Preparation method of hot melt adhesive for multilayer oil tank

A technology of hot-melt adhesives and fuel tanks, applied in the direction of adhesives, layered products, grafted polymer adhesives, etc., can solve the problems of unstable adhesive force, poor resistance to fuel immersion, and large crystal size, etc., to achieve Cost-effective, environmentally friendly, and accelerated crystallization

Active Publication Date: 2013-06-26
GUANGZHOU LUSHAN NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The polyolefin materials in the prior art have the problems of large polyolefin crystal size, small crystallinity and slow crystallization speed, while the polyethylene grafts for multi-layer fuel tanks also have such problems, the grafted functional groups mainly

Method used

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  • Preparation method of hot melt adhesive for multilayer oil tank

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Embodiment 1

[0037] The preparation method of the hot-melt adhesive for the multi-layer oil tank of the present embodiment comprises the following steps:

[0038] 1) 9.6Kg of MI 2 g / 10min (2.16Kg, 190°C) metallocene-catalyzed linear low density polyethylene, 300g of homopolypropylene, 100g of maleic anhydride, 10g of 2,5-dimethyl- Mix 2,5-bis(tert-butylperoxy)hexane and 80g of nano-silica in a high-speed mixer for 30 minutes, add 100g of mineral oil or acetone, so that a small amount of initiator can be adsorbed on the surface of the resin particles, achieve their homogeneous mixing.

[0039]2) Melt and mix the above uniformly mixed materials in a twin-screw extruder, the extrusion temperature is 210°C, the unreacted monomers are removed under a vacuum of 0.1MPa, and after cooling and pelletizing, polyethylene grafts are obtained thing.

[0040] 3) Mix 2kg of the above-mentioned polyethylene graft and 8kg of bimodal linear low-density polyethylene with an MI of 1 g / 10min (2.16Kg, 190°C) ...

Embodiment 2

[0042] The preparation method of the hot-melt adhesive for the multi-layer oil tank of the present embodiment comprises the following steps:

[0043] 1) 9.5Kg of MI 2.5 g / 10min (2.16Kg, 190°C) metallocene-catalyzed linear low-density polyethylene, 500g of random copolymerized polypropylene, 150g of maleic anhydride, 30g of dicumyl peroxide and Mix 20g of DBS (dibenzylidene sorbitol) in a high-speed mixer for 30 minutes, add 100g of mineral oil or acetone, so that a small amount of initiator can be adsorbed on the surface of the resin particles to achieve their uniform mixing.

[0044] 2) Melt and mix the above uniformly mixed materials in a twin-screw extruder, the extrusion temperature is 200°C, the unreacted monomers are removed under a vacuum of 0.1MPa, and after cooling and pelletizing, polyethylene grafts are obtained thing.

[0045] 3) Mix 2.5kg of the above-mentioned polyethylene grafts and 7.5kg of linear low-density polyethylene with an MI of 1 g / 10min (2.16Kg, 190°C...

Embodiment 3

[0047] The preparation method of the hot-melt adhesive for the multi-layer oil tank of the present embodiment comprises the following steps:

[0048] 1) Add 9.8Kg of MI to 4 g / 10min (2.16Kg, 190°C) high-density polyethylene, 200g of homopolypropylene, 200g of maleic anhydride, 20g of benzoyl peroxide (BPO) and 80g of p-hydroxy Benzoic acid is mixed in a high-speed mixer for 30 minutes, and 100g of mineral oil or acetone can be added, so that a small amount of initiator can be adsorbed on the surface of the resin particles to achieve their uniform mixing.

[0049] 2) Melt and mix the above uniformly mixed materials in a twin-screw extruder, the extrusion temperature is 190°C, the unreacted monomers are removed under a vacuum of 0.1MPa, and after cooling and pelletizing, polyethylene grafts are obtained thing.

[0050] 3) Mix 1.5kg of the above-mentioned polyethylene grafts and 8.5kg of bimodal linear low-density polyethylene with an MI of 1g / 10min (2.16Kg, 190°C) in a high-spe...

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Abstract

The invention discloses a preparation method of a hot melt adhesive for a multilayer oil tank. The preparation method comprises the following steps: 1) mixing polyethylene, polypropylene, a monomer, an initiator and a polyolefin nucleating agent in a high-speed mixer, thus obtaining a pre-mixed resin after even mixing; 2) fusing, extruding and granulating the evenly-mixed pre-mixed resin by using a double-screw extruder, thereby obtaining a polyolefin grafting material; and 3) mixing the polyolefin grafting material and the polyethylene in the high-speed mixer; fusing and extruding the evenly-mixed material in the double-screw extruder, thereby obtaining the hot melt adhesive for the multilayer oil tank. The prepared hot melt adhesive has the advantages of being rapid in bonding speed as well as strong and more stable in bonding force, and has the small bonding force attenuation after being soaked in fuel oil for a long time. In addition, the bonding force of the hot melt adhesive is slightly affected by the environment and is stable at high and low temperature environments.

Description

[0001] technical field [0002] The invention relates to a method for preparing a hot melt adhesive, in particular to a method for preparing a hot melt adhesive for a multi-layer fuel tank, and belongs to the technical field of polymer composite material processing. [0003] Background technique [0004] In recent years, more and more plastic products have been used in automobiles. Automobile fuel tanks are one of the important functional and safety parts in automobile parts. Its lightweight has become its development trend. The development of multi-layer plastic fuel tanks is completely The development direction of automobile technology is consistent, and the development space of plastic fuel tanks will be greater. A multi-layer composite plastic fuel tank can be formed by multi-layer co-extrusion blow molding. It is a hollow blow molding product composed of 5 or 6 layers of 3 materials. The composition of the 5-layer composite plastic fuel tank is: HDPE (inner layer) / ad...

Claims

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Application Information

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IPC IPC(8): C09J151/06C09J11/04C09J11/06C09J11/08C08F255/02B32B7/12
Inventor 王明辉唐舫成汪加胜杜壮张阳阳
Owner GUANGZHOU LUSHAN NEW MATERIALS
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