CN104839198B - Thermosensitive pesticide slow release agent for preventing and treating carposina niponensis walshingham - Google Patents
Thermosensitive pesticide slow release agent for preventing and treating carposina niponensis walshingham Download PDFInfo
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 24
- 239000000575 pesticide Substances 0.000 title claims abstract description 23
- 241001347511 Carposina sasakii Species 0.000 title abstract description 3
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims abstract description 12
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims abstract description 12
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims abstract description 11
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims abstract description 11
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000008367 deionised water Substances 0.000 claims abstract description 8
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 8
- 235000010262 sodium metabisulphite Nutrition 0.000 claims abstract description 8
- 229920001661 Chitosan Polymers 0.000 claims abstract description 7
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 claims abstract description 7
- 229940001584 sodium metabisulfite Drugs 0.000 claims abstract description 7
- 241001198505 Anarsia lineatella Species 0.000 claims description 18
- 239000007864 aqueous solution Substances 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000005946 Cypermethrin Substances 0.000 claims description 8
- KAATUXNTWXVJKI-UHFFFAOYSA-N cypermethrin Chemical compound CC1(C)C(C=C(Cl)Cl)C1C(=O)OC(C#N)C1=CC=CC(OC=2C=CC=CC=2)=C1 KAATUXNTWXVJKI-UHFFFAOYSA-N 0.000 claims description 8
- 229960005424 cypermethrin Drugs 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 239000003643 water by type Substances 0.000 claims description 8
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 239000012467 final product Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 6
- 229920000642 polymer Polymers 0.000 abstract description 6
- 239000000017 hydrogel Substances 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 4
- 239000000178 monomer Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- KAATUXNTWXVJKI-NSHGMRRFSA-N (1R)-cis-(alphaS)-cypermethrin Chemical compound CC1(C)[C@@H](C=C(Cl)Cl)[C@H]1C(=O)O[C@H](C#N)C1=CC=CC(OC=2C=CC=CC=2)=C1 KAATUXNTWXVJKI-NSHGMRRFSA-N 0.000 abstract 1
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 abstract 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 abstract 1
- 230000001419 dependent effect Effects 0.000 abstract 1
- 229920001187 thermosetting polymer Polymers 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 239000003905 agrochemical Substances 0.000 description 6
- 239000005944 Chlorpyrifos Substances 0.000 description 4
- SBPBAQFWLVIOKP-UHFFFAOYSA-N chlorpyrifos Chemical compound CCOP(=S)(OCC)OC1=NC(Cl)=C(Cl)C=C1Cl SBPBAQFWLVIOKP-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- 239000003094 microcapsule Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 150000003053 piperidines Chemical class 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000013268 sustained release Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 244000144730 Amygdalus persica Species 0.000 description 2
- 241000723353 Chrysanthemum Species 0.000 description 2
- 235000007516 Chrysanthemum Nutrition 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 235000006040 Prunus persica var persica Nutrition 0.000 description 2
- NCSHGROOCJHAFK-UHFFFAOYSA-N [Cl].N#CC#N Chemical compound [Cl].N#CC#N NCSHGROOCJHAFK-UHFFFAOYSA-N 0.000 description 2
- 230000010933 acylation Effects 0.000 description 2
- 238000005917 acylation reaction Methods 0.000 description 2
- 238000009395 breeding Methods 0.000 description 2
- 230000001488 breeding effect Effects 0.000 description 2
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- 235000013399 edible fruits Nutrition 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
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- 230000035945 sensitivity Effects 0.000 description 2
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- 239000012730 sustained-release form Substances 0.000 description 2
- 241001347514 Carposinidae Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 241000255777 Lepidoptera Species 0.000 description 1
- 241000220225 Malus Species 0.000 description 1
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- 241000220324 Pyrus Species 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
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- 239000004480 active ingredient Substances 0.000 description 1
- 238000012271 agricultural production Methods 0.000 description 1
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- 239000011557 critical solution Substances 0.000 description 1
- DIOQZVSQGTUSAI-UHFFFAOYSA-N decane Chemical compound CCCCCCCCCC DIOQZVSQGTUSAI-UHFFFAOYSA-N 0.000 description 1
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- 150000004676 glycans Chemical class 0.000 description 1
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- 230000009965 odorless effect Effects 0.000 description 1
- 235000021017 pears Nutrition 0.000 description 1
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Abstract
The invention discloses a thermosensitive pesticide slow release agent for preventing and treating carposina niponensis walshingham. The thermosensitive pesticide slow release agent comprises the following materials in parts by weight: 0.8-1.3 parts of beta-cypermethrin, 0.4-1.0 part of N-piperdinyl acrylamide, 0.4-1.0 part of hydroxypropyl methylcellulose, 0.2-0.4 part of N-maleoyl chitosan, 0.2-0.4 part of sodium persulfate, 0.2-0.4 part of sodium metabisulfite, 0.2-0.4 part of sodium dodecyl sulfate and 35-65 parts of deionized water. This invention selects N-piperdinyl acrylamide as a monomer material and hydroxypropyl methyl cellulose as an interpenetrating material to synthesize an interpenetrating polymer network so as to improve the defects of polypiperdinyl crylamide. In an IPN hydrogel, no chemical bonds are available between N-piperdinyl acrylamide and hydroxypropyl methyl cellulose. The polymers are relatively dependent. The characteristic of mutual independence and interdependence determines the special properties of the IPN hydrogel, so that the interpenetrating polymer network polymer generated effectively improves the original defects of polypiperdinyl crylamide.
Description
Technical field
The invention belongs to pesticide production technology field, and in particular to a kind of temperature sensitivity to external world is higher, for preventing and treating
The pesticide slow-releasing agent of small heart-eating peach worm.
Background technology
With whole society's environmental protection and the continuous enhancing of Consciousness of food security, the production and use of agricultural chemicals are born to environment
Face rings the concern for increasingly causing people, and environmental regulation is increasingly strict, and Residual Pesticides in Farm Produce limit standard threshold is constantly carried
Height, pesticide producing is faced with increasingly stern challenge.Pesticide industry " 12 " planning in will " energetically promotion the formulations of pesticide to
The efficient secure side such as water baseization, dustlessization, control release is to development " as key task from now on.Some safety, economic, province
The formulation of power is being studied and applied.So that in the agricultural chemicals that is actually sprayed onto on crop target, traditional formulations of pesticide only have
20-30% is used effectively, and this not only economically causes to waste, and causes large-area environmental pollution.Pesticide slow-releasing agent
It is, using physically or chemically means, agricultural chemicals is stored in the processing variety of agricultural chemicals, and dosage as required, specific time
Continual and steady release, to reach the purpose of economic, safe and effective control disease pest and weed.Pesticide slow-release technology can be effective
Solution pesticide activity component is unstable, the duration is short, the low problem of effective rate of utilization, and sustained releaseization is to adapt to pesticides application technology
One of formulations of pesticide important development direction of development need, is also the important component part for developing green agriculture.
Small heart-eating peach worm Asiaarposina sasakii (Matsmura), referred to as " peach is little ", also known as peach fruit moth, it is commonly called as
" borer ", belongs to Lepidoptera, Carposinidae.It is that maximum, the most common food heart of occurring area is endangered in northern China production of fruit trees
Insects insect, its feeding habits are miscellaneous, can endanger the fruit of the planting fruit-trees more than 10 such as apple, jujube, pears, and 1-3 generations occur for 1 year, most 2 generations,
Oblate winter cocoon is tied in soil with mature larva to survive the winter, before and after mid-April in next year (northern the first tenday period of a month in May), after meeting rain, larva starts
Cocoon-break is unearthed, and being unearthed can continue up to mid-July, and May early and middle ten dayses are the Sheng phase of being unearthed.The generation of small heart-eating peach worm with it is warm, wet
Degree is in close relations.Overwintering Larvae is unearthed phase beginning, when mean of dekan temperature reach 16.9 DEG C, ground temperature reach 19.7 DEG C when, if suitable
When precipitation, you can continuous excavation., at 21-27 DEG C, relative humidity is more than 75%, and the breeding to adult is favourable for temperature；High temperature,
The disadvantage of reproduction to adult is dried, long-term rainy or storm suppresses the activity and spawning of adult.Occur using small heart-eating peach worm
Time length and the characteristics of to very temperature sensitive, if the active ingredient such as agricultural chemicals by preventing and treating small heart-eating peach worm is using sustained release agent
Mode is placed in land for growing field crops, within specified temperatures continual and steady release, can reach that long-acting, to reduce pollution, economic control peach little
The purpose of heart-eating worm.
The content of the invention
It is an object of the present invention to provide a kind of temperature sensitive type pesticide slow-releasing agent for preventing and treating small heart-eating peach worm, the sustained release agent has
Good biocompatibility, bioavilability is high, and mechanical strength is excellent, easily operated the advantages of use in agricultural production, can be
Release farm chemical ingredients suppress the growth and breeding of small heart-eating peach worm in longer period, and agricultural chemicals is not only increased compared with prior art
Effective rate of utilization, and labour has been saved, cost is reduced, protect environment.
A kind of temperature sensitive type pesticide slow-releasing agent for preventing and treating small heart-eating peach worm, it include following masses part into being grouped into：
Effective cypermethrin 0.8-1.3 parts, N- piperidines acrylamide 0.4-1.0 parts, hydroxypropyl methyl cellulose 0.4-1.0 parts, N- horses
Come acylation chitosan 0.2-0.4 parts, sodium peroxydisulfate 0.2-0.4 parts, Sodium Metabisulfite 0.2-0.4 parts, lauryl sodium sulfate
0.2-0.4 parts and deionized water 35-65 part.
A kind of method for processing the temperature sensitive type pesticide slow-releasing agent of above-mentioned preventing and treating small heart-eating peach worm, comprises the following steps：
(1) 0.2-0.4 mass parts lauryl sodium sulfate is dissolved in 10-20 mass parts deionized waters, you can obtain one
Kind of mixed solution, then by mixed solution under conditions of rotating speed is 1500-3000rpm with the efficient chlorine cyanogen of 0.8-1.3 mass parts
Chrysanthemum ester mixes, and generates a kind of dispersion liquid；
(2) by 0.4-1.0 mass parts N- piperidines acrylamides, 0.4-1.0 mass parts hydroxypropyl methyl cellulose and 0.2-
0.4 mass parts N- Nmaleoyl chitosan is dissolved completely in 5-100 mass parts deionized waters and generates a kind of aqueous solution；
(3) nitrogen is passed through in the aqueous solution for preparing in step 2, dispersion liquid and the 0.2- prepared in step 1 is slowly added to
0.4 mass parts Sodium Metabisulfite and 0.2-0.4 mass parts sodium peroxydisulfates, are crosslinked under the conditions of 60 DEG C in sealing reactor
Polymerisation 5h, then cools down, and filters, and deionized water rinses solid formation twice, after filtration is drained, is dried under vacuum to constant weight,
Obtain final product.
In the present invention effective cypermethrin is effective insecticidal constituent；N- piperidines acrylamide is in itself a kind of monomer, Jing
The poly- piperidines acrylamide being polymerized is a kind of temperature sensitivity macromolecule hydrogel, is widely used in medicine sustained and controlled release
System, it can occur reversible expansion and contraction with the change of environment temperature, and so as to realize the release of medicine, its low temperature is critical
Solution temperature (LCST) at 17 DEG C or so, the unearthed temperature of close small heart-eating peach worm；However, poly- piperidines acrylamide itself is also deposited
In the speed of response slowly, the shortcomings of poor biocompatibility, greatly limit its application in terms of agriculture slow-releasing system；Hydroxypropyl first
Base cellulose is a kind of important compound ether, category nonionic, water-soluble polymer, odorless, tasteless, nontoxic, because it has
Preferably hardness, wettability, disintegration and biocompatibility, are widely used in the industries such as food, medicine, are at present both at home and abroad
One of medicinal maximum auxiliary material；The present invention is with N- piperidines acrylamides as monomer material, with hydroxypropyl methyl cellulose as IPN
Materials synthesis interpenetrating net polymer is improving the defect of poly- piperidines acrylamide.In IPN hydrogels, N- piperidines acrylamides
Without chemical bonding and hydroxypropyl methyl cellulose molecule between, each polymer has relative independence, this both mutually only
Vertical and complementary characteristic determines the special nature of IPN hydrogels, and the interpenetrating net polymer for thus generating is effectively improved
Poly- piperidines acrylamide original defect.
Description of the drawings
In order to be illustrated more clearly that the present invention, embodiment is briefly described below in conjunction with accompanying drawing.
Fig. 1 is the releasing curve diagram of the agent of effective cypermethrin temp-sensitive, slow-releasing and chlorpyrifos microcapsule agent in embodiment 2.
Specific embodiment
The specific embodiment of the present invention is given below
Embodiment 1：
A kind of temperature sensitive type pesticide slow-releasing agent for preventing and treating small heart-eating peach worm, it include following masses part into being grouped into：
Effective cypermethrin 0.8-1.3 parts, N- piperidines acrylamide 0.4-1.0 parts, hydroxypropyl methyl cellulose 0.4-1.0 parts, N- horses
Come acylation chitosan 0.2-0.4 parts, sodium peroxydisulfate 0.2-0.4 parts, Sodium Metabisulfite 0.2-0.4 parts, lauryl sodium sulfate
0.2-0.4 parts and deionized water 35-65 part.
A kind of method for processing the temperature sensitive type pesticide slow-releasing agent of above-mentioned preventing and treating small heart-eating peach worm, comprises the following steps：
(1) 0.2-0.4 mass parts lauryl sodium sulfate is dissolved in 10-20 mass parts deionized waters, you can obtain one
Kind of mixed solution, then by mixed solution under conditions of rotating speed is 1500-3000rpm with the efficient chlorine cyanogen of 0.8-1.3 mass parts
Chrysanthemum ester mixes, and generates a kind of dispersion liquid；
(2) by 0.4-1.0 mass parts N- piperidines acrylamides, 0.4-1.0 mass parts hydroxypropyl methyl cellulose and 0.2-
0.4 mass parts N- Nmaleoyl chitosan is dissolved completely in 5-100 mass parts deionized waters and generates a kind of aqueous solution；
(3) nitrogen is passed through in the aqueous solution for preparing in step 2, dispersion liquid and the 0.2- prepared in step 1 is slowly added to
It is scattered under 0.4 under 5-50 mass parts Sodium Metabisulfite and 0.2-0.4 and is scattered in 5-50 mass parts sodium peroxydisulfates, it is anti-in sealing
Answer and carry out under the conditions of 60 DEG C in device cross-linking polymerization 5h, then cool down, filter, deionized water rinses solid formation twice, mistake
After filter is drained, constant weight is dried under vacuum to, is obtained final product.
Embodiment 2：
(1) weigh 0.3g lauryl sodium sulfate to be dissolved in 10g deionized waters, by 0.8g effective cypermethrins in rotating speed
To be dispersed therein under the conditions of 2000rpm, dispersion liquid I is formed.
(2) 0.650g N- piperidines acrylamides, 0.650g hydroxypropyl methyl celluloses, 0.08gN- maleylation shells are weighed
Glycan is dissolved completely in formation aqueous solution II in 70.0g deionized waters.
(3) after being passed through nitrogen in aqueous solution II, by 0.010g Sodium Metabisulfites, 0.012g sodium peroxydisulfates, and dispersion
Liquid I is added in aqueous solution II, and be sealed in glass reaction vessel carries out cross-linking polymerization, successive reaction 5h in 60 DEG C of water-baths
Afterwards, cool down, deionized water is rinsed, and is dried under vacuum to constant weight, is obtained final product.
By a kind of slow release effect of the effective cypermethrin temp-sensitive, slow-releasing agent obtained by according to step in the present embodiment with
The slow release effect of chlorpyrifos microcapsule agent compares test, and contrast effect between the two is referring to table 1 and Fig. 1；
The effective cypermethrin temp-sensitive, slow-releasing agent of table 1 (is released with the slow release effect comparative test result of chlorpyrifos microcapsule agent
Put 3 days)
By a kind of effective cypermethrin temp-sensitive, slow-releasing agent obtained by according to step in the present embodiment to small heart-eating peach worm
The prevention effect of larva compares test with chlorpyrifos microcapsule agent to the prevention effect of small heart-eating peach worm larva, between the two
Contrast effect is referring to table 2；
The controlling experiment comparing result (release 3 days) of the temperature sensitive type pesticide slow-releasing agent of table 2 and small heart-eating peach worm larva
Note：Small letter parent phase is not notable (P ＞ 0.05) with difference is represented in table；Capitalization is different to represent that difference is extremely notable
(P ＜ 0.01).
Claims (2)
1. a kind of temperature sensitive type pesticide slow-releasing agent for preventing and treating small heart-eating peach worm, it is characterised in that it include following masses part into
It is grouped into：Effective cypermethrin 0.8-1.3 parts, N- piperidines acrylamide 0.4-1.0 parts, hydroxypropyl methyl cellulose 0.4-1.0
Part, N- Nmaleoyl chitosan 0.2-0.4 parts, sodium peroxydisulfate 0.2-0.4 parts, Sodium Metabisulfite 0.2-0.4 parts, dodecyl
Sodium sulphate 0.2-0.4 parts and deionized water 35-65 part.
2. a kind of method that the temperature sensitive type pesticide slow-releasing agent of small heart-eating peach worm is prevented and treated described in processing claim 1, its feature exists
Comprise the following steps in it：
(1) 0.2-0.4 mass parts lauryl sodium sulfate is dissolved in 10-20 mass parts deionized waters, you can obtain a kind of mixed
Close solution, then by mixed solution rotating speed be 1500-3000rpm under conditions of with 0.8-1.3 mass parts effective cypermethrins
Mixing, generates a kind of dispersion liquid；
(2) by 0.4-1.0 mass parts N- piperidines acrylamides, 0.4-1.0 mass parts hydroxypropyl methyl cellulose and 0.2-0.4 matter
Amount part N- Nmaleoyl chitosans are dissolved completely in 5-100 mass parts deionized waters and generate a kind of aqueous solution；
(3) nitrogen is passed through in the aqueous solution for preparing in step 2, dispersion liquid and the 0.2-0.4 matter prepared in step 1 is slowly added to
Amount part Sodium Metabisulfite and 0.2-0.4 mass parts sodium peroxydisulfates, 60 DEG C in sealing reactor under the conditions of carry out cross-linked polymeric
Reaction 5h, then cools down, and filters, and deionized water rinses solid formation twice, after filtration is drained, is dried under vacuum to constant weight, obtains final product.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510131422.7A CN104839198B (en) | 2015-03-20 | 2015-03-20 | Thermosensitive pesticide slow release agent for preventing and treating carposina niponensis walshingham |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510131422.7A CN104839198B (en) | 2015-03-20 | 2015-03-20 | Thermosensitive pesticide slow release agent for preventing and treating carposina niponensis walshingham |
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| CN104839198B true CN104839198B (en) | 2017-05-10 |
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| CN108887286A (en) * | 2018-07-26 | 2018-11-27 | 四川壹丰生物科技有限公司 | A kind of agricultural chemical composition and application thereof |
| CN108835111A (en) * | 2018-07-30 | 2018-11-20 | 江苏常丰农化有限公司 | A kind of preparation method of 2,4-D hydrogel |
| CN109845766A (en) * | 2019-03-18 | 2019-06-07 | 海南博士威农用化学有限公司 | The suspending agent and preparation method and application for preventing and treating Tirathaba Rufivena On Areca Palms and Brontispa longissima |
| CN114105703A (en) * | 2021-12-17 | 2022-03-01 | 宁波大学 | Slow-release antibacterial amino acid water-soluble fertilizer and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AU5061899A (en) * | 1998-07-21 | 2000-02-14 | Alpenstock Holdings Limited | Anti-ulcer composition |
| US6121375A (en) * | 1999-02-11 | 2000-09-19 | Hydromer, Inc. | Gels formed by the interaction of poly(aldehyde) with various substances |
| CN101177488B (en) * | 2007-10-26 | 2010-05-19 | 广东工业大学 | Preparation of rapid swelling aquogel |
| CN101438701B (en) * | 2008-12-12 | 2011-08-17 | 山西省农业科学院植物保护研究所 | Film-forming agent for seed-coating containing polyvinyl alcohol and oxidized starch-acrylamide copolymer |
| CN101654521B (en) * | 2009-06-26 | 2011-07-20 | 上海大学 | Method for preparing copolymeric hydrogel containing maleylation chitosan structure by electron beam irradiation |
| CN102784112B (en) * | 2011-05-19 | 2014-08-06 | 东华理工大学 | Preparation method for porous slow-release microsphere of chitosan graft copolymer |
| CN103004757B (en) * | 2012-12-25 | 2014-04-16 | 山东大学 | Porous temperature-sensitive hydrogel slow release formulation and preparation method thereof |
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| WO2021101445A1 (en) * | 2019-11-18 | 2021-05-27 | Hydroemission Corporation Pte. Ltd. | Controlled release trunk implant formulation and trunk implant comprising the same |
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