CN105036567A - Preparing method for modified starch in glass fiber impregnating compounds - Google Patents
Preparing method for modified starch in glass fiber impregnating compounds Download PDFInfo
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Abstract
The invention discloses a preparing method for modified starch in glass fiber impregnating compounds. The preparing method includes the steps that starch is thrown into a reaction container, water is added, expansive retarders are added, and the pH is adjusted to 10 to 12 in the stirring state; base catalysts are added, then etherifying agents are added, the reaction is carried out at the temperature of 40 DEG C to 45 DEG C for 10 hours to 16 hours, and the pH is adjusted to 4 to 5 after the reaction is completed; after the temperature of the mixture is reduced to the indoor temperature, suction filtration is carried out, and solid substances are dried to obtain cationic starch; the cationic starch and amylase are evenly mixed according to the mass ratio of 1:1 to 1:2, and the modified starch product used for the glass fiber impregnating compounds is obtained. The product prepared with the preparing method has the good film forming performance, films are high in strength and good in elasticity, the impregnating compounds can be evenly distributed on fibers, the aptitude that the impregnating compounds migrate and the aptitude that the impregnating compounds form gel are reduced, the effects of improving the dryness of the films and protecting the fibers are achieved, and the remarkable cost advantage and the remarkable technology advantage are achieved.
Description
Technical field
The present invention relates to glass fiber yarn technical field, particularly relate to a kind of for modified starch and preparation method thereof in glass fiber treating compound.
Background technology
Glass fibre is a kind of reinforced inorganic material, has the excellent specific properties such as intensity is high, moisture absorption is low, corrosion-resistant, proportion is little, electrical insulating property is good, is widely used in building, traffic, electronics, aerospace, the field such as derived energy chemical and national defence.The use for the treatment of compound can increase the intensity of glass fibre, and boundling monofilament lubricates and protects fiber surface not suffer damage.Starch-type treating compound has advantages of nontoxic raw materials evil, aftertreatment is simple, cleaning is easy, the pure white clean and tidy advantage of low, after treatment the cloth cover of decomposition temperature.
Cationic starch can be divided into etherificate type, esterification type and graft copolymerization according to chemical bond types between starch and cation group, wherein etherificate type cationic starch is that hydroxyl in starch molecule and cationic etherifying agent are combined into by etherification reaction, the chemical bond of etherificate type cationic starch is stablized, comparatively graft copolymerization cationic starch synthesis technique is simple again, so up to the present of greatest concern.
But in current treating compound, modified starch is all adopt high-amylose maize starch to be raw material, and raw materials cost is high, and prior art adopts oxidation etherificate or crosslinked etherificate complex denaturation, and complex process, production cost improves further.Modified starch, as membrane-forming agent, is one of main component of glass fiber treating compound, has dominated the cost of glass fiber treating compound, and therefore, find functional, cheap modified starch membrane-forming agent is the direction that glass-fiber industry is made great efforts always.
Summary of the invention
In order to overcome the shortcoming of prior art, the object of the present invention is to provide a kind of preparation method for modified starch in glass fiber treating compound, in glass fiber treating compound, this modified starch film toughness is high, good springiness, makes treating compound be evenly distributed, and can reduce treating compound migratory aptitude and form gel tendency, improve film drying, reduce fiber breakage.
Object of the present invention is achieved through the following technical solutions:
For a preparation method for the modified starch of glass fiber treating compound, comprise the following steps:
(1) by starch use water furnishing starch milk, in described starch milk, swelling inhibitor is added;
(2) be 10 ~ 12 by the pH value of NaOH solution regulating step (1) gained starch milk, add the alkaline catalysts being equivalent to starch quality 5% ~ 10%, add the etherifying agent being equivalent to starch quality 5% ~ 10% again, stirring reaction at 40 ~ 45 DEG C of temperature, and then add hydrochloric acid adjustment pH value of starch milk to 4 ~ 5, terminate reaction, obtain reacted starch milk;
(3) described for step (2) reacted starch milk ethanol is carried out taking out washing, then use distilled water wash, then washing gains be dry, pulverize, sieve, obtain cationic starch;
(4) step (3) gained cationic starch is mixed according to 1:1 ~ 1:2 mass ratio with amylose starch, obtain the described modified starch for glass fiber treating compound;
Described swelling inhibitor is that sodium sulfate is or/and sodium-chlor;
Described alkaline catalysts is that sodium hydroxide is or/and calcium hydroxide;
Described etherifying agent be 3 ?Lv ?2 ?hydroxypropyltrimonium muriate (hereinafter referred to as CHPTMA) or N ?(2,3 ?epoxypropyl) trimethyl ammonium chloride (hereinafter referred to as GTA).
For realizing the object of the invention further, preferably, the add-on of described swelling inhibitor is starch quality 5% ~ 10%.
Preferably, the time of described stirring reaction is 10 ~ 16 hours.
Preferably, step (1) described starch is one or more in maize amylose, W-Gum, waxy corn starch, Starch rice, Waxy Rice Starch, yam starch, tapioca (flour), sweet potato starch, green starch and pea starch.
Preferably, the massfraction of step (1) described starch milk is 35% ~ 45%.
Preferably, described amylose starch is the maize amylose of amylose content scope 50% ~ 70%.
Preferably, the concentration of described NaOH solution is 0.1 ~ 1mol/L; Described concentration of hydrochloric acid is 0.1 ~ 1mol/L.
Preferably, the massfraction 95% of described ethanol; It is 4 ~ 5 times that step (3) described ethanol carries out taking out the number of times washed; The number of times of step (3) described distilled water wash is 2 ~ 3 times; Described drying is dried in 45 ~ 55 DEG C of air dry ovens; The described sieve aperture sieved is 100 orders
Preferably, described etherifying agent 3 ?Lv ?2 ?the muriatic preparation method of hydroxypropyltrimonium be: general etc. moles of epichlorohydrin and Trimethylamine 99 or the trimethylamine hydrochloride aqueous solution react obtained in 25 ~ 60 DEG C;
Described etherifying agent N ?the preparation method of (2,3 ?epoxypropyl) trimethyl ammonium chloride be: general etc. moles of epichlorohydrin or 3 ?propenyl chloride and Trimethylamine 99 react obtained in 25 ~ 60 DEG C.
For a modified starch for glass fiber treating compound, obtained by above-mentioned preparation method.
Above-mentioned cooling, drying, pulverizing etc. are all the current techiques in current food processing field.
Described modified starch is free from extraneous odour, no-sundries, fine and smooth white powder.
GTA and CHPTMA can transform rapidly mutually under different pH conditions.
Existing starch investigative technique personnel, for the application of starch material, if need starch conversion, have developed multiple method of modifying, have had many-sided application in practice.But this application is all direct applying modified starch, and by unmodified starch with treated starch is used in combination not yet finds, possible existing technical staff thinks such and used in combinationly generation to be influenced each other.And the present inventor finds, by modified starch product and ative starch used in combination, there is because high amylose starch is natural excellent film-forming properties, snappiness, tensile strength and water-insoluble, etherificate type cationic starch has good film-forming properties, viscosity stability, to advantages such as the avidities of fiber, the mixture of cationic starch and amylose starch is used to form modified starch product, as starch-type glass fiber treating compound main component, both advantages can be had concurrently, this modified starch film toughness is high, good springiness, treating compound is evenly distributed, and treating compound migratory aptitude can be reduced and form gel tendency, improve film drying, reduce fiber breakage, be highly suitable in glass fiber treating compound, and due to cation modified starch raw material be common starch, advantage of lower cost, effectively overcome the deficiency of the modified starch adopting composite modified (crosslinked etherificate or oxidation etherificate) method to obtain and the high problem of production cost.
The present invention has following advantage and effect relative to prior art:
1) mixed-cation treated starch of the present invention and amylose starch overcome the deficiency of ative starch and single modified starch, for in glass fiber treating compound, this modified starch film toughness is high, good springiness, treating compound is evenly distributed, and treating compound migratory aptitude can be reduced and form gel tendency, improve film drying, reduce fiber breakage.
2) the present invention adopts cationic modified starch and amylose starch to be mixed with the method for modified starch, prepares a kind of for the modified starch in glass fiber treating compound.Wherein, the key of cationic starch practicality is the affinity for band anionic charge material, and other compositions in treating compound are easily combined closely with it, and treating compound is evenly distributed; The ash content of cationic starch is low compared with other modified starches, and the wear resistance of film is better, and the performance of protection glass is stronger, flies the less or nothing of silk;
3) amylose starch has excellent film-forming properties and gelling characteristics, and the existence of its gel property can stop the migration for the treatment of compound, but amylose starch is water-soluble poor, and soltion viscosity is higher, can reduce the processing performance for the treatment of compound, causes glass fibre yarn to fluff;
Embodiment
For understanding the present invention better, below in conjunction with embodiment, the invention will be further described, but embodiments of the present invention are not limited thereto.
Embodiment 1
A kind of for modified starch in glass fiber treating compound, be obtained by mixing by cationic starch and amylose starch, its preparation method is as follows:
(1) be the starch milk of 35% by W-Gum distilled water furnishing mass concentration, in described starch milk, add the sodium sulfate being equivalent to starch quality 5%;
(2) be 10.0 with the pH of NaOH solution regulating step (1) the gained starch milk of 1mol/L, add the alkaline catalysts NaOH being equivalent to starch quality 5%, add the etherifying agent CHPTMA being equivalent to starch quality 8% again, stirring reaction 10 hours at 40 DEG C of temperature, and then the HCl solution adding 1mol/L regulates starch milk pH to 4.0, terminate reaction, obtain reacted starch milk;
(3) described for step (2) reacted starch milk ethanol is carried out taking out wash 4 times, then use distilled water wash 2 times, then washing gains are dried in 45 DEG C of air dry ovens, pulverize, cross 100 mesh standard sieves, obtain cationic starch;
(4) step (3) gained cationic starch and the amylose starch maize amylose of 50% (amylose starch to be amylose content be) are mixed according to the mass ratio of 1:1, be the described modified starch for glass fiber treating compound.
(5) prepare by prior art mode and use treating compound: modified starch product obtained for embodiment 1 is mixed with deionized water, be mixed with the solution that mass percentage is 5%, solution is heated to 90 DEG C, constant temperature 30min gelatinization, temperature-rise period should not too soon (heat-up rate controls at 1.5 ~ 3.0 DEG C/min).After gelatinization completes, then adding appropriate warm water, to adjust the temperature to 75 DEG C (becoming starch paste) stand-by.
Conventionally recipe requirements, take auxiliary agent NBL ?e ?201, SofbonGF ?1, L ?44, NewlonGF ?101, NewlonGF ?100 in emulsification container, be heated to 80 DEG C, by auxiliary agent GW ?18 be dissolved into separately more than the 80 DEG C aqueous solution.Use 5000r/min high-speed shearing machine (being the general whipping appts of prior art) under high velocity agitation, add gradually in emulsification container GW ?18 aqueous solution.When phase inversion point, material becomes sticky thick in paste, continues interpolation more than 80 DEG C hot water, makes it to be transformed into stable O/w emulsion.About 4 minutes high shear agitation time.The O/w emulsion that emulsification is good is added in the starch paste of 75 DEG C.Take recipe requirements auxiliary agent NBL ?70, be dissolved in 80 DEG C of hot water, add in starch paste.With about 70 DEG C hot water quantitatively to the treating compound total amount of required preparation.Obtained treating compound is used for glass fiber wire-drawing process, and surveys performance, the results are shown in Table 3 and table 4.
Embodiment 2
A kind of for modified starch in glass fiber treating compound, be obtained by mixing by cationic starch and amylose starch, its preparation method is as follows:
(1) be the starch milk of 40% by pea starch distilled water furnishing mass concentration, in described starch milk, add the sodium sulfate being equivalent to starch quality 5%;
(2) be 12.0 with the pH of NaOH solution regulating step (1) the gained starch milk of 1mol/L, add the alkaline catalysts NaOH being equivalent to starch quality 5%, add the etherifying agent CHPTMA being equivalent to starch quality 10% again, stirring reaction 16 hours at 45 DEG C of temperature, and then the HCl solution adding 1mol/L regulates starch milk pH to 5.0, terminate reaction, obtain reacted starch milk;
(3) described for step (2) reacted starch milk ethanol is carried out taking out wash 4 times, then use distilled water wash 2 times, then washing gains are dried in 45 DEG C of air dry ovens, pulverize, cross 100 mesh standard sieves, obtain cationic starch;
(4) step (3) gained cationic starch and the amylose starch maize amylose of 60% (amylose starch to be amylose content be) are mixed according to the mass ratio of 1:1.5, be the described modified starch for glass fiber treating compound.
(5) prepare by prior art mode and use treating compound: modified starch product obtained for embodiment 2 is mixed with deionized water, be mixed with the solution that mass percentage is 5%, solution is heated to 90 DEG C, constant temperature 30min gelatinization, temperature-rise period should not too soon (see embodiment 1).After gelatinization completes, then adding appropriate warm water, to adjust the temperature to about 75 DEG C (becoming starch paste) stand-by.
Conventionally recipe requirements, take auxiliary agent NBL ?e ?201, SofbonGF ?1, L ?44, NewlonGF ?101, NewlonGF ?100 in emulsification container, be heated to 80 DEG C, by auxiliary agent GW ?18 be dissolved into separately more than the 80 DEG C aqueous solution.Use 5000r/min high-speed shearing machine (being a kind of whipping appts of the prior art), in emulsification container, add gradually under high-speed stirring GW ?18 aqueous solution.When phase inversion point, material becomes sticky thick in paste, continues interpolation more than 80 DEG C hot water, makes it to be transformed into stable O/w emulsion.About 4 minutes high shear agitation time.The O/w emulsion that emulsification is good is joined in the starch paste of 75 DEG C.Take recipe requirements auxiliary agent NBL ?70, be dissolved in 80 DEG C of hot water, add in starch paste.With 70 DEG C of hot water quantitatively to the treating compound total amount of required preparation.Obtained treating compound is applied to conventional glass fiber wire-drawing technique one to twist thread the performance of production technique, the ORGANDY obtained by mensuration, the results are shown in Table 3 and table 4.
During preparation treating compound, the addition scope of auxiliary agent is with reference to table 1:
The addition of auxiliary agent when 100kg treating compound prepared by table 1
In embodiment 1 and 2, the concrete addition of auxiliary agent is with reference to table 2:
The addition of auxiliary agent during 100kg treating compound is prepared in table 2 example 1 and example 2
The performance test methods of modified starch product:
(1) viscosity: according to GB/T22427.7 ?2008, adopt BrookfieldDV ?2 rotary viscometers carry out viscosity test.
(2) surface tension: according to GB/T22237 ?2008, surface tension test is carried out to modified starch product.
(3) contact angle: according to GB/T30447 ?2013, adopt contact angle instrument carry out contact angle test.
(4) adhesive tension: adopt pull method to carry out adhesive tension test.
Wire-drawing performance testing method:
(1) precursor convergency: convergency refers to that in drawing process, glass fiber single filament, after coating treating compound, is bonded to bonding degree during glass fiber precursor mutually.Its evaluation method is: get 100 chopped strands at random, then observes fracture monofilament degree with magnifying glass, divides three grades.1 point: not bifurcated; 2 points: 1 ?2 forks (containing 2 forks); 3 points: 3 forks above (containing 3 forks).The average convergency P=of yarn sample (a × 1+b × 2+c × 3)/100.Wherein a, b, c are respectively the quantity of each grade chopped strand; P is the average convergency of yarn sample, and value is more close to 1, and its convergency is better.
(2) precursor stiffness: the degree that woven glass roving fabric or precursor are endured with all one's will.With specified length when center hangs, under point of tangent, the hang down spacing at two ends of certain distance measurement represents.Perform by the regulation of ISO3375-L975.
(3) disconnected hair flies silk: by the visual inspection to glass fiber single filament, whether has disconnected hair and flies a situation.
(4) tensile strength: adopt tensile strength test machine to test.
(5) size content: perform by the regulation of GB11175.
The modified starch product of embodiment 1 and 2 compares in table 3 with existing industrial application starch product, treating compound the performance test results.
The modified starch product that table 3 embodiment 1 and 2 obtains compares with the performance perameter of existing industrial application starch product
The wire-drawing performance of the treating compound that table 4 embodiment 1 and 2 is obtained and the performance perameter comparative result of the made treating compound of existing industrial application starch product are in table 4.
Table 4
From table 3 and table 4, embodiment 1 and 2 all reaches existing industrial starch product performance index, meets glass fiber treating compound performance requriements.But the embodiment of the present invention 1 and embodiment 2 mix two kinds of starch, overcome the deficiency of ative starch and single modified starch, for in glass fiber treating compound, this modified starch film toughness is high, good springiness, makes treating compound be evenly distributed, and can reduce treating compound migratory aptitude and form gel tendency, improve film drying, reduce fiber breakage.And prior art generally adopts composite modified (crosslinked etherificate or oxidation etherificate) method, the present invention adopts single modification and physical mixed, and technique is relatively simple, easily controls; Modified starch, as membrane-forming agent, is one of main component of glass fiber treating compound, has dominated the cost of glass fiber treating compound, and therefore, find functional, cheap modified starch membrane-forming agent is the direction that glass-fiber industry is made great efforts always.Prior art generally adopts amylomaize to be raw material, and subject cationic modified starch raw material is common starch, advantage of lower cost; The performance of modified starch of the present invention meets or exceeds prior art, and production technique is simple simultaneously, and cost is lower, has significant cost and process advantage.
Embodiment 3
A kind of for modified starch in glass fiber treating compound, be obtained by mixing by cationic starch and amylose starch, its preparation method is as follows:
(1) be the starch milk of 45% by Starch rice distilled water furnishing mass content, in described starch milk, add the sodium sulfate being equivalent to starch quality 5%;
(2) be 12.0 with the pH of NaOH solution regulating step (1) the gained starch milk of 1mol/L, add the alkaline catalysts NaOH being equivalent to starch quality 10%, add the etherifying agent GTA being equivalent to starch quality 10% again, stirring reaction 12 hours at 45 DEG C of temperature, and then the HCl solution adding 1mol/L regulates starch milk pH to 5.0, terminate reaction, obtain reacted starch milk;
(3) described for step (2) reacted starch milk ethanol is carried out taking out wash 4 times, then use distilled water wash 2 times, then washing gains are dried in 45 DEG C of air dry ovens, pulverize, cross 100 mesh standard sieves, obtain cationic starch; (4) step (3) gained cationic starch and the amylose starch maize amylose of about 70% (amylose starch to be amylose content be) are mixed according to the ratio of 1:1.2, be the described modified starch for glass fiber treating compound.
Embodiment 4
A kind of for modified starch in glass fiber treating compound, be obtained by mixing by cationic starch and amylose starch, its preparation method is as follows:
(1) be the starch milk of 40% by yam starch distilled water furnishing mass concentration, in described starch milk, add the sodium sulfate being equivalent to starch quality 5%;
(2) be 11.0 with the pH of NaOH solution regulating step (1) the gained starch milk of 1mol/L, add the alkaline catalysts NaOH being equivalent to starch quality 6%, add the etherifying agent GTA being equivalent to starch quality 5% again, stirring reaction 12 hours at 45 DEG C of temperature, and then the HCl solution adding 1mol/L regulates starch milk pH to 5.0, terminate reaction, obtain reacted starch milk;
(3) described for step (2) reacted starch milk ethanol is carried out taking out wash 4 times, then use distilled water wash 2 times, then washing gains are dried in 45 DEG C of air dry ovens, pulverize, cross 100 mesh standard sieves, obtain cationic starch; (4) step (3) gained cationic starch and the amylose starch maize amylose of about 50% (amylose starch to be amylose content be) are mixed according to the ratio of 1:1, be the described modified starch for glass fiber treating compound.
Embodiment 5
A kind of for modified starch in glass fiber treating compound, be obtained by mixing by cationic starch and amylose starch, its preparation method is as follows:
(1) be the starch milk of 38% by tapioca (flour) distilled water furnishing mass concentration, in described starch milk, add the sodium sulfate being equivalent to starch quality 5%;
(2) be 10.0 with the pH of NaOH solution regulating step (1) the gained starch milk of 1mol/L, add the alkaline catalysts NaOH being equivalent to starch quality 5%, add the etherifying agent GTA being equivalent to starch quality 10% again, stirring reaction 16 hours at 45 DEG C of temperature, and then the HCl solution adding 1mol/L regulates starch milk pH to 5.0, terminate reaction, obtain reacted starch milk;
(3) described for step (2) reacted starch milk ethanol is carried out taking out wash 4 times, then use distilled water wash 2 times, then washing gains are dried in 45 DEG C of air dry ovens, pulverize, cross 100 mesh standard sieves, obtain cationic starch;
(4) step (3) gained cationic starch and the amylose starch maize amylose of 60% (amylose starch to be amylose content be) are mixed according to the ratio of 1:1.5, be the described modified starch for glass fiber treating compound.
Embodiment 6 ~ 10
A kind of for modified starch in glass fiber treating compound, be obtained by mixing by cationic starch and amylose starch, its preparation method is as follows:
(1) be 35% ~ 45% starch milk by starch water furnishing mass concentration, in described starch milk, add the swelling inhibitor being equivalent to starch quality 5% ~ 10%;
(2) be 10 ~ 12 with the pH of NaOH solution regulating step (1) gained starch milk, add the alkaline catalysts being equivalent to starch quality 5% ~ 10%, add the etherifying agent being equivalent to starch quality 5% ~ 10% again, stirring reaction 10 ~ 16 hours at 40 ~ 45 DEG C of temperature, and then add hydrochloric acid adjustment starch milk pH to 4 ~ 5, terminate reaction, obtain reacted starch milk;
(3) described for step (2) reacted starch milk ethanol is carried out taking out washing, then use distilled water wash, then washing gains are dried in 45 ~ 55 DEG C of air dry ovens, pulverize, cross 100 mesh standard sieves, obtain cationic starch;
(4) by step (3) gained cationic starch and the amylose starch maize amylose of 70% (amylose starch to be amylose content be) according to a certain percentage (see table 4) mix, be the described modified starch for glass fiber treating compound;
In each embodiment, the concrete consumption of each component (%) is in table 4:
Each component and consumption (%) thereof in table 4 embodiment 6 ~ 12
In above-mentioned above-described embodiment: described NBL ?e ?201, SofbonGF ?1, L ?44, NewlonGF ?101, NewlonGF ?100, GW ?18, NBL ?the 70 existing commercially available prod being the production and sales of Japanese NBL KCC.
Embodiment 3 ?10 treating compound similar to the performance of embodiment 1,2, all reach the requirement of glass properties.
When the modified starch product that content of the present invention and above-described embodiment obtain is applied in glass fiber wire drawing technique as treating compound, obtained modified starch product and water and (multiple) organic additive (existing commercially available prod) can be mixed, are made into the treating compound of the form of emulsion, be coated to fiberglass surfacing, the consumption of the modified starch product that the present invention obtains in treating compound can be 3 ~ 8% for the treatment of compound total formula weight.
Described raw material in content of the present invention and above-described embodiment is existing marketable material, and the ratio of feed composition is mass ratio; In the percentage adopted, do not indicate especially, be percent mass ratio.
In above-described embodiment: the processing parameter (temperature, time, concentration etc.) in each step and each amounts of components numerical value etc. are scope, and any point is all applicable.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from spirit of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1., for a preparation method for the modified starch of glass fiber treating compound, it is characterized in that comprising the following steps:
(1) by starch use water furnishing starch milk, in described starch milk, swelling inhibitor is added;
(2) be 10 ~ 12 by the pH value of NaOH solution regulating step (1) gained starch milk, add the alkaline catalysts being equivalent to starch quality 5% ~ 10%, add the etherifying agent being equivalent to starch quality 5% ~ 10% again, stirring reaction at 40 ~ 45 DEG C of temperature, and then add hydrochloric acid adjustment pH value of starch milk to 4 ~ 5, terminate reaction, obtain reacted starch milk;
(3) described for step (2) reacted starch milk ethanol is carried out taking out washing, then use distilled water wash, then washing gains be dry, pulverize, sieve, obtain cationic starch;
(4) step (3) gained cationic starch is mixed according to 1:1 ~ 1:2 mass ratio with amylose starch, obtain the described modified starch for glass fiber treating compound;
Described swelling inhibitor is sodium sulfate and/or sodium-chlor;
Described alkaline catalysts is sodium hydroxide and/or calcium hydroxide;
Described etherifying agent be 3 ?Lv ?2 ?hydroxypropyltrimonium muriate or N ?(2,3 ?epoxypropyl) trimethyl ammonium chloride.
2. the preparation method of the modified starch for glass fiber treating compound according to claim 1, is characterized in that, the add-on of described swelling inhibitor is starch quality 5% ~ 10%.
3. the preparation method of the modified starch for glass fiber treating compound according to claim 1, is characterized in that, the time of described stirring reaction is 10 ~ 16 hours.
4. the preparation method of the modified starch for glass fiber treating compound according to claim 1, it is characterized in that, step (1) described starch is one or more in maize amylose, W-Gum, waxy corn starch, Starch rice, Waxy Rice Starch, yam starch, tapioca (flour), sweet potato starch, green starch and pea starch.
5. the preparation method of the modified starch for glass fiber treating compound according to claim 1, is characterized in that, the massfraction of step (1) described starch milk is 35% ~ 45%.
6. the preparation method of the modified starch for glass fiber treating compound according to claim 1, is characterized in that, described amylose starch is the maize amylose of amylose content scope 50% ~ 70%.
7. the preparation method of the modified starch for glass fiber treating compound according to claim 1, is characterized in that, the concentration of described NaOH solution is 0.1 ~ 1mol/L; Described concentration of hydrochloric acid is 0.1 ~ 1mol/L.
8. the preparation method of the modified starch for glass fiber treating compound according to claim 1, is characterized in that, the massfraction 95% of described ethanol; It is 4 ~ 5 times that step (3) described ethanol carries out taking out the number of times washed; The number of times of step (3) described distilled water wash is 2 ~ 3 times; Described drying is dried in 45 ~ 55 DEG C of air dry ovens; The described sieve aperture sieved is 100 orders
9. the preparation method of the modified starch for glass fiber treating compound according to claim 1, it is characterized in that, described etherifying agent 3 ?Lv ?2 ?the muriatic preparation method of hydroxypropyltrimonium be: general etc. moles of epichlorohydrin and Trimethylamine 99 or the trimethylamine hydrochloride aqueous solution react obtained in 25 ~ 60 DEG C;
Described etherifying agent N ?the preparation method of (2,3 ?epoxypropyl) trimethyl ammonium chloride be: general etc. moles of epichlorohydrin or 3 ?propenyl chloride and Trimethylamine 99 react obtained in 25 ~ 60 DEG C.
10. for a modified starch for glass fiber treating compound, it is characterized in that, it is obtained by the preparation method described in any one of claim 1 ~ 9.
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| CN111072791A (en) * | 2019-12-27 | 2020-04-28 | 河南新孚望新材料科技有限公司 | Preparation method of high amylose starch for coating agent |
| CN111977990A (en) * | 2020-09-08 | 2020-11-24 | 清远忠信电子材料有限公司 | High-performance impregnating compound for superfine electronic yarn and preparation method thereof |
| WO2021057372A1 (en) * | 2019-09-25 | 2021-04-01 | 广东格瑞新材料股份有限公司 | High-rigidity nylon composite material and preparation method therefor |
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| WO2021057372A1 (en) * | 2019-09-25 | 2021-04-01 | 广东格瑞新材料股份有限公司 | High-rigidity nylon composite material and preparation method therefor |
| CN111072791A (en) * | 2019-12-27 | 2020-04-28 | 河南新孚望新材料科技有限公司 | Preparation method of high amylose starch for coating agent |
| CN111977990A (en) * | 2020-09-08 | 2020-11-24 | 清远忠信电子材料有限公司 | High-performance impregnating compound for superfine electronic yarn and preparation method thereof |
| CN111977990B (en) * | 2020-09-08 | 2021-02-09 | 清远忠信电子材料有限公司 | High-performance impregnating compound for superfine electronic yarn and preparation method thereof |
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