CN1039232C - Dodecene modifier starch and its preparing method - Google Patents
Dodecene modifier starch and its preparing method Download PDFInfo
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- CN1039232C CN1039232C CN94115807A CN94115807A CN1039232C CN 1039232 C CN1039232 C CN 1039232C CN 94115807 A CN94115807 A CN 94115807A CN 94115807 A CN94115807 A CN 94115807A CN 1039232 C CN1039232 C CN 1039232C
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- succinic anhydried
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Abstract
The present invention provides a dodecylene modified starch, and the general formula is shown in the upper figure. The present invention uses dodecylene starch as filling starch to keep the biodegradability and enhance the bonding force with polyethylene, and thereby, the mechanical performance of a starch polyethylene film is increased. The product can be used as the starch for filling plastic and can be used for a plurality of industries, such as slurry spread in the textile industry, glue spread in paper-making industry, medicine chemical industry, etc.
Description
The invention belongs to starch, particularly a kind of chemically modified starch.
Starch has a purposes widely industrial, as on paper-making industry as sizing agent, in polymer industry, be used as ground film additive or the like.Along with the develop rapidly of macromolecular material industry, the synthetic macromolecular compound that more and more is difficult to degrade is abandoned in the natural material cycle.This not perishable environmental pollution that is caused with " specific refuse " of burning has become serious social effects of pollution.According to the statistics made by the departments concerned, soil compaction, the soil property that causes owing to the accumulation of indissoluble discarded mulch film degenerates to offset and uses the economic benefit that mulch film brought.For this reason, exploitation degradable polymer material has become heat subject in recent years.So-called Devlopment of Degradable Plastics is comparatively sophisticated at present to be to add starch or modification starch and other auxiliary agent to make in ordinary resin.Filling has the numerous species type with starch, as ative starch, physical modification starch or chemically modified starch etc.Chemically modified starch also has many kinds, as denaturated starch by acid, dialdehyde starch, hypochlorite oxidation starch, cross-linking starch or the like.These starch have characteristics separately, but shortcoming are can not reach with polyethylene consistency and free-flowing property are preferably arranged after handling through certain modification.In addition, at present glue used in paper-making mostly adopts Sumstar 190, tapioca (flour), and it is all not ideal enough to use paper strength and water tolerance that above-mentioned sizing agent produces.
The object of the present invention is to provide a kind of and resin to have consistency and free-flowing property preferably and can improve the preparation method that the laurylene Succinic anhydried of paper quality is modified starch.
Laurylene Succinic anhydried of the present invention is modified starch, and its general formula is:
Its physicals is: product appearance is tenderly white toner end, and feel is smooth, fine and smooth, moisture 2-15%, ash content 0.35-0.6%, 0.05mm sieve transmitance 98-99.6%, pH value 6.0-7.5.
Above-mentioned laurylene Succinic anhydried is modified the preparation method of starch, carries out as follows:
(a). with starch and water with 1: the ratio preparation starch solution of 1.2-1.5 (weight ratio), control its temperature and be not higher than 50 ℃, stir,
(b). slowly add (weight percent) laurylene Succinic anhydried that accounts for amount of starch 2-2.5%, stir,
(c). add the alkaline solution of (weight percent) that account for amount of starch 0.2-0.5%, make the pH value of reaction system be controlled at alkaline range 8.0-10.0, reacted 2-4 hour,
(d). dewater, dry, sieve, get finished product.
Ative starch of the present invention can be W-Gum or potato starch.
Laurylene Succinic anhydried of the present invention is modified among the preparation method of starch, and the alkali that is used to adjust system pH can be NaOH.The prepared laurylene Succinic anhydried of aforesaid method is modified starch and be can be used as glue used in paper-making.
In order to increase the flowability of starch, can in reaction system, add Tai-Ace S 150.In the method for the invention, after c step, can increase by a step again and promptly slowly add (weight percent) alum liquor that accounts for amount of starch 1-5%, and to adjust pH value with alkali be 6.5-7.5, and then dehydration, oven dry, filtration, product got.Modify starch by the prepared laurylene Succinic anhydried of aforesaid method and have fabulous free-flowing property, can be used as the resin filled with starch.
The present invention is raw materials used to be commercially available, and all can adopt technical grade.
The present invention is directed to existing shortcoming of filling, succeeded in developing the laurylene Succinic anhydried and modified starch with modified starch.It is on the grape unit of starch that the laurylene Succinic anhydried is modified starch, with laurylene group part substituted hydroxy.Because the laurylene Succinic anhydried is a hydrophobicity long-chain shape group, to the PE resin similar structure is arranged, its introducing strengthens the consistency of starch and resin as set up one " bridge " between starch and resin greatly.Therefore, as filled with starch, both kept its biological degradability, increased again and poly bonding force, thereby improved the mechanical property of starch polyethylene film with laurylene Succinic anhydried starch.And the good free-flowing property that it possessed, having overcome in the blown film process deposition on the filtering net again is detained drawback, makes that the technical barrier that serialization is produced in the film-blowing process is solved.This product not only can be used as the plastics filling and uses starch, and can be used for many industries such as textile sizing, paper-making sizing, medication chemistry.Particularly in the application of paper-making industry, the laurylene Succinic anhydried is modified starch as paper internal sizing agent and Surface Size, compares with Sumstar 190, tapioca (flour), can increase substantially strength of paper and water tolerance, is a kind of good new type of paper sizing agent.
Embodiment 1
In the 3KL reactor, add 1500L water, the control temperature of reaction system is about 40 ℃, when stirring, add after 1 ton of starch stirs well, slowly add 20L laurylene Succinic anhydried, stir half an hour, it is uniformly dispersed, adds 2.0%NaOH solution continuously, the pH value of reaction system is controlled at about 8.0, after reacting about 3 hours, slowly add 3%Al
2(SO
4)
3150L stirs half an hour, and adjusting pH value of reaction system with NaOH is 6.5-7.5, with whizzer starch is dewatered, and makes the starch drying by drying plant again, crosses the 0.05mm sieve, is finished product after the packing.This product appearance is a white powder, and feel is smooth, fine and smooth, no moisture absorption caking phenomenon.After measured: water content 1.8%, ash content＜0.45%, 0.05mm sieve transmitance is not less than 99.0%, pH value 7.0, repose angle α is 19 °.This product can be used as the filled with starch of resin.
In the above-described embodiments, the mensuration of physical index repose angle α is such: with the starch sample of 10 gram oven dry, slowly flow into one and have the funnel of certain altitude with smooth glass, because the free-flowing property of starch, just can make the starch of stream on sheet glass form a starch cone, the high h and the radius r calculating of measuring cone with ruler can draw the α angle.Measurement result is got 11 times mean value.
Embodiment 2
In the 3KL reactor, add 1500L water, the control temperature of reaction system is about 40 ℃, when stirring, add after 1 ton of starch stirs well, slowly add 20L laurylene Succinic anhydried, stir half an hour, it is uniformly dispersed, add 2.0%NaOH solution continuously, the pH value of reaction system is controlled at about 8.0, after reacting about 3 hours, adjusting the pH value with rare Hcl is 3.0, keeps 2 hours in this acid system, adjusting system pH with NaOH again is 6.5-7.5, dehydrate then, cross the 0.149mm sieve, be finished product after the packing.This product is a white powder, moisture content 10.9%, and ash＜0.45%, the pH value is 7.0, viscosity is 2.4 * 10
-2Pa.t (5% sticks with paste liquid).This product is as paper internal sizing agent and Surface Size, raising strength of paper and water tolerance that can be by a relatively large margin.
Claims (4)
1. a laurylene Succinic anhydried is modified the preparation method of starch, carries out as follows:
(a) with starch and water with 1: the ratio preparation starch solution of 1.2-1.5 (weight ratio), control its temperature greater than 40 ℃, smaller or equal to 50 ℃, stir,
(b) slowly add the laurylene Succinic anhydried that accounts for amount of starch 2-2.5% (weight percent), stir,
(c) add the alkaline solution that accounts for amount of starch 0.2-0.5% (weight percent), make the pH value of reaction system be controlled at 8.0-10.0, reacted 2-4 hour,
(d) dewater, dry, sieve, get finished product.
2. the method for claim 1 is characterized in that said starch can be W-Gum or potato starch.
3. the method for claim 1 is characterized in that said alkali can be sodium hydroxide.
4. the method for claim 1 is characterized in that can increasing a step and promptly slowly add the alum liquor that accounts for amount of starch 1-5% (weight percent) in reactant after (c) step, and is 6.5-7.5 with alkaline solution adjustment system pH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94115807A CN1039232C (en) | 1994-08-18 | 1994-08-18 | Dodecene modifier starch and its preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94115807A CN1039232C (en) | 1994-08-18 | 1994-08-18 | Dodecene modifier starch and its preparing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1117052A CN1117052A (en) | 1996-02-21 |
| CN1039232C true CN1039232C (en) | 1998-07-22 |
Family
ID=5037639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94115807A Expired - Fee Related CN1039232C (en) | 1994-08-18 | 1994-08-18 | Dodecene modifier starch and its preparing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1039232C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880335B (en) * | 2010-02-03 | 2012-05-23 | 内蒙古奈伦农业科技股份有限公司 | Method for preparing modified starch by oxidation and succinic anhydride esterification |
| TWI434706B (en) | 2011-12-15 | 2014-04-21 | Ind Tech Res Inst | Enterosoluble and intestinal-enzyme-biodegradable materials and method for preparing the same |
| JP7032293B2 (en) * | 2018-12-21 | 2022-03-08 | 信越化学工業株式会社 | Method for Producing 4-Methyl-5-Nonanone and 4-Methyl-5-Nonanol |
| JP7190422B2 (en) | 2018-12-21 | 2022-12-15 | 信越化学工業株式会社 | Method for producing 4-methyl-5-nonanone and 4-methyl-5-nonanol |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2517097A (en) * | 1946-02-08 | 1950-08-01 | Rhodiaceta | Manufacture of cellulose esters |
| EP0204353A1 (en) * | 1985-05-08 | 1986-12-10 | Akzo N.V. | Process for the preparation of an ester from starch and a monocarboxylic acid, and a composition based on the starch ester thus prepared |
| EP0603837A1 (en) * | 1992-12-23 | 1994-06-29 | National Starch and Chemical Investment Holding Corporation | Method of preparing intermediate degree of substitution starch esters in aqueous solution |
-
1994
- 1994-08-18 CN CN94115807A patent/CN1039232C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2517097A (en) * | 1946-02-08 | 1950-08-01 | Rhodiaceta | Manufacture of cellulose esters |
| EP0204353A1 (en) * | 1985-05-08 | 1986-12-10 | Akzo N.V. | Process for the preparation of an ester from starch and a monocarboxylic acid, and a composition based on the starch ester thus prepared |
| EP0603837A1 (en) * | 1992-12-23 | 1994-06-29 | National Starch and Chemical Investment Holding Corporation | Method of preparing intermediate degree of substitution starch esters in aqueous solution |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1117052A (en) | 1996-02-21 |
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