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Special adhesive for liquid pesticide bags

A technology for adhesives and pesticides, applied in the field of adhesives for liquid pesticide bags, can solve problems such as peeling, harm, and pesticide leakage

Inactive Publication Date: 2011-12-21
JIANGSU LIHE ADHESIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, liquid pesticide packaging is generally packaged in glass bottles. Although glass bottles have the advantages of good sealing, low permeability, strong corrosion resistance, and long-term storage, they are not easy to deteriorate, but glass bottles are fragile and inconvenient to transport. In order to overcome the above shortcomings, People use polyester bottles to replace glass bottles. Although they overcome the problem of fragility, polyester bottles, like glass bottles, have a small volume-to-capacity ratio and weight-to-capacity ratio, and the transportation cost is too high.
The use of flexible packaging compound bags for pesticides can effectively overcome many shortcomings of bottle packaging. The flexible packaging of liquid pesticides is an inevitable development direction in the future. Due to the diversity and corrosiveness of pesticides, the existing adhesives for food and drug bags cannot meet The packaging requirements of liquid pesticides must use special adhesives, which must have excellent corrosion resistance, otherwise they will be easily swelled by the solvent in the pesticides, and the layers of the composite bag will be peeled off, resulting in pesticide leakage and great harm. In order to adapt to liquid pesticides To meet the development needs of flexible packaging, it is necessary to develop such special adhesives for flexible packaging

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] The specific preparation process of this example:

[0023] ① Preparation of main glue A: Add 520g polyester polyol to the container, then add 100g ethyl acetate, stir evenly, add TDI 63g, react for 2 hours, dimethylol propionic acid 26g, react for 1 hour, then Add 25g of r-aminopropyltriethoxysilane and 45g of epoxy resin, react for 1 hour, add the remaining solvent 455g, stir evenly to obtain a solution with a solid content of 55%, and a viscosity of 1600mpa / s;

[0024] Described polyester polyol is obtained by following method:

[0025] Raw materials used: adipic acid 205g, isophthalic acid (OP) 138.3g, dimethyl terephthalate 52g polycaprolactone diol 80g, ethylene glycol (EG) 136.3g, 1,4 butanediol 95g, neopentyl glycol 30g, catalyst tetrabutyl titanate 105ppm, its preparation method adopts aforementioned vacuum melting method, makes polyester alcohol hydroxyl value 56mgKOH / g, acid value 0.8mgKOH / g;

[0026] ②Preparation of curing agent B: Add 546g of TDI and 300g ...

example 2

[0029] The specific preparation process of this example:

[0030] ① Preparation of main rubber A: Add 820g polyester polyol to the container, then add 250g ethyl acetate, stir well, add TDI 75g, react for 2 hours, dimethylol propionic acid 47g, react for 1.5 hours, then add Epoxy resin (E) 73g and r-aminopropyltriethoxysilane 30g, add the remaining solvent 436.6g, stir evenly to obtain a solution with a solid content of 60%, and a viscosity of 3800mpa / s;

[0031] Described polyester polyol is obtained by following method:

[0032] Raw materials used: 156g of adipic acid, 227.3g of sebacic acid, 257.3g of isophthalic acid (OP), 115g of polycaprolactone diol, 124.3g of ethylene glycol (EG), 155g of 1,4 butanediol, Neopentyl glycol 116g, catalyst tetrabutyl titanate 150ppm, its preparation method adopts aforementioned vacuum melting method, makes polyester alcohol hydroxyl value 50mgKOH / g, acid value 0.68mgKOH / g;

[0033] ②Preparation of curing agent B: Add 590g of TDI and 250g...

example 3

[0036] The specific preparation process of this example:

[0037] ① Preparation of main rubber A: Add 635g polyester polyol to the container, then add 150g ethyl acetate, stir evenly, add TDI 58g, react for 2 hours, add dimethylolpropionic acid 29g, react for 2 hours, then Add 62g of epoxy resin (E) and 23g of r-aminopropyltriethoxysilane, add the remaining solvent 195.8g, stir evenly to obtain a solution with a solid content of 70%, and a viscosity of 9700mpa / s;

[0038] Described polyester polyol is obtained by following method:

[0039] Raw materials used: adipic acid 194g, isophthalic acid (OP) 176g, terephthalic acid 45g, polycaprolactone diol 83g, ethylene glycol (EG) 112g, 1,4 butanediol 85g, neopentyl Diol 124g, catalyst (tetrabutyl titanate) 110ppm, its preparation method adopts aforementioned vacuum melting method, makes polyester alcohol hydroxyl value 57mgKOH / g, acid value 0.45mgKOH / g;

[0040] ②Preparation of curing agent B: Add 390g of TDI and 500g of ethyl ace...

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Abstract

The invention discloses a special adhesive for liquid pesticide bagging and a preparation method thereof. It is prepared from two kinds of main glue A and curing agent B, the weight ratio of which is 10:2-4, and the combination of main glue A Parts and their weight percentages are: polyester polyol 42%-55%, reinforcing agent 1%-10%, modifier 5%-10%, isocyanate 4%-9%, solvent 30%-45% ; The components and weight percentages of the curing agent B are: 39% to 59% of toluene diisocyanate (TDI), 25% to 50% of solvent, and 11% to 16% of trimethylolpropane (TMP). The modified polyurethane adhesive with better pesticide resistance is obtained by introducing different contents of epoxy groups, silyl groups, and carboxyl groups into the polyurethane adhesive for modification.

Description

Technical field: [0001] The invention relates to an industrial adhesive, in particular to an adhesive for liquid pesticide bags. Background technique: [0002] At present, liquid pesticide packaging is generally packaged in glass bottles. Although glass bottles have the advantages of good sealing, low permeability, strong corrosion resistance, and long-term storage, they are not easy to deteriorate, but glass bottles are fragile and inconvenient to transport. In order to overcome the above shortcomings, People use polyester bottles to replace glass bottles. Although the problem of fragility is overcome, polyester bottles, like glass bottles, have a small volume-to-capacity ratio and weight-to-capacity ratio, and the transportation cost is too high. The use of flexible packaging compound bags for pesticides can effectively overcome many shortcomings of bottle packaging. The flexible packaging of liquid pesticides is an inevitable development direction in the future. Due to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J167/00B65D33/18B65D85/84
Inventor 蔡炳照钟树良
Owner JIANGSU LIHE ADHESIVE