KR101594845B1 - Deflector water film composition - Google Patents

Abstract

The present invention relates to a deflector water-film resin composition, and more particularly, to a deflector water-film resin composition comprising linear low density polyethylene (LLDPE), low density polyethylene (LDPE) and polystyrene- polystyrene, SIS), a non-halogen flame retardant, an inorganic flame retardant, a blowing agent, a crosslinking agent, a metal oxide and a processing oil. The deflector water film made of the resin composition of the present invention is excellent in flame retardancy, sound absorption and sound insulation characteristics.
The deflector water film resin composition according to the present invention comprises 30 to 60% by weight of linear low density polyethylene (LLDPE), 10 to 40% by weight of low density polyethylene (LDPE), a styrene-isoprene-styrene copolymer 15 to 40% by weight of polystyrene-polyisoprene-polystyrene (SIS), 5 to 30% by weight of a mixed flame retardant, 0.1 to 3.0% by weight of a blowing agent, 0.1 to 1.0% by weight of a crosslinking agent, and 0.5 to 2.0% by weight of a metal oxide.

Description

DEFECTOR WATER FILM RESIN COMPOSITION

The present invention relates to a deflector water-film resin composition, and more particularly, to a deflector water-film resin composition comprising a linear low density polyethylene (LLDPE), a low density polyethylene (LDPE), and a polystyrene-polyisoprene- polystyrene, SIS), a non-halogen flame retardant, an inorganic flame retardant, a blowing agent, a crosslinking agent, a metal oxide and a processing oil. The deflector water film made of the resin composition of the present invention is excellent in flame retardancy, sound absorption and sound insulation characteristics.

The deflector is attached to the inside of the door panel of the vehicle to prevent foreign substances such as water, dust, and noise from penetrating into the interior of the vehicle. Transportation machine manufacturers in the world are currently applying the door trim. Depending on the current manufacturing process, it can be divided into adhesive type and butyl tape type.

However, the film for manufacturing the conventional automobile water deflector is formed of a thin film, and has a weak nature to flame and heat such as fire inside the vehicle, and shows a sound absorption function for absorbing sound and a sound insulation function for shielding sound In fact.

Korean Registered Utility Model No. 20-0162981 Automotive Water Deflector

It is an object of the present invention to provide a resin composition having improved flame retardancy inside a film by imparting flame retardancy, aspiration, and sound insulation characteristics to an automobile deflector water film of a conventional linear polyethylene. .

It is also an object of the present invention to provide a vehicle deflector water film which can effectively absorb and block external noise from inside the automobile by using the resin composition.

The deflector water film resin composition according to the present invention comprises 30 to 60% by weight of linear low density polyethylene (LLDPE), 10 to 40% by weight of low density polyethylene (LDPE), a styrene-isoprene-styrene copolymer 15 to 40% by weight of polystyrene-polyisoprene-polystyrene (SIS), 5 to 30% by weight of a mixed flame retardant, 0.1 to 3.0% by weight of a blowing agent, 0.1 to 1.0% by weight of a crosslinking agent, and 0.5 to 2.0% by weight of a metal oxide.

The deflector water film resin composition of the present invention can prevent the noise from the outside of the automobile by imparting flame retardancy, sound absorption and sound insulation characteristics to the deflector water film and can prevent the deflector water film from burning easily .

The deflector water film resin composition according to the present invention comprises 30 to 60% by weight of linear low density polyethylene (LLDPE), 10 to 40% by weight of low density polyethylene (LDPE), a styrene-isoprene-styrene copolymer 15 to 40% by weight of polystyrene-polyisoprene-polystyrene (SIS), 5 to 30% by weight of a mixed flame retardant, 0.1 to 3.0% by weight of a blowing agent, 0.1 to 1.0% by weight of a crosslinking agent, and 0.5 to 2.0% by weight of a metal oxide.

The linear low density polyethylene (LLDPE) used in the resin composition of the present invention is a predominantly linear polyethylene having a considerable number of short branches. It is mainly produced by copolymerizing ethylene and short chain? -Olefin through a metal complex catalyst do.

Depending on the alpha -olefin and its content used in the linear low density polyethylene (LLDPE), the density of LLDPE can be adjusted between the density of high density polyethylene (HDPE) and the very low density of 0.865 g / cm3.

The linear low density polyethylene (LLDPE) of the present invention is produced by copolymerizing ethylene and an? -Olefin having 4 or more carbon atoms and has a melt index (MI) of 2.0 to 9.0 g / 10 min, a density of 0.88 to 0.92 g / Of 48 to 68 is preferable.

If the melt index (MI) of the linear low-density polyethylene (LLDPE) is less than 2.0 g / 10 min, it may be difficult to produce the product or uniform shrinkage may not be obtained, and if the melt index (MI) .

If the density of the linear low density polyethylenes (LLDPE) is less than 0.88 g / cm 3, there is a problem in processing due to excessive expansion and contraction. When the density is more than 0.92 g / cm 3,

The low density polyethylene (LDPE) preferably has a density of 0.91 to 0.93 g / cm < ³ >.

If the density of the low density polyethylene (LDPE) is less than 0.91 g / cm 3, problems occur in processing due to excessive expansion and contraction. When the density of the low density polyethylene (LDPE) is more than 0.93 g / cm 3,

The polystyrene-polyisoprene-polystyrene (SIS) used in the resin composition of the present invention preferably has a density of 0.90 to 0.94 g / cm 3.

The flame retardant used in the resin composition of the present invention is a mixed flame retardant obtained by mixing a non-halogen flame retardant and an inorganic flame retardant.

The content of the mixed flame retardant in the resin composition is 5 to 30% by weight. When the mixed flame retardant is less than 5%, the flame retardancy of the film is not sufficient. When the content is more than 30% by weight, And it is difficult to prepare it as a deflector film. Therefore, it is limited to 5 to 30% by weight.

The non-halogen flame retardant includes phosphorus, melamine and the like, and the phosphorus flame retardant reacts with a combustible material in a combustion process to form a carbonized film on the surface of the polymer, and the carbonized film blocks oxygen required for combustion to produce a flame retardant effect. In particular, the phosphorus-based flame retardant reacts with the oxygen element in the polymer to dehydrate and carbonize it, thereby exhibiting a flame retarding effect, and therefore, the phosphorus-based flame retardant effectively performs a flame retarding effect in the polymer containing oxygen element. The melamine flame retardant is a melamine-based flame retardant, which melts when melted and melamine and phosphoric acid are condensed, respectively. Flame retardancy is mainly due to endothermic reaction and condensation mechanism.

Examples of the non-halogen flame retardant used in the present invention include melamine cyanurate (MCA), melamine polyphosphate (MPP), ammonium polyphosphate (APP), triphenyl phosphate, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) is preferably selected from 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide.

The inorganic flame retardant is a mechanism that suppresses combustion by endothermic reaction by dehydration reaction. When it is used together with a non-halogen flame retardant, the characteristics are improved by the flame retardant synergistic effect, and the physical properties and molding processability .

The inorganic flame retardant used in the present invention is preferably selected from among aluminum hydroxide, antimony oxide, magnesium hydroxide, zinc stannate and molybdate.

The mixing ratio of the mixed flame retardant is 0.5 to 1.2 parts by weight of an inorganic flame retardant mixed with 1 part by weight of the non-halogen flame retardant. If the inorganic flame retardant is mixed at less than 0.5 part by weight, the synergistic effect of the flame retardant property is insignificant. When the inorganic flame retardant is more than 1.2 parts by weight, workability and physical properties are deteriorated.

The foaming agent used in the resin composition of the present invention may be an azo compound or a nitro compound which may be used in combination with an azo compound such as 2,2'-azoisobutyronitrile, azorexanhydronbzonitrile, azodicarbonamide, diazoaminobenzene, N, N, N-dinitroso-N, N ' -dimetal terephthalamide.

If the content of the blowing agent in the resin composition is 0.1 to 3.0% by weight, the hardness and specific gravity of the resin composition may be increased. If the content of the foaming agent is more than 3.0% by weight, a stable foam can not be obtained due to excessive foaming, Lt; / RTI >

The cross-linking agent used in the resin composition of the present invention is preferably at least one selected from the group consisting of t-butyl peroxyneodecanoate, t-butyl peroxypivalate, t-butyl peroxy-2-ethylhexanoate, Peroxy) cyclohexane, t-butyl cumyl peroxide, and t-butyl peroxybenzoate.

When the content of the crosslinking agent in the resin composition is less than 0.1% by weight, heat resistance may not be exhibited. When the content of the crosslinking agent is more than 1.0% by weight, the cell structure is dense due to excessive crosslinking, A problem arises.

The metal oxide used in the resin composition of the present invention is selected from among magnesium oxide, calcium oxide, zinc oxide, cadmium oxide, silver oxide, and lead oxide and is used for foam processing and for improving the physical properties or flame retardancy of the foam.

The content of the metal oxide in the resin composition is 0.5 to 2.0% by weight. If it is less than 0.5% by weight, the effect of improving the flame retardancy or improving the physical properties of the foam is difficult to be exhibited.

The resin composition of the present invention may further contain additives such as processing oil, foaming auxiliary, decomposition auxiliary agent and the like within the scope of the object of the present invention. In the case of processing oil, it may additionally be included for controlling the hardness, and the preferred content of the processing oil is 0.2 to 1.0 wt%.

The present invention can be more specifically understood by the following examples, and the following examples are intended to illustrate the present invention.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 LLDPE 40 45 35 55 30 30 LDPE 20 20 15 10 30 10 SIS 20 15 10 25 20 40 Flame retardant 17 17 37 7 13 17 blowing agent One One One One 5 One Cross-linking agent 0.5 0.5 0.5 0.5 0.5 0.5 Metal oxide 1.0 1.0 1.0 1.0 1.0 1.0 Processing oil 0.5 0.5 0.5 0.5 0.5 0.5

[Example 1]

In Example 1, as shown in Table 1, 40 wt% of linear low density polyethylene (LLDPE), 20 wt% of low density polyethylene (LDPE), 20 wt% of polystyrene-polyisoprene-polystyrene (SIS) , 17 wt% of a mixed flame retardant (melamine cyanuric acid salt and aluminum hydroxide mixed flame retardant), 1 wt% of a foaming agent (2,2'-azoisobutyronitrile), 0.5 wt% of a crosslinking agent (t-butylperoxyneodecanoate) 1.0% by weight of a metal oxide (magnesium oxide), and 0.5% by weight of a processing oil.

[Example 2]

Example 2 was prepared in the same manner as in Example 1 except that 45 wt% of linear low density polyethylene (LLDPE), 20 wt% of low density polyethylene (LDPE), 15 wt% of polystyrene-polyisoprene-polystyrene (SIS) , 17 wt% of a mixed flame retardant (melamine cyanuric acid salt and aluminum hydroxide mixed flame retardant), 1 wt% of a foaming agent (2,2'-azoisobutyronitrile), 0.5 wt% of a crosslinking agent (t-butylperoxyneodecanoate) 1.0% by weight of a metal oxide (magnesium oxide), and 0.5% by weight of a processing oil.

[Example 3]

Example 3 was prepared in the same manner as in Example 1 except that 35 weight% of linear low density polyethylene (LLDPE), 15 weight% of low density polyethylene (LDPE), 10 weight% of polystyrene-polyisoprene-polystyrene (SIS) , 37 wt% of a mixed flame retardant (melamine cyanuric acid salt and aluminum hydroxide mixed flame retardant), 1 wt% of a foaming agent (2,2'-azoisobutyronitrile), 0.5 wt% of a crosslinking agent (t-butylperoxyneodecanoate) 1.0% by weight of a metal oxide (magnesium oxide), and 0.5% by weight of a processing oil.

[Example 4]

Example 4 was prepared in the same manner as in Example 1 except that 55 wt% of linear low density polyethylene (LLDPE), 10 wt% of low density polyethylene (LDPE), 25 wt% of polystyrene-polyisoprene-polystyrene (SIS) , 7 wt% of a mixed flame retardant (melamine cyanuric acid salt and aluminum hydroxide mixed flame retardant), 1 wt% of a foaming agent (2,2'-azoisobutyronitrile), 0.5 wt% of a crosslinking agent (t-butylperoxyneodecanoate) 1.0% by weight of a metal oxide (magnesium oxide), and 0.5% by weight of a processing oil.

[Example 5]

Example 5 was prepared in the same manner as in Example 1 except that 30 wt% of linear low density polyethylene (LLDPE), 30 wt% of low density polyethylene (LDPE), 20 wt% of polystyrene-polyisoprene-polystyrene (SIS) 13 wt% of a mixed flame retardant (melamine cyanuric acid salt and aluminum hydroxide mixed flame retardant), 5 wt% of a foaming agent (2,2'-azoisobutyronitrile), 0.5 wt% of a crosslinking agent (t-butylperoxyneodecanoate) 1.0% by weight of a metal oxide (magnesium oxide), and 0.5% by weight of a processing oil.

[Example 6]

Example 6 was prepared in the same manner as in Example 1 except that 30 wt% of linear low density polyethylene (LLDPE), 10 wt% of low density polyethylene (LDPE), 40 wt% of polystyrene-polyisoprene-polystyrene (SIS) , 17 wt% of a mixed flame retardant (melamine cyanuric acid salt and aluminum hydroxide mixed flame retardant), 1 wt% of a foaming agent (2,2'-azoisobutyronitrile), 0.5 wt% of a crosslinking agent (t-butylperoxyneodecanoate) 1.0% by weight of a metal oxide (magnesium oxide), and 0.5% by weight of a processing oil.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6


Furtherance

And

Properties LLDPE 40 45 35 55 30 30 LDPE 20 20 15 10 30 10 SIS 20 15 10 25 20 40 Flame retardant 17 17 37 6 10 17 blowing agent One One One One 5 One Cross-linking agent 0.5 0.5 0.5 0.5 2.5 0.5 Metal oxide 1.0 1.0 1.0 2.0 1.0 1.0 Processing oil 0.5 0.5 0.5 0.5 1.5 0.5 The tensile strength 168.5 160.3 140.8 172.3 169.7 165.4 Elongation rate 176.4 170.3 180.2 167.8 161.3 170.2 Flame retardancy V-0 V-0 V-0 fail V-0 V-0

The physical property measurement items and methods shown in Table 2 are as follows.

(1) Tensile strength

It was measured according to ASTM D638

(2) Elongation rate

It was measured according to ASTM D638.

(3) Flame Retardancy

A 1/12 "thick specimen was measured in accordance with UL 94 VB standard.

(23 ± 2 ° C, 50 ± 5% RH condition)

As shown in Table 2, when the composition of the resin composition was prepared within the suggested range of the present invention, the deflector water-film resin composition of the present invention had a tensile strength of 160 to 170 kgf / cm 2, 180%, a flame resistance of 23 ± 2 ° C, and a RH of 80 to 100 mm / min.

The deflector water film of the deflector water film resin composition of the present invention is a method of measuring the air transmission and blocking performance of the sound absorbing characteristic of the deflector water film. The acoustic monitoring coefficient and the frequency characteristic of the sample are measured by the in- 12dB.

As described above, it is to be understood that the technical structure of the present invention can be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

Therefore, it should be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, All changes or modifications that come within the scope of the equivalent concept are to be construed as being included within the scope of the present invention.

Claims (9)

30 to 60% by weight of a linear low density polyethylene (LLDPE) having a melt index (MI) of 2.0 to 9.0 g / 10 min, a density of 0.88 to 0.92 g / cm 3 and a hardness of 48 to 68,
10 to 40 wt% of low density polyethylene (LDPE), 15 to 40 wt% of a polystyrene-polyisoprene-polystyrene (SIS), 5 to 30 wt% of a mixed flame retardant, 0.1 to 3.0 wt 0.1 to 1.0% by weight of a crosslinking agent, 0.5 to 2.0% by weight of a metal oxide, and 0.2 to 1.0% by weight of a processed oil,
The mixed flame retardant is prepared by mixing a non-halogen flame retardant and an inorganic flame retardant,
Non-halogen flame retardants include melamine cyanurate (MCA), melamine polyphosphate (MPP), ammonium polyphosphate (APP), triphenyl phosphate, and the like, which are phosphorous or melamine flame retardants. At least one of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO)
The inorganic flame retardant may be at least one selected from aluminum hydroxide, antimony oxide, magnesium hydroxide, zinc stannate and molybdate,
0.5 to 1.2 parts by weight of an inorganic flame retardant is mixed with 1 part by weight of a non-halogen flame retardant,
The blowing agent may be an azo compound or a nitro compound,
Azo compounds such as 2,2'-azoisobutyronitrile, azorexanthrobenzonitrile, azodicarbonamide, diazoaminobenzene, N, N 'dinitrosopentamethylenetramine, N, N'-dimetal terephthalamide,
The crosslinking agent may be at least one selected from the group consisting of t-butyl peroxyneodecanoate, t-butyl peroxypivalate, t-butylperoxy-2-ethylhexanoate, 1,1-di (t-butylperoxy) cyclohexane, t -Butylcumylperoxide, t-butylperoxybenzoate,
Wherein the metal oxide comprises at least one of magnesium oxide, calcium oxide, zinc oxide, cadmium oxide, silver oxide, and lead oxide. delete delete delete delete delete The method according to claim 1,
Wherein the deflector water film resin composition has a tensile strength of 160 to 170 kgf / cm 2 and an elongation percentage of 170 to 180%. The method according to claim 1,
Wherein the deflector water film resin composition has a flame retardancy of 23 +/- 2 DEG C and an RH of 80 to 100 mm / min. The method according to claim 1,
Wherein the deflector water film resin composition is a method for measuring the air transmission and blocking performance of a sound absorption characteristic, and the acoustic monitoring coefficient and the frequency characteristic of the sample are measured by a tube method to be 8 to 12 dB at a frequency of 1000 Hz. Composition