CN103087381A - MBS (methyl methacrylate-butadiene-styrene)-coated nano kaolin modified low-density polyethylene (LDPE) foamed material and preparation method thereof - Google Patents

Abstract

The invention discloses a MBS (methyl methacrylate-butadiene-styrene)-coated nano kaolin modified low-density polyethylene (LDPE) foamed material which is prepared from the following raw materials in parts by weight: 60-100 parts of LDPE, 0-40 parts of LLDPE (linear low-density polyethylene), 30-40 parts of MBS, 10-20 parts of nano kaolin, 2-3 parts of isopropyldistearoyloxyaluminate, 5-10 parts of magnesium hydroxide, 4-6 parts of azobisformamide, 2-3 parts of sodium citrate, 5-8 parts of dioctyl phthalate, 1-1.5 parts of benzoperoxide, 2-4 parts of calcium oxide, 1-2 parts of stearic acid, 1-2 parts of lead stearate. 2-3 parts of ethylene bis stearamide, 3-5 parts of modified plant ash, 1-2 parts of ultraviolet absorbent UV-9 and 2-3 parts of antioxidant 1035. The MBS-coated nano kaolin modified LDPE foamed material disclosed by the invention has the advantages of light weight, softness, high strength, favorable resilience, ideal foaming effect, uniform, fine and compact pores, favorable flame retardancy, resistance to chemical attack, aging resistance and high durability.

Description

A kind of MBS clad nano Modification of kaolin Low Density Polyethylene foam material and preparation method thereof

Technical field

The invention belongs to field of high polymer material processing, be specifically related to a kind of MBS clad nano Modification of kaolin Low Density Polyethylene foam material and preparation method thereof.

Background technology

The Low Density Polyethylene foam material has excellent physics, chemistry and mechanical property.It is tough, and flexibility is good, and abrasion performance has excellent electrical insulating property, and thermal insulation and chemical resistant properties are widely used in many fields such as packing, chemical industry, building.But the Low Density Polyethylene foam material also exists the shortcomings such as intensity is low, rebound resilience is poor, abscess is inhomogeneous at present, so it is soft that one of developing direction of Low Density Polyethylene foam material is exploitation, flexibility is high, intensity is high, abscess is even, the closed-cell foam grade of tiny densification, simultaneously, each field also proposes corresponding requirement to plastic material fire-retardant.

Summary of the invention

The object of the invention is to for the deficiencies in the prior art, a kind of excellent mechanical properties that has is provided, MBS clad nano Modification of kaolin Low Density Polyethylene foam material of good flame resistance and environment-protecting asepsis and preparation method thereof.

The technical scheme that the technical solution used in the present invention adopts is as follows:

A kind of MBS clad nano Modification of kaolin Low Density Polyethylene foam material is made by the raw material of following weight part: LDPE 60-100, LLDPE 0-40, MBS 30-40, nano kaoline 10-20, sec.-propyl distearyl acyl-oxygen base Aluminate 2-3, magnesium hydroxide 5-10, Cellmic C 121 4-6, Trisodium Citrate 2-3, dioctyl phthalate (DOP) 5-8, benzoyl peroxide 1-1.5, calcium oxide 2-4, stearic acid 1-2, lead stearate 1-2, ethylene bis stearic acid amide 2-3, modification trees ash 3-5, UV light absorber UV-9 1-2, oxidation inhibitor 1035 2-3.

Described modification trees ash is made by following methods: first boil trees ash 20-30min with the 10-15% sodium hydroxide solution, use again distilled water rinsing Ex-all alkali, be placed in the drying in oven of 110-120 ℃, add the Silane coupling reagent KH-570 that is equivalent to trees ash weight 2-3%, the natural rubber latex of 2-3%, the sodium lignosulfonate of 3-4%, the active aluminum of 4-6%, stir 2-3h 100-110 ℃ of water-bath high speed, oven dry, pulverizing grinds to form ultrafine powder and gets final product.

The total weight parts of described LDPE and LLDPE is 100.

The preparation method of MBS clad nano Modification of kaolin Low Density Polyethylene foam material comprises the following steps:

(1) will add in the high-speed kneading machine with sec.-propyl distearyl acyl-oxygen base Aluminate after the nano kaoline drying, speed with 500-800rpm under 110-120 ℃ mixes 20-30min, add again MBS speed melt blending 10-20min with 1000-1500rpm under 100-110 ℃, compound is moved into extruding pelletization in forcing machine, be cooled to normal temperature and namely get the nano kaoline particle that MBS coats, standby;

(2) the nano kaoline particle with LDPE, LLDPE and the above-mentioned MBS coating that makes adds in Banbury mixer together, then mixing 5-8min under 100-110 ℃ adds the remaining raw material such as magnesium hydroxide, Cellmic C 121, Trisodium Citrate to continue mixing 10-15min discharging successively;

(3) above-mentioned material after mixing is moved into rapidly in open refining broken-(down)rubber machine thin refining 2-5 time, thickness 5-8mm, temperature is controlled at 95-105 ℃, then is cut into the sheet stock of required size, weighing;

(4) appropriate sheet stock is added in the mould of preheating, be forced into 8-10MPa at ℃ temperature of 160-170 on vulcanizing press, pressurize 10-15min removes foam, is cooled to normal temperature and namely gets MBS clad nano Modification of kaolin Low Density Polyethylene foam material of the present invention.

Beneficial effect of the present invention:

The present invention is by carrying out modification to the trees ash, obviously improved the interface binding intensity of trees ash with Low Density Polyethylene, under external force, modification trees grey particle plays the effect of bearing stress and dispersive stress effectively in foam material, and bring out matrix resin generation plastic deformation, thereby the mechanical properties such as tensile strength, shock strength and modulus in flexure of foam material have been improved.The present invention utilizes MBS to coat modified Nano kaolin by to formula adjustment and process modification, can obviously improve nano kaoline and poly consistency, thereby improves physical strength and the hardness of foam material.MBS clad nano Modification of kaolin Low Density Polyethylene foam material light weight that the present invention produces is soft, intensity is high, rebound resilience good, and foaming effect is desirable, abscess is even, tiny densification, good flame resistance, and resistance to chemical attack is ageing-resistant, durable in use.

Embodiment

Embodiment

A kind of MBS clad nano Modification of kaolin Low Density Polyethylene foam material is made by the raw material of following weight part: 75 parts of LDPE, 25 parts of LLDPE, 30 parts of MBS, 15 parts of nano kaolines, 3 parts of sec.-propyl distearyl acyl-oxygen base Aluminates, 8 parts of magnesium hydroxides, 6 parts of Cellmic C 121s, 3 parts of Trisodium Citrates, 8 parts of dioctyl phthalate (DOP)s, 1.5 parts of benzoyl peroxides, 3 parts, calcium oxide, 2 parts of stearic acid, 1.5 parts of lead stearates, 2.5 parts of ethylene bis stearic acid amides, 4 parts of modification trees ashes, 2 parts of UV light absorber UV-9,1,035 2 parts, oxidation inhibitor.

Wherein, described modification trees ash is made by following methods: first boil trees ash 20min with 15% sodium hydroxide solution, use again distilled water rinsing Ex-all alkali, be placed in the drying in oven of 115 ℃, add the Silane coupling reagent KH-570 that is equivalent to trees ash weight 2.5%, 3% natural rubber latex, 3% sodium lignosulfonate, 5% active aluminum, stir 2h 105 ℃ of water-bath high speeds, oven dry, pulverizing grinds to form ultrafine powder and gets final product.

The preparation method of MBS clad nano Modification of kaolin Low Density Polyethylene foam material comprises the following steps:

(1) will add in the high-speed kneading machine with sec.-propyl distearyl acyl-oxygen base Aluminate after the nano kaoline drying, speed with 800rpm under 110 ℃ mixes 20min, add again MBS speed melt blending 15min with 1200rpm under 105 ℃, compound is moved into extruding pelletization in forcing machine, be cooled to normal temperature and namely get the nano kaoline particle that MBS coats, standby;

(2) the nano kaoline particle with LDPE, LLDPE and the above-mentioned MBS coating that makes adds in Banbury mixer together, then mixing 6min under 105 ℃ adds the remaining raw material such as magnesium hydroxide, Cellmic C 121, Trisodium Citrate to continue mixing 10min discharging successively;

(3) above-mentioned material after mixing is moved into rapidly in open refining broken-(down)rubber machine thin refining 4 times, thickness 6mm, temperature is controlled at 96 ℃, then is cut into the sheet stock of required size, weighing;

(4) appropriate sheet stock is added in the mould of preheating, in being forced into 8MPa at 168 ℃ of temperature on vulcanizing press, pressurize 12min removes foam, is cooled to normal temperature and namely gets MBS clad nano Modification of kaolin Low Density Polyethylene foam material of the present invention.

The performance test of the MBS clad nano Modification of kaolin Low Density Polyethylene foam material that the present embodiment is produced is as shown in the table:

Test item	Result
		Tensile strength (MPa)	5.4
Shock strength (kJm -2）	10.5
		Impact rebound degree (%)	43
Tear strength (kNm -1）	127
		Elongation at break (%)	189
Compression set (%)	22.4
		Modulus in flexure (MPa)	146

Claims (4)

1. MBS clad nano Modification of kaolin Low Density Polyethylene foam material, it is characterized in that, raw material by following weight part is made: LDPE 60-100, LLDPE 0-40, MBS 30-40, nano kaoline 10-20, sec.-propyl distearyl acyl-oxygen base Aluminate 2-3, magnesium hydroxide 5-10, Cellmic C 121 4-6, Trisodium Citrate 2-3, dioctyl phthalate (DOP) 5-8, benzoyl peroxide 1-1.5, calcium oxide 2-4, stearic acid 1-2, lead stearate 1-2, ethylene bis stearic acid amide 2-3, modification trees ash 3-5, UV light absorber UV-9 1-2, oxidation inhibitor 1035 2-3.

2. MBS clad nano Modification of kaolin Low Density Polyethylene foam material according to claim 1, it is characterized in that, described modification trees ash is made by following methods: first boil trees ash 20-30min with the 10-15% sodium hydroxide solution, use again distilled water rinsing Ex-all alkali, be placed in the drying in oven of 110-120 ℃, add the Silane coupling reagent KH-570 that is equivalent to trees ash weight 2-3%, the natural rubber latex of 2-3%, the sodium lignosulfonate of 3-4%, the active aluminum of 4-6%, stir 2-3h 100-110 ℃ of water-bath high speed, oven dry, pulverizing grinds to form ultrafine powder and gets final product.

3. the preparation method of MBS clad nano Modification of kaolin Low Density Polyethylene foam material according to claim 1, is characterized in that, the total weight parts of described LDPE and LLDPE is 100.

4. the preparation method of a MBS clad nano Modification of kaolin Low Density Polyethylene foam material as claimed in claim 1 is characterized in that comprising the following steps:

(1) will add in the high-speed kneading machine with sec.-propyl distearyl acyl-oxygen base Aluminate after the nano kaoline drying, speed with 500-800rpm under 110-120 ℃ mixes 20-30min, add again MBS speed melt blending 10-20min with 1000-1500rpm under 100-110 ℃, compound is moved into extruding pelletization in forcing machine, be cooled to normal temperature and namely get the nano kaoline particle that MBS coats, standby;

(2) the nano kaoline particle with LDPE, LLDPE and the above-mentioned MBS coating that makes adds in Banbury mixer together, then mixing 5-8min under 100-110 ℃ adds the remaining raw material such as magnesium hydroxide, Cellmic C 121, Trisodium Citrate to continue mixing 10-15min discharging successively;

(3) above-mentioned material after mixing is moved into rapidly in open refining broken-(down)rubber machine thin refining 2-5 time, thickness 5-8mm, temperature is controlled at 95-105 ℃, then is cut into the sheet stock of required size, weighing;

(4) appropriate sheet stock is added in the mould of preheating, be forced into 8-10MPa at ℃ temperature of 160-170 on vulcanizing press, pressurize 10-15min removes foam, is cooled to normal temperature and namely gets MBS clad nano Modification of kaolin Low Density Polyethylene foam material of the present invention.