CN100532308C - Organic-inorganic composition - Google Patents

Abstract

An inorganic-organic composite comprises an inorganic phase, such as gypsum crystals, and a film forming organic phase. The film forming organic phase is selected from substituted starches having a degree of polymerization; degree of substitution and viscosity such that the substituted starches are insoluble in water during mixing but dissolve at a higher processing temperature during forming, setting or drying of the composite. Thus, excessive migration of the substitute starch is prevented and the composite is substantially strengthened.

Description

Organic-inorganic composition

The related application of cross reference

The application require following before right of priority that submit to, common pendent U.S. Provisional Patent Application: the sequence number of submitting on August 20th, 2004 is that the sequence number submitted in 60/603491 application, on December 12nd, 2003 is that the sequence number submitted in 60/528559 application, on March 15th, 2004 is 60/553423 application, and with reference to quoting the disclosed content of described application.

Technical field

The field of the invention relates to the organic-inorganic composition that is used for low-cost flame-retardant building materials etc.

Background technology

Substituted starch is the starch derivative that replaces one or more hydroxyls by chemical reaction.Usually, this technology relates to carries out etherificate or esterification to starch or treated starch, has ether or ester bond on the starch polymer skeleton of described starch or treated starch.This technology is different from more conventional starch conversion such as oxidation, acid dilution, crosslinked and pre-gelledization.Described starch can derive from a kind of in many crude substance, such as potato, tapioca (flour) or corn.In fact, the starch of numerous species is known, and can buy with the form that comprises liquid, particle and fine powder.Utilizing before or after one or more functional groups replace, also can utilize other mode,, the starch that replaces is being carried out modification such as the acid dilution.For example, substituting group can be such as alkyl substituents such as methyl or ethyls, or such as hydroxyalkyl substituting groups such as hydroxyethyl, methylol or hydroxypropyl, hydrophobic grouping, positively charged ion, anionic group or their combination.In any case the method for preparing substituted starch is known.

Sometimes the starch of acid dilution or pre-gelledization is added in the wallboard core prescription, purpose is to improve combining of wallboard core and paper.These starch migrate to the surface usually or are applied directly to the surface of wallboard core.In the wallboard of routine, paper can withstand most stress, and the reliable connection between paper and the wallboard core is essential for intensity that obtains wallboard and wearing quality.And people know and the viewpoint accepted is that this starch almost seldom or not can obviously be strengthened the wallboard core.

In fact, in drying process, most starches neither can be dissolved and be dispersed in the inorganic matrix, also can not migrate to the surface effectively.Therefore, described starch does not play known effect for strengthening the wallboard core.Even starch keeps mainly being dispersed in the mixture, it is discrete inorganic phase of bonding fully also, described inorganic can be any a kind of pattern mutually, such as needle-like crystal, particle or fiber.People repeatedly make great efforts to attempt to find a kind of cheap and useful additive to strengthen the wallboard core, but all do not have to provide better than conventional wallboard in fact performance.

Summary of the invention

A kind of substituted starch strengthens mixture, the polymer phase that it comprises discrete inorganic phase and comprises substituted starch.The microstructure that it is believed that the control mixture can generate the inorganic phase of polymeric film enhanced of infiltration, and this polymeric film comprises substituted starch, and not for the purpose of any restriction claim.For example, selected substituted starch such as the starch hydroxyethyl replacement, that hydroxypropyl replaces or that ethanoyl replaces, has certain substitution value so that the starch that replaces is water insoluble.Described starch passes through blending dispersion.For example, the starch of replacement mix with excessive water form the slurry that can flow before, can dry powder form and the powdered calcium sulfate hemihydrate mix.Subsequently, in drying process, the temperature of slurry raises, and the not molten substituted starch of the overwhelming majority begins to dissolve in excessive water.The starch that replaces is stayed gypsum core and is deposited on the hydrated inorganic phase when drying.Substituted starch, for example starch ethers or starch ester act as the effective tamanori such as the discrete inorganic phase of gypsum crystal, and described gypsum crystal is formed at the hydro-combination process of calcium sulfate hemihydrate and a small amount of substituted starch that adds.

One object of the present invention is to provide a kind of inorganic and tight dispersion of organic composition and interactional mixture.An advantage is, adds intensity and anti-nail drawing property (nail pull resistance) that organic composition has increased mixture significantly on a small quantity, simultaneously with the cost control of mixture in the favourable scope of commerce.Another advantage is, reduce mixture weight and can not sacrifice intensity, thereby be minimized manufacturing cost.

In one embodiment, selected substituted starch has good film forming properties and hydrophilicity, thus make inorganic and organic phase between interact fully.The substituted starch mixture permeates inorganic matrix up hill and dale, and is bonded to inorganic phase consumingly.

Another object of the present invention is, provides a kind of and have low viscous enhancing plaster slurries in mixing and moulding process.For example, the dissolving by postponing starch additive, be raised to dissolved click until the temperature of slurries, slurries keep curing and the drying of low viscosity until wallboard.In one embodiment, utilize this mixture to make in the technology of the goods included curing and drying process, the starch-based polymer of low degree of substitution is used to postpone dissolving, is raised until temperature.An advantage is that the delay dissolving has suppressed slurry plugs or has been bonded on the producing apparatus.Another advantage is, mixture has the molecular dispersion of polymkeric substance, and by dry this mixture, described polymkeric substance still is dispersed in the inorganic matrix of goods.Another advantage is, polymkeric substance unlikely migrates to composite surface, and described migration is unfavorable for improving the intensity of core.

By the following description of carrying out with reference to the accompanying drawings, other characteristics and advantage become more obvious.

Description of drawings

Relation curve between the starch ethers weight percentage that Fig. 1 requires for the reached ideal tensile strength that adds and plate weight (BDWT) poundage (1bs) of per 1,000,000 square feet (MSF), this curve has also provided the weight percentage of starch ethers (SE) of interpolation and described plate in the relation curve between the relative cost of dollar simultaneously.

Relation under the weight percentage (interpolation level) that Fig. 2 A has compared the starch (sour modification), bydroxyethyl starch ether (HE starch), hydrophobic starch ether (hydrophobic SE) and the Vltra tears (HPMC) that add sour modification and the specified panel weight, between the relative increasing amount of anti-drawing property of nail.

Fig. 2 B compared with Fig. 2 A in the per 1,000,000 square feet additional cost of identical additive (cost/MSF) and the relation under the specified panel weight, between the relative increase percentage ratio of anti-drawing property of nail.

Embodiment

Following embodiment does not get rid of other embodiment based on the summary of the invention instruction.On the contrary, the following description only provides some embodiment of specific implementations.

Specific substituted starch can greatly strengthen the intensity of plaster wall slab core.The most of starch that comprises conventional wallboard starch and many substituted starch can not increase the building materials intensity based on gypsum in fact.Herein, the meaning that has increased intensity by adding additive in fact is: compare with the no refill of the equal densities of not utilizing the additive manufacturing, added described additive, can make anti-the drawing property of nail or the flexible intensity increase at least 10% of half inch thick no refill flat samples.

For example, can select to have the substituting group of specified molecular weight and replacement type and degree, interact closely so that it is scattered in the inorganic components and with it equably.The substituted starch enhanced mixture that obtains thus has improved hardness and intensity, and they are the fine combination that can improve anti-drawing property of nail.In addition, along with the increase of additive in the sample, the toughness of sample does not disappear.Therefore, anti-drawing property of nail and the hardness with wallboard of this substituted starch enhanced core is improved.

In certain embodiments, employed substituted starch has dissolution characteristics in this mixture, thereby allows dissolving fully in inorganic core, but can not migrate to the surface in process for making.For example, substituted starch can be low replace, for example substitution value is less than the hydroxyethylamyle of 0.3DS, it is insoluble to cold water." cold water " is used at the mixing process term relevant with the treatment temp of water, and it is lower than the temperature of matrix material in curing and/or drying process.In a kind of wallboard manufacturing process, with before water and wet composition mix, starch is added with the form of dry powder, preferably adds other dry ingredient simultaneously.In mixing, moulding and solidification process, this starch is not dissolving still, therefore, can not influence slurry viscosity or plaster hydration significantly, thereby in all various wallboard manufacturing process of using, seldom or not has modification.In the curing and drying stage of this technology, the substituted starch dissolving has formed aqueous molecular dispersion thing, and has freezed solidly on all gypsum matrix equably; When the temperature of wallboard increases to dissolved click when above, make starch additive strengthen mixture by having formed molecular network.

Except starch, can also use polysaccharide, as long as dispersion, polysaccharide in core material have obtained similar control to the interaction and the migration of polysaccharide in core material of inorganic components.But shown in Fig. 2 B, the cost of substituted starch is very low, thereby tangible commercial advantage is provided.

When selecting enhancement additive, the control of replacement degree and solvent temperature is very important.In the process of moulding manufacturing goods, additive should dissolve easily at some time point, but additive is after dissolving, and the migration amount should be limited.Therefore, additive remains essentially in the in-core of making goods, can strengthen mixture like this.

For example, dry wallboard is usually directed to make wet plate to pass through the multi stage drying kiln, causes heat and mass transport in the whole plate thus.Because heat enters the plate from kiln, excessive water evaporates owing to temperature raises.The surface evaporation of the main slave plate of water vapor is usually by very heavy wallboard paper evaporation.Therefore, in whole drying process, specified temp and moisture curve are along with the variation of whole plate thickness.In one embodiment, the substituted starch of selection is equivalent to change temperature and moisture, thereby in drying process, has formed continuous thin film at whole wallboard in-core.Most of additives are retained in the wallboard in-core.

Substituted starch can derive from the starch source in any native country.The starch that comes from various sources has the ratio of different particle sizes, the polymerization degree (DP) and polysaccharide (amylose starch) and amylopectin (amylopectin).DP is meant the mean number of the dehydrated glucose unit of every mole of starch.Dent corn, waxy maize or potato starch are preferably used owing to low price.Dent corn and potato starch mainly are amylopectins, and the native country potato starch has more polysaccharide and higher DP.Waxy maize is 100% amylopectin.Specific hybrid maize kind can obtain higher amylose starch, and described starch also can be substituted.Before replacing, the starch of high DP is preferably diluted by acid, to obtain suitable viscosity characteristics.

Substituted starch can be insoluble to cold water, this means that they just increase the viscosity of solution up to being heated to above gelling temp.Usually characterize the viscosity sensitivity of the specific starch that is used to cook by the viscosity analysis: the starch that obtains by means of shearing disperses thing to be heated and insulation regular hour section under 90-95 ℃, and then be cooled to 35-50 ℃, the viscosity of measuring whole process simultaneously changes.Measure as can be known by viscosity analysis (RVA), dissimilar modifications and substituted starch have the viscograph of wide region.The typical sensitivity of the cooking relates to: in heating or gastronomical process, grain expansion when starch is heated, particle spalling and molecular dispersion, and when cooling viscosity increase and starch reconfigures.Several points on the viscograph can be used to characterize starch.They are gelling temp, peak viscosity, trough viscosity (continuing viscosity) and final viscosity (referring to accompanying drawing).The starch viscosity curve also is subjected to the influence of shearing rate, pH value, salt and granularity.

Different starch conversions and replacement type can be used for regulating the viscosity characteristics of application-specific.In a kind of composition, the hydroxyl of starch is replaced by other group of ester or ehter bond connection.Based on the consideration of being easy to get property, cost and performance, some other preferred substituted is hydroxypropyl, hydroxyethyl, ethanoyl, hydrophobic grouping, positively charged ion and anionic group.Although these substituting groups cause starch to have different molecular compositions, they have some identical characteristics.Usually, replacement has caused: the reduction of gelling temp; Starch granules expansion and spalling and time and temperature range that starch molecule is released into solution narrowed down; The change of ratio between peak viscosity, trough viscosity and the final viscosity; And the trend of degenerate (reverse) reduces.All these influences are tending towards being modified into film properties.Improved film flexibility and intensity are compared, had to employed starch with modification and unmodified starch in the present composition.The hydrophobicity and the hydrophilic balance that it is believed that substituted starch can change, thus improved with make goods matrix in inorganic affinity degree and binding property mutually.

For example, by changing reaction conditions, can utilize specific substituted radical that starch is replaced to different degree.Substitution value is typically expressed as DS (number of the substituted hydroxyl of each dehydrated glucose unit) or weight percentage (replacing the gross weight of unitary gross weight divided by polymkeric substance).They all are meant the mean number of substitution value, because actual substitution value can be along with hydroxy position and along starch chain with between starch molecule and change.The DS of starch is very crucial for the increase of intensity in the present composition.The starch that DS is low does not have can produce suitable dissolving and low gelation point of dispersive and trough viscosity.And it is solvable in cold water that the starch that DS is high becomes, and influence the hydration of slurry viscosity and plaster.The best starch of DS value has viscosity characteristics and hydrophobic/hydrophilic sexual balance, thereby makes and can carry out best interaction mutually with mixture inorganic.In one embodiment, substituted starch has the substitution value that is not more than 6 weight percentage, and when according to interpolation described herein, in fact this strengthened mixture.In a preferred implementation, selected substitution value scope is the 1-3 weight percentage.In another preferred implementation, selected substitution value scope is the 1.5-2.5 weight percentage.

The intensity enhancing performance of particular type substituted starch is relevant with the viscosity and the substitution value of starch.Utilize the starch for preparing in commercially available starch and the laboratory to study the intensity enhancing Effect on Performance of viscosity to substituted starch.The starch that causes having different viscosity owing to different sour extent of dilution is substituted to identical degree, to determine to strengthen the optimum viscosity of intensity.Utilize the methylol (HP) of about 2.3wt%, the substitution reaction technology by standard, each that the name that comes from Grain Processing Corp is called in the sour treated starch of C68F, C165, C150, C140, C124 and C110 replaces.Utilize digestion and gas chromatographic analysis to determine the substitution level of starch.Starch sample is added in the wallboard prescription with the amount that accounts for plaster 2wt%, then resists nail to draw property testing, and utilize comparative sample to determine the intensity increasing amount as standard to it.The results are shown in the table 1.Viscosity is represented as: the needed raw-material solids component of cooking viscosity that need obtain 1000cps under the 150F.Starch with higher " the solid wt% during 1000cps " has lower viscosity.

The viscosity and the performance of the HP starch that table 1:ICBM replaces

Title	HP substitution value wt%	Solid wt% during 1000cps	2% anti-drawing property of nail improvement
				C110	2.2	9	13％

C124	2.4	11	17％
				C140	2.1	14	23％
C150	2.3	17.5	26％
				C165	2.3	20	26％
C68F	2.3	22.5	17％

Commercially available hydroxyethylation (HE) starch of different viscosity is added in the wallboard sample with the amount that accounts for plaster 2wt%, increases performance to assess its intensity.The sample of being tested comprises from a series of Ethylex starch of AE Staley Co with from a series of Coatmaster starch of Grain Processing Corp.In addition, determined the substitution level of each sample.The results are shown in table 2 and 3.For Ethylex starch and Coatmaster starch, its viscosity data is taken from defined value in the document; That is,, need obtain the needed raw-material solids component of cooking viscosity of 1000cps under the 150F for Ethylex starch; For Coatmaster starch, need obtain the needed raw-material solids component of cooking viscosity of 1000cps under the 75F.

The viscosity and the performance of table 2:Coatmaster HE starch

Title	HP substitution value wt%	The solid wt% of (150F) during 1000cps	2% anti-drawing property of nail improvement
				K500	1.39	4	7％
K540	1.81	17	18％
				K560	1.63	21	27％
K570	2.05	25	21％
				K580	2.02	30	19％
K92F	2.37	43	14％

The viscosity and the performance of table 3:Ethylex HE starch

Title

HP substitution value wt%

The solid of (95F) during 1000cps

2% anti-drawing property of nail improvement

		wt％
				2095	2.12	7.5	2％
2065	1.81	15	29％
				2035	2.24	17.5	22％
2015	2.05	27.5	16％

Table 2 shows: under 150 ℉ during 1000cps value solid component content scope of 17-30wt% be preferred.More preferably, the solid component content scope is 17-21wt%.

By from the laboratory and commercially available have similar DS and viscosity changes or the HE of sour modification and HP starch are collected data show: peak performance appears at the intermediate viscosity position.For the dent corn starch ethers, when being provided, 1000cps viscosity is about under the pairing sour extent of dilution of solids component of 20wt% the increase degree maximum of intensity under 150F.(annotate: provided the Ethylex viscosity under the lower temperature, therefore, the viscosity under the 150F will be lower, and the wt% of solids component will be higher during 1000cps, thereby cause the consistence between the peak viscosity.) it is believed that intermediate viscosity makes it in whole inorganic matrix dissolving and diffusion, and can not cause it to migrate to the surface of mixture too much.Optimum viscosity is according to plaster type and quality and treatment condition, change such as water-stucco ratio and rate of drying and variation of temperature.

Iodine solution dyeing is used to differentiate the position of substituted starch polymkeric substance in gypsum core.Prepare iodine solution by in aqueous isopropanol and water, dissolving iodine (I2) sheet under the room temperature.Utilize and " indentation and embedding (score and snap) " similar technology, with wallboard example cross sectionization to be analyzed, wherein, the surface layer of paper is partly cut across, and be careful not see through sandwich layer, and sample ftractures equably.Then equably solution is applied to the cracking surface of sample.Make starch hydration and complexing several minutes in this solution and the sample.Then under stereoscopic microscope, observe painted sample, and indicate color, the color harmony position of staining starch.

Find out the relation between starch coloration result and the molecular composition, with the trend of further explanation performance.After drying, utilize the feature of several keys to characterize the behavior of starch in the sample.Utilize mainly in color painted in the gypsum matrix, the matrix that the thickness of dark tint characterizes the wallboard sample on the particulate size and color and sample drying face.

Find, be not heated to add the above wallboard sample of gelling temp of starch, not dyeing is gone up in its core or surface, and the profile homogeneous granules is distributed in the core.At this moment, wallboard core and starch never reach the high-temperature that is enough to dissolve starch.Still the dispersive particle form exists starch neither to expand also not.

The color of sample in core that contains the high viscosity substituted starch is shallow, has considerably less dyeing on the surface, and has the bigger homogeneous granules that more spreads in the core.At this moment, starch has reached their gelling temp, and begins dissolving.Then, starch granules or be still expands or the spalling state, but because high starch viscosity and diffusion lentamente.

The color of sample in core that contains the low viscosity substituted starch is shallow, but has dense and dark dyeing along the surface.These starch begin to dissolve fully, and have formed the molecular dispersion thing, but then migrate to the surface in drying process.The degree of moving is represented in utilization along the dyeing thickness of the surface layer of paper.

The sample that contains suitable viscosity substituted starch has dark dyeing in whole core.In these embodiments, starch granules dissolves and diffuses through gypsum matrix, but does not obviously migrate to the surface in drying process.Although these samples may have dyeing to a certain degree, this shows that the surface exists residual particles and/or thin enriched layer,, starch is scattered in the whole gypsum composite basically.

Find that viscosity is for other type substituted starch, also very crucial such as the performance of starch ester.For example, the acid of the hydrophobically modified of buying from National Starch and Chemical Co dilution waxy maize starch Filmkote 54, has been obtained good anti-nail and has been drawn performance when making an addition in the wallboard sample with low-level.But high viscosity starch Filmkote 550 in contrast but produces minimum improvement or does not improve.Equally, when being added in the wallboard sample, it does not dissolve or gains in strength available from the B20F unmodified starch of Grain Processing Corp (being replaced by hydroxypropyl is low).But, when same starch being carried out the acid dilution and being added in the wallboard sample, greatly improved anti-nail and drawn performance.

Optimum viscosity is very important, but also is not whole for substituted starch intensity increases performance.Starch also must have suitable substitution value.If substitution value is low excessively, the change of gelling temp, viscosity characteristics and film forming ability is not enough to improve the intensity of mixture.If substitution value is too high, starch becomes and can be dissolved in cold water, and this moment, it influenced slurry viscosity and plaster hydration, and does not obviously improve intensity.By replace the dent corn starch Wallboard Binder of the acid dilution that derives from AE Staley with various HE replacement amounts, can confirm these effects.These samples are added in the wallboard prescription, resist drawing property of nail to test, thereby determine the intensity increasing amount, the results are shown in the table 4.

The substitution value and the performance of table 4:ICBM HE starch

Replace type	Substitution value wt%	2% anti-nail draws improvement
			HE	0.03％	7％
HE	2.52％	22％
			HE	11.43％	9％

Even the scope of substitution value is in and makes starch be dissolvable in water cold water and have than low gel temperature, substitution value also can influence the increase of intensity.It is believed that DS influences the film forming properties of starch and to the affinity of inorganic matrix (being gypsum crystal at this moment).The starch of preparation has the HP replacement amount of increase.Equally, make the wallboard sample of these starch additives that contain 2wt%, and test its mechanical property.Anti-nail draws the peak value of performance to be found under the situation that is positioned at 1.5-2.5wt%HP.Find that also starch ester has similar trend.Can prepare the replacement amount and increase ethanoyl sample and the butyryl radicals sample that still is no more than cold water solubility.The sample of substitution value value has reached the maximum value of intensity increase performance in the middle of utilizing.

The starch type that replaces also can influence dissolving and performance.When utilizing various groups that it is carried out modification or replacing, the waxy maize of being made up of the starch (amylopectin) of a shape form generally can provide good intensity to increase performance.This be considered to since with inorganic matrix such as being that gypsum crystal has due to the strong affinity.Be added into the plaster slurries by the dilution of dissolved acid in advance waxy maize, can confirm described interaction.The viscosity of this solution is not too high, has stoped plaster solidifying in gypsum.This may be because thereby amylopectin has suppressed the cause of their growth at the gypsum crystal surface coordination of growth.When modification or replace that amylopectin is not dissolved in advance or when being dissolvable in water in the cold water, this neither problem, because solidifying of plaster occurs in before the starch dissolution.

Also potato starch can be replaced, the intensity that is used for inorganic complex with manufacturing increases additive.Find that having the intensity that the replacement potato starch of preferred viscosity and substitution value can give increases performance, but has different dissolution characteristics.After the dry composite thing, most of particle is still kept intact.This may be since in the potato starch bigger particle and higher polysaccharide cause.It is believed that a part of substituted starch leaches and enter matrix from particle, and the intensity major part of increase causes therefrom.When tapioca (flour) and any other native country starch source that can expect being adjusted to suitable viscosity and replacing in given DS scope, then they also become intensity increases additive.Basically based on the starch type of gaining in strength of recently selecting to be used for particular composition of adding performance and performance and cost.

The substituted starch of the present composition is particularly advantageous, reason be they can gain in strength effectively and cost low.They can improve the intensity of the plaster wall slab under this wallboard weight with few additive, perhaps reduce the weight of wallboard and can not lose intensity.The cost of the starch of gaining in strength in both cases, is renderd a service all extremely important.Increase the improvement of performance by intensity, can offset substituted starch and the cost that increases.Few substituted starch can be added in the mixture, reach and poor efficiency starch or the identical effect of additive.Therefore, the described ratio that utilizes overall performance that substituted starch obtains and the ratio between the cost to obtain greater than other additive of gaining in strength.

Utilize simple cost analysis, can find to be used to reduce the ideal interpolation level of plaster wall slab weight and cost.Gypsum core intensity makes to make to have the wallboard than light weight that identical anti-nail draws performance with the increase and the composite sandwich structural of weight ratio.Contain less material in the wallboard core than light weight, cause thus more saving cost than adding starch.But, during the interpolation higher level of the starch of gaining in strength, generally can not continue to increase described performance.In some cases, the interpolation cost of starch begins to have surpassed its ability of reduction weight and the saving of cost.For example, account for the HE starch of plaster 1.5wt%, the anti-nail that minimum wallboard weight is reduced to by ASTM can be drawn standard, promptly, saved 3% manufacturing cost this moment from 1550 pounds/MSF to 1400 pound/MSF by interpolation.

In other cases, such as when the time for high-performance building materials wallboard, the performance of every kind of additive is more important.These wallboards contain the additive that is used to gain in strength of high percentage ratio usually.When more the organic additive of volume was added in the mixture, other factor became more important such as fire-retardant and anti-microbial property.Flame retardant resistance is very crucial advantage for inorganic component, particularly plaster wall slab, and this performance should not be subjected to the disadvantageous effect of additive.Also can contain flame-retardant additive in the said composition such as phosphoric acid salt, but described flame-retardant additive is relatively more expensive usually.Mouldy susceptibility is the performance of paying close attention to more at present that must mention in building materials.A large amount of anti-microbial properties that use organic composition obviously to reduce mixture usually, and need to add antiseptic-germicide.Therefore, thus keep the amount of the organic additive of gaining in strength to reach the ideal mechanical property for lowland as far as possible be very favorable for this.At this moment, when selecting the additive of gaining in strength, the ratio of strength property and additive is extremely important.

Also the starch of gaining in strength can be used in combination with other additive and improve performance.When being added as the unique additive that increases wallboard intensity, starch has increased the hardness and anti-the drawing property of nail of wallboard, but makes that also gypsum is more crisp.Also can add the effect that other additive improves substituted starch.For example, in inorganic complex, the starch of replacement can be used in combination with the ether of cellulose of gaining in strength.Known specific ether of cellulose can improve the toughness and the flexible intensity of inorganic complex, and can be used for offsetting the fragility that starch brings.When in wallboard, being used in combination, anti-the drawing property of nail of wallboard, flexible intensity, hardness and toughness have been caused improving.In some cases, the combined machine performance of ether of cellulose and substituted starch is greater than the summation of single performance.

Also can contain fiber in the mixture, to improve flexible intensity, toughness and mechanical bruise resistance.Known fiber can reduce the damage that is caused by operation, installation and use fragility inorganic complex.It is believed that in mixture a small amount of ether of cellulose that adds, help bonding between fiber and the inorganic matrix, and increased their tensile strength.The result is, this is better than the performance that separately ether fiber or ether of cellulose is added in the mixture.In a preferred implementation,, glass fibre is added owing to having high strength, low cost and flame retardant resistance.

In one embodiment, substituted starch, ether of cellulose and glass fibre are added with the amount that accounts for plaster 10wt%, 2wt% and 2wt% respectively.The slurries that obtain are cast 1/4 inch the plate that does not have surface layer, and carry out two stage dryings.The wallboard that obtains also has good anti-nail and draws performance and flexible intensity and superior corrosion resistance under low weight.Similar prescription can comprise that also waterproof additive is such as paraffin wax emulsions.Also can add antiseptic-germicide, to reduce mouldy susceptibility.At last, such as vinylformic acid or vinyl acetate copolymer emulsion, purpose is to be convenient to paint or surface finishing afterwards with exsiccant wallboard primer coating.

Embodiment

The comparative example 1: the dent corn starch of sour modification (Hi Bond)

The dried ingredients uniform mixing that will comprise 1000g plaster, derives from the dent corn starch of 10g Hi Bond acid modification of Bunge Milling and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 250 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

The comparative example 2: the dent corn starch of sour modification (Wallboard Binder)

The dried ingredients uniform mixing that will comprise 1000g plaster, derives from the dent corn starch of 10g Wallboard Binder acid modification of AE Staley and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with low " solidifying " speed.Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 200 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

The comparative example 3: the dent corn starch (C165) of sour modification

The dried ingredients uniform mixing that will comprise 1000g plaster, derives from the dent corn starch of 10g C165 acid modification of Grain Processing Corp. and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 200 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

The comparative example 4: the dent corn starch (20g) of sour modification

The dried ingredients uniform mixing that will comprise 1000g plaster, derives from the dent corn starch of 20g C165 acid modification of Grain Processing Corp. and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 200 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

Hydroxyethylamyle

The dried ingredients uniform mixing that will comprise 1000g plaster, derives from the hydroxyethylated sour modification dent corn starch of 20g CoatmasterK55F of Grain Processing Corp. and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 250 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

The dried ingredients uniform mixing that will comprise 1000g plaster, derives from the hydroxyethylated sour modification dent corn starch of 20g CoatmasterK54F of Grain Processing Corp. and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with low " solidifying " speed.Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 250 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

The dried ingredients uniform mixing that will comprise 1000g plaster, derives from the hydroxyethylated sour modification dent corn starch of 20g CoatmasterK56F of Grain Processing Corp. and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 250 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

The dried ingredients uniform mixing that will comprise 1000g plaster, derives from the hydroxyethylated sour modification dent corn starch of 20g CoatmasterK57F of Grain Processing Corp. and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 250 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

The dried ingredients uniform mixing that will comprise 1000g plaster, derives from the hydroxyethylated sour modification dent corn starch of 20g CoatmasterK58F of Grain Processing Corp. and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 250 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

The dried ingredients uniform mixing that will comprise 1000g plaster, derives from the hydroxyethylated sour modification dent corn starch of 20g CoatmasterK500 of Grain Processing Corp. and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with low " solidifying " speed.Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 250 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

The dried ingredients uniform mixing that will comprise 1000g plaster, derives from the 20g Ethylex 2065 hydroxyethylated sour modification dent corn starch of AE Staley and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 250 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

The dried ingredients uniform mixing that will comprise 1000g plaster, derives from the 10g Ethylex 2065 hydroxyethylated sour modification dent corn starch of AE Staley and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 250 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

The dried ingredients uniform mixing that will comprise 1000g plaster, derives from the 30g Ethylex 2065 hydroxyethylated sour modification dent corn starch of AE Staley and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with low " solidifying " speed.Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 250 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

The dried ingredients uniform mixing that will comprise 1000g plaster, derives from the hydroxyethylated sour modification potato starch of 20g Kollotex of Avebe and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 250 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

The dried ingredients uniform mixing that will comprise 1000g plaster, derives from the sour modified tapioca starch of 20g ethanoylization of Avebe and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 250 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

Hydroxypropylated starch

To comprise that dried ingredients uniform mixing that 1000g plaster, 20g derive from the sour modification dent corn starch of PureCoteB760 hydroxypropylation of Grain Processing Corp. and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 250 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

The dried ingredients uniform mixing that will comprise the sour modification dent corn starch (degree of hydroxypropylation is 2.34%) of 1000g plaster, 20g ICBM SE-24 hydroxypropylation and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 250 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

The starch that hydrophobic group replaces

The dried ingredients uniform mixing that will comprise 1000g plaster, derives from the hydroxyethylated sour modification waxy maize starch of 20g Filmkote of National Starch and 10g levigated gypsum accelerator together.Then this mixture is added in (102F) tap water of the 1200g heat in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 12 " * 12 " * 1/2 " paper pocket in the horizontal mold, and utilize sheet glass that its surface is pressed into 1/2 ".Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 250 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

Hydroxyethyl comparative example/Uniroc embodiment 1

Uniroc embodiment 1

To comprise that 1000g plaster, 200g derive from dried ingredients uniform mixing that the hydroxyethylated starch of CoatmasterK57F of Grain Processing Corp., 10g levigated gypsum accelerator and 5g sulfonated carbamide disperse thing together.Then this mixture is added in cold (60F) tap water of 1200g in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 10 " * 12 " * 1/4 " in the mould, and its surface flattened with scraper.Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 200 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

Glass fibre

Uniroc embodiment 2

To comprise 1000g plaster, 200g derive from the hydroxyethylated starch of CoatmasterK57F of Grain Processing Corp., 20g 1/2 " cut off dried ingredients uniform mixing that glass filament bundle, 5g sulfonated carbamide disperse thing and 2g levigated gypsum accelerator together.Then this mixture is added in cold (60F) tap water of 1300g in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 10 " * 12 " * 1/4 " in the mould, and its surface flattened with scraper, and cover its surface with sheet glass.Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 200 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

Uniroc embodiment 3

To comprise 1000g plaster, 100g derive from the hydroxyethylated starch of CoatmasterK57F of Grain Processing Corp., 15g 1/2 " cut off dried ingredients uniform mixing that glass filament bundle, 5g sulfonated carbamide disperse thing and 2g levigated gypsum accelerator together.Then this mixture is added in cold (60F) tap water of 1300g in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 10 " * 12 " * 1/4 " in the mould, and its surface flattened with scraper, and cover its surface with sheet glass.Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 200 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

Uniroc embodiment 4 (having ether of cellulose)

To comprise 1000g plaster, 100g derive from the hydroxyethylated starch of CoatmasterK57F of Grain Processing Corp., 20g 1/2 " cut off glass filament bundle, the 20g surface-treated hydroxyethylmethyl-cellulose (it has the solvability of delay, HEMC 15kPFR) that derives from Culminal, 5g sulfonated carbamide and disperse thing and 2g levigated gypsum accelerator together at interior dried ingredients uniform mixing.Then this mixture is added in cold (60F) tap water of 1300g in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 10 " * 12 " * 1/4 " in the mould, and its surface flattened with scraper, and cover its surface with sheet glass.Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 200 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

Uniroc embodiment 5 (wood fibre)

To comprise that 1000g plaster, 200g derive from dried ingredients uniform mixing that the wet recycled pulps (the dried fiber of 20g) of the hydroxyethylated starch of CoatmasterK57F of Grain Processing Corp., 60g, 5g sulfonated carbamide disperse thing and 5g levigated gypsum accelerator together.Then this mixture is added in cold (60F) tap water of 1300g in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 10 " * 12 " * 1/4 " in the mould, and its surface flattened with scraper.Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 200 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

Uniroc embodiment 6 (glass and wood fibre) with ether of cellulose

To comprise 1000g plaster, 100g derive from the wet recycled pulps (the dried fiber of 10g) of the hydroxyethylated starch of CoatmasterK57F of Grain Processing Corp., 30g, derive from Culminal 20g surface-treated hydroxyethylmethyl-cellulose (it has the solvability of delay, HEMC15kPFR), 10g 1/2 " cut off glass filament bundle, 5g sulfonated carbamide disperses thing and 2g levigated gypsum accelerator at interior dried ingredients uniform mixing together.Then this mixture is added in cold (60F) tap water of 1300g in the Waring blender of 4L, splashes into 2 retardant simultaneously.Said composition was mixed for 10 seconds with the setting rate of " low ".Pour the slurries that obtain into 10 " * 12 " * 1/4 " in the mould, and its surface flattened with scraper, and cover its surface with sheet glass.Sample solidified in 10 minutes fully, and it is taken out from mould, put into the convection oven of 200 degree then.This sample drying to 75% of its former weight, is then put it in 50 convection oven of spending until complete drying.

Claims (30)

1. organic-inorganic composition, it comprises:

The starch that replaces, it has at least one substituent replacement degree;

Inorganic phase; And

Water, wherein, the starch, inorganic phase and the water that replace mix and have formed mixture, at least a portion of inorganic phase combines with water, and selected substitution value and substituting group should make the starch that replaces under mixing temperature, do not dissolve, but in the treating processes of mixture along with being increased to the small part dissolving and having formed the film that is dispersed in basically in the whole organic-inorganic composition of temperature, wherein the intensity of organic-inorganic composition is increased in fact.

2. the organic-inorganic composition of claim 1 is characterized in that, described at least one substituting group is selected from the substituting group in the group of being made up of ether substituting group or ester substituting group.

3. the organic-inorganic composition of claim 2 is characterized in that, described at least one substituting group is selected from the substituting group in the group of being made up of the ester substituting group.

4. the organic-inorganic composition of claim 2 is characterized in that, described at least one substituting group is selected from the substituting group in the group of being made up of the ether substituting group.

5. the organic-inorganic composition of claim 1 is characterized in that, described at least one substituting group is selected from the substituting group in the group of being made up of alkyl substituent, ethyl succinate substituting group, cationic substituent, anion substituent and combination thereof.

6. the organic-inorganic composition of claim 1 is characterized in that, the starch of described replacement is by the starch of hydroxyethylation, hydroxypropylation or ethanoylization.

7. the organic-inorganic composition of claim 1 is characterized in that, described at least one substituent selection should make the starch that replaces have film forming properties and hydrophilicity, thereby makes the starch that replaces inorganicly form film on mutually aqueous.

8. the organic-inorganic composition of claim 1 is characterized in that, the starch of replacement has formed permeable polymeric film.

9. the organic-inorganic composition of claim 1 is characterized in that, the selection of described at least one substituting group and substitution value makes under the viscosity of 1000cps, the weight percentage of solids component is 4% at least.

10. the organic-inorganic composition of claim 9 is characterized in that, the selection of described at least one substituting group and substitution value makes under the viscosity and 150 Fahrenheit degrees of 1000cps, the weight percentage scope of solids component is 9-43%.

11. the organic-inorganic composition of claim 9 is characterized in that, described at least one substituting group is a hydroxypropyl, and the selection of substitution value makes under the viscosity and 150 Fahrenheit degrees of 1000cps, the weight percentage scope of solids component is 14-20%.

12. the organic-inorganic composition of claim 9 is characterized in that, described at least one substituting group is a hydroxyethyl, and the selection of substitution value makes under the viscosity and 150 Fahrenheit degrees of 1000cps, the weight percentage scope of solids component is 17-30%.

13. the organic-inorganic composition of claim 12 is characterized in that, the selection of the substitution value of hydroxyethyl should make under the viscosity of 1000cps and 150 Fahrenheit degrees, the weight percentage scope of solids component is 17-21%.

14. the organic-inorganic composition of claim 12 is characterized in that substitution value is less than 0.3.

15. the organic-inorganic composition of claim 12 is characterized in that substitution value is less than 0.6wt%.

16. the organic-inorganic composition of claim 12 is characterized in that, the scope of substitution value is 1-3wt%.

17. the organic-inorganic composition of claim 1 is characterized in that, starch at least a portion of replacement is made up of amylopectin.

18. the organic-inorganic composition of claim 17 is characterized in that, the starch of replacement is amylopectin basically.

19. the organic-inorganic composition of claim 1 is characterized in that, all basically substituted starch are dissolved and formed polymeric film.

20. the organic-inorganic composition of claim 1 is characterized in that, the starch of replacement is the acid dilution waxy maize starch of hydrophobically modified.

21. the organic-inorganic composition of claim 1 is characterized in that, the starch of replacement is that starch and described at least one substituting group of acid dilution is hydroxypropyl.

22. the organic-inorganic composition of claim 21 is characterized in that, selected replacement extent and scope is the hydroxypropyl of 1.5-2.5wt%.

23. the organic-inorganic composition of claim 1 is characterized in that, the starch of replacement is the acid dilution waxy maize starch of ethanoylization.

24. the organic-inorganic composition of claim 1 is characterized in that, the amount of the starch of replacement is not more than the starch of replacement and the 2wt% of inorganic weight mutually.

25. the organic-inorganic composition of claim 1 is characterized in that, it further comprises the fiber that is dispersed in whole organic-inorganic composition basically.

26. the organic-inorganic composition of claim 25 is characterized in that, described fiber is a glass fibre.

27. the organic-inorganic composition of claim 1 is characterized in that, it further comprises cellulose ether additives, and the selection of this additive makes to work in coordination with and improves flexible intensity.

28. the organic-inorganic composition of claim 27, it is characterized in that described ether of cellulose is selected from the ether of cellulose in the group of being made up of Vltra tears, methylcellulose gum, hydroxyethylmethyl-cellulose, Natvosol, hydroxypropylcellulose, cationic cellulose, carboxymethyl cellulose and combination thereof.

29. the organic-inorganic composition of claim 28 is characterized in that, described ether of cellulose is a Vltra tears.

30. the preparation method of organic-inorganic composition goods, this method has been utilized the processing step with blend temperature range, and this method comprises:

Selection has certain substitution value, the polymerization degree and has the starch of at least one substituent replacement, so that the starch that should replace is water insoluble in blend temperature range;

Under the certain temperature in blend temperature range, in the successive processing step starch that replaces, inorganic phase and water are mixed;

Form composite article;

At least a portion of inorganic phase is combined with water;

Temperature is increased to more than the blend temperature range, and wherein, the starch of replacement is partially dissolved in the water at least; And

Composite article is solidified and drying, so that the starch that replaces has formed the successive polymeric film in composite article.

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