KR102193879B1 - Resin molded article and part for camera module containing the same - Google Patents

Abstract

A resin molded article, a component for a camera module including the same, and a method of manufacturing the resin molded article are disclosed. The resin molded article has excellent fluidity, adhesion, surface hardness and roughness, and has particle-free properties, and thus can be favorably used as a component for a camera module. The resin molded article includes a polyamide and an additive, wherein the additive includes a copolymer of compounds represented by chemical formula 1 and chemical formula 2, respectively.

Description

Resin molded products and parts for camera modules including them {RESIN MOLDED ARTICLE AND PART FOR CAMERA MODULE CONTAINING THE SAME}

The present invention relates to a resin molded article, a component for a camera module including the same, and a method of manufacturing the resin molded article.

Recently, with the advent of autonomous vehicles, the importance of image sensors has been highlighted, and a plurality of camera modules must be installed in order to cope with complex and diverse surrounding environments that occur during driving at various angles. In addition, the importance of the camera module is increasing day by day in mobile phones as the function of the camera develops day by day.

In this regard, representative polymer materials currently used in injection molding due to the small size and thin film of the camera module are liquid crystal polymer (LCP) and polyamide 9T (PA9T). However, the LCP has good fluidity but poor weld strength and adhesiveness, and PA9T has good adhesiveness, but has difficulty in the molding process due to gas generation due to moisture absorption. For this reason, it is urgent to develop a new material for camera modules that can solve both the shortcomings of LCP and PA9T.

Accordingly, the inventors of the present invention were researching for the development of the new material for the camera module, and when reaction-extrusion was performed by mixing a copolymer of a compound represented by Formulas 1 and 2 in polyamide, a camera with a performance that exceeded the fluidity of LCP was imparted. The present invention has been completed by discovering that a module component can be manufactured, and in addition, a camera module having ultra-high flow properties, excellent adhesion, surface hardness and roughness, and particle-free material performance can be manufactured.

In this regard, Korean Patent Registration No. 10-1436164 discloses a resin molded article that can be used for a component for a camera module and a method of manufacturing the same.

The present invention was conceived to solve the above-described problem, and an embodiment of the present invention provides a resin molded article.

In addition, another embodiment of the present invention provides a component for a camera module including the resin molded article.

In addition, another embodiment of the present invention provides a method of manufacturing the resin molded article.

The technical problem to be achieved by the present invention is not limited to the technical problems mentioned above, and other technical problems that are not mentioned can be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. There will be.

As a technical means for achieving the above technical problem, one aspect of the present invention,

Polyamide (PA); And an additive; including,

The additive provides a resin molded article comprising a copolymer of a compound represented by the following Formula 1 and Formula 2, respectively.

[Formula 1]

In Formula 1, R1 and R2 are each independently a straight-chain or branched C1-C20 alkyl, a straight-chain or branched C2-C20 alkenyl, or a straight-chain or branched C1-C20 alkoxy.

[Formula 2]

In Formula 2, R1 to R6 are each independently hydrogen, a hydroxy group, a straight or branched C1-C10 alkyl, a straight or branched C1-C10 alkoxy, or a straight or branched C1-C10 carboxyalkyl.

In Formula 1, R1 and R2 are each independently a straight-chain or branched C1-C10 alkyl, a straight-chain or branched C2-C10 alkenyl, or a straight-chain or branched C1-C10 alkoxy, and R1 to R4 in the formula 2 Is independently a hydroxy group, a straight or branched C1-C10 alkyl, a straight or branched C1-C10 alkoxy, or a straight or branched C1-C10 carboxyalkyl, and R5 and R6 may each be hydrogen. .

In Formula 1, R1 and R2 are each independently a straight or branched C1-C5 alkyl or a straight or branched C1-C5 alkoxy, and in Formula 2, R1 and R3 are each independently a hydroxy group, a straight-chain or branched Chain C1-C10 alkyl, straight or branched C1-C10 alkoxy or straight or branched C1-C10 carboxyalkyl, and R2 and R4 to R6 may each be hydrogen.

In Formula 1, R1 and R2 are each independently a straight-chain or branched C1-C5 alkyl, and in Formula 2, R1 and R3 are each independently a straight-chain or branched C1-C10 carboxyalkyl, and R2 and R4 to R6 Each may be hydrogen.

The content of the compound represented by Formula 2 may be in the range of 20 parts by weight to 40 parts by weight based on 1 part by weight of the compound represented by Formula 1 above.

The content of the additive may be from 20 parts by weight to 40 parts by weight based on 100 parts by weight of the polyamide.

The resin molded article may further include a colorant, an antioxidant, and a mineral filler.

In addition, another aspect of the present invention,

It provides a component for a camera module including the resin molded article.

In addition, another aspect of the present invention,

Preparing a copolymer by mixing the compounds represented by the following Chemical Formulas 1 and 2; And extruding the prepared copolymer and polyamide (polyamide, PA) into an extruder.

[Formula 1]

In Formula 1, R1 and R2 are each independently a straight-chain or branched C1-C20 alkyl, a straight-chain or branched C2-C20 alkenyl, or a straight-chain or branched C1-C20 alkoxy.

[Formula 2]

In Formula 2, R1 to R6 are each independently hydrogen, a hydroxy group, a straight or branched C1-C10 alkyl, a straight or branched C1-C10 alkoxy, or a straight or branched C1-C10 carboxyalkyl.

According to an embodiment of the present invention, the resin molded article has excellent fluidity, adhesion, surface hardness and roughness, and has a particle-free property, and thus can be usefully used as a component for a camera module.

In addition, the resin molded product has physical properties that can compensate for each of the disadvantages of liquid crystal polymer (LCP) and polyamide 9T (PA9T) used as components for existing camera modules. , Since it can be manufactured easily with a simple process, it can be widely applied and put into practical use in the future camera module parts market.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

Hereinafter, the present invention will be described in more detail. However, the present invention may be implemented in various different forms, and the present invention is not limited by the embodiments described herein, and the present invention is only defined by the claims to be described later.

In addition, terms used in the present invention are used only to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the entire specification of the present invention, "including" a certain component means that other components may be further included rather than excluding other components unless otherwise specified.

The first aspect of the present application,

Polyamide (PA); And an additive, wherein the additive comprises a copolymer of a compound represented by the following Chemical Formulas 1 and 2, respectively.

[Formula 1]

(In Formula 1, R1 and R2 are each independently straight or branched C1-C20 alkyl, straight or branched C2-C20 alkenyl, or straight or branched C1-C20 alkoxy.)

[Formula 2]

(In Formula 2, R1 to R6 are each independently hydrogen, a hydroxy group, a straight or branched C1-C10 alkyl, a straight or branched C1-C10 alkoxy, or a straight or branched C1-C10 carboxyalkyl. )

In addition, the second aspect of the present application,

It provides a component for a camera module including the resin molded article according to the first aspect of the present application.

Hereinafter, a resin molded article according to the first aspect of the present application and a component for a camera module according to the second aspect will be described in detail.

In the exemplary embodiment of the present disclosure, the resin molded product may mean a raw material in the form of a pellet obtained by concentrating and dispersing a basic polyamide raw material and an additive to be added to a high concentration. That is, a plastic product having a desired function may be manufactured by processing and molding a polyamide raw material and the additive, and the product may be used as a component for a camera module.

In one embodiment of the present application, preferably R1 and R2 in Formula 1 are each independently straight or branched C1-C10 alkyl, straight or branched C2-C10 alkenyl or straight or branched C1-C10 alkoxy In Formula 2, R1 to R4 are each independently a hydroxy group, a straight or branched C1-C10 alkyl, a straight or branched C1-C10 alkoxy, or a straight or branched C1-C10 carboxyalkyl, and R5 And R6 may each be hydrogen.

In one embodiment of the present application, more preferably R1 and R2 in Formula 1 are each independently straight or branched C1-C5 alkyl or straight or branched C1-C5 alkoxy, and R1 and R3 in Formula 2 Are each independently a hydroxy group, a straight or branched C1-C10 alkyl, a straight or branched C1-C10 alkoxy, or a straight or branched C1-C10 carboxyalkyl, and R2 and R4 to R6 are each hydrogen. I can.

In one embodiment of the present application, even more preferably R1 and R2 in Formula 1 are each independently a straight or branched C1-C5 alkylene, and R1 and R3 in Formula 2 are each independently a carboxy group, or Linear or branched C1-C10 carboxyalkyl, and R2 and R4 to R6 may each be hydrogen.

Preferred examples of the compounds represented by Formulas 1 and 2 according to an embodiment of the present application are shown in Formulas 3 and 4, respectively.

[Formula 3]

[Formula 4]

In one embodiment of the present application, the copolymer of the compound represented by Formulas 1 and 2 may include a carboxyl group. Specifically, to describe the resin molded article, the polyamide is in the form of a long linear chain, and each polyamide chain has an adjacent structure due to attraction, but the copolymer of the compounds represented by Formulas 1 and 2 By penetrating between each of the polyamide chains, spaces between adjacent polyamide chains are generated, and thus the fluidity of the resin molded article including the same may be improved.

In one embodiment of the present application, the polyamide may be polyamide 6, polyamide 66, polyphthalamide (PPA), polyamide 6T, polyamide 9T, polyamide 10T, polyamide 11 or polyamide 12, Preferably, it may be polyamide 66.

In one embodiment of the present application, the content of the compound represented by Formula 2 may be 20 parts by weight to 40 parts by weight, preferably 25 parts by weight to 35 parts by weight, based on 1 part by weight of the compound represented by Formula 1 It may be negative, and more preferably 30 to 35 parts by weight. When the content of the compound represented by Formula 2 is out of the above range with respect to 1 part by weight of the compound represented by Formula 1, the content of the compound represented by Formula 2 is too small or too large, so that the compound represented by Formula 1 The coalescence may not be formed well.

In one embodiment of the present application, the content of the additive may be from 20 parts by weight to 40 parts by weight, preferably from 25 parts by weight to 35 parts by weight, more preferably from 100 parts by weight of the polyamide. It may be 30 parts by weight. If the content of the additive is less than 20 parts by weight based on 100 parts by weight of the polyamide, the amount of the additive may be too small to facilitate the bonding between the end group of the polyamide and the carboxyl group of the additive. Too much content may cause a problem in that a bond between carboxyl groups in the additive is formed.

In one embodiment of the present application, the resin molded article may further include a colorant, an antioxidant, and a mineral filler. In this regard, the colorant may perform a function of imparting color to the resin molded article, and the antioxidant may have a function of minimizing the modification of polyamide due to a long residence time in the process of manufacturing the resin molded article. It may be to perform. In addition, the mineral filler may be combined with the resin molded article to increase surface hardness, and may perform a function of giving a constant dimension of the manufactured resin molded article by removing directionality during injection molding during the manufacturing process. . Meanwhile, the colorant may preferably be a black colorant, and the content thereof may be 1 to 5 parts by weight based on 100 parts by weight of the polyamide. In addition, the antioxidant may preferably be one using two primary and secondary antioxidants, and the content thereof may be 0.5 parts by weight to 3 parts by weight based on 100 parts by weight of the polyamide. In addition, the mineral filler may preferably be a mineral filler having a plate-like structure, and the content thereof may be 40 to 70 parts by weight based on 100 parts by weight of the polyamide.

In one embodiment of the present application, the resin molded article may have an adhesive strength of about 10 kgf/cm ² to 20 kgf/cm ² , and a weld line strength of about 15 N to 30 N. ), a melt index of about 150 g/10min to 250 g/10min and a notched IZOD impact strength measured by ASTM D256 of about 5 kgf·cm/cm to 10 kgf·cm/cm I can. That is, the resin molded article may be very useful as a component for a camera module because it has excellent adhesion, weld line strength, fluidity, and notched Izod impact strength properties.

In one embodiment of the present application, the resin molded article may further include amorphous silica, and may further include a coupling agent.

In one embodiment of the present application, the resin molded article may further include an ultraviolet stabilizer to improve weather resistance when the polyamide and the additive are kneaded. At this time, the content of the ultraviolet stabilizer may be 0.01 parts by weight to 1 part by weight relative to 100 parts by weight of the polyamide, and if it is less than 0.01 parts by weight, the weather resistance may be lowered, and if it is more than 1 part by weight, the effect of further improving weather resistance appears. May not.

In one embodiment of the present application, the ultraviolet stabilizer is 2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol (2-(2HBenzotriazol-2-yl)-4,6 -di-tert-pentylphenol}, 3-(2H-benzotriazol-2-yl)-4-hydroxyphenethyl-alcohol {3-2HBenzotriazol-2-yl)-4-hydroxyphenethyl-alcohol}, 2-( 2H-Benzotriazol-2-yl)-4- (1,1,3,3-tetramethylbutyl)phenol (2-(2H-Benzotriazol-2-yl)-4-(1,1,3,3 -tetramethylbutyl)phenol}, 2, 4-di-tert-butyl-6-(5-chlorobenzotriazol-2-yl)phenol {2,4-di-tert-butyl-6-(5-chlorobenzotriazol-2) -yl)phenol}, 2-(2H-benzotriazol-2-yl)-4-(tert-butyl)-6-(sec-butyl)phenol {2-(2Hbenzotriazol-2-yl)-4-( tert-butyl)-6-(sec-butyl)phenol}, 3-(3-(2H-benzotriazol-2-yl)-5-t-butyl-4-hydroxyphenyl)propionate{3- (3-(2H-benzotriazole-2-yl)-5-t-butyl-4-hydroxyphenyl)propionate}, 2-benzotriazol-2-yl-4,6-di-tert-butylphenol {2-benzotriazol -2-yl-4,6-di-tert-butylphenol} and combinations thereof may include a material selected from the group consisting of.

The third aspect of the present application,

Preparing a copolymer by mixing the compounds represented by the following Chemical Formulas 1 and 2; And

Extruding by introducing the prepared copolymer and polyamide (PA) into an extruder;

It provides a method of manufacturing a resin molded article comprising a.

[Formula 1]

In Formula 1, R1 and R2 are each independently a straight-chain or branched C1-C20 alkyl, a straight-chain or branched C2-C20 alkenyl, or a straight-chain or branched C1-C20 alkoxy.

[Formula 2]

In Formula 2, R1 to R6 are each independently hydrogen, a hydroxy group, a straight or branched C1-C10 alkyl, a straight or branched C1-C10 alkoxy, or a straight or branched C1-C10 carboxyalkyl.

Detailed descriptions of the portions overlapping with the first and second aspects of the present application have been omitted, but the descriptions of the first and second aspects of the present application may be equally applied even if the description is omitted in the third aspect. .

Hereinafter, a method of manufacturing the resin molded article according to the third aspect of the present application will be described in detail step by step.

First, in one embodiment of the present application, the method of manufacturing the resin molded article includes preparing a copolymer by mixing a compound represented by Chemical Formula 1 and Chemical Formula 2, respectively.

In one embodiment of the present application, the step of preparing the copolymer may be performed by injecting a compound represented by Formula 1 and Formula 2 into an extruder, and the type of the extruder is not limited, but for example For example, it may be to use a twin-screw reaction extruder of L/D=52:1.

In one embodiment of the present application, preferably R1 and R2 in Formula 1 are each independently straight or branched C1-C10 alkyl, straight or branched C2-C10 alkenyl or straight or branched C1-C10 alkoxy In Formula 2, R1 to R4 are each independently a hydroxy group, a straight or branched C1-C10 alkyl, a straight or branched C1-C10 alkoxy, or a straight or branched C1-C10 carboxyalkyl, and R5 And R6 may each be hydrogen.

In one embodiment of the present application, more preferably R1 and R2 in Formula 1 are each independently straight or branched C1-C5 alkyl or straight or branched C1-C5 alkoxy, and R1 and R3 in Formula 2 Are each independently a hydroxy group, a straight or branched C1-C10 alkyl, a straight or branched C1-C10 alkoxy, or a straight or branched C1-C10 carboxyalkyl, and R2 and R4 to R6 are each hydrogen. I can.

In one embodiment of the present application, even more preferably R1 and R2 in Formula 1 are each independently a straight-chain or branched C1-C5 alkyl, and R1 and R3 in Formula 2 are each independently a straight-chain or branched chain C1-C10 carboxyalkyl, and R2 and R4 to R6 may each be hydrogen.

Preferred examples of the compounds represented by Formulas 1 and 2 according to an embodiment of the present application are shown in Formulas 3 and 4, respectively.

[Formula 3]

[Formula 4]

In one embodiment of the present application, the content of the compound represented by Formula 2 may be 20 parts by weight to 40 parts by weight, preferably 25 parts by weight to 35 parts by weight, based on 1 part by weight of the compound represented by Formula 1 It may be negative, and more preferably 30 to 35 parts by weight. When the content of the compound represented by Formula 2 is out of the above range with respect to 1 part by weight of the compound represented by Formula 1, the content of the compound represented by Formula 2 is too small or too large, so that the compound represented by Formula 1 The coalescence may not be formed well.

Next, in one embodiment of the present application, the manufacturing method of the resin molded article includes the step of extruding by introducing the prepared copolymer and polyamide (polyamide, PA) into an extruder.

In one embodiment of the present application, the copolymer and the polyamide may be mixed in a high speed mixer before being introduced into an extruder, and then added thereto, and the type of the extruder is not limited. For example, it may be to use a twin screw extruder of L/D=44:1.

In one embodiment of the present application, the polyamide may be polyamide 6, polyamide 66, polyphthalamide (PPA), polyamide 6T, polyamide 9T, polyamide 10T, polyamide 11 or polyamide 12, Preferably, it may be polyamide 66.

In one embodiment of the present application, the content of the copolymer may be 20 parts by weight to 40 parts by weight, preferably 25 parts by weight to 35 parts by weight, and more preferably, based on 100 parts by weight of the polyamide. May be 30 parts by weight. If the content of the copolymer is less than 20 parts by weight based on 100 parts by weight of the polyamide, the content of the copolymer is too small, so that the bonding between the end group of the polyamide and the carboxyl group of the copolymer may not be smoothly achieved, and it may exceed 40 parts by weight. In this case, since the content of the copolymer is too high, there may be a problem that a bond between carboxyl groups in the copolymer is formed.

In one embodiment of the present application, the extruding step may be extruding by further adding a colorant, an antioxidant, and a mineral filler to the extruder in addition to the copolymer and polyamide. In this regard, the colorant may perform a function of imparting color to the resin molded product, and the antioxidant may be to perform a function of minimizing the denaturation of polyamide due to a long residence time in the extruding step. I can. In addition, the mineral filler may be combined with the resin molded product to increase the surface hardness, and during the manufacturing process, the mineral filler removes directionality during extrusion (injection molding) and performs a function of giving a constant dimension of the manufactured resin molded product. Can be. Meanwhile, the colorant may preferably be a black colorant, and the content thereof may be 1 to 5 parts by weight based on 100 parts by weight of the polyamide. In addition, the antioxidant may preferably be one using two primary and secondary antioxidants, and the content thereof may be 0.5 parts by weight to 3 parts by weight based on 100 parts by weight of the polyamide. In addition, the mineral filler may preferably be a mineral filler having a plate-like structure, and the content thereof may be 40 to 70 parts by weight based on 100 parts by weight of the polyamide.

In one embodiment of the present application, the resin molded article manufactured through the manufacturing method as described above may have an adhesive strength of about 10 kgf/cm ² to 20 kgf/cm ² , and about 15 N to 30 N The weld line strength of about 150 g/10min to 250 g/10min, and a notched IZOD impact strength measured by ASTM D256 of about 5 kgf cm/cm It may be 10 kgf·cm/cm. That is, the resin molded article may be very useful as a component for a camera module because it has excellent adhesion, weld line strength, fluidity, and notched Izod impact strength properties.

Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein.

<Example> Preparation of resin molded article

1. Preparation of additives

As the first compound, propane-1,2,3-tricarboxylic acid and the second compound, isophthalic acid in a weight ratio of 3:97 (wt. %) into a twin-screw reaction extruder (L/D=52:1) and extruded to prepare an additive in the form of a copolymerized pellet.

2. Manufacture of resin molded products

After mixing 15 wt% of the additive prepared in 1., 50 wt% of polyamide 66, 1.5 wt% of black colorant, and 0.5 wt% of the first and second antioxidants in a high speed mixer, a twin screw extruder (L /D=44:1) in the main hopper. In addition, 33 wt% of a mineral filler having a plate-like structure was added to a side feeder of the twin screw extruder and then extruded to prepare a resin molded article in a pellet form.

<Comparative Example 1> Preparation of liquid crystal polymer (LCP)

A commercially available liquid crystal crystalline polymer was purchased and prepared.

<Comparative Example 2> Preparation of polyamide 9T (PA9T)

Commercially available polyamide 9T was purchased and prepared.

<Experimental Example> Measurement of physical properties

The physical properties of the resin molded article prepared in Example and LCP and PA9T prepared in Comparative Example were measured and shown in Table 1 below.

[Table 1]

As shown in Table 1 above, the resin molded article prepared in the Example had adhesive strength and weld line strength corresponding to PA9T of Comparative Example 2, and melt index and notch superior to LCP of Comparative Example 1 and PA9T of Comparative Example 2 It was confirmed that it has Izod impact strength. That is, the resin molded article manufactured in the above embodiment has superior physical properties compared to the materials of Comparative Examples 1 and 2 that have been used as components for a camera module. When used as a component for a camera module, it can replace conventional materials. It was analyzed to be able to.

Claims (9)

Polyamide (PA); And additives; including,
The additive is a resin molded article comprising a copolymer of a compound represented by the following Formula 1 and Formula 2, respectively:
[Formula 1]

(In Formula 1, R1 and R2 are each independently straight or branched C1-C5 alkylene.)
[Formula 2]

(In Formula 2, R1 and R3 are each independently a carboxy group, or a straight or branched C1-C10 carboxyalkyl, and R2 and R4 to R6 are each hydrogen.)
delete delete delete The method of claim 1,
A resin molded article wherein the content of the compound represented by Formula 2 is 20 to 40 parts by weight based on 1 part by weight of the compound represented by Formula 1.
The method of claim 1,
The resin molded article that the content of the additive is 20 parts by weight to 40 parts by weight based on 100 parts by weight of the polyamide.
The method of claim 1,
The resin molded article further comprises a colorant, an antioxidant and a mineral filler.
A component for a camera module comprising the resin molded article of claim 1.
Preparing a copolymer by mixing the compounds represented by the following Chemical Formulas 1 and 2; And
Introducing the prepared copolymer and polyamide (PA) into an extruder to extrude;
Manufacturing method of a resin molded article comprising:
[Formula 1]

(In Formula 1, R1 and R2 are each independently straight or branched C1-C5 alkylene.)
[Formula 2]

(In Formula 2, R1 and R3 are each independently a carboxy group, or a straight or branched C1-C10 carboxyalkyl, and R2 and R4 to R6 are each hydrogen.)