitution or modification of the technical solution and the inventive concept thereof by those skilled in the art within the scope of the present invention should be covered in the scope of the present invention.
Claims (5)
1. The preparation process of the automobile decorative functional film master batch is characterized by comprising the following steps of:
s1, blending PMMA and modified silicone rubber for the first time;
s2, extruding the s1 product at 230-250 ℃ to obtain PMMA modified silicone rubber;
s3, secondarily blending the PMMA modified silicone rubber, the PMMA and the modifier;
s4, carrying out temperature zone co-extrusion on the product of the step S3;
and S5, cooling and granulating the product extruded from the step S4.
2. The preparation process of the automobile decorative functional film master batch according to claim 1, wherein the modified silicone rubber in s1 and PMMA are blended for one time according to the mass ratio of 1 (0.5-2).
3. The process for preparing a masterbatch for automotive decorative functional film according to claim 1 or 2, characterized in that the proportion of thermal cracking of PMMA in s2 is 80% of the total amount of PMMA in s 1.
4. The process for preparing the master batch of the automobile decorative functional film according to claim 1, wherein the master batch is prepared from the following raw materials in blending: pigment filler and auxiliary agent.
5. The preparation process of the automobile decorative functional film master batch according to claim 4, wherein the mass ratio of PMMA modified silicone rubber, PMMA, modifier, pigment filler and auxiliary agent in s3 is as follows: 35:60:1:3:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211718004.4A CN115991923A (en) | 2022-12-29 | 2022-12-29 | Preparation process of automobile decorative functional film master batch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211718004.4A CN115991923A (en) | 2022-12-29 | 2022-12-29 | Preparation process of automobile decorative functional film master batch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115991923A true CN115991923A (en) | 2023-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211718004.4A Pending CN115991923A (en) | 2022-12-29 | 2022-12-29 | Preparation process of automobile decorative functional film master batch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115991923A (en) |
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2022
- 2022-12-29 CN CN202211718004.4A patent/CN115991923A/en active Pending
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