Flame retardant PC / ABS composite and its preparation method and process

PC / ABS composite material has the benefits of both PC and ABS. It not only has the heat resistance, scale stability and mechanical function of PC, but also has the benefits of low viscosity, good fluidity and low cost compared with PC. It can be used as decoration material. Traditional decoration materials such as floor or wallboard are all based on marble, with heavy product weight and high cost. PC / ABS composite material has certain rigidity, excellent impact resistance and light weight. It can replace marble to produce floor or wallboard. It is an excellent decoration material.

But the products produced according to the normal way have low fire rating and flame retardant function, which can not meet the rules of national standards.

Therefore, it is an urgent problem for skilled personnel in this field to provide a PC / ABS composite material and its preparation method, so that the PC / ABS composite material not only has excellent physical and mechanical functions, but also has excellent fireproof and flame retardant functions.

Skill end elements:

In view of this, the invention provides a flame-retardant PC / ABS composite material and a preparation method thereof, the overall preparation process is simple, the repeatability is strong, and the prepared PC / ABS has excellent flame-retardant function, resistance, strength and other characteristics.

In order to end the above purpose, the invention selects the following skill plan:

The flame retardant PC / ABS composite material is characterized in that, according to the mass fraction, it includes the following components:

60-80 parts of PC / ABS, 30-40 parts of wood flour, 15-30 parts of hydroxide, 10-15 parts of expandable graphite, 10-20 parts of flame retardant polyether, 2-5 parts of plasticizer, 5-7 parts of toughener and 3-6 parts of additives.

The advantages of the above skills program are: providing a flame retardant PC / ABS composite material, which not only has excellent physical and mechanical functions, but also has excellent flame retardant functions. By blending flame retardant with PC / ABS, the composite material has excellent flame retardant function, and then can meet the requirements of safe use; Moreover, by mixing toughening agent, filling reinforcer and PC / ABS, the composite material has excellent physical and mechanical functions such as resistance and strength, and then has more excellent application prospects.

Preferably, the wood flour is oxidized wood flour, and the detailed oxidation treatment method is as follows: bake the wood flour at 260-300 ℃ for 10-15 minutes, soak it in sodium silicate saturated solution with a solid-liquid ratio of 1.5-2:0.8-1.5 for 30-40 hours, and then dry it in nitrogen environment.

The advantages of the above plan are: soaking wood flour with sodium silicate, sodium silicate is alkaline, can dissolve some low molecular impurities such as pectin, lignin and hemicellulose, and does not change the chemical structure of cellulose, so that the rotation angle of fiber is reduced, the molecular orientation moves forward, the fracture strength of fiber is improved, and then the durability and crack resistance of composite materials are improved, So that the mechanical strength of PC / ABS will not be affected by adding many kinds of flame retardant components. More importantly, after treatment with sodium silicate solution, the surface of wood flour is coated with sodium silicate, which makes the oxygen index of wood flour advance and is useful for flame retardant.

Preferably, the hydroxide is one or more of magnesium hydroxide or aluminum hydroxide.

Preferably, the flame-retardant polyether is prepared by the following methods: in a closed reverberator, inorganic fluoride, polyether, catalyst and polytetrafluoroethylene with mass ratio of 1-2:0.5-0.8:1.4-2.3:1.5-3 are added, and under non oxygen conditions, temperature is 500-700 ℃, pressure is 70-90mpa, voltage is 15-23000 V, reaction time is 1-3 hours.

The advantages of the above optimization plan are: under this condition, F ion is semi free, and flame retardant polyether releases a lot of F ions at 450 ℃ - 750 ℃ to capture the active group hydrogen ion and hydroxyl ion of high temperature differentiation and generate stable FH. This kind of reaction always accompanies the whole process of polymer differentiation until the end of differentiation, Useful to reduce the concentration of combustible gas, and then achieve the purpose of suppressing the formation of open fire.

Preferably, the plasticizer is one or more of epoxy soybean oil, RDP and BDP.

Preferably, the toughening agent is EPDM, SBS, high rubber powder and MBS

One or more of.

A preparation method of flame retardant PC / ABS composite material, which is characterized in that it is prepared by selecting the material components described in claims 1-6, and specifically includes the following process:

(1) Weigh each data of flame retardant PC / ABS composite material described in any one of claims 1-6 for standby;

(2) In the process (1), the wood powder, hydroxide, expandable graphite and flame retardant polyether are successively mixed in a high-speed mixer for 3-5min to obtain a uniform mixture;

(3) PC / ABS, plasticizer, toughening agent and additives weighed in the process (1) are successively added into the uniform mixture prepared in the process (2) for continuous high-speed mixing for 10-15min;

(4) The products in the process (3) are taken part in the shaping die of the conical twin-screw extruder and extruded to form a sheet.

Preferably, the temperature of the high-speed mixer in the process (2) is controlled at 60-80 ℃.

Preferably, the temperature of the high-speed mixer in the process (3) is controlled at 100-140 ℃.

The advantages of the above skill plan are: the preparation method is simple, the data can be mixed evenly, so that the prepared composite data has uniform properties and excellent application function.

Summarizing the above skill plan, compared with the existing skills, the advantages of the invention are: the invention discloses and supplies a flame retardant PC / ABS composite material, which not only has excellent physical and mechanical functions, but also has excellent flame retardant functions. The invention discloses a preparation method of flame retardant PC / ABS composite material, the overall preparation process is simple, the preparation process is safe, and has no chemical toxicity.

Detailed implementation measures

The following is a clear and complete description of the skill plan in the implementation examples of the invention. Obviously, the described implementation examples are only part of the implementation examples of the invention, not all of them. According to the implementation examples in the invention, all other implementation examples obtained by the general skilled personnel in the field without making inventive labor belong to the maintenance plan of the invention.

Example 1

Oxidation treatment of wood flour:

The wood flour was baked at 260-300 ℃ for 10-15 minutes, then soaked in saturated sodium silicate solution with a solid-liquid ratio of 1.5-2:0.8-1.5 for 30-40 hours, and then dried in nitrogen to get the oxidized wood flour.

Example 2

Preparation of flame retardant polyether

The flame retardant polyether was prepared by mixing inorganic fluoride, polyether, catalyst and polytetrafluoroethylene with mass ratio of 1-2:0.5-0.8:1.4-2.3:1.5-3 in a closed reverberator under non oxygen condition, temperature of 500-700 ℃, pressure of 70-90mpa and voltage of 15-23000 V for 1-3 hours.

Example 3

Preparation of flame retardant PC / ABS composite materials:

It includes the following processes in detail:

(1) Weigh 60kg PC / ABS, 30kg wood flour, 15kg hydroxide, 10kg expandable graphite, 10kg flame retardant polyether, 2kg plasticizer, 5kg toughener and 3kg additives for standby;

(2) In the process (1), wood powder, hydroxide, expandable graphite and flame retardant polyether are mixed in high-speed mixer successively, and the temperature is controlled at 60 ℃ for 5 min to obtain a uniform mixture;

(3) PC / ABS, plasticizer, toughening agent and additives weighed in process (1) were successively added into the uniform mixture prepared in process (2) for continuous high-speed mixing, and the temperature was controlled at 100 ℃ for 15 min;

(4) The products in the process (3) are taken part in the shaping die of the conical twin-screw extruder and extruded to form the sheet.

Example 4

Preparation of flame retardant PC / ABS composite materials:

It includes the following processes in detail:

(1) Weigh 70kg PC / ABS, 35kg wood flour, 23kg hydroxide, 13kg expandable graphite, 15kg flame retardant polyether, 3kg plasticizer, 6kg toughener and 5kg additives for standby;

(2) In the process (1), the wood powder, hydroxide, expandable graphite and flame retardant polyether are mixed in the high-speed mixer successively, and the temperature is controlled at 70 ℃ for 4 min to obtain a uniform mixture;

(3) PC / ABS, plasticizer, toughening agent and additives weighed in process (1) were successively added into the uniform mixture prepared in process (2) for continuous high-speed mixing, and the temperature was controlled at 120 ℃ for 12 min;

(4) The products in the process (3) are taken part in the shaping die of the conical twin-screw extruder and extruded to form the sheet.

Example 5

Preparation of flame retardant PC / ABS composite materials:

It includes the following processes in detail:

(1) Weigh 80kg PC / ABS, 40kg wood flour, 30kg hydroxide, 15kg expandable graphite, 20kg flame retardant polyether, 5kg plasticizer, 7kg toughener and 6kg additives for standby;

(2) In the process (1), wood powder, hydroxide, expandable graphite and flame retardant polyether are mixed in high-speed mixer successively, and the temperature is controlled at 80 ℃ for 3 min to obtain a uniform mixture;

(3) PC / ABS, plasticizer, toughening agent and additives weighed in process (1) were successively added into the uniform mixture prepared in process (2) for continuous high-speed mixing, and the temperature was controlled at 140 ℃ for 10 min;

(4) The products in the process (3) are taken part in the shaping die of the conical twin-screw extruder and extruded to form the sheet.

Example 6

The function of the flame retardant PC / ABS composite material prepared in the above examples 3-5 is tested as follows:

The samples of the same size and size of the products prepared in practice examples 3-5 are selected for the single combustion test of building materials and ornaments.

The results are shown in Table 1

The above test results show that the PC / ABS composite material plate prepared by the technical plan provided in the invention has a fire resistance and flame retardant grade of a, and is non combustible. It summarizes the original physical and chemical characteristics of PC / ABS composite material, so that it has high production and use value.

To share 1

The board made of general PC / ABS composite material has passed the test, and its flame retardant function can only reach the B1 level, which is self extinguishing.

Each implementation example in this specification is described in a progressive way. The key point of each implementation example is to clarify the differences with other implementation examples. The same and similar parts of each implementation example can be referred to each other. As far as the equipment to be punctured in the implementation example is concerned, because it corresponds to the method to be punctured in the implementation example, the description is relatively brief. For the relevant points, please refer to the explanation in the method section.

The above elucidation of the disclosed embodiment enables those skilled in the art to end or use the invention. Various modifications to these embodiments will be clear to those skilled in the art. The general principles defined herein can be concluded in other embodiments without departing from the energy or planning of the invention. Therefore, the present invention will not be bound by the embodiments shown herein, but will conform to the widest planning consistent with the principles and novel features disclosed herein.