CN102936473A - Preparation method of special polyethylene anti-seepage composite hot-melt adhesive for geotextile - Google Patents
Preparation method of special polyethylene anti-seepage composite hot-melt adhesive for geotextile Download PDFInfo
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- CN102936473A CN102936473A CN2012104887424A CN201210488742A CN102936473A CN 102936473 A CN102936473 A CN 102936473A CN 2012104887424 A CN2012104887424 A CN 2012104887424A CN 201210488742 A CN201210488742 A CN 201210488742A CN 102936473 A CN102936473 A CN 102936473A
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- melt adhesive
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Abstract
The invention discloses a preparation method of a special polyethylene anti-seepage composite hot-melt adhesive for geotextile, which comprises the following steps: adding low-density polyethylene, dimethylbenzene, water and a nonionic surfactant into a three-neck flask provided with a stirrer and a reflex condenser, heating to 70-80 DEG C to carry out swelling for 1-2 hours in a nitrogen protective atmosphere, heating to 85-95 DEG C, adding maleic anhydride, dibenzoyl peroxide and a crosslinking inhibitor, refluxing to react for 2-4 hours, stopping heating, cooling to room temperature, and carrying out vacuum filtration to obtain the maleic-anhydride-modified low-density polyethylene of which the grafting ratio is 3-7%; and proportionally mixing the obtained product with a copolyester hot-melt adhesive to obtain the special polyethylene anti-seepage composite hot-melt adhesive for geotextile. The hot-melt adhesive has the characteristic of high peel strength and is convenient to use.
Description
Technical field
The present invention relates to the preparation method of a kind of modified polyolefin/polyester composite hot melt adhesive, be specially adapted to the bonding of polyethylene anti-seepage geotextile.
Background technology
Anti-seepage geotextile claims again composite geo-membrane, be with plastics film as the antiseepage base material, with the non-woven fabric compounded geotechnological impervious material that forms, its barrier performance depends primarily on the barrier performance of plastics film.At present, the plastics film that antiseepage is both at home and abroad used mainly contains polyvinylchloride and polythene PE, and they are a kind of polymer chemistry flexible materialss, and proportion is less, and extensibility is stronger, and it is high to adapt to deformability, corrosion-resistant, low temperature resistant, good frost resistance.And non-woven fabrics also is a kind of polymeric staple fiber dimension chemical material; by acupuncture or hot sticky shaping; have higher tensile strength and extensibility; it is after plastics film is combined; tensile strength and the anti-puncture ability of plastics film have not only been increased; and because nonwoven surface is coarse, increased the frictional coefficient of contact surface, be conducive to the stable of composite geo-membrane and protective layer.Simultaneously, they have preferably erosion resistance to bacterium and chemical action, the erosion of have good effect in acid, alkali, salt.Exactly because anti-seepage geotextile has superior water-permeable, filterableness, wearing quality, thus it can be widely used in railway, highway, Stadium, dykes and dams, waterwork, Sui Dong, coastal beach, enclose and cultivate, the engineering such as environmental protection.
Polyethylene is apolar substance, and non-woven fabrics is polar material, can't be combined with each other between the two, must realize bonding lastingly to non-woven fabrics could obtaining so desirable polyethylene anti-seepage geotextile by hot melt adhesive.For the compound sticking of polar material and non-polar material, existing more patent literature.Publication number is the composite structural film that the patent of CN1401721A is mentioned a kind of polyolefine sizing agent and this hot melt adhesive of use, and this hot melt adhesive is made by modified with polar polyolefine, polyethylene, ethene-vinyl acetate, tackifying resin, mineral filler and oxidation inhibitor melt blending.This composite structural film is made by the two-sided mesh material that is compounded in enhancing of above-mentioned hot melt adhesive agent.This kind composite structural film is applied on the aluminum honeycomb panel manufacturing process, has high bonding strength and uniform bounding force, and snappiness is good, and easy to operate, and the usage period is long.Publication number is the production method that the patent of CN102344769A is mentioned a kind of used for aluminum sheath of railway data signal cable hot melt adhesive special, this hot melt adhesive adopts the mode of modification by copolymerization and chemical graft EVA, namely introduce polar group at the EVA molecular chain, because EVA and polyvinyl resin have good consistency, the polar group of introducing can play chemical bond with aluminum metal surface alumina oxide, film hydroxyl again, therefore can bond together plastics and aluminium sheath well.But above-mentioned patent is not all mentioned the hot melt adhesive for the polyethylene anti-seepage geotextile.
Summary of the invention
Main purpose of the present invention is to overcome the deficiencies in the prior art, and a kind of NEW TYPE OF COMPOSITE hot melt adhesive that can be used for the polyethylene anti-seepage geotextile is provided.
The objective of the invention is to be achieved through the following technical solutions:
A kind of preparation method of polyethylene anti-seepage geotextile specific complex hot melt adhesive may further comprise the steps:
(1) Low Density Polyethylene, water, dimethylbenzene and nonionogenic tenside are joined in the there-necked flask with agitator and reflux exchanger; under nitrogen protection, be warmed up to 70～80 ℃ of swelling 1 ~ 2h; be warming up to again 85～95 ℃; then add maleic anhydride, dibenzoyl peroxide and resistance linking agent; back flow reaction 2 ~ 4h; after reaction finishes, with resulting graft product filtration, washing, drying, namely get maleic anhydride grafting ratio and be 3 ~ 7% modified low-density polyethylene.
(2) with step (1) products therefrom and by a certain percentage blend of copolyester hot melt adhesive, namely get required hot melt adhesive.
The melting index of described Low Density Polyethylene is 22.2 ~ 26.6g/10min/160 ℃;
The melting index of described copolyester hot melt adhesive is 23 ~ 30g/10min/160 ℃, is selected from model and is a kind of in JCC-115, JCC-110 or the JCC-116 copolyester hot melt adhesive.
The quality of described water, dimethylbenzene, nonionogenic tenside, maleic anhydride, dibenzoyl peroxide and resistance linking agent is respectively by 100 parts of Low Density Polyethylene quality:
500～800 parts in water, 15～35 parts of maleic anhydrides, 35～50 parts of dimethylbenzene, 0.5～0.8 part of nonionogenic tenside, 0.5～3.0 part of dibenzoyl peroxide, 4～9 parts of resistance linking agents.
The mass ratio of described modified low-density polyethylene and copolyester hot melt adhesive is 3～5:1.
Described nonionogenic tenside is selected from a kind of among polysorbate20, sorbitan tristearate 20 and the alkylphenol polyoxyethylene OP-10.
Described resistance linking agent is selected from a kind of in DMF, N,N-dimethylacetamide, the dimethyl sulfoxide (DMSO).
Innovation of the present invention is under an amount of resistance linking agent existence condition, pass through Suspension Graft, having synthesized without obviously degree of crosslinking, percentage of grafting is 3～7% maleic anhydride modified Low Density Polyethylene, this product and the by a certain percentage blend of copolyester hot melt adhesive with certain performance, obtained high, the easy to use polyethylene anti-seepage geotextile specific complex hot melt adhesive of stripping strength again.
Embodiment
Embodiment 1
Accurately taking by weighing melting index is the Low Density Polyethylene 20.0g of 26.6g/10min; water 120.0g, dimethylbenzene 10.0g and alkylphenol polyoxyethylene OP-100.16g join in the there-necked flask with return line and agitator; under nitrogen protection, stir and be warming up to 80 ℃ of swelling 2h; add maleic anhydride 7.0g, dibenzoyl peroxide 0.5g and N after being warming up to again 90 ℃; dinethylformamide 1.5g, stopped reaction behind the stirring and refluxing reaction 4h.Products therefrom after filtration, washing, drying.Test through nuclear magnetic resonance spectroscopy, its maleic anhydride grafting ratio is 6.12%, it is 30g/10min/160 ℃ in mass ratio 4.5:1 blend of JCC-115 type copolyester hot melt adhesive powder with this product and melting index, get composite hot melt adhesive, the gained hot melt adhesive is used for bonding non-woven fabrics and PE film, and carry out peel strength test with reference to ministerial standard FZ/T01085-20000, its stripping strength is 26.34N/5cm.
Embodiment 2
Accurately taking by weighing melting index is the Low Density Polyethylene 20.0g of 22.2g/10min; water 160.0g, dimethylbenzene 8.5g and polysorbate20 0.14g join in the there-necked flask with return line and agitator; under nitrogen protection, stir and be warming up to 75 ℃ of swelling 1.5h; add maleic anhydride 6.5g, dibenzoyl peroxide 0.6g and N after being warming up to again 95 ℃; N-methylacetamide 1.6g, stopped reaction behind the stirring and refluxing reaction 3.5h.Products therefrom after filtration, washing, drying.Test through nuclear magnetic resonance spectroscopy, its maleic anhydride grafting ratio is 5.37%, it is 24g/10min/160 ℃ in mass ratio 5.0:1 blend of JCC-116 type copolyester hot melt adhesive powder with this product and melting index, get composite hot melt adhesive, the gained hot melt adhesive is used for bonding non-woven fabrics and PE film, and carry out peel strength test with reference to ministerial standard FZ/T01085-20000, its stripping strength is 28.75N/5cm.
Embodiment 3
Accurately taking by weighing melting index is the Low Density Polyethylene 20.0g of 26.6g/10min; water 100.0g, dimethylbenzene 7.0g and sorbitan tristearate 200.12g join in the there-necked flask with return line and agitator; under nitrogen protection, stir and be warming up to 70 ℃ of swelling 2.0h; add maleic anhydride 3.5g, dibenzoyl peroxide 0.2g and N after being warming up to again 85 ℃; N-N,N-DIMETHYLACETAMIDE 1.8g, stopped reaction behind the stirring and refluxing reaction 3.0h.Products therefrom after filtration, washing, drying.Test through nuclear magnetic resonance spectroscopy, its maleic anhydride grafting ratio is 4.47%, it is 30g/10min/160 ℃ in mass ratio 4.0:1 blend of JCC-115 type copolyester hot melt adhesive powder with this product and melting index, get composite hot melt adhesive, the gained hot melt adhesive is used for bonding non-woven fabrics and PE film, and carry out peel strength test with reference to ministerial standard FZ/T01085-20000, its stripping strength is 22.83N/5cm.
Embodiment 4
Accurately taking by weighing melting index is the Low Density Polyethylene 20.0g of 26.6g/10min; water 110.0g, dimethylbenzene 8.0g and alkylphenol polyoxyethylene OP-100.10g join in the there-necked flask with return line and agitator; under nitrogen protection, stir and be warming up to 75 ℃ of swelling 2.0h; add maleic anhydride 3.0g, dibenzoyl peroxide 0.10g and dimethyl sulfoxide (DMSO) 0.80g after being warming up to again 85 ℃, stopped reaction behind the stirring and refluxing reaction 3.0h.Products therefrom after filtration, washing, drying.Test through nuclear magnetic resonance spectroscopy, its maleic anhydride grafting ratio is 3.11%, it is 23g/10min/160 ℃ in mass ratio 3.5:1 blend of JCC-110 type copolyester hot melt adhesive powder with this product and melting index, get composite hot melt adhesive, the gained hot melt adhesive is used for bonding non-woven fabrics and PE film, and carry out peel strength test with reference to ministerial standard FZ/T01085-20000, its stripping strength is 20.14N/5cm.
Embodiment 5
Accurately taking by weighing melting index is the Low Density Polyethylene 20.0g of 22.2g/10min; water 110.0g, dimethylbenzene 7.5g and PS20 0.13g join in the there-necked flask with return line and agitator; under nitrogen protection, stir and be warming up to 80 ℃ of swelling 2.0h; add maleic anhydride 4.5g, dibenzoyl peroxide 0.40g and N after being warming up to again 85 ℃; N-methylacetamide 1.0g, stopped reaction behind the stirring and refluxing reaction 2.0h.Products therefrom after filtration, washing, drying.Test through nuclear magnetic resonance spectroscopy, its maleic anhydride grafting ratio is 5.37%, it is 23g/10min/160 ℃ in mass ratio 3.0:1 blend of JCC-110 type copolyester hot melt adhesive powder with this product and melting index, get composite hot melt adhesive, the gained hot melt adhesive is used for bonding non-woven fabrics and PE film, and carry out peel strength test with reference to ministerial standard FZ/T01085-20000, its stripping strength is 21.39N/5cm.
Claims (3)
1. the preparation method of a polyethylene anti-seepage geotextile specific complex hot melt adhesive is characterized in that may further comprise the steps:
(1) Low Density Polyethylene, water, dimethylbenzene and nonionogenic tenside are joined in the there-necked flask with agitator and reflux exchanger, under nitrogen protection, be warmed up to 70～80 ℃ of swelling 1 ~ 2h, be warming up to again 85～95 ℃, then add maleic anhydride, dibenzoyl peroxide and resistance linking agent, back flow reaction 2 ~ 4h, after reaction finishes, with the gained graft product successively after filtration, washing, drying, namely get maleic anhydride grafting ratio and be 3 ~ 7% modified low-density polyethylene;
(2) with step (1) products therefrom and by a certain percentage blend of copolyester hot melt adhesive, namely get required hot melt adhesive;
Described Low Density Polyethylene is 22.2 ~ 26.6g/10min 160 ℃ melting index, and described copolyester hot melt adhesive is 23 ~ 30g/10min 160 ℃ melting index;
The quality of described water, dimethylbenzene, nonionogenic tenside, maleic anhydride, dibenzoyl peroxide and resistance linking agent is respectively by 100 parts of Low Density Polyethylene quality:
500～800 parts in water, 15～35 parts of maleic anhydrides, 35～50 parts of dimethylbenzene, 0.5～0.8 part of nonionogenic tenside, 0.5～3.0 part of dibenzoyl peroxide, 4～9 parts of resistance linking agents;
The mass ratio of described modified low-density polyethylene and copolyester hot melt adhesive is 3 ~ 5:1.
2. by method claimed in claim 1, it is characterized in that described nonionogenic tenside is selected from a kind of among polysorbate20, sorbitan tristearate 20 and the alkylphenol polyoxyethylene OP-10.
3. by method claimed in claim 1, it is characterized in that described resistance linking agent is selected from a kind of in DMF, N,N-dimethylacetamide, the dimethyl sulfoxide (DMSO).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103421455A (en) * | 2013-07-03 | 2013-12-04 | 上海天洋热熔胶有限公司 | Preparation method of special composite hot melt adhesive for polyvinyl chloride decorative board |
| CN110317563A (en) * | 2019-07-08 | 2019-10-11 | 中国水利水电科学研究院 | A kind of preparation method of complex polyester hot melt adhesive, preparation method and antiscour geotextiles |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103421455A (en) * | 2013-07-03 | 2013-12-04 | 上海天洋热熔胶有限公司 | Preparation method of special composite hot melt adhesive for polyvinyl chloride decorative board |
| CN103421455B (en) * | 2013-07-03 | 2015-11-18 | 上海天洋热熔粘接材料股份有限公司 | A kind of preparation method of special composite hot melt adhesive for polyvinyl chloride decorative board |
| CN110317563A (en) * | 2019-07-08 | 2019-10-11 | 中国水利水电科学研究院 | A kind of preparation method of complex polyester hot melt adhesive, preparation method and antiscour geotextiles |
| CN110317563B (en) * | 2019-07-08 | 2020-06-09 | 中国水利水电科学研究院 | Composite polyester hot melt adhesive, preparation method and preparation method of anti-scouring geotextile |
| WO2021004410A1 (en) * | 2019-07-08 | 2021-01-14 | 中国水利水电科学研究院 | Composite polyester hot melt adhesive, preparation method therefor and preparation method for erosion-resistant geotextile |
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Owner name: SHANGHAI TIANYANG HOLT MELT ADHESIVE MATERIALS CO. Free format text: FORMER NAME: SHANGHAI TIANYANG HOTMELT ADHESIVES CO., LTD. |
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Address after: 201802 Shanghai City, Jiading District Hui Ping Lu Nanxiang Town, No. 505 Patentee after: Tianyang New Material (Shanghai) Technology Co.,Ltd. Patentee after: EAST CHINA University OF SCIENCE AND TECHNOLOGY Patentee after: Kunshan Tianyang New Material Co.,Ltd. Address before: 201802 Shanghai City, Jiading District Hui Ping Lu Nanxiang Town, No. 505 Patentee before: SHANGHAI TIANYANG HOT MELT ADHESIVE Co.,Ltd. Patentee before: EAST CHINA University OF SCIENCE AND TECHNOLOGY Patentee before: Kunshan Tianyang New Material Co.,Ltd. |
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