CN102669091A

CN102669091A - Ethachlor emulsion in water and preparation method thereof

Info

Publication number: CN102669091A
Application number: CN2012101733208A
Authority: CN
Inventors: 王正权; 李彦龙
Original assignee: DALIAN RUIZE BIOLOGICAL TECHNOLOGY Co Ltd
Current assignee: DALIAN RUIZE BIOLOGICAL TECHNOLOGY Co Ltd
Priority date: 2012-05-31
Filing date: 2012-05-31
Publication date: 2012-09-19

Abstract

Disclosed is an ethachlor emulsion in water. The ethachlor emulsion in water is characterized by comprising 5 wt.%-60 wt.% of ethachlor, 5 wt.%-30 wt.% of emulsifying agents, 1 wt.%-8 wt.% of antifreeze agents, 0.5 wt.%-5 wt.% of thickening agents and 31.5 wt.%-88 wt.% of water. Compared with existing emulsifiable concentrates, the ethachlor emulsion in water has the advantages of being free from firing and explosion hazards and odorous poisonous smells and small in irritation on eyes, pollution on the environment is reduced, safety of production, storing and users is greatly improved, and the manufacturing costs are reduced to an extent due to the fact that cheap water is used as a substrate.

Description

A kind of kecaoan aqueous emulsion and preparation method thereof

Technical field

The present invention relates to a kind of pesticidal preparations, relate to a kind of aqueous emulsion that contains kecaoan specifically.

Background technology

Kecaoan, chemical name is: 2-ethyl-N-(ethoxymethyl)-alpha-chloro acetanil, English 2-ethyl-N-(ethoxymethyl) by name-α-chloracetylanilide.

Structural formula:

Kecaoan is the amides pesticide weed killer herbicide; The protein synthesis that suppresses sensitive plant; Can be used for rice transplanting field, soybean, corn, peanut etc. and mainly prevent and kill off needle spikesedge herb; Annual gramineous weeds such as barnyard grass grass and dog tail, lady's-grass, Monochoria vaginalis also have certain preventive effect to some annual broadleaf weeds such as kitchen gardens.

Still be main with missible oil in China kecaoan selling market at present; In the missible oil processing in a large number with an organic solvent (toluene, xylol) as matrix, this type organic solvent is inflammable and explosive, serious environment pollution; And people and animals are constituted direct harm, also waste a large amount of non-renewable resources.In recent years, along with the attention of global various countries to environmental protection, require the pesticides new formulation of exploitation safety, environmental protection, wherein aqueous emulsion (EW) replaces inflammable, explosive, poisonous oil-based formulation missible oil, is just becoming the direction of pesticidal preparations development in the world.

Summary of the invention

The object of the present invention is to provide a kind of not with an organic solvent, the kecaoan preparation of Environmental Safety, a kind of method for preparing said kecaoan aqueous emulsion is provided simultaneously.

Technical scheme of the present invention is:

The component and the percentage by weight of said kecaoan aqueous emulsion are:

Kecaoan 5%～60%

Emulsifier 5%～30%

Antifreeze 1%～8%

Thickener 0.5%～5%

Water 33.5%～88%

Said emulsifier is a NPE; AEO; Castor oil polyoxyethylene ether; Polyoxyethylene carboxylate; The phenethyl phenol polyethenoxy ether; APES; The APES formaldehyde condensation products; Calcium dodecyl benzene sulfonate; Dodecyl benzyl dimethyl ammonium chloride; Special OPEO; Alkylaryl polyoxyethylene polyoxypropylene ether; APES; The coconut oil alkanolamide; Polyoxyethylene stearic acid ester; The lauric acid polyoxyethylene ester; Fatty alcohol phosphate; In the aliphatic acid polyethenoxy ether one or more.

Said antifreeze is a kind of in ethylene glycol, polyethylene glycol, glycerine, the urea.

Said thickener is a kind of in hydroxypropyl cellulose, hydroxyethylcellulose, xanthans, polyethylene glycol, polyvinyl alcohol, propyl cellulose, the ethyl cellulose.

Said water is deionized water or distilled water.

The present invention also provides a kind of method for preparing the kecaoan aqueous emulsion, may further comprise the steps:

(1) in kecaoan, add emulsifier, the formation oil phase stirs.

(2) thickener is added to the water, the formation water stirs.

(3) pour the oil phase for preparing into water, the formation stable emulsion stirs.

(4) add antifreeze at last, stir, promptly make the kecaoan aqueous emulsion.

Advantage of the present invention:

Kecaoan aqueous emulsion of the present invention is compared with existing missible oil and is had the following advantages:

1. owing to do not contain or only contain poisonous, inflammable on a small quantity organic solvent, unassured prevailing exploded danger, and no unpleasant toxic odor is little to eye irritation, has reduced the pollution to environment, has improved the safety to production, storing and user greatly.

2. the water with cheapness is matrix, and manufacturing cost has the reduction of different amplitudes.

3. the requirement to packing container also can not show a candle to the missible oil harshness, can reduce packing cost.

4. warm blooded animal toxicity is reduced greatly,, good to plant with other agricultural chemicals and fertilizer miscibilty than missible oil safety.

The present invention has adopted a kind of low cost, has been convenient to the kecaoan method for producing aqueous emulsion and the technology of suitability for industrialized production.

Embodiment

Embodiment 1

5% kecaoan aqueous emulsion preparation (weight ratio)

Kecaoan 5%

AEO 4%

Calcium dodecyl benzene sulfonate 6%

Glycerine 4%

Xanthans 1%

Distilled water 80%

In the 5g kecaoan, add the 4g AEO; The 6g calcium dodecyl benzene sulfonate; The formation oil phase that stirs, with the 4g glycerine, the 1g xanthans adds the formation water that stirs in the distilled water; The water for preparing is poured in the oil phase and opened high speed shear 30 minutes (3000 rev/mins of shear rates) forms stable emulsion, promptly make 5% kecaoan aqueous emulsion.

Embodiment 2

40% kecaoan aqueous emulsion preparation (weight ratio)

Kecaoan 40%

AEO 3%

Polyoxyethylene stearic acid ester 6%

Glycerine 4%

Xanthans 1%

Distilled water 46%

In the 40g kecaoan, add the 3g AEO; The 6g polyoxyethylene stearic acid ester; The formation oil phase that stirs, with the 4g glycerine, the 1g xanthans adds the formation water that stirs in the distilled water; The water for preparing is poured in the oil phase and opened high speed shear 30 minutes (3000 rev/mins of shear rates) forms stable emulsion, promptly make 40% kecaoan aqueous emulsion.

Embodiment 3

50% kecaoan aqueous emulsion preparation (weight ratio)

Kecaoan 50%

Castor oil polyoxyethylene ether 1.5%

Polyoxyethylene carboxylate 5%

Propane diols 4%

Polyethylene glycol 0.5%

Distilled water 39%

In the 50g kecaoan, add the 1.5g castor oil polyoxyethylene ether; The 5g polyoxyethylene carboxylate; The formation oil phase that stirs, with the 4g propane diols, the 0.5g polyethylene glycol joins the formation water that stirs in the distilled water; The water for preparing is poured in the oil phase and opened high speed shear 30 minutes (3000 rev/mins of shear rates) forms stable emulsion, promptly make 50% kecaoan aqueous emulsion.

Embodiment 4

60% kecaoan aqueous emulsion preparation (weight ratio)

Kecaoan 60%

NPE 2%

Lauric acid polyoxyethylene ester 4%

Urea 8%

Xanthans 0.5%

Distilled water 25.5%

In the 60g kecaoan, add 2g NPE, 4g lauric acid polyoxyethylene ester; The formation oil phase stirs; 8g urea, 0.5g xanthans are joined the formation water that stirs in the distilled water; The water for preparing is poured in the oil phase and opened high speed shear 30 minutes (3000 rev/mins of shear rates) forms stable emulsion, promptly make 60% kecaoan aqueous emulsion.

More than the product index of three embodiment see table 1

The traditional performance index of table 1 preparation

Sequence number	Kecaoan content	Outward appearance	Lasting foaming characteristic	Heat storage stability	Freeze and melt examination
						Embodiment 1	5.1%	The white uniform liquid	Qualified	Qualified	Qualified
Embodiment 2	40.2%	The white uniform liquid	Qualified	Qualified	Qualified
						Embodiment 3	49.9%	The white thick liquid	Qualified	Qualified	Qualified
Embodiment 4	60.3%	The white thick liquid	Qualified	Qualified	Qualified

The kecaoan aqueous emulsion was stored 14 days in (54 ± 2) ℃ insulating box, before and after storage, used the content of gas chromatographic analysis effective ingredient respectively, analytical error is ± 1%, and the result sees table 2.It is thus clear that kecaoan aqueous emulsion heat storage stability is good.

Table 2 kecaoan aqueous emulsion heat storage stability result

Sequence number	Content before storing	Store back content	Resolution ratio	Heat storage back outward appearance	Heat storage back emulsifying dispersivity
						Embodiment 1	5.1%	5.1%	0	The homogeneous phase milky white liquid	The homogeneous phase milky white liquid
Embodiment 2	40.2%	40.0%	0.5%	The homogeneous phase milky white liquid	The homogeneous phase milky white liquid
						Embodiment 3	49.9%	49.9%	0%	The homogeneous phase milky white liquid	The homogeneous phase milky white liquid
Embodiment 4	60.3%	60.1%	0.3%	The homogeneous phase milky white liquid	The homogeneous phase milky white liquid

Result of the test shows: according to can both the be up to state standards requirement of GB/T1603-2001 of the kecaoan aqueous emulsion bin stability of the present invention preparation.

Comparative Examples 1

The contrast of the kecaoan aqueous emulsion controlling weeds test of pesticide effectiveness

Through above-mentioned contrast, the result shows: the kecaoan aqueous emulsion of the present invention's preparation and kecaoan missible oil consumption quite can the effectively preventing rice weeds.

Claims

1. kecaoan aqueous emulsion, it is characterized in that: the component and the percentage by weight of said kecaoan aqueous emulsion are:

Kecaoan 5%～60%

Emulsifier 5%～30%

Antifreeze 1%～8%

Thickener 0.5%～5%

Water 31.5%～88%.

2. kecaoan aqueous emulsion according to claim 1 is characterized in that: said emulsifier is selected from one or more in NPE, AEO, castor oil polyoxyethylene ether, polyoxyethylene carboxylate, phenethyl phenol polyethenoxy ether, APES, APES formaldehyde condensation products, calcium dodecyl benzene sulfonate, dodecyl benzyl dimethyl ammonium chloride, special OPEO, alkylaryl polyoxyethylene polyoxypropylene ether, APES, coconut oil alkanolamide, polyoxyethylene stearic acid ester, lauric acid polyoxyethylene ester, fatty alcohol phosphate, the aliphatic acid polyethenoxy ether.

3. kecaoan aqueous emulsion according to claim 1 is characterized in that: said antifreeze is selected from a kind of in ethylene glycol, polyethylene glycol, glycerine, the urea.

4. kecaoan aqueous emulsion according to claim 1 is characterized in that: said thickener is selected from a kind of in hydroxypropyl cellulose, hydroxyethylcellulose, xanthans, polyethylene glycol, polyvinyl alcohol, propyl cellulose, the ethyl cellulose.

5. kecaoan aqueous emulsion according to claim 1 is characterized in that: said water is deionized water or distilled water.

6. prepare the preparation method of kecaoan aqueous emulsion according to claim 1, it is characterized in that: may further comprise the steps:

(1) in kecaoan, add emulsifier, the formation oil phase stirs;

(2) thickener is added to the water, the formation water stirs;

(3) pour the oil phase for preparing into water, the formation stable emulsion stirs;

(4) add antifreeze at last, stir, promptly make the kecaoan aqueous emulsion.