CN107880510A - A kind of activeness and quietness halogen-free and flame-retardant polycarbonate material and preparation method thereof - Google Patents

Abstract

The invention discloses a kind of activeness and quietness halogen-free and flame-retardant polycarbonate material and preparation method thereof, the enhanced halogen-free and flame-retardant polycarbonate is made up of following components in parts by weight：100 parts of polycarbonate resin, fire retardant 0.04~0.15,0.1~0.4 part of composite antioxidant, 5~30 parts of reinforcing agent, 2~8 parts of toughener.The preparation method of the material is：Weigh the polycarbonate resin through drying process, fire retardant, composite antioxidant and toughener and pour into the mixing of mixer high speed, mixed material is sent to melting extrusion in double screw extruder, simultaneously long glass fibres is added in extruder waist exhaust outlet, the billot die head pelletizing extruded and water cooling, activeness and quietness halogen-free and flame-retardant polycarbonate material is produced by drying process.

Description

A kind of reinforced and toughened halogen-free flame-retardant polycarbonate material and its preparation method

technical field

The invention relates to a polymer material and a preparation method thereof, in particular to a reinforced and toughened halogen-free flame-retardant polycarbonate material and a preparation method thereof.

Background technique

Polycarbonate (PC) is a thermoplastic engineering plastic with excellent comprehensive properties. It has outstanding impact resistance, creep resistance and dimensional stability, heat resistance, low water absorption, non-toxicity, and excellent dielectric properties. Due to the molecular structure, polycarbonate is prone to stress cracking during the molding process, and its comprehensive mechanical properties will drop sharply after being modified by adding flame retardants, which will affect the engineering application of polycarbonate.

In the present invention, the combined use of the reinforcing agent and the toughening agent can significantly improve the comprehensive mechanical properties of the flame-retardant polycarbonate and meet the application requirements of specific application fields.

Contents of the invention

One of the purposes of the present invention is to solve the above problems, to provide a kind of reinforced and toughened non-woven fabric with simple and flexible use method, which can meet the requirements of specific application, and has good mechanical properties, heat resistance and simple production process. Halogen flame retardant polycarbonate material.

Another object of the present invention is to provide a method for preparing the above-mentioned reinforced and toughened halogen-free flame-retardant polycarbonate material.

The reinforced and toughened halogen-free flame-retardant polycarbonate material claimed in the present invention is composed of the following components by weight: 100 parts of polycarbonate resin, 0.04-0.15 parts of flame retardant, 0.1-0.4 parts of composite antioxidant, 5-30 parts of strengthening agent, 2-8 parts of toughening agent.

The preferred polycarbonate material is composed of the following components by weight: 100 parts of polycarbonate resin, 0.05 parts of flame retardant, 0.4 parts of composite antioxidant, 18 parts of reinforcing agent, and 6 parts of toughening agent.

The preferred polycarbonate material is composed of the following components by weight: 100 parts of polycarbonate resin, 0.05 parts of flame retardant, 0.4 parts of composite antioxidant, 22 parts of reinforcing agent, and 6 parts of toughening agent.

The preferred polycarbonate resin is bisphenol A-based medium-viscosity or high-viscosity polycarbonate. The preferred flame retardant is potassium perfluorobutane sulfonate; the preferred composite antioxidant consists of antioxidant 1010 and antioxidant 168 in a weight ratio of 1:3. A preferred reinforcing agent is alkali-free long glass fibers. The preferred toughening agent is a compound with cross-linked acrylate or silicone as the core and grafted methyl methacrylate as the shell.

The preparation method of polycarbonate material of the present invention comprises the following steps:

(1) Pour the dried polycarbonate resin, flame retardant, composite antioxidant and toughening agent into the mixer according to the formula and mix at high speed for 5-6 minutes, and discharge to obtain the mixed material;

(2) Feed the mixed material obtained in step (1) into a twin-screw extruder for melt extrusion, and at the same time add long glass fibers to the exhaust port in the middle of the extruder fuselage, and cut the extruded strip die The pellets and water are cooled, and the reinforced and toughened halogen-free flame-retardant polycarbonate material can be obtained through drying treatment.

The preferred temperature of each zone of the twin-screw extruder in step (2) is: T ₁ =135-145°C, T ₂ =225-235°C, T ₃ =255-265°C, T ₄ =260-270°C, T ₅ = 270-280°C, T ₆ = 280-290°C, T ₇ = 275-285°C, T ₈ = 260-270°C, T ₉ = 250-260°C, T _mode = 250-260°C.

The preferred temperature of each zone of the twin-screw extruder in step (2) is: T ₁ =140°C, T ₂ =230°C, T ₃ =260°C, T ₄ =265°C, T ₅ =275°C, T ₆ = 285°C, T ₇ =280°C, T ₈ =275°C, T ₉ =255°C, T _mode =255°C.

In the preferred step (1), the dried polycarbonate resin, flame retardant, composite antioxidant and toughening agent are weighed and poured into a mixer for high-speed mixing for 6 minutes.

The positive effect that the present invention has:

1. The reinforced and toughened halogen-free flame-retardant polycarbonate material of the present invention uses alkali-free long glass fiber reinforced polycarbonate as a reinforcing agent and has the following advantages:

(1) It can obtain good flame-retardant polycarbonate reinforcement effect and prevent stress cracking;

(2) Effectively increase the heat distortion temperature of flame-retardant polycarbonate.

2. The reinforced and toughened halogen-free flame-retardant polycarbonate material of the present invention adopts a compound with cross-linked acrylate or silicone as the core and grafted methyl methacrylate as the shell to ensure the halogen-free flame-retardant Polycarbonate material has better toughening effect and resistance to stress cracking.

Detailed ways

Example 1

The reinforced and toughened halogen-free flame-retardant polycarbonate material of this embodiment is made of the following components by weight:

25kg of polycarbonate resin, 0.0125kg of flame retardant potassium perfluorobutyl sulfonate, 0.1kg of composite antioxidant (composed of 0.025kg of antioxidant 1010 and 0.075kg of antioxidant 168), 1kg of reinforcing agent (Compounds with cross-linked acrylate or silicone as the core and grafted methyl methacrylate as the shell, the brand name of Mitsubishi Corporation is S2001.)

The preparation method of the above-mentioned reinforced and toughened halogen-free flame-retardant polycarbonate material has the following steps:

(1) Pour the dried polycarbonate resin, flame retardant, composite antioxidant and toughening agent into the mixer according to the formula and mix at high speed for 5-6 minutes, and discharge to obtain the mixed material;

(2) The mixed material obtained in step (1) is fed into a twin-screw extruder for melt extrusion, and at the same time, 2 strands of alkali-free long glass fibers (equivalent to the Add 4.5kg of non-alkali long glass fiber), the extruded strip die is cut into pellets and water cooled, and the reinforced and toughened halogen-free flame-retardant polycarbonate material is obtained through drying treatment.

In the above step (2), the temperature of each zone of the twin-screw extruder is: T ₁ =140°C, T ₂ =230°C, T ₃ =260°C, T ₄ =265°C, T ₅ =275°C, T ₆ = 285°C, T ₇ =280°C, T ₈ =275°C, T ₉ =255°C, T _mode =255°C.

Embodiment 2 to Embodiment 6

The preparation method of the reinforced and toughened halogen-free flame-retardant polycarbonate material of each example is the same as Example 1, the difference lies in the weight ratio of each component, see Table 1 for details.

Table 1: The formula ratio of embodiment 1～6

The reinforced and toughened halogen-free flame-retardant polycarbonate material obtained in Examples 1 to 6 was injected into a standard sample by an injection molding machine, and the mechanical properties of the standard sample were tested according to the national standard. The test results are shown in the table 2.

Table 2: Test results of reinforced and toughened halogen-free flame-retardant polycarbonate materials prepared by the recipes of Examples 1-6

comparative example

The preparation method of the reinforced and toughened halogen-free flame-retardant polycarbonate material of the comparative example is the same as that of Example 3 and Example 6, the difference is that the composition ratio is different, and the halogen-free flame-retardant Polycarbonate for comparison, see Table 3 for details.

Table 3: Embodiment 3, embodiment 6, comparative example prescription proportioning

Example 3 Example 6 comparative example polycarbonate resin 25kg 25kg 25kg flame retardant 0.0125kg 0.0125kg 0.0125kg Toughener 2kg 1.5kg 0 enhancer 4.5kg 5.5kg 0 Antioxidant 1010 0.025kg 0.025kg 0.025kg Antioxidant 168 0.075kg 0.075kg 0.075kg

The comparative halogen-free flame-retardant polycarbonate was injected into a standard sample with an injection molding machine, and the performance of the test was shown in Table 4 for details.

Table 4: Test results of reinforced and toughened halogen-free flame-retardant polycarbonate materials prepared by Example 3, Example 5, and Comparative Example

It can be seen from Table 4 that the present invention adopts non-alkali long glass fiber as a reinforcing agent and takes cross-linked acrylate or silicone as a core, and a compound grafted with methyl methacrylate as a shell as a toughening agent to obtain a reinforced and toughened halogen-free Compared with halogen-free flame-retardant polycarbonate, flame-retardant polycarbonate can effectively improve the comprehensive mechanical properties and heat distortion temperature of halogen-free flame-retardant polycarbonate, and has little effect on flame-retardant effect.

Claims (9)

1. a kind of activeness and quietness halogen-free and flame-retardant polycarbonate material, it is characterised in that the material is by following components in parts by weight group Into：100 parts, fire retardant 0.04-0.15 of polycarbonate resin, composite antioxidant 0.1-0.4 parts, reinforcing agent 5-30 parts, toughener 2-8 parts.

2. makrolon material according to claim 1, it is characterised in that material is made up of following components in parts by weight：It is poly- 100 parts of carbonate resin, fire retardant 0.05,0.4 part of composite antioxidant, 18 parts of reinforcing agent, 6 parts of toughener.

3. makrolon material according to claim 1, it is characterised in that material is made up of following components in parts by weight：It is poly- 100 parts of carbonate resin, fire retardant 0.05,0.4 part of composite antioxidant, 22 parts of reinforcing agent, 6 parts of toughener.

4. according to the makrolon material described in claim any one of 1-3, it is characterised in that the polycarbonate resin is double Middle viscosity or the high viscosity makrolon of phenol A classes；Described fire retardant is perfluorobutyl potassium sulfonate；Described composite antioxidant by Antioxidant 1010 and irgasfos 168 composition；Described reinforcing agent is alkali-free long glass fibres.

5. makrolon material according to claim 4, it is characterised in that described composite antioxidant is by antioxidant 1010 With irgasfos 168 according to 1: 3 weight than forming.

6. makrolon material according to claim 4, it is characterised in that described toughener is with crosslink propylene acid esters Or organosilicon is core, grafted methacrylic acid methyl esters is the compound of shell.

7. the preparation method of makrolon material according to claim 6, it is characterised in that this method includes following step Suddenly：

(1) by according to formula weigh the polycarbonate resin through drying process, fire retardant, composite antioxidant and toughener pour into it is mixed Conjunction machine high speed mixes 5~6min, discharging, obtains mixed material；

(2) mixed material obtained by step (1) is sent to melting extrusion in double screw extruder, each area of double screw extruder Temperature is：T₁=135~145 DEG C, T₂=225~235 DEG C, T₃=255~265 DEG C, T₄=260~270 DEG C, T₅=270~280 DEG C, T₆=280~290 DEG C, T₇=275~285 DEG C, T₈=260~270 DEG C, T₉=250~260 DEG C, T_Mould=250~260 DEG C, Long glass fibres, the billot die head pelletizing extruded and water cooling are added in extruder waist exhaust outlet simultaneously, by dry Dry handle produces activeness and quietness halogen-free and flame-retardant polycarbonate material.

8. the preparation method of makrolon material according to claim 7, it is characterised in that in step (2), twin-screw squeezes The temperature in Chu Jige areas is：T₁=140 DEG C, T₂=230 DEG C, T₃=260 DEG C, T₄=265 DEG C, T₅=275 DEG C, T₆=285 DEG C, T₇ =280 DEG C, T₈=275 DEG C, T₉=255 DEG C, T_Mould=255 DEG C.

9. the preparation method of makrolon material according to claim 8, it is characterised in that step (1) will be according to formula Weigh the polycarbonate resin through drying process, fire retardant, composite antioxidant and toughener and pour into the mixing of mixer high speed 6min。