WO2019074329A2

WO2019074329A2 - Polyamide resin composition and resin-molded product comprising same

Info

Publication number: WO2019074329A2
Application number: PCT/KR2018/012055
Authority: WO
Inventors: 김도균; 김태영; 황신영; 백지원
Original assignee: 에스케이케미칼 주식회사
Priority date: 2017-10-12
Filing date: 2018-10-12
Publication date: 2019-04-18
Also published as: KR20190041429A; KR102615183B1; WO2019074329A3

Abstract

The present invention provides a polyamide resin composition that comprises a polyamide resin, a polyester resin, and a compatibilizer and which exhibits environmentally friendly flame-retardant properties while having improved electric properties and thermal resistance.

Description

【Specification】

Title of the Invention

Polyamide resin composition and resin molded article containing the same

TECHNICAL FIELD

Cross-reference with related application (s)

This application claims the benefit of priority based on Korean Patent Application No. 10-2017- 0132739, filed on October 12, 2017, the entire contents of which are incorporated herein by reference.

The present invention relates to a polyamide resin composition, and more particularly, to a polyamide resin composition having environmentally friendly flame retardancy while having improved electrical properties and heat resistance.

BACKGROUND ART [0002]

The polyamide resins represented by nylon 6 and nylon 66 have various characteristics such as mechanical strength, heat resistance, abrasion resistance, and chemical resistance, and are thus attracting attention as materials applicable to various industries.

However, the polyamide resin has a disadvantage in that it has poor long-term dimensional stability and mechanical properties are deteriorated when water is absorbed. In particular, CTI (comparative ive tracking index), which is one of electrical characteristics, has a disadvantage as a virtual countermeasure.

Further, the melting points of nylon 6 and nylon 66 are relatively low at 230 ° C and 260 ° C, respectively, and thus they have insufficient heat resistance for application to semiconductor processing equipment, circuit boards, automobiles, and aircraft components.

Studies for solving the above problems have been progressing steadily, and for example, blending with another polymer resin having excellent heat resistance and hardly changing physical properties even at a relatively high humidity has been considered.

However, the polyamide resin has poor compatibility with other polymer resins, and even if blended, it may cause defects in the extrusion process, and the physical properties of the produced polymer resin molded article are likely to fall short of a desired level.

That is, since the polyamide resin and the other polymer resin are rarely easily compatible with each other, it is possible to satisfy desired physical properties, It is difficult to obtain a polyamide resin.

DETAILED DESCRIPTION OF THE INVENTION

[Technical Problem]

An object of the present invention is to provide a polyamide resin composition which is based on blending of a polyamide resin and a polyester resin and which has excellent compatibility and has an improved electrical property and heat resistance and a low saturated water content, And a polyamide resin composition in which the deterioration of physical properties is prevented.

[Technical Solution]

In order to achieve the above object, the present inventors have found that blending a high heat-resistant thermoplastic polyester resin and a polyamide resin which are excellent in electrical characteristics (CTI) and heat resistance and hardly change physical properties under long-term moisture absorption conditions, A polyamide resin composition having compatibility was obtained through stable cross-linking of two resins using a polymer compatibilizer having a cross-linking structure with all of the polyester resins, and the polyamide resin composition thus prepared had compatibility And it has been found that there is almost no deterioration of physical properties, and that a low saturated water content, electrical characteristics and heat resistance are greatly improved, thereby completing the present invention.

Hereinafter, the polyamide resin composition according to a specific embodiment of the present invention will be described in more detail.

Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately And should be construed in light of the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the configurations shown in the embodiments described herein are merely the most preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.

In this specification, the singular forms " a " Includes one, plural expressions. In this specification, the terms "comprises", "having", "having", and the like are intended to specify the presence of stated features, integers, steps, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, components, or combinations thereof.

The polyamide resin composition according to one embodiment of the present invention is a polyamide resin composition,

Polyamide resins;

Polyester resin; And

And a polymer compatibilizer having at least one repellent group which reacts with both the terminal group of the polyamide resin and the terminal group of the polyester resin,

The above-mentioned polyester resin for the polyamide resin

The weight ratio (= polyester resin / polyamide resin) is 0.01 or more to less than 0.7. Hereinafter, each component constituting the polyamide resin composition according to one embodiment will be described in detail.

The polyamide resin is not particularly limited but may be polyamide 6 or polyamide 66,

It is omitted from the description.

The polyester resin can be obtained by polycondensation of terephthalic acid with 1,4-cyclohexanedimethyl alcohols (CHDM) by polycondensation of polycyclohexenylsilylene dimethylene terephthalate (Po 1 ycyc 1 ohexy lenedi methyl ene terephthalate (PCT) resin, and may be a polycycloucleus silylene dimethylene terephthalate resin modified with isophthalic acid or an anhydride thereof. The polycyclohexenylsilylene dimethylene terephthalate resin has a crystallization rate slower than polybutylene terephthalate (PBT)

It is much faster than polyethylene terephthalate (PET), can be injection molded, has high heat resistance, and has a relatively high price competitiveness, potentially having a very high potential for use. In addition, the water absorption rate of the polyamide-based polymer is low and the discoloration resistance by heat is excellent.

Accordingly, when the polyamide resin composition according to the present invention contains When a polycyclohexanediyl methylene terephthalate resin is contained as a polyester resin, a low saturated water absorption rate is achieved, while having an improved heat resistance, as compared with the case of a plamide resin alone,

Comparat ive Tracking Index (CTI), that is, under chemical conditions,

The electrical properties for being able to withstand a relatively high voltage can be improved.

However, when the ratio of the polycyclohexylene silylene dimethylene terephthalate in the composition ratio of the polyamide and the polycyclohexanediyl methylene terephthalate resin is excessively low, the desired electrical characteristics and heat resistance are not guaranteed, while the excessively high The mechanical properties of the composition, in particular, the tensile strength, the flexural strength, and the tensile strength, etc., may be greatly reduced. Therefore, in the polyamide resin composition according to one embodiment of the present invention, the weight ratio of the polyester resin to the polyamide resin (= polyester resin / polyamide resin) is 0.01 or more to less than 0.7, Ratio is relatively high, preferably 0.2 or more to 0.6 or less, and more preferably 0.25 or more to less than 0.54.

However, the inventors of the present invention have found that the polyamide resin has low compatibility with the polyester resin, so that it is difficult to achieve the desired physical properties with the simple blend of the resins, and the processing characteristics of the water- Respectively.

Accordingly, the polyamide resin composition according to one embodiment of the present invention may include a polymer compatibilizer having at least one repellent group which is opposite to the terminal group of the polyamide resin and the terminal group of the polyester resin have.

Such a polyamide resin composition has a molecular structure in which the above-mentioned polyester resin and the polyamide resin are connected via a compatibilizer, whereby the lowering of the molecular weight of the polyamide resin composition is suppressed and the physical properties can be maintained in a desired form have.

The polymer compatibilizing agent having a repellent group is preferably a polymeric compatibilizer having a terminal group of the polyester resin, more specifically, a terminal group of a polycycloalkanediyl methylene terephthalate resin A glycidyl group capable of counteracting the terminal group of the polyamide resin and preventing the molecular weight from lowering, and more specifically, a methacrylate glycidyl group as a semi-permanent group.

The polymer compatibilizing agent having the methacrylate glycidyl group as a semi-permanent group may be an unsaturated nitrile-aromatic vinyl-glycidyl (meth) acrylate

Acrylate-glycidyl methacrylate copolymer grafted with glycidyl (meth) acrylate can be used as the crosslinking agent, May be a styrene-acrylate-glycidyl methacrylate copolymer.

When the polymer compatibilizing agent having the above reactor is included in an excessively low content, it is difficult to realize the desired compatibility, and when it is contained in an excessively high content, the polyamide resin composition

Molecular weight increase due to crosslinking may occur rapidly, which may cause problems of unnecessary formation of carbides and poor extrusion process.

Accordingly, in the present invention, the polymer compatibilizing agent having a repulsive group is added in an amount of 0.01 to 2.0% by weight, more specifically 0.1 to 1.0% by weight, more specifically 0.3 By weight to 0.7% by weight.

In addition, the polyamide resin composition according to the above-

An antistatic agent, an antistatic agent, an antistatic agent, a flame retardant, an antioxidant, a pigment, a dye and a nucleating agent.

As the dye, materials such as anthraquinone, perineone, and methine may be considered, and any one or two or more of them may be used. When the above-mentioned dye is further included, it may be contained in an amount of 0.01 to 2 parts by weight, or 0.01 to 1 part by weight, or 0.01 to 0.5 parts by weight, based on 100 of the total weight of the resin composition have.

The antioxidant suppresses the yellowing of the polymer resin to improve the appearance of the polyamide resin composition and the molded article, . Examples of the antioxidant include phenol-based antioxidants, phosphorus-based antioxidants, sulfur-based antioxidants, and hindered amine-based light stabilizers.

A composite antioxidant comprising a monomer having both a phenol-based antioxidant and a phosphorus-based antioxidant in one molecule may be used.

As the antioxidant, a phenol-based first antioxidant and a phosphorous-based antioxidant may be used, which are excellent in coloring of the molded article due to heat or oxidation without deterioration in heat resistance, and in preventing property deterioration. Of the first antioxidant and the second phosphorus antioxidant in a weight ratio of 2: 1 to 1: 2 and black is used in a weight ratio of 1: 1 to 1: 2.

Examples of the phenolic antioxidant include 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) 5-Trimethyl-2,4,6-tris (3,5-di-tert-butyl 4-hydroxybenzyl) benzene), 1,6- Butyl-4-hydroxyphenyl) propionamido] nucleic acid (1,6-3 [3- (3,5- (^^ 6-1) 1-4- hydroxyphenyl) pr opionamido] hexane ), 1,6-bis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionamido] propane (1,6- 4- hydroxyphenyl) propionami do] ropane), ^i-tetrakis [methylene (3,5-di - tert_ butyl _ _ _{4-hydroxy-dihydro-Sinai} mate)] methane _(tetrakis _[methylene _(3, ₅ _di _ _ _ _tert bu ty 1 -4-hydr oxyhy dr o cinnamate )] methane) may have the can of ^', any one or two or more of these common compounds used and the like. Commercially available phenolic antioxidants include AO-60 from ADEKA. Specific examples of the phosphorus-based second antioxidant include phosphoric acid,

Bis (2,6-di) phosphite, triethyl phosphite, triphenyl phosphate, triethyl phosphonoacetate, bis (2,6-di-tert- (2,4-di-tert-butylphenyl) pentaerythritol-di-phosphite (1-di-tert-butylphenyl) Bis (2,4-di-tert-buty 1 pheny 1) ent r em y t y ito 1 -di -phosphite), and any one or more of these may be used. Commercially available phosphorus antioxidants include Irgafos 168 from Basf. When the content of the antioxidant in the polyamide resin composition is too high, When the total weight of the resin composition is 100, the amount of the antioxidant may be 0.01 to 5 parts by weight based on 100 parts by weight of the total weight of the resin composition, Or 0.1 part by weight to 1 part by weight, or 0.1 part by weight to 0.5 part by weight.

In addition, as the pigment is carbon black, titanium oxide, zinc oxide, zinc sulfide, zinc sulfate, barium sulfate, lithopone (lithopone, BaS0 ₄ oZnS), white lead _{(white lead, 2PbC0 3 -Pb (} 0H) 2), carbonate Calcium, and alumina. Any one or two or more of these layers may be used. When the total weight of the resin composition is further included, the pigment may be included in an amount of 0.01 to 5 parts by weight, or 0.1 to 1 part by weight, or 0.1 to 0.5 parts by weight, based on 100 of the total weight of the resin composition .

The nucleating agent functions as a nucleus of crystallization during molding of the resin composition to improve the crystallization rate of the resin composition and to improve the heat resistance and injection moldability of the blended polyester resin composition. Specific examples of the nucleating agent include salts of talc / organometallic salt, sorbic acid metal salt, phosphate metal salt, quinacridone, calcium carboxylate, montane metal salt, amide organic compound, boron nitride (boron nitride , boron nitride) or talc, and any one or two or more of them may be used. Among them, boron nitride, which is an inorganic nucleating agent, can be used in consideration of the remarkable improvement effect of the use of the nucleating agent, and IND-11 of Spear Advanced Materials Company can be used in the case of a commercially available inorganic nucleating agent.

When the above-mentioned nucleating agent is further included, it may be contained in an amount of 0.01 to 5 parts by weight, or 0.1 to 1.0 parts by weight, or 0.1 to 0.5 parts by weight, based on 100 of the total weight of the resin composition have.

The flame retardant may be a phosphorus-based flame retardant, and the phosphorus flame retardant is eco-friendly and has an advantage of being excellent in compatibility with a polyamide resin and a polyester-based resin and excellent in fluidity, in place of a halogen-based flame retardant.

The phosphorus flame retardant includes, for example, trimethyl phosphate, triethyl phosphate, triphenyl Phosphate (T _r i phenyl phosphateJPP), tricresyl phosphate (Tricresyl phosphate, TCP), a tree is greater silane carbonyl phosphate (Trixylenyl phosphate, TXP), resorcinol bis (diphenylphosphino page bit) [(diphenyl phosphate) Resorcinolbis, RDP], phenyl diresorcinolphosphate, bisphenol di phenyl phosphate (BDP), cresyl di phenyl phosphate, xylylenyl diphenyl

Phosphate (Xylenyl di phenyl phosphate), Fe ^"carbonyl

Di (isopropylphenyl) phosphate [Phenyldi (isopropylphenyl) phosphate], triisophenylphosphate, diphenylphosphate

(Di phenyl phosphate), Resorcinol di Phosphate, and Aromatic Polyphosphate, but is not limited thereto.

Commercially available phosphorus flame retardants include OP-1230 and 0P-1240 manufactured by Clariant, and 0P-1230 or 0P-1240 may be used alone for the compatibility of the polyamide resin and the polyester resin , Or a mixture thereof can be used.

The inventors of the present invention have found that when a phosphorus flame retardant suitable for the polyamide resin and a phosphorus flame retardant suitable for the polyester are used in combination, the flame retardancy of the polyamide resin composition is more excellent.

The phosphorus flame retardant may be added in an amount of 5 to 25 wt%, more preferably 10 to 25 wt%, based on the total weight of the polyamide resin composition,

And more specifically from 14% by weight to 22% by weight.

The anti-drip agent may be exemplified by silica (also serving as a reinforcing filler), asbestos, and fibril lating-type fluoropolymers.

As the fluorinated polymer, poly (tetrafluoroethylene), tetra

Fluoroethylene / hexafluoropropylene copolymers,

Fluorinated polyolefins such as tetrafluoroethylene / ethylene copolymer, poly (vinylidene fluoride), poly (chlorotrifluoroethylene) and the like, and waxes containing at least one of the above-mentioned antifriction agents.

In addition, FS-200, a commercially available nanotec company, Can be considered as an inhibitor.

When the above-mentioned antistatic agent is further included, the total weight of the resin composition

100, 0.01 to 5 parts by weight, or 0.1 to 1 part by weight, or 0.1 to 0.5 parts by weight, based on the weight of the composition. The polyamide resin composition according to one embodiment of the present invention is a polyamide resin composition,

A phosphorus-based flame retardant in an amount of 5 to 25 wt%, more specifically 10 to 25 wt%, and more specifically 14 to 22 wt%, based on the total weight of the polyamide resin composition, and

0.1 to 1.0 parts by weight, more specifically 0.1 to 0.5 parts by weight, more specifically 0.1 to 0.3 parts by weight, of a nucleating agent relative to 100 parts by weight of the polyamide resin composition .

The content of the phosphorus flame retardant should be carefully considered because the addition of the phosphorus flame retardant is proportional to the improvement of the flame retardancy. However, the excessive addition of the phosphorus flame retardant causes the mechanical properties of the polyamide resin composition, , Bending strength, heat resistance and impact strength

It can be a cause of deterioration.

Therefore, the inventors of the present invention have found that when the phosphorus-based flame retardant is used in a content range of 5 wt% to 25 wt%, as described above, , When the polyamide resin composition had a thickness of 0.4 to 3.0 mm, V-0, which is the highest flame retardancy, was secured, and the above-mentioned mechanical properties were maintained at a level at which commercialization was possible.

Particularly preferably, in the polyamide resin composition according to an embodiment of the present invention, the phosphorus-based flame retardant may be added in an amount of 10% by weight to 25% by weight, more specifically 14: 3 by weight to 22% by weight .

In addition, as described above, it is preferable to use a combination of the first phosphorus flame retardant suitable for the polyamide resin and the second phosphorus flame retardant suitable for the polyester, and the content of the first phosphorus flame retardant and the second phosphorus flame retardant The sum may fall within the above-mentioned content range.

In the case of the nucleating agent, the polyamide according to one embodiment of the present invention The crystallization of the resin composition is enhanced and the flame retardancy and the heat resistance can be improved. However, when the amount is too large, the mechanical properties, particularly the tensile strength, of the polyamide resin composition may be lowered.

Therefore, the amount of the nucleating agent is preferably in the range of 0.1 to 1.0 parts by weight, more preferably 0.1 to 0.5 parts by weight, based on 100 parts by weight of the polyamide resin composition according to one embodiment of the present invention. 0.1 part by weight to 0.3 part by weight. According to another embodiment of the present invention, a molded article manufactured using the polyamide resin composition may be provided.

The molded product may be produced by various molding methods such as injection molding, extrusion molding, extrusion blow molding, injection blow molding and profile extrusion molding, and post-processing such as thermoforming using the molding method, Can be obtained by molding.

The specific shape and size of the molded article are not particularly limited, but may be, for example, a shape such as a film, a sheet, a container, or a pellet. Interior and exterior parts, electrical and electronic parts including connectors, construction materials, textiles, and sports equipment.

DETAILED DESCRIPTION OF THE INVENTION

Best Mode for Carrying Out the Invention Hereinafter, the function and effect of the present invention will be described in more detail through specific examples of the present invention. It is to be understood, however, that these embodiments are merely illustrative of the invention and are not intended to limit the scope of the invention.

The materials used in the following Examples and Comparative Examples are as follows:

Polyamide-6: 1011BRT from Hyosung Co.

Polyamide 66: Ul tramid C31 01 from BASF

Polycyclone Nuclear Silane Dimethyleneterephthalate (PCT): manufactured by SK Chemical Co.

S YPURA 0302

Phosphorous Flame Retardant 1: 0P-1230 from Clar iant

Phosphorus flame retardant 2: 0P-1240 from Clar iant

Commercialization 1: Joncryl 4368C from BASF (styrene-acrylate-glycidyl Methacrylate copolymer)

Phenolic primary antioxidant: ADEKA A0-60

Secondary antioxidant: BASF's Irgafos 168

Anti-drip agent: FS-200 from Han NanoTec Co.

Nucleating agent: IND-11 from Spear Advanced Materials Co., Ltd.

Example 1

Polyamide-66 in an amount of 69.5% by weight, polycyclohexanediyldimethylene

, 30 parts by weight of terephthalate (PCT) and 0.5 part by weight of compatibilizing agent 1, 15 parts by weight of a phenol-based primary antioxidant and 0.15 parts by weight of a phosphorus-based secondary antioxidant were added to a twin screw extruder 40 thigh, L / D = 44) to prepare pellets.

Example 2

Polyamide-66 in an amount of 63.5% by weight, polycyclohexanediyldimethylene

16% by weight of terephthalate (PCT), 0.5% by weight of compatibilizing agent 1,

, 15 parts by weight of a phenol-based primary oxidation stabilizer, 0.15 parts by weight of a phosphorus-based secondary oxidation stabilizer, and 0.20 parts by weight of an anti-drip agent were added to a resin composition consisting of phosphorus-based flame retarding agent 1 (for nylon) 40 mm, L / D = 44) to prepare pellets.

Example 3

Polyamide-66 in an amount of 63.5% by weight, polycyclohexanediyldimethylene

Terephthalate (PCT) 16 Weight 1% 0.5%

16 weight% of phosphorus flame retarding agent 1 (for nylon) and 4 weight% of phosphorus flame retarding agent 2 (for fliester) 0. 15 parts by weight of phenol-based primary oxidation stabilizer, 0.1 part by weight of phosphorus- And 0.20 parts by weight of an antifogging agent were uniformly extruded by using a twin screw extruder (?: 40 mm, L / D = 44) to prepare pellets.

Example 4

Polyamide-66 in an amount of 63.5% by weight, polycyclohexanediyldimethylene

16% by weight of phosphorus flame retarding agent 1 (for nylon) and 4% by weight of phosphorus flame retarding agent 2 (for polyester), 0.15 parts by weight of a phenol-based primary oxidation stabilizer, 0.15 parts by weight of a secondary oxidation stabilizer, 0.20 parts by weight of an anti-dripping agent and 0.1 part by weight of a nucleating agent were uniformly extruded using a twin screw extruder (Φ: 40 隱, L / D = 44) to prepare pellets.

Example 5

Polyamide-6 in an amount of 63.5% by weight, polycyclohexanediyldimethylene

16 wt% of phosphorus flame retarding agent 1 (for nylon), 4 wt% of phosphorus flame retarding agent 2 (for polyester), 0. 15 parts by weight of phenol-based primary oxidation stabilizer, 0.1 part by weight of phosphorus- , 0.20 parts by weight of an antifogging agent and 0.1 part by weight of a nucleating agent were uniformly extruded using a twin screw extruder (?: 40 psi, L / D = 44) to prepare pellets.

Example 6

24.5 wt% of polycyclohexenylsilylene dimethylene terephthalate (PCT), 0.5 wt% of compatibilizing agent 1,

, 15 parts by weight of a phenol-based primary oxidation stabilizer, 0.15 parts by weight of a phosphorus-based secondary oxidation stabilizer, and 0.20 parts by weight of an anti-drip agent were added to a resin composition consisting of phosphorus-based flame retarding agent 1 (for nylon) 40 hours, L / D = 44) to prepare pellets.

Example 7

63.0% by weight of polyamide-66, 16% by weight of polycyclohexanediyl methylene terephthalate (PCT), 1.0% by weight of compatibilizing agent 1,

, 15 parts by weight of a phenol-based primary oxidation stabilizer, 0. 15 parts by weight of a phosphorus-based secondary oxidation stabilizer, and 0.20 parts by weight of an anti-drip agent were added to a resin composition consisting of phosphorus flame retarding agent 1 (for nylon) , L / D = 44) to prepare pellets.

Comparative Example 1

0.1 part by weight of a phenolic primary oxidation stabilizer and 0.15 part by weight of a phosphorus secondary stabilizer were added to a resin composition consisting of 100% by weight of polycyclohexanediyl methylene terephthalate (PCT) in a twin screw extruder , L / D = 44) to prepare pellets. Comparative Example 2

0. 15 parts by weight of a phenol-based primary oxidation stabilizer and 0.15 parts by weight of a phosphorus-based secondary oxidation stabilizer were added to a resin composition consisting of 100% by weight of polyamide-66

The pellets were prepared by uniformly extruding using a twin screw extruder (Φ: 40 mm, L / D = 44).

Comparative Example 3

0.1 part by weight of a phenol-based primary oxidation stabilizer and 0.15 parts by weight of a phosphorus-based secondary oxidation stabilizer were added to a resin composition consisting of 100% by weight of polyamide-6

Pellets were prepared by uniformly extruding using a twin screw extruder (Φ: 40 隱, L / D = 44).

Comparative Example 4

70% by weight of polyamide-66, polycyclohexanediyldimethylene

To the resin composition consisting of 30 wt% of terephthalate (PCT), 0.15 parts by weight of a phenol-based primary oxidation stabilizer and 0.15 parts by weight of a phosphorus-

Comparative Example 5

A resin composition comprising 80% by weight of polyamide-66 and 20% by weight of phosphorus-based flame retarding agent 1 (for nylon) was added with 0.15 parts by weight of a phenol primary oxidation stabilizer, 0.15 parts by weight of a phosphorus secondary oxidation stabilizer, The parts were extruded through a twin screw extruder (Φ:

40 mm, L / D = 44) to prepare pellets.

Comparative Example 6

64% by weight of polyamide-66, 64% by weight of polycyclohexanediyldimethylene

16% by weight of terephthalate (PCT), 20% by weight of phosphorus flame retarding agent 1 (for nylon)

, 0. 15 parts by weight of a phenol-based primary oxidation stabilizer, 0.15 parts by weight of a phosphorus-based secondary oxidation stabilizer, and 0.20 parts by weight of an anti-dropping agent were mixed in a twin screw extruder (陸:

40 mm, L / D = 44) to prepare pellets.

Test Example 1: Evaluation of mechanical properties of resin composition

The mechanical properties of the polymeric resin compositions prepared in Example 1, Comparative Example 1 and Comparative Example 2 were evaluated, and the results are shown in Table 1 below. [Table 1]

It was confirmed that the comparative example 1 using the polyester resin alone had significantly lower mechanical properties as compared with the example 1 and the comparative example 2 using the polyamide resin alone exhibited almost similar mechanical properties.

In addition, Example 1 and a compatibilizer and polycyclohexanediyldimethylene

Compared with Comparative Example 2 in which terephthalate (PCT) was not separately added, it can be seen that the composition of Example 1 has remarkably improved heat resistance.

Test Example 2: Drop test of resin composition, compatibility, heat resistance, flame retardancy and CTI, evaluation of saturated water content

The physical properties of the polymer resin compositions prepared in Examples 2 to 5 and Comparative Examples 1 to 6 were evaluated, and the results are shown in Table 2 below.

[Table 2]

Table 2 summarizes the following results. First, in Examples 2 to 7, which included a compatibilizer of the styrene-acrylate-glycidyl methacrylate copolymer ¹ 'component,

The molded article based on the polyamide resin composition did not show defects such as cracks or breakage as a result of a drop test, and it can be understood that excellent physical properties are inherent based on relatively excellent compatibility.

On the other hand, drop-test of the molded articles based on the resin compositions of Comparative Example 4 and Comparative Example 6 in which the compatibilizer was not added resulted in obvious defects, which were not satisfied with the desired compatibility, .

Second, the molded articles based on the polyamide resin compositions of Examples 2 to 7 were compared with those of Comparative Examples 2 to 3 composed of a polyamide resin alone or Comparative Example 4 which did not separately contain a compatibilizer, It can be seen that the heat resistance is remarkably improved.

Particularly, in Example 5 and Comparative Example 3 in which direct comparison is possible, it can be confirmed that the resin composition composed of the polyamide-6 resin and the polyester resin has better heat resistance than the polyamide-6 resin alone. It should be noted that in Example 5, the heat resistance was improved despite containing a flame retardant.

Third, it can be seen that the polyamide resin compositions of Examples 2 to 7 have a relatively low saturated moisture content as compared with Comparative Examples 2 and 3 composed of a polyamide resin alone.

As a result, it can be understood that the polyamide resin compositions of Examples 2 to 7 overcome the limitation of the polyamide resin in which mechanical properties are deteriorated when water is absorbed.

Fourth, the polyamide resin compositions of Examples 2 to 4, Examples 6 and 7 have an excellent flame retardant grade, and in particular, the flame retardant 1 for the polyamide resin and the flame retardant for the polyester resin 2 and Example 4, which are added in combination, have the highest flame retardancy.

On the other hand, in the case of Comparative Example 6, although the flame retardant was added, It can be seen that the flame retardancy is relatively poor.

For reference, in Comparative Example 5, excellent flame retardancy was secured, but CTI characteristics and saturated moisture content were poor.

Fifth, in the case of Examples 2 to 4, 6 and 7, it can be seen that CTI characteristics corresponding to the highest grade are possessed. In Comparative Example 5, which can be directly compared with this, Specifically,

The CTI characteristics were not obtained due to the absence of the polycyclohexylene silylene dimethylene terephthalate resin, and in the case of Comparative Example 6, the CTI characteristics were secured, but it was found that there was a problem in the flame retardancy.

In summary, the polyamide composition comprising a polyamide resin, a polyester resin, and a compatibilizing agent of the " styrene-acrylate-glycidyl methacrylate copolymer " component has a mechanical property similar to that of a well-known polyamide resin While maintaining improved heat resistance, flame retardancy, CTI characteristics, and saturated moisture content, while using polyester alone, polyamide alone, or

&Quot; Styrene-acrylate-glycidyl methacrylate copolymer "

In the absence of a compatibilizer, the above properties are not improved, so that the intended effect of the present invention is difficult to achieve.

[Industrial applicability]

The polyamide resin composition according to the present invention comprises a polyamide resin and a polyester resin and has an improved heat resistance and a high mechanical strength, a low saturated water absorption rate, an improved CTI and an improved electrical property, And a compatibilizing agent including a reactor connecting the resin and the fliester resin, and has a high compatibility.

Claims

Claims:

Claim 11

Polyamide resins;

Polyester resin; And

The above-mentioned polyester resin for the polyamide resin

And a weight ratio (= a polyester resin / a polyamide resin) of not less than 0.degree.

[Claim 2]

In Item 1,

In the polyamide resin,

Polyamide 6, or polyamide 66. [

[3]

In the first aspect,

Wherein the polyester resin is a polycyclohexenylsilylene dimethylene terephthalate resin.

Claim 4

The method according to claim 1,

The polymer compatibilizing agent having the above reactor is a styrene-acrylate copolymer having a methacrylate glycidyl group as the semi-insulating polymer.

[Claim 5]

The method according to claim 1,

The polymer compatibilizer having the above-mentioned repellent group may be a polyamide resin By weight, based on the total weight of the composition, of the polyamide resin composition.

[Claim 6]

The method according to claim 1,

Wherein the weight ratio of the polyester resin to the polyamide resin is 0.2 or more to 0.6 or less.

[7]

The method according to claim 1,

Wherein the weight ratio of the polyester resin to the polyamide resin is from 0.25 or more to less than 0.54.

8.

The method according to claim 1,

A flame retardant, an antioxidant, a pigment, a dye, and a nucleating agent, wherein the polyamide resin composition further comprises at least one additive selected from the group consisting of an antistatic agent, an anti-dripping agent, a flame retardant,

[Claim 9]

18. The method of claim 18,

The anti-

Wherein the antioxidant comprises a phenol-based antioxidant and a phosphorus-based antioxidant in a weight ratio of 2: 1 to 1: 2.

Claim 10

The method according to claim 1,

5 to 25% by weight, based on the total weight of the polyamide resin composition, of a phosphorus-based flame retardant; and

Based on 100 parts by weight of the polyamide resin composition 100, 0.1 part by weight to 1.0 By weight based on the total weight of the polyamide resin composition.

[Claim 11]

A molded article comprising the polyamide resin composition according to any one of claims 1 to 10.