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Hot melt adhesive for polyolefin and application thereof

A technology of hot-melt adhesives and polyolefins, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems that are difficult to meet, and ordinary adhesives cannot meet the bonding requirements of polyolefin difficult-to-bond materials, etc. problem, to achieve good bonding, stable chemical properties

Active Publication Date: 2017-06-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, ordinary adhesives cannot meet the bonding requirements of difficult-to-bond materials such as polyolefins, and some harmful substances are often added during the preparation process, which is not suitable for the medical field, and most of them are modified by modifying the main material of the adhesive. Adhesives that improve the bonding strength to polyolefin materials, but it is difficult to meet the requirements of steam cooking and sterilization in the medical field

Method used

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  • Hot melt adhesive for polyolefin and application thereof
  • Hot melt adhesive for polyolefin and application thereof
  • Hot melt adhesive for polyolefin and application thereof

Examples

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preparation example Construction

[0077] The preparation method of described hot melt adhesive comprises the following steps:

[0078] (A.1) Melt blending modified montmorillonite with random copolymerized polypropylene, halogenated butyl rubber, polyethylene glycol, and antioxidant;

[0079] (A.2) Discharging and cutting into granules to obtain the product hot melt adhesive;

[0080] In a preferred embodiment, in step (A.1), the modified montmorillonite is mixed with random copolymerized polypropylene, halogenated butyl rubber, polyethylene glycol, and antioxidant at 145°C to 190°C Melt blending for 5 minutes to 20 minutes.

[0081] In a further preferred embodiment, in step (A.1), the modified montmorillonite, random copolymerized polypropylene, halogenated butyl rubber, polyethylene glycol, and antioxidant are melted at 155°C to 180°C Blending for 10 minutes to 15 minutes;

[0082] Among them, the melting point of random copolymerized polypropylene is 125°C to 140°C, which determines that the preparation...

Embodiment 1

[0131] Preparation of modified montmorillonite by solution method

[0132] Take 25g of polyethylene glycol 8000, dry it in vacuum at 50°C for 12 hours, add the dried polyethylene glycol 8000 into 4000g of absolute ethanol, heat and stir at 60°C for 30 minutes, add 50g of raw ore to the obtained polyethylene glycol solution Montmorillonite, heated at 60°C, stirred for 3 hours, centrifuged the obtained suspension at 1000g for 5 minutes at room temperature, vacuum-dried the obtained centrifugal precipitate at 45°C, ground and sieved to obtain modified montmorillonite, the average The particle size is 200 mesh.

Embodiment 2

[0134] Preparation of Montmorillonite Modified by Melting Method

[0135] Take 25g of polyethylene glycol 8000, dry it in vacuum at 50°C for 8 hours, mix the dried polyethylene glycol 8000 with 30g of raw ore montmorillonite, grind it, then mechanically stir it at 70°C for 6 hours, let it stand for cooling at room temperature, and finally grind it and sieving to obtain modified montmorillonite with an average particle size of 200 mesh.

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Abstract

The invention discloses a hot melt adhesive for polyolefin, which is prepared from, by weight, 100 parts of polypropylene random copolymer, 1-20 parts of halogenated butyl rubber, 0.05-15 parts of modified montmorillonite, 0.05-15 parts of polyethylene glycol, and 0.01-5 parts of an antioxidant. The softening point of the hot melt adhesive is 125-140 DEG C. The softening point of the polypropylene random copolymer is 125-140 DEG C. The halogenated butyl rubber is one or two of chlorinated butyl rubber or brominated butyl rubber. The modified montmorillonite is prepared through intercalation modification to montmorillonite raw ore with polyethylene glycol. The preparation method of the hot melt adhesive includes the steps of 1) melt-blending the modified montmorillonite with the polypropylene random copolymer, halogenated butyl rubber, polyethylene glycol and antioxidant; and 2) discharging the material and shearing the material into granules to obtain a product of the hot melt adhesive. The hot melt adhesive is used for adhesion of a polyolefin thin film and a polyolefin catheter, especially, for adhesion of medical polypropylene materials.

Description

technical field [0001] The invention relates to a hot-melt adhesive, in particular to a hot-melt adhesive for bonding polyolefin materials, in particular to a hot-melt adhesive for bonding polyolefin films and polyolefin conduits. Background technique [0002] Polyolefin is a kind of polymer material with large output and wide application, among which polyethylene and polypropylene are the most important. Polypropylene is a thermoplastic synthetic resin with excellent performance, but polypropylene is a non-polar polymer with low surface energy, making it difficult to bond and blend with other polar polymers or fillers. Adhesives currently suitable for polyolefins include: ethylene-vinyl acetate copolymer (EVA) hot melt adhesives, and acrylic polymer pressure-sensitive adhesives. For example, patent CN103980849A discloses an EVA hot-melt adhesive suitable for bonding polyethylene plastics, and patent CN102559105A discloses a method for preparing an acrylate pressure-sensiti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/14C09J11/04C09J11/06C09J11/08
CPCC08K2201/011C08L2201/10C08L2201/14C08L2205/03C09J11/04C09J11/06C09J11/08C09J123/14C09J2301/304C08L23/283C08L71/02C08K9/08C08K3/346C08K5/1345C08K5/526
Inventor 陈晓农郑萌罗鑫石淑先夏宇正黄雅钦
Owner BEIJING UNIV OF CHEM TECH
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