KR20070052963A - Composition of polycarbonate/acrylonitrile-butadiene-styrene alloy resin of halogen free flame retardant having antistatic - Google Patents

Abstract

The present invention relates to an anti-halogen flame retardant polycarbonate (PC) / acrylonitrile-butadiene-styrene (ABS) alloy resin composition having antistatic properties, and more particularly. (C) 1st based on 100 weight part of base resin compositions which consist of 40-80 weight% of polycarbonate resins (PC) and 20-60 weight% of (B) acrylonitrile-butadiene-styrene resins (ABS) 1 to 20 parts by weight of a phosphorus flame retardant as a flame retardant, (D) 1 to 30 parts by weight of a melamine derivative compound as a second flame retardant, and (E) 15 to 25 parts by weight of conductive carbon black. A halogen flame retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin composition.

The alloy composition according to the present invention, by using a non-halogen flame retardant and melamine derivative compound in an appropriate ratio to the polycarbonate resin and acrylonitrile-butadiene-styrene resin, excellent flame retardancy by their flame retardant synergism, conductive carbon By using black at an appropriate ratio, antistatic property is imparted, and excellent flame retardancy and antistatic property, and excellent mechanical properties can be maintained as it is, it can be usefully used in automobiles, electrical and electronic materials.

Antistatic, non-halogen, flame retardant, polycarbonate, acrylonitrile, butadiene, styrene, phosphorus flame retardant, melamine derivative compound, conductive, carbon black.

Description

Composition of Polycarbonate / Acrylonitrile-Butadiene-Styrene alloy resin of halogen free flame retardant having antistatic} (Anti-halogen flame retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin composition)

The present invention relates to an anti-halogen flame retardant polycarbonate (PC) / acrylonitrile-butadiene-styrene (ABS) alloy resin composition having antistatic properties, and more particularly. (C) 1st based on 100 weight part of base resin compositions which consist of 40-80 weight% of polycarbonate resins (PC) and 20-60 weight% of (B) acrylonitrile-butadiene-styrene resins (ABS) 1 to 20 parts by weight of a phosphorus flame retardant as a flame retardant, (D) 1 to 30 parts by weight of a melamine derivative compound as a second flame retardant, and (E) 15 to 25 parts by weight of conductive carbon black. A halogen flame retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin composition.

PC / ABS Alloy (PC / ABS Alloy) that can utilize the heat resistance of polycarbonate resin (PC) and the flow characteristics of acrylonitrile-butadiene-styrene copolymer (BS) Resin is widely used in automotive parts such as door handles, bumpers and instrument panels, as well as electrical and electronic products such as monitor housings, hard disks, printers and laptop batteries due to its excellent processing and mechanical properties. By the way, in order to be used for many different applications, PC / ABS alloy resins require flame retardancy and antistatic properties.

A conventional method used to impart flame retardancy to thermoplastic resins is a method of mixing a bromine or chlorine compound which is a halogen flame retardant. However, while halogen-based flame retardants exhibit sufficient fire retardant functions in the event of a fire, they cause mold corrosion and environmental pollution during processing. Especially, halogenated dioxins generated during fire and incineration are not only fatal to humans, but also become a major source of environmental pollution. The Swedish Confederation of professional employees restricts the use of halogen-based flame retardants.

In general, when a conductive material is added to impart conductivity to a thermoplastic resin, flame retardancy tends to decrease. In particular, as the content of carbon black or carbon fiber increases, flame retardancy decreases and conductivity changes very rapidly. There is a problem in satisfying the antistatic property at the same time.

U.S. Patent No. 6,596,199 discloses a method of compounding carbon fibers using polyamide terpolymer binders to impart antistatic properties. However, uneven antistatic properties and warpage of products after molding are caused by the orientation of carbon fibers during molding. There is a problem called warpage.

U.S. Patent No. 6,231,788 discloses a method of imparting flame retardancy and antistatic property by introducing conductive carbon black and bromine flame retardant to a conductive polyester resin, but has a problem that may cause environmental problems by using halogen flame retardant. have.

Accordingly, the present inventors have conducted research to solve the above problems, and as a result of using a phosphorus-based flame retardant and melamine derivative compound in an appropriate amount to impart flame retardancy to the PC / ABS alloy resin, it has excellent flame retardancy by the flame retardant synergism, The present invention has been completed by knowing that PC / ABS alloy resin having excellent antistatic properties and excellent mechanical properties may be manufactured by adding conductive carbon black to impart the properties.

Accordingly, an object of the present invention is to provide a PC / ABS alloy resin composition having excellent flame retardancy and antistatic property by adding a phosphorus flame retardant, a melamine derivative compound, and conductive carbon black.

Non-halogen flame retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin composition having an antistatic property according to the present invention for achieving the above object is (A) 40 to 80% by weight of polycarbonate resin (PC) And (B) 1 to 20 parts by weight of a phosphorus-based flame retardant as the first flame retardant based on 100 parts by weight of the base resin composition consisting of 20 to 60% by weight of (B) acrylonitrile-butadiene-styrene resin (ABS). 2 to 30 parts by weight of the melamine derivative compound, and (E) 15 to 25 parts by weight of the conductive carbon black as a flame retardant.

In the non-halogen flame retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin composition having an antistatic property according to the present invention, the polycarbonate resin is characterized in that the viscosity average molecular weight is 15,000 to 30,000.

In the non-halogen flame retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin composition having an antistatic property according to the present invention, the phosphorus-based flame retardant which is the first flame retardant is an alkylphosphonic acid compound represented by the structure It features.

(Wherein R is a linear or branched alkyl group having 1 to 4 carbon atoms and X is 0 or 1)

In the non-halogen flame retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin composition having an antistatic property according to the present invention, the phosphorus-based flame retardant which is the first flame retardant is more preferably contained at 3 to 15 parts by weight.

In the non-halogen flame retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin composition having an antistatic property according to the present invention, the melamine derivative compound which is the second flame retardant is more preferably contained at 5 to 15 parts by weight. do.

In the non-halogen flame retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin composition having an antistatic property according to the present invention, the melamine derivative compound which is the second flame retardant is melamine cyanurate, melamine phosphate, melamine pyrophosphate, and Melamine polyphosphate is characterized in that at least one selected from the group consisting of melamine resins.

In the non-halogen flame retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin composition having an antistatic property according to the present invention, the conductive carbon black has an average particle size of 30 to 40 nm.

In the non-halogen flame-retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin having an antistatic property according to the present invention, the alloy resin composition is a dropping inhibitor as a fluorinated polyolefin resin, an impact modifier, an inorganic additive, a heat stabilizer, It is characterized in that it further contains at least one selected from the group consisting of light stabilizers, antioxidants, mold release agents, lubricants, pigments and dyes.

Hereinafter, the present invention will be described in more detail.

The polycarbonate resin of the component (A) is prepared by reacting divalent bisphenols and phosgene in an interfacial phase, and bisphenols are most preferably bisphenol A, and a chain terminator of phenol, paracresol, or paraisooctyl phenol ( molecular weight can be controlled using a chain terminator).

In addition, it is preferable that the viscosity average molecular weight of the polycarbonate resin is 15,000 to 30,000. If the viscosity average molecular weight is less than 15,000, mechanical properties such as impact strength are lowered, and if the viscosity average molecular weight exceeds 30,000, the melt viscosity increases. This is because there is a difficulty in increasing the temperature during processing of the resin.

The content of polycarbonate resin is 40 to 80% by weight of the base resin composition, which means that when the content of the polycarbonate resin is less than 40% by weight, the tensile strength and heat resistance are lowered, and when the content exceeds 80% by weight, the melt viscosity during processing This is because the tendency to rise.

The acrylonitrile-butadiene-styrene resin of component (B) is composed of 20 wt% discontinuous polybutadiene rubber phase and 80 wt% styrene-acrylonitrile (70 wt% styrene and 30 wt% acrylonitrile) thermoplastic phase. It is a copolymer containing.

The content of acrylonitrile-butadiene-styrene resin is 20 to 60% by weight of the base resin composition, which increases the melt viscosity when the content of the acrylonitrile-butadiene-styrene resin is less than 20% by weight, causing problems in processing. This is because when the content is 60% by weight or more, the heat resistance and tensile strength are lowered.

Phosphorus-based flame retardant of the component (C) may be used as the first flame retardant, an alkyl phosphonic acid compound represented by the structure of Formula 1, used in the range of 1 to 20 parts by weight based on 100 parts by weight of the base resin composition It is used more preferably about 3 to 15 parts by weight. This is because when the amount of the phosphorus-based flame retardant is less than 1 part by weight, the flame retardant effect is insignificant, and when the amount of the phosphorus-based flame retardant is more than 20 parts by weight, the physical properties of the product are caused by the plasticizing effect and the blooming phenomenon of the flame retardant.

A typical commercial product of the alkyl phosphonic acid compound is Rhodia's antiblaze 1045 (trade name), and is mainly used as a flame retardant for fibers.

The melamine derivative compound of component (D) is a nitrogen-based flame retardant as the second flame retardant. Melamine derivative compounds show a flame retardant synergistic effect when used in combination with the phosphorus-based flame retardant as the first flame retardant.

The melamine derivative compound is used in the range of 1 to 20 parts by weight based on 100 parts by weight of the base resin composition, and more preferably about 5 to 15 parts by weight. This is because when the amount of the melamine derivative compound is less than 1 part by weight, the flame retardant effect and the synergistic effect are insignificant, and when the amount of the melamine derivative compound is more than 20 parts by weight, the physical properties and color degradation of the product are caused by the thermal decomposition of the melamine derivative compound. .

The melamine derivative compound exhibits an excellent flame retardant synergistic effect with the first flame retardant at an optimum content to reduce the overall flame retardant content, and to facilitate the processing work by minimizing the toxic gas which is a by-product generated by pyrolysis during processing. The resin composition has optimum physical properties.

The melamine derivative compound is at least one selected from the group consisting of melamine cyanurate, melamine phosphate, melamine pyrophosphate, and melamine resin of melamine polyphosphate, of which melamine cyanurate is most preferred.

The conductive carbon black of component (E) is used to impart antistatic properties, and is prepared through continuous pyrolysis by self-heating of acetylene gas (acetylene black).

The conductive carbon black is preferably more compact in structure, smaller in particle size, higher in porosity, and larger in surface area.

For example, Denka Black manufactured by Denki Kagaku Kogyo Kabushiki Kaisha may be used as the conductive carbon black. In addition, commercially available conductive carbon black may be used.

The average particle size of the conductive carbon black is 30-40 nm. This is because when the average particle size of the conductive carbon black is less than 30nm, it is difficult to show antistatic properties, and when the average particle size is more than 40nm, it is difficult to disperse in the resin.

The conductive carbon black is used in the range of 15 to 25 parts by weight based on 100 parts by weight of the basic resin composition, which is less antistatic when the amount of the conductive carbon black is less than 15 parts by weight, and the amount of use may exceed 25 parts by weight. This is because mechanical properties such as workability and impact strength are lowered.

The alloy resin composition according to the present invention is one or more selected from the group consisting of fluorinated polyolefin resin, impact modifier, inorganic additive, heat stabilizer, light stabilizer, antioxidant, release agent, lubricant, pigment and dye as anti-dropping agent as necessary It may be further included.

The non-halogen flame-retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin composition having an antistatic property according to the present invention is excellent in flame retardancy and antistatic property and can be usefully used in automobiles, electric and electronic materials.

The objects, features and advantages of the present invention will become more apparent by considering the description of preferred embodiments and experimental examples of the present invention. The following Examples and Experimental Examples are the results of measuring the properties of the non-halogen flame retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin composition having an antistatic property according to the present invention and the physical properties of the alloy composition thus prepared As an example. However, the present invention is not limited in scope by these Examples and Experimental Examples.

<Examples 1 to 4 and Comparative Examples 1 to 5>

Polycarbonate resin (PC) and acrylonitrile-butadiene-styrene resin (ABS), alkylphosphonic acid compound as a first flame retardant, and melamine cyanurate as a second flame retardant as a composition and content shown in Table 1 below. Into the mixture, the conductive carbon black was added to the secondary inlet, mixed and kneaded and extruded at a screw rotation speed of 200 rpm with a twin screw extruder at a temperature of 230 to 250 ° C. to obtain a pellet for molding. The pellet was hot-air dried at 100 ° C. for 3 hours, then injection molded at a temperature of 230 to 250 ° C. to mold the specimen, and left to stand for 24 hours in a constant temperature and humidity chamber (25 ° C., 40% relative humidity). Examples 1 to 4 and Comparative Examples Polycarbonate / acrylonitrile-butadiene-styrene alloy resin compositions of 1 to 5 were prepared.

Composition (part by weight) Example Comparative example One 2 3 4 One 2 3 4 5 Polycarbonate Resin (PC) ¹⁾ 40 40 70 80 20 40 40 40 90 Acrylonitrile-butadiene-styrene resin (ABS) ²⁾ 60 60 30 20 80 60 60 60 10 Alkyl phosphonic acid compounds ³⁾ 15 10 5 3 25 - 8 - 5 Melamine cyanurate ⁴⁾ 5 10 10 15 - - 10 30 10 RDP ⁵⁾ - - - - - 25 - - - Conductive carbon black ⁶⁾ 15 17 18 20 15 15 30 17 20 1) TREX 3020PJ (average viscosity 19,000) of Samyang Co., Ltd. 2) Teluran GP22 of BASF 3) Antiblaze 1045 (alkylphosphonic acid compound) of Rhodia 4) Budenheim (BUDIT) 315E (melamine cyanurate) of (BUDENHEIM) 5) Resorcinol diphenyl phosphate of the long sleeve chemical company 6) Denki Kagaku Kogyo Kabushiki Kaisha (DENKA BLACK) (Average particle 35nm)

Experimental Example 1

The physical properties of the polycarbonate / acrylonitrile-butadiene-styrene alloy resin prepared according to Examples 1 to 4 and Comparative Examples 1 to 5 were measured, and the results are shown in Table 2 below.

When measuring the physical properties, the impact strength was measured according to ASTM D256, tensile strength ASTM D790, flame retardant UL 94, surface resistance in accordance with the standard ASTM D257.

Properties Example Comparative example One 2 3 4 One 2 3 4 5 Tensile strength (kgf / cm ² ) 450 468 515 543 413 425 609 410 580 Impact strength (kgfm / cm) 28 20 16 14 38 20 4 6 6 Flame retardant (UL94, 1/16) V-0 V-0 V-0 V-0 - - V-2 - V-0 Surface resistance (Ω) 10 ⁸ 10 ⁷ 10 ⁶ 10 ⁶ 10 ⁶ 10 ⁹ 10 ⁷ 10 ⁹ 10 ¹²

*-: Not measurable

As shown in Table 2, the polycarbonate / acrylonitrile-butadiene-styrene alloy resin prepared according to Examples 1 to 4 according to the present invention was prepared according to Comparative Examples 1 to 5 Compared to butadiene-styrene alloy resin, the flame retardancy and antistatic property were very excellent, and it was confirmed that excellent mechanical properties were maintained.

As described above, the polycarbonate / acrylonitrile-butadiene-styrene alloy resin composition according to the present invention uses a non-halogen flame retardant and a melamine derivative compound in an appropriate ratio to the polycarbonate resin and the acrylonitrile-butadiene-styrene resin. These flame retardant synergistic properties are excellent in flame retardancy, and by using an appropriate ratio of conductive carbon black, the antistatic property is imparted, and the flame retardancy and antistatic property are excellent, and excellent mechanical properties are maintained as it is. It can be usefully used.

Claims (8)

To 100 parts by weight of the base resin composition consisting of (A) 40 to 80% by weight of polycarbonate resin (PC) and 20 to 60% by weight of (B) acrylonitrile-butadiene-styrene resin (ABS), (C) 1 to 20 parts by weight of a phosphorus-based flame retardant as the first flame retardant, (D) 1 to 30 parts by weight of the melamine derivative compound as the second flame retardant, and (E) Non-halogen flame retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin having an antistatic property, comprising 15 to 25 parts by weight of conductive carbon black. The non-halogen flame retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin having antistatic properties according to claim 1, wherein the polycarbonate resin has a viscosity average molecular weight of 15,000 to 30,000. The non-halogen flame-retardant polycarbonate / acrylonitrile-butadiene-styrene alloy having antistatic properties according to claim 1, wherein the phosphorus-based flame retardant as the first flame retardant is an alkylphosphonic acid compound represented by the structure of the following Chemical Formula 1. Resin composition. [Formula 1]

(Wherein R is a linear or branched alkyl group having 1 to 4 carbon atoms and X is 0 or 1) The non-halogen flame-retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin having an antistatic property according to claim 1 or 3, wherein the first flame retardant is a phosphorus flame retardant which is contained in an amount of 3 to 15 parts by weight. The non-halogen flame-retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin having an antistatic property according to claim 1, wherein the melamine derivative compound as the second flame retardant is contained at 5 to 15 parts by weight. The melamine derivative compound as a second flame retardant is at least one selected from the group consisting of melamine cyanurate, melamine phosphate, melamine pyrophosphate, and melamine resin system of melamine polyphosphate. Non-halogen flame retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin composition having antistatic properties. The non-halogen flame-retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin composition of claim 1, wherein the conductive carbon black has an average particle size of 30 to 40 nm. The method of claim 1, wherein the alloy resin composition is one or more selected from the group consisting of fluorinated polyolefin resin, impact modifier, inorganic additive, heat stabilizer, light stabilizer, antioxidant, release agent, lubricant, pigment and dye as anti-dropping agent A non-halogen flame-retardant polycarbonate / acrylonitrile-butadiene-styrene alloy resin composition having an antistatic property, characterized by containing.