CN103421289A - Fire Composite - Google Patents

Abstract

The present invention provides a fireproof composite material, comprising polycarbonate, silicon-based flame retardant, polytetrafluoroethylene, and inorganic filler material, wherein the inorganic filler material is talc or mica. The composition ratio is 100 parts by weight of polycarbonate, the composition ratio is 2-3 parts by weight of siloxane compound, the composition ratio is 3-5 parts by weight of inorganic filler material, and the composition ratio is 0.4-0.6 parts by weight of polytetrafluoroethylene. When the thickness is 1.0 cm and 1.2 cm, the V0 fireproof grade can be maintained after the UL 94 vertical combustion test. The fireproof material provided by the present invention can still maintain the V0 fireproof grade under the requirement of lightweight, and the silicon-based flame retardant used can enhance the impact resistance of the fireproof composite material.

Description

Fire Composite

technical field

The present invention belongs to the composition of polymer compounds, more particularly, it relates to the fireproof composite material made of the composition of polycarbonate or the composition of polycarbonate derivatives.

Background technique

General thermoplastic materials (such as: polycarbonate) have good mechanical strength and can be used in many industries, such as: architectural decoration, vehicle interior, and electronic components or electrical appliances, and more and more products require Only when it is flame retardant can it meet the relevant fire regulations to pass the certification.

Although different industrial applications have different requirements for fire protection levels, more and more products are becoming lighter, thinner and shorter in design, and the thinner the finished product, the more difficult it is to maintain good fire resistance properties. However, in light weight Under the requirements of the requirements, the current requirements for the fire rating of plastic materials are increasing day by day.

At present, in the prior art, such as U.S. publication patent specifications US6001921, US6117542, US6184312, US6284824, US6326425, US6451906, US6509421, US7462662, and U.S. published patent specifications US20010018487, US20010044484, US20060252890, etc. Composite materials mostly use halogen (such as bromide), phosphorus (Phosphor), melamine (Melamin) or aluminum hydroxide (Aluminum Trihydrate, ATH) and other components as flame retardants.

Among them, the halogen-based and phosphorus-based fireproof materials with bromide added as flame retardants cannot meet the requirements of TCO'99 certification during the production process. The heat deflection temperature of the material is lowered and causes mold contamination. However, fireproof materials using melamine or aluminum hydroxide as flame retardants have problems such as high processing temperature and poor impact resistance.

Contents of the invention

In order to solve the above problems, the present invention provides a fireproof composite material comprising polycarbonate, silicon-based flame retardant, inorganic filler and polytetrafluoroethylene. Among them, the proportion of polycarbonate is 100 parts by weight, the proportion of silicon-based flame retardant is 2-3 parts by weight, the proportion of inorganic filler material is 3-5 parts by weight, and the proportion of polytetrafluoroethylene is 0.4-0.6 parts by weight share. The inorganic filler material is talc or mica. Thus, the fireproof composite material provided by the present invention meets the V0 fireproof level after passing the UL 94 vertical burning test.

Therefore, the main purpose of the present invention is to provide a fireproof composite material with UL 94V0 fireproof rating, and due to the use of silicon-based flame retardant, thereby strengthening the impact resistance of the fireproof composite material.

Another object of the present invention is to provide a fireproof composite material, which is composed of a silicon-based flame retardant, talc or mica as an inorganic filler, and polytetrafluoroethylene as an anti-dripping agent. Under quantitative requirements, the aforementioned composition can still maintain the UL 94V0 fire rating.

In addition, the present invention also provides another fireproof composite material, which comprises polycarbonate with a composition ratio of 100 parts by weight, a silicon-based flame retardant with a composition ratio of 2 to 3 parts by weight, and an inorganic fire retardant with a composition ratio of 3 to 5 parts by weight. The filling material and polytetrafluoroethylene with a composition ratio of 0.4-0.6 parts by weight. The inorganic filler is talc or mica. Therefore, when the thickness of the fireproof composite material is 1.0 cm, it meets the V0 level after the UL 94 vertical burning test. When the thickness of the fireproof composite material is 1.2 cm, it meets the V0 level after the UL 94 vertical burning test.

Therefore, the main purpose of the present invention is to provide a fireproof composite material with UL 94V0 rating, and because of the use of silicon-based flame retardant, thereby enhancing the impact resistance of the fireproof composite material.

Another object of the present invention is to provide a fireproof composite material, which is composed of a silicon-based flame retardant, talc or mica as an inorganic filler, and polytetrafluoroethylene as an anti-dripping agent. Under the increased requirements, the aforementioned composition can still maintain the UL 94V0 fire rating.

Detailed ways

Since the present invention discloses a fireproof composite material, the chemical principles used therein and related processes of organic and inorganic materials are well understood by those skilled in the art, so the following description will not be fully described.

The first preferred embodiment of the present invention provides a kind of fireproof composite material, comprises polycarbonate (thermoplastic resin), siloxane compound (flame retardant), talc or mica (inorganic filler material), and polytetrafluoroethylene ( anti-dripping agent). Among them, the proportion of polycarbonate is 100 parts by weight, the proportion of silicone compound is 2-3 parts by weight, the proportion of talc or mica is 1-5 parts by weight and the proportion of polytetrafluoroethylene is 0.4 parts by weight.

General fire-resistant composite materials are judged by the UL 94 vertical burning test. The test standard is the longest self-extinguishing time after vertical burning, the total burning time, whether it can be dripped, and the ignitability of cotton after dripping is divided into V0, There are three grades of V1 and V2, among which, V0 grade is the best fireproof material, followed by V1 and V2. And the fireproof composite material of the preferred first embodiment meets the V0 level after the UL 94 vertical burning test.

The present invention also provides a second preferred embodiment, which is also a fireproof composite material, wherein the components of the material and the preferred ranges of the components are substantially the same as those described in the first preferred embodiment. When the thickness of the test piece of the fireproof composite material provided by the second preferred embodiment is 1.0mm, it meets the UL 94V0 grade after the vertical burning test.

The following experimental examples are further provided below to illustrate the characteristics of the fireproof composite material provided by the present invention.

Experimental example:

A. Materials and methods:

I. Preparation of composite fireproof material:

100 parts by weight of polycarbonate (Polycarbonate) with melt index (Melting Index) (melt index is the value of fluidity during plastic material processing) of 10 and 62, 2 to 3 parts by weight of siloxane compound (Siloxane compound), talc ( 3-5 parts by weight of Talc, 0.4 parts by weight of Polytetrafluoroethylene, and 0.1 part by weight of antioxidant (Antioxidant), were made into a composite fireproof material, which was used as an experimental group for UL 94 vertical burning test. 15 parts by weight of titanium dioxide (TiO ₂ ) was further added to the sample number 3. And the sample number 1, 2 adopts the polycarbonate 60 weight parts that melt index is 10 and the polycarbonate 40 weight parts that melt index is 62, and the sample number 3 adopts the polycarbonate that melt index is 10 50 weight parts and 50 parts by weight of polycarbonate with a melt index of 62. The material composition of each sample in the experimental group is shown in Table 1:

In addition, 100 parts by weight of polycarbonate, 3 parts by weight of siloxane compounds, 0.4 parts by weight of polytetrafluoroethylene, and 0.1 parts by weight of antioxidant are made into a composite fireproof material with a thickness of 1.5 cm (number 4 sample) as the first control group in the UL 94 vertical burning test. And the first control group used 50 parts by weight of polycarbonate with a melt index of 10 and 50 parts by weight of polycarbonate with a melt index of 62, a total of 100 parts by weight of polycarbonate.

100 parts by weight of polycarbonate, 0.01 parts by weight of potassium perfluorobutane sulfonate (Potassiumperfluorobutane sulfonate), 1 part by weight of talc, 0.4 parts by weight of polytetrafluoroethylene, and 0.1 parts by weight of antioxidant, made Composite fireproof material (No. 5 sample) as the second control group of UL 94 vertical burning test. In the second control group, potassium perfluorobutane sulfonate was used as the flame retardant. And the polycarbonate of the second control group was 60 parts by weight of polycarbonate with a melt index of 10 and 40 parts by weight of polycarbonate with a melt index of 62, making a total of 100 parts by weight of polycarbonate.

100 parts by weight of polycarbonate, 2 parts by weight of siloxane compound, 1 part by weight of talc, 0.4 part by weight of polytetrafluoroethylene, and 0.1 part by weight of antioxidant are made into a composite fireproof material (No. 6 sample) to make It is the third control group of UL 94 vertical burning test. And the polycarbonate of the third control group was 60 parts by weight of polycarbonate with a melt index of 10 and 40 parts by weight of polycarbonate with a melt index of 62, making a total of 100 parts by weight of polycarbonate. The composition of each sample material in each aforementioned control group is as shown in Table 2:

^* : the first control group; ^** : the second control group; ^$ : the third control group

The composite fireproof material prepared according to the composition ratio of each group mentioned above is cut into length, width and thickness of 120 cm, 13 cm, 1.0 cm or 1.2 cm or 1.5 cm (120mm x 13mm x 1.0mm or 1.2mm or 1.5mm) Composite fireproof material test pieces are subjected to UL 94 vertical burning test and notched impact strength test in the following manner.

II. UL 94 vertical burning test:

Prepare five composite fireproof material test pieces with the same composition, length, width and thickness, and conduct the combustion test according to the UL 94 vertical combustion test standard. Firstly, each composite fireproof material test piece was clamped on the sample rack, and surgical cotton was placed 300 cm below the test piece. Place the ignited Bunsen burner under the test piece, ignite it for the first time, remove it after 10 seconds, measure the time required for the test piece to self-extinguish after the flame is removed, and record it as the first self-extinguishing time. After removing it for 10 seconds, move the lighted Bunsen burner under the test piece again, carry out the second ignition, remove it after 10 seconds, and measure the time required for the self-extinguishing of the test piece after the flame is removed, and record as The second self-extinguishing time. And according to the longest self-extinguishing time of each test piece, the total burning time, whether the test piece drips during burning, whether the test piece burns to the fixture, if the test piece burns with dripping, whether it ignites the cotton, and the middle of the burning period of the test piece Whether the smoke blocks the Bunsen burner and other results, determine whether each sample has passed the UL 94 vertical burning test, and its fire rating. The total burning time refers to the sum of the first burning time and the second burning time measured after the burning test of five test pieces of a single sample. The passing specifications of each level (V0, V1, V2) are shown in Table 3.

In addition, the longest self-extinguishing time shown in Table 3, whether it can drip, and whether the drip can ignite the cotton standard, each sample needs five test pieces that meet the grade specifications to be considered as a pass. However, in fire ratings V0, V1, and V2, none of the five test pieces should be allowed to spread to the fixture.

III. Notched Izod testing:

According to the ASTM D256 test method published by the American Society for Testing and Materials, the fireproof materials composed of different materials in the above-mentioned experimental group or control group were prepared, and the size of length x width x thickness was 2.5x 0.5x 0.125 Test the impact strength of Yingshi's test piece, and record the total energy (kg-cm/cm) that the test piece bears when it breaks.

B. Fire rating test results:

I. The fire-resistant composite materials of the experimental group have passed the UL 94 combustion test and the best fire-proof rating meets V0:

According to the fireproof composite material (experimental group) provided by the present invention, after the UL 94 vertical burning test, the measured fireproof rating is V0. The test results of the samples of each number are shown in Table 4 below:

^* : T ₁ and T ₂ represent the first self-extinguishing time and the second self-extinguishing time of each test piece respectively

It can be seen from the above table that the sample thickness of the experimental group No. 1 is 1.2 cm, the longest self-extinguishing time is less than 10 seconds, and the longest self-extinguishing time appears in the second self-extinguishing time of test piece 5, which is 7.1 seconds. The total burn time is 31.9 seconds, which is less than 50 seconds. The burning conditions of the samples did not drip, nor did they spread to the fixture, and the smoke did not block the Bunsen burner during the burning period. Therefore, its fire rating is judged as V0.

The sample thickness of experimental group No. 2 was 1.0 cm, and the longest self-extinguishing time was less than 10 seconds. The longest self-extinguishing time appeared in the second self-extinguishing time of test piece 3, which was 6.3 seconds. The total burn time is 18.3 seconds, which is less than 50 seconds. The combustion status of the samples did not drip, nor did they spread to the fixture, and the smoke did not block the Bunsen burner during combustion. Therefore, its fire rating is judged as V0.

The sample thickness of experimental group No. 3 was 1.5 cm, and the longest self-extinguishing time was less than 10 seconds. The longest self-extinguishing time appeared in the second self-extinguishing time of test piece 1, which was 6.1 seconds. The total burn time is 23.1 seconds, which is less than 50 seconds. The combustion status of the samples did not drip, nor did they spread to the fixture, and the smoke did not block the Bunsen burner during combustion. Therefore, its fire rating is judged as V0.

Therefore, according to the above-mentioned results, the thickness provided by the experimental group of the present invention is 1.0 centimeters, 1.2 centimeters of composite fireproof samples, through adjusting the weight part of siloxane compound (flame retardant) and talc (inorganic silicate layered material) ) parts by weight. After the adjustment, the UL 94 combustion test proved that the samples No. 1 and No. 2 can meet the V0 fire protection level.

In addition, the thickness provided by the experimental group of the present invention is a composite fireproof sample of 1.5 centimeters, by adjusting the weight part of siloxane compound (flame retardant) and the weight part of talc (inorganic silicate layered material), and further Add titanium dioxide. After adjustment, the UL 94 combustion test proved that the sample No. 3 meets the V0 fire protection level.

II. Without adding inorganic filler materials, it will affect the fire rating:

The sample number 4 of the first control group was found to have a fire rating of V2 at a thickness of 1.5 cm by the UL 94 vertical burning test. The test results are shown in Table 5 below:

^* : T ₁ and T ₂ represent the first self-extinguishing time and the second self-extinguishing time of each test piece respectively

It can be known from the above table that the sample thickness of the first control group No. 4 is 1.5 cm. The longest self-extinguishing time is less than 10 seconds, and the total burning time is less than 50 seconds. Among them, the burning conditions of test pieces 2, 3, and 4 at the first self-extinguishing time did not drip, nor did they spread to the fixture, and the smoke did not extinguish the Bunsen burner during the burning period. In the combustion conditions of test pieces 1 and 5 at the first self-extinguishing time and test pieces 1, 2, 3, 4 and 5 at the second self-extinguishing time, dripping occurred and the cotton was ignited. Therefore, its fire rating is judged as V2.

According to the above results, the sample No. 4 of the first control group did not use inorganic filler materials, and even when the thickness of the sample was 1.5 cm, it only reached the V2 fire protection level.

III. Potassium perfluorobutane sulfonate is used as a flame retardant, and its fire rating is V1 fire rating:

The sample of the second control group No. 5 was found by the UL 94 vertical burning test that its fire rating was V1 at a thickness of 1.2 cm. The test results are shown in Table 6 below:

^* : T ₁ and T ₂ represent the first self-extinguishing time and the second self-extinguishing time of each test piece respectively

It can be seen from the above table that the longest self-extinguishing time of the sample No. 5 of the second control group was more than 10 seconds and shorter than 30 seconds when the thickness was 1.2 cm, and the longest self-extinguishing time appeared in the second self-extinguishing time of test piece 3. The off time is 19 seconds. The total burn time is over 50 seconds. There is no dripping and burning to the fixture during burning, so the fire rating meets the V1 standard.

According to the above results, the sample No. 5 of the second control group uses potassium perfluorobutane sulfonate as the flame retardant. Although the second control group uses talc as the inorganic filler material like the experimental group, it only reaches the V1 fire protection level.

IV. Potassium perfluorobutane sulfonate is used as a flame retardant, and its fire rating is V1 fire rating:

The sample of No. 6 of the third control group was found by the UL 94 vertical burning test, and its fire rating was V1 when the thickness was 1.2 cm. The test results are shown in Table 7 below:

^* : T ₁ and T ₂ represent the first self-extinguishing time and the second self-extinguishing time of each test piece respectively

It can be known from the above table that the thickness of the sample No. 6 of the third control group is 1.2 cm, and the longest self-extinguishing time is more than 10 seconds and shorter than 30 seconds, and the longest self-extinguishing time appears in the second self-extinguishing time of test piece 3 for 22.1 seconds. The total burn time was 70.2 seconds, which is short of 250 seconds. The combustion status of the samples did not drip, nor did they spread to the fixture, and the smoke did not block the Bunsen burner during combustion. Therefore, its fire rating is judged as V1. .

According to the above results, the sample No. 6 of the third control group uses talc as the inorganic filler material, and the third control group only reaches the V1 fire protection level when the proportion of talc is reduced.

C. Impact strength test results:

According to the fireproof composite material provided by the present invention (experimental group numbering 1, 3 and the second control group numbering 5), after the impact resistance test, the sample test results of each numbering are as shown in Table 8 below:

It can be seen from the above table that the impact strengths of samples numbered 1 and 3 in the experimental group (using silicon-based flame retardants) were 64.3 and 43.65 respectively; As a flame retardant) the impact strength of the sample is 10.3. From the experimental results, it can be known that the impact strength of the experimental group Nos. 1 and 3 is better than that of the second control group No. 5.

That is to say, according to the comparison results of the samples numbered 1, 3, and 5, the fireproof composite material provided by the present invention has a higher impact strength.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the application for patent rights of the present invention; at the same time, the above descriptions should be clear and implementable for those of ordinary skill in the art, so other disclosures that do not depart from the disclosure of the present invention Equivalent changes or modifications made under the spirit should be included in the claims.

Claims (4)

1. a Flameproof composite material comprises:

One polycarbonate, its composition ratio is 100 weight parts;

One silica-based fire retardant, comprise a silicone compounds, and its composition ratio is 2～3 weight parts;

One inorganic filling material, its composition ratio is 3～5 weight parts, this inorganic filling material is selected from the group consisted of talcum and mica; And

One tetrafluoroethylene, its composition ratio is 0.4～0.6 weight part.

2. Flameproof composite material according to claim 1 conforms with UL 94V0 grade after a testing vertical flammability.

3. a Flameproof composite material comprises:

One polycarbonate, its composition ratio is 100 weight parts;

One silica-based fire retardant, include a silicone compounds, and its composition ratio is 2～3 weight parts;

One inorganic filling material, its composition ratio is 3～5 weight parts, this inorganic filling material is selected from the group consisted of talcum and mica; And

One tetrafluoroethylene, its composition ratio is 0.4～0.6 weight part, by this, when the thickness of test piece of this Flameproof composite material is 1.0mm, conforms with UL 94V0 grade after a testing vertical flammability.

4. a Flameproof composite material comprises:

One polycarbonate, its composition ratio is 100 weight parts;

One silica-based fire retardant, include a silicone compounds, and its composition ratio is 2～3 weight parts;

One inorganic filling material, its composition ratio is 3～5 weight parts, this inorganic filling material is selected from the group consisted of talcum and mica; And

One tetrafluoroethylene, its composition ratio is 0.4～0.6 weight part, by this, when the thickness of test piece of this Flameproof composite material is 1.2mm, conforms with UL 94V0 grade after this testing vertical flammability.