CN105017748A - Halogen-free, flame-retardant and ultra-hard plastic alloy and preparation method thereof - Google Patents

Abstract

The invention relates to halogen-free, flame-retardant and ultra-hard plastic alloy. The alloy comprises polycarbonate, polybutylene terephthalate, fire retardant, flexibilizer, coupling agents, antioxidant and lubricant. The preparation method includes the steps that A, all the components are taken according to the composition of the plastic alloy; B, the flame retardant, the flexibilizer, the coupling agents, the antioxidant, the lubricant and dispersing agents are added with the polycarbonate and the polybutylene terephthalate as the matrix, the mixture is mixed in a mixing machine; C, the mixture obtained through mixing is placed in a screw extruder and is melted, mixed and extruded to obtain the granular halogen-free, flame-retardant and ultra-hard plastic alloy. The halogen-free, flame-retardant and ultra-hard plastic alloy does not contain halogen and meets the requirement for environment protection. Under the condition that the use performance is ensured, the impact strength is greatly improved. The halogen-free, flame-retardant and ultra-hard plastic alloy has excellent toughness and high flame retardant performance and is good in system mechanical property, heat resistance and processing performance.

Description

The superhard plastic cement Alloy And Preparation Method of a kind of halogen-free flameproof

Technical field

The present invention relates to polymeric material field, particularly the superhard plastic cement Alloy And Preparation Method of a kind of halogen-free flameproof.

Background technology

Plastic cement alloy utilizes the method for physical blending or chemical graft and a class novel material of the high-performance obtained, functionalization, customizations.Plastic cement alloy product can be widely used in the fields such as automobile, electronics, precision instrument, office equipment, wrapping material, material of construction.It can improve or improve the performance of existing plastics and reduce costs, and has become one of kind enlivened the most in plastics industry.General plastic gummed gold, as PVC (polyvinyl chloride), PE (polyethylene), PP (polypropylene), PS (polystyrene) alloy etc., although have comparatively superior performance, but hardness still have impact on its use range, in the higher equipment of ask for something and instrument, quite high to the hardness requirement of plastic cement alloy, this has just become polymeric material field to need the major issue solved.

Summary of the invention

In order to solve the problem of prior art, embodiments providing the existing plastic cement alloy rigidity of a kind of solution relatively low, equipment component and the superhard plastic cement Alloy And Preparation Method of the halogen-free flameproof of instrument to the problem of hardness requirement can not be met.Described technical scheme is as follows:

On the one hand, embodiments provide the superhard plastic cement alloy of a kind of halogen-free flameproof, the superhard plastic cement alloy of described halogen-free flameproof is made up of following component by weight percentage:

Polycarbonate: 65 ~ 70%;

Polybutylene terephthalate: 20 ~ 25%;

Fire retardant: 5 ~ 10%;

Toughner: 2 ~ 5%;

Coupling agent: 1 ~ 3%;

Antioxidant: 0.1 ~ 0.5%;

Lubricant: 0.3 ~ 0.7%; The moisture content of described polycarbonate is less than or equal to 0.1%;

The moisture content of described polybutylene terephthalate is less than or equal to 0.1%;

Described fire retardant is Resorcinol-bis-(diphenyl phosphate) polycondensate;

The resin that described toughner is methyl methacrylate, divinyl, styrene copolymer are formed;

Described antioxidant comprises phenolic antioxidant [β-(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol tetrathioglycollate and phosphite ester kind antioxidant (2,4 di-tert-butyl-phenyl) tris phosphite;

Described lubricant is ethylene bis stearamide.

On the other hand, embodiments provide the preparation method of the superhard plastic cement alloy of a kind of halogen-free flameproof, the preparation method of the superhard plastic cement alloy of described halogen-free flameproof comprises the following steps:

A: weight percent according to claim 1 takes each moiety;

B: with polycarbonate and polybutylene terephthalate for matrix, add fire retardant, toughner, coupling agent, oxidation inhibitor lubricant and dispersion agent, mixes 3 ~ 5 minutes in mixing machine;

C: the mixture be mixed to get is placed in twin screw extruder, extrudes through melting mixing, obtains the superhard plastic cement alloy of granular halogen-free flameproof.

The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:

Halogen-free flameproof of the present invention superhard plastic cement alloy is not halogen-containing, meet environmental requirement, under the condition ensureing use properties, shock strength is greatly improved, and possesses excellent toughness, higher flame retardant properties, system mechanical property, resistance toheat and processing characteristics are good, and plastic cement alloy preparation method technique of the present invention is simple, convenient for production, can produce in enormous quantities, for applying of product of the present invention provides good basis.

Embodiment

For making the object, technical solutions and advantages of the present invention clearly, below embodiment of the present invention is described further in detail.

Embodiment one

The embodiment of the present invention one provides the superhard plastic cement alloy of a kind of halogen-free flameproof, and the superhard plastic cement alloy of described halogen-free flameproof is made up of following component by weight percentage:

Polycarbonate (being called for short PC): 65 ~ 70%;

Polybutylene terephthalate (being called for short PBT): 20 ~ 25%;

Fire retardant: 5 ~ 10%;

Toughner: 2 ~ 5%;

Coupling agent: 1 ~ 3%;

Antioxidant: 0.1 ~ 0.5%;

Lubricant: 0.3 ~ 0.7%.

The moisture content of polycarbonate is less than or equal to 0.1%.

The moisture content of polybutylene terephthalate is less than or equal to 0.1%.

Fire retardant is Resorcinol-bis-(diphenyl phosphate) polycondensate.

The resin that toughner is methyl methacrylate, divinyl, styrene copolymer are formed.

Antioxidant comprises phenolic antioxidant [β-(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol tetrathioglycollate and phosphite ester kind antioxidant (2,4 di-tert-butyl-phenyl) tris phosphite.

Lubricant is ethylene bis stearamide.

Embodiment two

The embodiment of the present invention two provides the superhard plastic cement alloy preparation method of a kind of halogen-free flameproof, and the superhard plastic cement alloy preparation method of described halogen-free flameproof comprises the following steps:

A: weight percent according to claim 1 takes each moiety;

B: with polycarbonate and polybutylene terephthalate for matrix, add fire retardant, toughner, coupling agent, oxidation inhibitor lubricant and dispersion agent, mixes 3 ~ 5 minutes in mixing machine;

C: the mixture be mixed to get is placed in twin screw extruder, extrudes through melting mixing, obtains the superhard plastic cement alloy of granular halogen-free flameproof.

In step C, the optimum configurations of twin screw extruder is as follows: district's temperature: 230 ~ 235 DEG C, two district's temperature: 240 ~ 245 DEG C, three district's temperature: 250 ~ 255 DEG C, four district's temperature: 250 ~ 260 DEG C, five district's temperature: 240 ~ 245 DEG C, six district's temperature: 230 ~ 235 DEG C, 1 ~ 2 minute residence time, engine speed: 300 ~ 350rpm.Through the plastic alloy material performance that the method obtains as table 1shown in:

table 1: particular product performance parameters of the present invention

Test event	Data unit	Testing method	Modified engineering materials
				Density	g/cm3	ASTMD-792	1.22
Tensile strength	MPa	ASTMD-638	62
				Flexural strength	MPa	ASTMD-790	94
Modulus in flexure	MPa	ASTMD-790	2450
				IZOD notched Izod impact strength	Kg.cm/cm	ASTMD-256	38
Melt flow rate (MFR) (MIR)	g/10min	ASTMD-1238	16.8
				Heat-drawn wire	℃	ASTMD-648	110
Density	g/cm3	ASTMD-792	1.22
				Rockwell hardness	R-Scale	ASTMD-785	116
Residues of combustion	％	ISO3451	0.17
				Flame retardant properties	CLASS	UL94	V0

From table 1can find out, the toughness, flame retardant resistance, system mechanical property, thermotolerance etc. of product of the present invention all improve a lot.

The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:

Halogen-free flameproof of the present invention superhard plastic cement alloy is not halogen-containing, meet environmental requirement, under the condition ensureing use properties, shock strength is greatly improved, and possesses excellent toughness, higher flame retardant properties, system mechanical property, resistance toheat and processing characteristics are good, and plastic cement alloy preparation method technique of the present invention is simple, convenient for production, can produce in enormous quantities, for applying of product of the present invention provides good basis.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (2)

1. the superhard plastic cement alloy of halogen-free flameproof, is characterized in that,

The superhard plastic cement alloy of described halogen-free flameproof is made up of following component by weight percentage:

Polycarbonate: 65 ~ 70%;

Polybutylene terephthalate: 20 ~ 25%;

Fire retardant: 5 ~ 10%;

Toughner: 2 ~ 5%;

Coupling agent: 1 ~ 3%;

Antioxidant: 0.1 ~ 0.5%;

Lubricant: 0.3 ~ 0.7%;

The moisture content of described polycarbonate is less than or equal to 0.1%;

The moisture content of described polybutylene terephthalate is less than or equal to 0.1%;

Described fire retardant is Resorcinol-bis-(diphenyl phosphate) polycondensate;

The resin that described toughner is methyl methacrylate, divinyl, styrene copolymer are formed;

Described antioxidant comprises phenolic antioxidant [β-(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol tetrathioglycollate and phosphite ester kind antioxidant (2,4 di-tert-butyl-phenyl) tris phosphite;

Described lubricant is ethylene bis stearamide.

2. a preparation method for the superhard plastic cement alloy of halogen-free flameproof according to claim 1, is characterized in that, the preparation method of the superhard plastic cement alloy of described halogen-free flameproof comprises the following steps:

A: weight percent according to claim 1 takes each moiety;

B: with polycarbonate and polybutylene terephthalate for matrix, add fire retardant, toughner, coupling agent, oxidation inhibitor lubricant and dispersion agent, mixes 3 ~ 5 minutes in mixing machine;

C: the mixture be mixed to get is placed in twin screw extruder, extrudes through melting mixing, obtains the superhard plastic cement alloy of granular halogen-free flameproof.