CN1882665A - Use of an aqueous dispersion of at least one biodegradable polymer containing at least one stabilizing agent for the preparation of an aqueous filmogenic composition - Google Patents

Abstract

The invention relates to the preparation of an aqueous filmogenic composition wherein dry matter, which is at least equal to 35 %, for, is used in addition to an aqueous dispersion consisting of an organic phase dispersed in a dispersing aqueous phase, said dispersion containing, in relation to the dry matter,94 - 99.5 % dry organic phase comprising at least one biodegradable polymer, and 0.5-6 % of at least one stabilizing agent.

Description

Comprise the application of water-dispersion in preparation moisture film formation composition of at least a biodegradable polymkeric substance of at least a stablizer

Technical field

The water-dispersion that the present invention relates to comprise at least a biodegradable polymkeric substance of at least a stablizer forms application in the composition at preparation high solid content moisture film.

Say that more specifically the film that the present invention relates to obtain thus forms the application of composition in preparation aqueous adhesive composition and aqueous pigment compositions.

Background technology

Among the present invention, term " moisture film formation composition " should be understood that a kind of composition, and it can form film or dressing by removing the water that is present at first in the described composition.

Term " aqueous adhesive composition " should be understood that a kind of moisture film forms composition, and it can stick on the assistant agent, or forms seal between two kinds of other materials, no matter the character of these two kinds of materials is identical or different.

Particularly; said composition can be used as the anti-composition of scribbling of temporary protective metal plate, wood varnish; the composition of wall waterproof; the composition of processing or applying glue textiles; chemical fertilizer, medicine or seed are carried out the composition of dressing, or as the tackiness agent of leather, paper, timber, textiles (woven fabric or non-woven fabric), synthon, plastics, glassware and other materials.

The water content of this aqueous adhesive composition usually these composition total weight 30 and 95% between change.

Water is as the solvent of the component of inertia dispersion agent or these compositions, and can adjust the viscosity and the rheology of these compositions, they are easier to by dressing, casting, spraying, dipping bath or immersion or by utilizing brush, cylinder, forme or other instruments, be applied to the surface or the raw material of need of coating or applying glue

Such glue paste mainly comprises and is dissolved in the water or simply is dispersed in tackiness agent and assistant agent in the water.

Among the present invention, term " aqueous pigment compositions " should be understood that also a kind of film that forms forms composition in the aqueous suspension of pigment, tackiness agent and assistant agent.

Particularly, water-soluble color compositions can be that coating, aqueous paint and moisture film form pigment agent, for example, comprises the weighting agent of tackiness agent.

For example, in the paper production was used, whether the root of the finished product outward appearance that a kind of like this aqueous pigment compositions is a paper (opaque, white, smooth and glossy) was applicable to paper and prints particularly that multicolor printing plays an important role.

Water is the main component of color compositions, and its content is generally 30% to 95% of described color compositions gross weight.It is the medium of other components.

Pigment has been formed the solid weighting agent of described aqueous pigment compositions.They are materials such as lime carbonate, calcium sulfate, barium sulfate, sulfuration calcium aluminate, kaolin, Magnesium Silicate q-agent, titanium dioxide or plastic pigments class normally.

With regard to coating, the content of pigment is usually in 80 to 92% (weight) of the solid content (SC) of aqueous pigment compositions, pigment plays a part to cover paper fibre or make it smooth usually, also to the optical property (whiteness of paper fibre, opaqueness, gloss) or printing characteristic (with regard to coating or coating) work.

Form pigment agent and coating with regard to moisture film, the content of pigment in 10 to 95% (weight) of water-soluble color compositions solid content, preferably in 35 to 95% (weight) of solid content, is decided (tarnish, press polish or gloss paint) on selected prescription kind usually.

No matter be aqueous pigment compositions or aqueous adhesive composition, assistant agent is the subsidiary material that are present in slightly in the moisture film formation composition.

The content of the assistant agent of these addings forms 1 to 3% (weight) of the solid content of composition usually at described moisture film.

They are divided three classes usually.

The first kind is equivalent to formula agent, alkaline agent for example, dispersion agent (Sodium hexametaphosphate 99, sodium polyacrylate), wetting agent, defoamer (mineral oil, silicate resinous product, fatty acid ester, fatty amine) or biocides (quaternary ammonium, lime acid, acetaldehyde, dyestuff).

The second class assistant agent is given described film and formed the superperformance of composition on machine: it is equivalent to rheology modifier (vegetable fibre matter mixture for example, the Polyurethanes thickening material), water retention aid (carboxymethyl cellulose, starch and derivative thereof, casein, protein, polyol) or slipping agent (calcium stearate, sulphonated oil, polyol).

This is can at full speed be applied on the machine (speed on paper machine may greater than 1500 meters/minute) because must make this moisture film form composition sometimes.

The 3rd class assistant agent can improve or adjust the final response that moisture film forms composition: it is equivalent to non-solvating agent (linking agent and resin, urea-formaldehyde for example, carbamide, oxalaldehyde, zirconates), white dyes (two, four or six sulfonation diphenyl ethylene derivatives), coalescing agent or dark dyestuff (the purple BNZ of the sun, unisperse indigo plant).

No matter be aqueous pigment compositions or aqueous adhesive composition, moisture film forms the final component of composition usually as tackiness agent:

The content of-coating forms 5 to 20% of composition solid content at moisture film,

The content that-moisture film forms pigment agent (weighting agent that for example comprises tackiness agent) forms 5 to 90% of composition solid content at moisture film,

-paint, no matter be matt, press polish or gloss paint, it form 5 to 65% of composition solid content at moisture film.

They play an important role guaranteeing coat of colo(u)r or film-coat or remove in the dressing that obtains after the moisture bonding.

It is relevant with the concentration of the character of the bounding force of employed tackiness agent, the pigment that adds alternatively and moisture film formation composition that their content selects.

It is natural that tackiness agent is generally, for example starch (wheat, corn) or protein (casein), or synthetic, for example polyvinyl alcohol or resin emulsion.

Preferably, use the tackiness agent of being made up of resin emulsion (or " polymer water disperse phase "), it is colloidal dispersion at aqueous phase that it is equivalent to synthetic polymer, that is, the microparticle dispersion suspension of polymkeric substance is also referred to as polymer emulsion or suspension liquid sometimes at aqueous phase.

Usually, the direct oil-in-water emulsion polymerization method of synthon is mainly used in the preparation of the water-dispersion phase of synthetic polymer.

This resin emulsion comprises the polymer beads that direct oil-in-water emulsion polymerization is formed by monomer usually, for example, and styrene/divinyl, styrene/butyl acrylate, methyl methacrylate/divinyl or ethylene acetate/acrylic acid butyl ester.

Each of these monomer centerings gives resin emulsion following characteristic:

-hardness, the optical density of glossiness or printing ink (styrene, vinyl cyanide or methyl methacrylate),

-Nai solvent and finish (vinyl cyanide),

The aging of-ultraviolet light resistant (methyl methacrylate, butyl acrylate or divinyl)

-porosity (vinyl acetate),

-bounding force or softness (butyl acrylate or divinyl).

Usually, the synthetic latex that film forms in the composition accounts for 45 to 60% of solid content, its density about 1, brookfield viscosity be 100mPas to 300mPas, the pH value is between 4.5 to 8.

Yet the person skilled in the art knows, the main drawback of the water-dispersion phase of this class synthetic polymer is that these synthetic products are not biodegradable or compost not, and is difficult to recycle, these drawbacks limit their application.

Lack biodegradability and cause serious environmental problem, this problem is present in especially refuse is embedded in the subterranean process.

Therefore suggestion uses starch derivative as tackiness agent.Yet though starch is biodegradable, its bounding force is more weak, and to water sensitive, it is especially unfavorable that these form in the composition application at film, and for example, in colored offset printing, washing outlet or offset printing Yin Moli have the existence of water.

For overcoming the problems referred to above, how, become the theme of strengthening research and development from the water-dispersion phase of biodegradable polymer manufacture polymkeric substance.

The term " biodegradable " polymkeric substance " should be understood that a kind of like this polymkeric substance, it can particularly be degraded under the effect of soil microorganisms in microorganism, and can particularly degrade under the effect of water at natural force.

The water-dispersion of known biodegradable polymkeric substance like this can only obtain by utilizing volatile organic solvent mutually usually, and is for example, disclosed in Japanese patent application JP 10-101911 and the U.S. Pat 5747584.

Specifically, the water-dispersion that U.S. Pat 5747584 discloses the biodegradable polymkeric substance of pHA class especially is used for the prescription of dispersing binder mutually, and it can be used for the tackiness agent of non-woven material.

Yet such water-dispersion must be used toluene mutually, ethyl acetate, and acetone, halogenated solvent or other suitable volatile organic solvents prepare and get.

Term " volatile organic compound " should be understood that any organic compound, and it has 10Pa or above vapour pressure under 25 ℃, or has corresponding volatility under certain condition.

Yet, known to applicant company, have three kinds of currently known methodss can obtain water-dispersion phase at least a no volatile organic solvent, biodegradable polymkeric substance.

First kind of known method is by suppressing the disperse phase of biodegradable polyester, and this polyester has high solid content (SC) and very high viscosity.

On this method, the method that European patent application EP 1302502 provides comprises: under high temperature and high pressure, handle the melting obtained mixture of biodegradable polyester and water emulsifier by extrusion process, this emulsifying agent has certain surface tension and some assistant agent, thereby obtain a kind of water-dispersion phase, it has at least 40% solid content and 1000mPas at least, preferred 1500 to 10000mPas viscosity.

This method is included in melts biodegradable polyester in the forcing machine, add water emulsifier then in the melting obtained mixture downstream.Subsequently, mixture mixes being less than or equal under 100 ℃ of temperature.

In addition, patent application WO 97/49762 discloses a kind of water-dispersion phase of the biodegradable polymkeric substance that can obtain by compacting, and it comprises the starch through the esterification modification that is dispersed in the water.This patent application also discloses a kind of solvent method that need not of making described water-dispersion phase.

This method is included in the melting obtained mixture of preparation polymkeric substance and softening agent under 100 to 180 ℃ the temperature, then at the high-temperature stirring mixture, and adds entry and dispersion agent gradually.

Second method, according to present state of the art, applicant company provides at least a water-dispersion phase with the biodegradable polymkeric substance that does not contain volatile organic solvent, the water-dispersion of a kind of biodegradable polymkeric substance that this method comprises is formed by being dispersed in water-dispersion Xiangli organic phase, non-volatility organism in the system, the dispersive organic phase comprises at least a viscosity reducing agent.

The water-dispersion of these at least a biodegradable polymkeric substance has formed the theme of this patent application mutually, and not examination is submitted in France on September 12nd, 2003 by applicant company as yet.

These at least a biodegradable polymer water disperse phase comprise viscosity reducing agent, it is characterized in that the ability of solubility parameter and formation hydrogen bond, and employed reductive agent and described biodegradable polymkeric substance have a specific weight ratio.

Viscosity reducing agent (or " softening agent ") is can be heavy organism composition, preferred biodegradable or compost, it adds in the polymkeric substance, has destroyed forming using mutually mutually between the mechanicalness clinging power in full-bodied chain and the described polymkeric substance at least in part.

And owing to do not contain volatile organic compound, the content of volatile organic compound (or VOC) is no more than described water-dispersion phase component mutually in these water-dispersions, that is to say, equal 5000ppm at most,, be more preferably less than and equal 500ppm preferably smaller or equal to 1000ppm.

According to the third method of the state of the art, can from microorganism, directly obtain at least a polyhydroxy-alkanoates class, the water-dispersion phase of the bacillary biodegradable polymkeric substance that stability is variable.

This method can be used to prepare the water-dispersion phase of the biodegradable polymkeric substance that does not contain volatile organic solvent, because the natural particle with biodegradable polymkeric substance that this method based on the extract by cytolysis, continues is purified by chemistry or enzyme catalysis route.

A.Dufresne and E.Samain be at Macromolecules, and 1998,31, described among the 6426-6433 from edible oil and inhaled stable poly-(beta-hydroxy octanoate) or the water-dispersion phase of pHO of preparation hair bacillus (Pseudomonas oleovorans) bacterial classification.This preparation method is undertaken by fermentation under controlled pH environment, and water-based pHO disperse phase uses clorox to extract.

The lasting parcel of specific proteins group polymer beads in suspension is the reason of the spontaneous stability of these water-baseds pHO disperse phase, and here, this specific proteins is the murein capsule.

The water-dispersion that known these class methods also are used to prepare biodegradable polymkeric substance microbe-derived rather than pHO (for example, the copolymerization object pHBV of hydroxyl valerate and butyric ester) mutually.

The water-dispersion that does not contain the biodegradable polymkeric substance of volatile organic solvent can form at moisture film mutually and be used as tackiness agent in the composition, and in the state of the art, these water-dispersions are especially separated from microbial species mutually.

Particularly, patent application WO 91/13207 disclosed water-dispersion phase, comprise a kind of colloidal suspended substance in the water, this colloidal suspended substance basically by β-polyhydroxy-alkanoates (for example, beta-hydroxy-butanoic acid ester and beta-hydroxy valerate) polymkeric substance that forms or the amorphous particle of copolymerization object composition, it extracts from Biological resources such as Alcaligenes (Alcaligenes eutrophus) or edible oil suction hair bacillus (Pseudomonas oleovorans) especially, and they are used to prepare self supporting film or biodegradable paper.

This patent disclosure can from microorganism, extract useful resin emulsion, it has as tackiness agent of color compositions and uses required characteristic, and has shown the advantage in biodegradable and recyclable coating or coated paper.

Yet, the binding property of disclosed resin emulsion in this patent application, only by single family polyhydroxyalkanoatefrom show that side chain wherein comprises 1 to 12 carbon atom.

And these resin emulsions that exist with native state are mainly amorphous wet granular form, and they have the shortcoming that is in high crystalline state, particularly when dry and/or after being coated on the carrier.

In fact, when the flocculation that must quicken emulsion grain simultaneously in order to obtain having the dry film of suitable machinery and optical property, the crystalline trend of these resin emulsions can not be employed them well.

Particularly, the film forming ability of polymer water disperse phase, need be after water evaporation (this phenomenon is called " flocculation ") obtain the perfect infiltration/thawing of dispersed polymeres particle.

Therefore, at coating, during some of coating or paint used, the non-crystalline state that must keep resin emulsion, promoting described particle to melt, thereby obtain to be similar to machinery and the optical property that the resin emulsion (its for nonbiodegradable or be difficult to recirculation) of those common synthetic polymers just has at substrate surface.

Therefore patent application WO 91/13207 suggestion preparation color compositions improves the characteristic of the bacteroidal resin emulsion that uses soap or stain remover class tensio-active agent, accurately retrains the heating-induced crystallization of resin emulsion.

Because this reason, disclosed color compositions in this international patent application is because therefore biodegradable polymkeric substance crystallization consumingly after being coated on the carrier is difficult to use in Application Areas of the present invention in practice.

And, in this international patent application, only stipulated that the solid content of resin emulsion forms film for from 15 to 30%, with regard to time of drying and the speed on industrial machine, this point is particularly unfavorable.

This patent is also open at room temperature in addition, after water evaporates from resin emulsion,, and/or in the process of dry film clothing, these solvents are exposed in the steam by the halogenated solvent of use chloroform class, can obtain fine and close, transparent film, the mechanical property of this film is improved slightly.

Must use volatile organic solvent in this method, constitute another serious obstacle in the industrial application.

U.S. Pat 6024784 discloses the application of poly-(3-polyhydroxy-alkanoates), it has from wall scroll or many unsaturation side chains of 6 to 16 carbon atoms of Pseudomonas fluorescens (Pseudomonas fluorescens) extraction, and it is as the tackiness agent of the color compositions of preparation paint.

Yet though biodegradable polymkeric substance can provide with the resin emulsion form usually, in fact, according to experiment, U.S. Pat 6024784 has only been stipulated the application of poly-(3 polyhydroxy-alkanoates) organic solution (pHA) on the preparation solvent paint.

As before the tackiness agent, advise with an organic solvent as sherwood oil, diethyl ether or chloroform class, aromatic solvent such as toluene or xylene, or aliphatic solvent dissolves pHA.

Owing to only provide the solvent paint prescription, therefore, this technical scheme does not meet required environmental requirement.

From The above results as can be known, need provide a kind of film to form composition, the water-dispersion phase that comprises at least a biodegradable polymkeric substance, described polymkeric substance does not preferably contain any volatile organic compound, has high solid content, can only comprise biodegradable component, be easy to be applied to moisture film and form preparation of compositions, no matter be aqueous pigment compositions or aqueous adhesive composition, coating for example, moisture film forms pigment preparation, tackiness agent or water-borne coatings, and the preparation of said composition need not trouble, difficulty and step complexity.

Summary of the invention

Applicant company has realized that all these always are considered to the target that is difficult to realize, the water-dispersion phase of at least a biodegradable polymkeric substance is provided, be used to prepare film and form composition, this biodegradable polymkeric substance comprises at least a stablizer, yet its content is not excessive enough.

The present invention relates to water dispersion and equal 30% moisture film at least at the preparation solid content and form application in the composition, this water dispersion is formed by being dispersed in water-dispersion Xiangli organic phase, and described disperse phase comprises with respect to its solid content:

-94 to 99.5% organic phase (being on dry matter basis), it comprise at least a biodegradable polymkeric substance and

-0.5 to 6% at least a stablizer.

According to one embodiment of present invention, disperse phase is used for preparing solid content and waits 30% moisture film formation composition at least, and described disperse phase comprises with respect to its solid content:

-95 to 99.5% organic phase (being on dry matter basis), it comprise at least a biodegradable polymkeric substance and

-0.5 to 5% at least a stablizer.

Preferably, the present invention relates to water-dispersion and be used to prepare moisture film formation composition mutually, said composition has solid content and equals 35% (weight at least, be on dry matter basis), preferably in 45 to 99.9% (weight, be on dry matter basis) between, more preferably between 50 to 75% (weight is on dry matter basis).

The water-dispersion that applicant company provides has high-caliber biodegradable polymkeric substance mutually, is used to prepare the moisture film with high solid content and forms composition.

As above-mentioned defined, the solid content of aqueous pigment compositions commonly used is mainly provided by pigment, is replenished by tackiness agent, and the assistant agent share seldom.

Therefore, applicant company has overcome technology prejudice, according to this prejudice, water-dispersion phase from least a biodegradable polymkeric substance, prepare a kind of stable moisture film and form composition (no matter it is aqueous pigment compositions or aqueous adhesive composition), increase the solid content that film forms composition simultaneously, be practically impossible.

This is that the water dispersion of at least a biodegradable polymkeric substance has too high viscosity usually because according to the state of the art.

Because this reason has the aqueous pigment compositions of high solid content, promoted the strong interaction between pigment and the water-dispersion phase component.

Strong interaction may cause phase inversion, can destroy the homogeneity of color compositions and significantly increase viscosity.

The increase of viscosity is so huge, to such an extent as to make color compositions be unsuitable for preparing coating, moisture film forms pigment preparation or water-miscible paint.

For avoiding the phase inversion phenomenon, applicant company finds, must add stablizer in film forms the water-dispersion mutually of composition, and the amount of adding must suitably promptly be to be not over-drastic enough, is unlikely to damage dispersive organic phase particulate and well flocculates.

These stablizers can be the protein of natural or modification, starch, and polyvinyl alcohol, rubber, vegetable fibre matter and polyol are used alone or as a mixture.

These stablizers can also be the emulsifying agents of polymkeric substance, for example, the copolymerzation with cross-linking object (for example Pemulen , Noveon company sells) that comprises the alkyl methacrylate of high-molecular weight the cross-linked acrylic acid based copolymer, particularly vinylformic acid of hydrophobic oligomers and 10 to 30 carbon atoms.

Stablizer selective hydrolysis degree is at 60 to 98% polyvinyl alcohol; more preferably degree of hydrolysis is 70 to 90%; Sudan Gum-arabic; xanthan gum or treated starch or vegetable fibre matter; preferred esterification (methylates; carboxymethylation, acetylize or alkyl succinylation) or the starch or the vegetable fibre matter of etherificate (cationization or hydroxyl third desaturation).

These stablizers are present between 0.5 to 6% (dry weight) of solid content that ratio in the water-dispersion mutually is described water-dispersion phase, are preferably between 1 to 5.5% (dry weight), more preferably between 0.5 to 5% (dry weight), most preferably are between 1.5 to 5% (dry weights).

Can add 94 to 99.5% in described water-dispersion Xiangli, preferred 95 to 99% biodegradable polymkeric substance, thus obtain preparing the high-level water-dispersion phase that moisture film of the present invention forms composition.

Because applicant company finds that when stabiliser content was less than 0.5%, water-dispersion did not have enough stability mutually, to form the tackiness agent of composition as the moisture film with high solid content.

When the content of stablizer greater than 5% the time, too high content can damage preparation example such as coating, moisture film forms pigment preparation, required flocculating properties when water-borne coatings or aqueous adhesive composition.

Moisture film of the present invention forms composition, and feature also is, no matter in its component still be its preparation method, preferably use did not contain the water-dispersion phase of volatile organic solvent.

This moisture film forms composition owing to do not contain volatile organic matter, and the content of volatile organic compound (VOC) is no more than described water-dispersion phase component, that is to say, equals 15000ppm at most, preferably smaller or equal to 5000ppm, is more preferably less than and equals 1000ppm.

Therefore, moisture film of the present invention forms the shortcoming of composition without any the prior art preparation, therefore avoided toxicity, additional cost, the complicacy of preparation process is (as being provided with the anti-gas-leak device, blast protection device or be used to reclaim the device of volatile organic solvent, and inevitable environmental influence) etc. problem.

Applicant company finds that it is not a limiting factor that water-dispersion selects not contain volatile organic solvent mutually, and this discovery is significant.

Therefore, the known method of each class of the water-dispersion phase of at least a biodegradable polymkeric substance of above-described preparation may be suitable.

This is because by the selection of known stabilizers known proportion, can plant the biodegradable polymkeric substance that adds any kind of mutually in described water-dispersion.

The water-dispersion phase of applicant company suggestion comprises that at least a content is the stablizer of 0.5 to 6% (weight) of the dry weight of described water-dispersion phase, and the moisture film that has high solid content in order to preparation forms composition.

Preferably, two class water-dispersion phases are selected in the suggestion of applicant company, and it is not by containing volatile organic matter, and the organic phase that is dispersed in the water-dispersion Xiangli is formed, and prepare the moisture film with high solid content of the present invention and form composition.

The first kind is the water-dispersion phase of applicant company exploitation, and their organic phase comprises:

-at least a viscosity reducing agent, its solubility parameter is between 15 to 28 (J.cm-3) 0.5, preferably between 16 to 23 (J.cm-3) 0.5, more preferably between 18 to 21 (J.cm-3) 0.5, its hydrogen bonding parameter δ H is between 3.5 to 15 (J.cm-3) 0.5, preferably between 4 to 13 (J.cm-3) 0.5, more preferably between 5 to 10 (J.cm-3) 0.5 and

-at least a biodegradable polymkeric substance, the weight ratio of polymkeric substance/viscosity reducing agent are between 99.8/0.2 to 60/40, preferably between 97/3 to 70/30, more preferably between 92/8 to 70/30.

These water dispersions have the low viscous high solid content that also has simultaneously, so they are very suitable for the preparation with color compositions of high solid content of the present invention.

Applicant company suggestion viscosity reducing agent is selected from acid esters, ethanol (or ethoxylate), preferred organic acid one, two or triester, carbonic acid and phosphoric acid, sugar or polyol.

Also can be selected from ether (or ethoxylate), sugar, polyol (particularly Isosorbide), ethylene glycol or phenylic acid, the ether-ether of ethylene glycol or epoxidised, tri-glyceride finish.

Also can select the product of the biodegradable or compost of food grade.

In addition, preferably, viscosity reducing agent has the boiling point greater than 130 ℃, is preferably greater than 150 ℃, and more preferably greater than 200 ℃, the heavy solvent class is particularly suitable for their function.

Especially, the viscosity reducing agent of applicant company suggestion is selected from three triacetins, the diacetic acid Coronex, two butyric acid Coronexs, isodigeranyl butyric acid Coronex, two sad Coronexs, Isosorbide dimethyl ether, ethyl lactate, n-Butyl lactate, tributyl citrate, triethyl citrate, 2 (2-ethylhexyl) adipate, diisobutyl adipate, dibutyl phthalate, propionic acid, tributyrin, different tributyrin, ethylene glycol dibenzoate, dibenzoic diglycol laurate, two M-nitro benzoic acid propylene glycol esters, dibenzoic acid dipropylene glycol ester, the triglycol benzoate, Uniflex DBS, diisobutyl sebate, propylene carbonate, poly(oxyethylene glycol) 400, Polyethylene Glycol-600, molecular weight are about 500 caprolactone glycols, methyl ester, fat dibasic ester, succsinic acid and/or saccharic acid.

Biodegradable polymkeric substance is amorphous; be selected from the biodegradable polymkeric substance of following kind: poly-lactic acid ester (being PLA); polymalic acid ester (being PMA); polyhydroxyalkanoatefrom (being pHA); polycaprolactone (being PCL); polyesteramide (PEA); aliphatics copolyester (PBSA) and aliphatics-altogether-terephthalate copolyester (PBAT); with the height ethanoylization or by importing the fixed fat chain hydrophobic Mierocrystalline cellulose or starch; no matter above-mentioned substance is linear, side chain, crosslinked; dendritic or grafted is used alone or as a mixture with the form of homopolymer or heteropolymer.

Advantageously, biodegradable polymkeric substance is a heteropolymer, preferred two, three or tetrapolymer, monomer whose is a glycols, caprolactone or acid and be selected from D lactic acid, L lactic acid, oxyacetic acid, the tetramethyl-oxyacetic acid, oxysuccinic acid, propynoic acid, butyric acid, valeric acid, phthalic acid, terephthalic acid, succsinic acid, lipid acid, sebacic acid, caproic acid is sad, capric acid, dodecylic acid, tetradecanoic acid, the alcohol acid of hexadecanoic acid and octadecanoic acid.

The suggestion of applicant company, heteropolymer is by at least two kinds of monomer polymerizations, and first is a solid in room temperature like this, and second is liquid when this temperature.In this case, water dispersion is more suitable for the formation of film.

Biodegradable polymkeric substance can be unordered, mutual, end to end successive or block heteropolymer.

Applicant company does not advise using the polymkeric substance with strong crystallization ability in the water dispersion of preparation moisture film formation composition.

Therefore, the biodegradable polymkeric substance that is present in the described dispersion is preferably noncrystalline form, that is to say, is non-crystalline state or semi-crystalline state, preferred non-crystalline state.

And applicant company suggestion is applied on the assistant agent and/or after the drying, also need keeps it to be in non-crystalline state or semi-crystalline state on assistant agent at described polymkeric substance.

Among the present invention, comprise the polymkeric substance of 25% crystalline state at most by " non-crystalline state " of biodegradable polymer formation." semi-crystalline state " comprises the polymkeric substance of 60% crystalline state at most.

Biodegradable polymkeric substance that can selection functionization, preferably to aldehyde and fluorizated carboxylic acid, amine and alcohols carry out functionalization.

At last, the biodegradable polymkeric substance (the especially product G alastic of Galastic company  L68) of the biodegradable polymkeric substance (especially P﹠G's product Nodax ) of the amorphous or semi-crystalline state of applicant company discovery pHA class and PLA class is especially suitable.

Particularly use Nodax  mixture, its PLA and/or highly acetylated or complete hydrophobic starch by amorphous or semi-crystalline state is formed.

Stablizer must exist with a specific proportions, to prepare in the tackiness agent of water-dispersion phase that moisture film of the present invention forms composition.

This target realizes that by the step of following order it comprises:

1) under the temperature of the second-order transition temperature that substantially exceeds biodegradable polymkeric substance, melt biodegradable polymeric blends and viscosity reducing agent mixture, prepare the organic phase that is dispersed in the water-dispersion mutually, so that obtain the melting obtained mixture of homogeneous, the ratio of biodegradable polymkeric substance and viscosity reducing agent is between 99.8/0.2 and 60/40, between preferred 97/3 and 70/30, more preferably between 92/8 and 70/30

2) at least a stablizer is dissolved in the dispersive aqueous phase fully, make it content and be the water-dispersion phase solid content 0.5 to 6%, preferred 0.5 to 5%,

3) side by side and continuously import dispersion water and organic phase, with its dispersion, obtain the mixture of emulsifier unit thus, the flow that this two-phase imports is through adjusting in advance, so that the dispersive organic phase accounts for 80% (weight) of described water dispersion solid content at least, preferred at least 90% (weight), more preferably at least 95% (weight) and

4) reclaim the water dispersion that obtains thus.

Use emulsifier unit to prepare described water dispersion, this emulsifier unit (selling as French Emulbitume company's T r é gueux) comprising:

-turbomixer,

The device of-two cover dispersive organic phases and dispersion water, every suit comprises heat-insulated container, a volumetric pump and a row Heat insulated conduit.

This class device can be at barometric point and is prepared water dispersion under the flow of 100l/h at least, contact when in mixing tank, making organic phase identical with disperse water, on the one hand, be in molten state, want the dispersive organic phase to comprise biodegradable polymkeric substance and viscosity reducing agent, on the other hand, disperse water to comprise stablizer.

Directly extracted from microorganism mutually and purified by second kind of water-dispersion that the organic phase that is dispersed in dispersion water (not containing volatile organic matter) lining is formed, it can be used for preparing the moisture film with high solid content and forms composition.

Form preparation of compositions about moisture film of the present invention, applicant company finds, must adjust the purify natural particulate condition of biodegradable polymkeric substance, the content (particularly Protein content) that makes stablizer for the polymkeric substance dry weight 1 to 5% between, be preferably between 1 to 4%.

This is because applicant company finds that when the content of stablizer (particularly protein) was less than 1%, the water-dispersion of bacterial polymer did not have enough level of stability mutually usually, to form the tackiness agent of composition as the moisture film of high solid content.

When content greater than 5% the time, high-load stablizer (particularly protein) is harmful to flocculating properties, and this characteristic is for making coating, moisture film forms pigment preparation, water-borne coatings or aqueous adhesive composition institute are necessary.

The Protein content of natural particulate bacterial polymer can be adjusted with the known method of any person of ordinary skill in the field in purification step.

The purifying method of applicant company suggestion is used the method for clorox, this method can be regardless of the biomass of degrading under the situation of separating polyhydroxyalkanoatefrom, the protein that keeps an amount of stabilization of colloidal suspended substance simultaneously, this proteinic amount are enough to promote natural particulate flocculation.

Preferably, the solid content of the water-dispersion phase of preparation moisture film formation composition is between 25 and 70% (weight), preferably between 35 and 70% (weight), more preferably between 45 and 65% (weight).

Be dispersed in the water-dispersion phase of forming the disperse water Xiangli by organic phase, it is characterized in that, its solid content is between 25 and 70% (weight), preferably between 35 and 70% (weight), more preferably between 45 and 65% (weight), and when this solid content be comprise at least a biodegradable polymkeric substance organic phase 95 to 99.5% between, and the content of at least a stablizer is 0.5 between 5% the time, this water-dispersion is particularly suitable for preparing moisture film of the present invention mutually and forms composition.

Moisture film of the present invention forms the preparation of compositions method, is that component mixture is undertaken by the known method of any person of ordinary skill in the field, hereinafter will illustrate.

The moisture film that obtains thus forms composition and is very suitable for preparing water-soluble color compositions, coating for example, and moisture film forms pigment preparation or paint, or aqueous adhesive composition.

Preferably, water-soluble color compositions of the present invention has and equals 30% solid content at least, and it comprises:

-belong to the water-dispersion phase of the biodegradable polymkeric substance of an above-mentioned class, as tackiness agent,

-at least a assistant agent,

-at least a pigment.

Preferably, aqueous adhesive composition of the present invention has and equals 30% solid content at least, and it comprises:

-belong to the water-dispersion phase of the biodegradable polymkeric substance of an above-mentioned class, as primary binder,

-glycan is preferably water soluble, preferably from natural and treated starch and natural and modified-cellulose, and as inferior tackiness agent,

-at least a assistant agent,

-choosing ground, at least a pigment.

Particularly, aqueous adhesive composition of the present invention can be used as be used to label, screw mandrel, corrugated cardboard, pack make, the tackiness agent of wallpaper, felt paper (comprising the assembling of felt paper), liner, non-braided material, cigarette etc.

It can also process composition as textiles, and coating is used for the interim composition that protects, the anti-composition of scribbling, dressing composition or water-proofing composition.

This aqueous adhesive composition is dilute with water easily, and amount of dilution is decided on its mode that is applied to the surface or the raw material of need of coating or applying glue.

Embodiment

Other characteristic and advantage of the present invention will be understood by following non-limiting example.

Embodiment 1

Prepare three kinds of aqueous pigment compositions mutually from three kinds of water-dispersions that do not contain volatile organic solvent with high solid content.

First kind of water-dispersion phase (disperse phase No.1) is by poly-lactic acid ester Galastic  L68 (Galactic company produces and sells) preparation, its molecular value is 68000 dalton, polydispersity index is 2.78, second-order transition temperature is 55 ℃, 34Pas when 2380Pas and 160 ℃ when complex viscosity is 130 ℃, degree of crystallinity is approximately 0%, and the D lactic acid content after the hydrolysis is 12.4%.

Use diethyl ethylene glycol bisthioglycolate benzo ester (Velsicol company sells, and commodity are called Benzoflex  2-45, and boiling point is 236 ℃) as the reagent that reduces this poly-lactic acid ester viscosity.

The stablizer of water is selected from polyvinyl alcohol (Poval JP 18Y is sold by TVP Japan Vam company), and its degree of hydrolysis is 88 1, and viscosity is 25 2mPas, and purity is greater than 94%.

The preparation method of water-soluble poly-lactic acid ester disperse phase comprises following steps:

1) the dispersive organic phase is wanted in preparation:

Galastic  L68 type PLA particle 1300g and Benzoflex 2-45 (ratio of biodegradable polymkeric substance/viscosity reductive agent is 65/35) 700g are added in the electric heating vessel, and temperature remains on 160 ℃.

After waiting the complete fusion of these products, stirring makes mixture even.

2) preparation dispersive water:

At 80 ℃, 135g is dispersed in the 3200g deionized water mechanical stirring with polyvinyl alcohol (Poval JP 18Y).

3) preparation water-dispersion phase.

Place laboratory emulsifier unit (selling) to carry out emulsification in the mixture that needs dispersive organic phase and dispersive water by Emulbitume.

Organic phase and water are transferred in their heat-insulated containers separately, and temperature is controlled at 160 ℃ and 60 ℃ respectively.

In closed circuit, start volumetric pump, adjusting corresponding temperature and flow, thereby the content of the dispersion organic phase that obtains be the water-dispersion phase solid content 97.2%, the content of stablizer be the water-dispersion phase solid content 2.8%.

Open valve, with organic phase and water simultaneously, transfer to Atomix C turbomixer continuously, speed is 8900 rev/mins.

Prepare second kind according to above-mentioned identical method subsequently, the third and the 4th kind of water-based poly-lactic acid ester disperse phase, difference is:

-to disperse phase No.2, add 85g polyvinyl alcohol (Poval JP 18Y), 3.5g xanthan gum (Sigma Aldrich) and the compacting of applicant company, make and the 32g acetylated potato starch (A.N.=1.8) of sale as stablizer,

-to disperse phase No.3, add 85g polyvinyl alcohol (Poval JP 18Y), 7g xanthan gum (Sigma Aldrich) and the compacting of applicant company, make and the 64g acetylated potato starch (A.N.=1.8) of sale as stablizer,

-to disperse phase No.4; use the 325g diisobutyl adipate; 85g polyvinyl alcohol (Poval JP18Y); the 64g acetylated potato starch (A.N.=1.8) of 7g xanthan gum (Sigma Aldrich) and the compacting of applicant company, manufacturing and sale is as stablizer; substitute 700g viscosity reducing agent (Benzoflex 2-45);, and add 1N sodium hydroxide, pH is adjusted to 5.0.

The preparation condition of former state repeating dispersion phase No.1 prepares other two kinds contrast disperse phase, and different is to first kind, only to add 18g Poval JP 18Y (that is, stablizer solid content/SC is 0.4%); To second kind, add 375g Poval JP 18Y (that is, stablizer solid content/SC is 7%).Opposite with other 4 kinds of preparations, find these two kinds of disperse phase, both can not obtain, also can not the stable water-dispersion phase of preparation greater than several hours (rapid flocculation).

Shown in the following Table I of characteristic that four kinds of stable water-dispersions have mutually.

Table I

	Disperse phase 1	Disperse phase 2	Disperse phase 3	Disperse phase 4
					Solid content (%)	59.7	59.5	57.5	46.1
Organic phase solid content/solid content (%)	97.2	97.5	96.4	94.6
					Stablizer solid content/solid content (%)	2.8	2.5	3.6	5.4
pH	2.2	2.2	2.2	5.0
					Median size (μ m)	5.1	5.0	5.4	4.2

Brookfield viscosity in the time of 20 ℃ (mPas)	390	495	870	3200
					2 months later flocculation phenomenons	Lack	Lack	Lack	Lack

Prepare three kinds of aqueous pigment compositions of the present invention, 5000 rev/mins of Dispermat mechanical stirring 2 minutes, the No.1 that 8g deionized water and 35g are had the characteristic shown in the table 1, one of 2 or No. 3 disperse phase, slowly add solid content to and be in the water-based paint suspension liquid of 75% 16g lime carbonate (selling Setacarb  board by Omya company).

The aqueous pigment compositions that obtains by disperse phase 1,2 and 3 is called PC1, PC2 and PC3.Their main characteristic is provided by following Table II.

Table II

	PC1	PC2	PC3
				Solid content (%)	55.7	55.6	54.5
pH	6.4	6.6	6.5
				Brookfield viscosity in the time of 20 ℃ (mPas)	2500	7200	4500

Obtain stable water-soluble color compositions thus, do not observe flocculation, waddingization or phase inversion phenomenon.And these color compositions demonstrate good film forming properties and viscosity, are applicable to that the preparation moisture film forms pigment preparation.

In addition, No.2 begins by disperse phase, prepares new water-dispersion phase (disperse phase No.5 is to No.9), is about to hydrogenated glucose syrups (the trade(brand)name Polysorb  70/12/12 of increasing amount, sell by applicant company) mix by simple, add among the disperse phase No.2 as additional stabilizers.

Syrupy amount is diluted to 59.5% of solid content, it is joined among the 100g disperse phase No.2, disperse phase No.2 also is 59.5% of a solid content, and disperse phase No.5 is presented at down respectively among Table III and the IV to the film forming characteristics of No.9 20 ℃ and 95 ℃.

Table III

Disperse phase number	2	5	6	7	8	9
							Solid content is 59.5% Polysorb 70/12/12 (g)	0	1	2	5	10	15
Stablizer solid content/solid content (%)	2.5	3.5	4.5	7.5	12.5	17.5

Organic phase solid content/solid content (%)

97.5

96.5

95.5

92.5

87.5

82.5

Table IV

Disperse phase number	2	5	6	7	8	9
							Film forming characteristics in the time of 20 ℃ (clinging power of dry film)	Fabulous	Good	Good	Difference	Difference	Extreme difference
Film forming characteristics in the time of 95 ℃ (clinging power of dry film) (baking)	Fabulous	Good	Good	Difference	Difference	Extreme difference
							Water resisting property (95 ℃ time obtain film)	Fabulous	Fabulous	Good	Difference	Difference	Extreme difference
Outward appearance in the time of 20 ℃	Transparent	Slight haze	Slight haze	Muddy	Muddy	Muddy
							Outward appearance in the time of 95 ℃	Transparent	Utmost point slight haze	Slight haze	Muddy	Muddy	Muddy
Flocculation in the time of 20 ℃	Good	Good	Good	Not enough	Not enough	Not enough
							Flocculation in the time of 95 ℃	Good	Good	Good	Not enough	Not enough	Not enough

In fact, clearly, stabiliser content the solid content of water-dispersion phase 0.5 and 5% between, be able to:

-obtain stable water-dispersion phase (even flocculation or solidification phenomenon do not take place) some months after, and, its have water tolerance that the film forming properties of getting well becomes reconciled and

-preparation has the color compositions of good film forming properties, and said composition has them simultaneously and is used to prepare the suitable rheological characteristics that moisture film forms pigment preparation.

Embodiment 2

Be used for the water-soluble color compositions of the formulation for coating material of external coating (EC)/single layer type with disperse phase 4 preparation of embodiment 1, and it compared with the formulation for coating material for preparing with following synthetic water disperse phase:

1) " external coating (EC)/individual layer " formulation for coating material of disperse phase No.4 (the coating 1 of the present invention) preparation of usefulness embodiment 1

Under 700 rev/mins Rayneri mechanical stirring, following material is added continuously in one hour:

-1115g solid content is the water-based paint suspension liquid (brand Setacarb  80OG is sold by Omya company) of 76% lime carbonate,

-328g solid content is 66% kaolinic water-based paint suspension liquid (brand Supragloss  95 is sold by Imerys company),

-340g disperse phase No.4,

-126g solid content is the softening agent (sold by applicant company, commodity are called Neosorb  70/70) of 70% polyol class,

-12g dispersion agent (brand Dispex  N40 is sold by Ciba company),

-61g solid content is the thickening material (brand Finnfix  10 is sold by Noviant company) of 10% carboxymethyl cellulose class,

-10g solid content be 56% insoluble reagent (brand is Urecoll  S, is sold by BASF AG) and

-8g solid content is 48% slipping agent (brand Nopcote  C 104 is sold by Nopco PaperTechnology company).

The solid content of color compositions is adjusted to 60% with deionized water.The pH value of aforesaid color compositions is adjusted to 9 with sodium hydroxide.

Under 100 rev/mins of conditions, in the time of 30 ℃, record to such an extent that viscosity is 620mPas with Brookfield viscometer.

Under the shearing rate of 40000s-1, record to such an extent that viscosity is 42mPas with Hercules velocimeter (by the DV-10 type of Kaltec Scientific company production).

2) control control " external coating (EC)/individual layer " formulation for coating material for preparing by synthetic water disperse phase (coating 2):

The preparation of control color compositions is with above-mentioned the same, and still the synthetic water disperse phase with styrene-butadiene type (brand Dow  950 is sold solid content 50%, pH5.7, brookfield viscosity 98mPas by Dow company) substitutes disperse phase No.4.

The solid content of color compositions is adjusted to 60% with deionized water.The pH value of this color compositions is adjusted to 9 with sodium hydroxide.

Under 100 rev/mins of conditions, in the time of 30 ℃, record to such an extent that viscosity is 580mPas with Brookfield viscometer.

Under the shearing rate of 40000s-1, record to such an extent that viscosity is 24mPas with Hercules velocimeter (by the DV-10 type of Kaltec Scientific company production).

3) coating of overlay paper and physical measurement

With the gram number of these two kinds of color compositions, be coated on the body paper with Helicoater2000 type coating device (selling) by Dixon company with 39g/m2.Carry out coating with vane-type (scraper plate coating method).

The amount that comprises the color compositions coating of disperse phase No.4 composition is 19g/m2, and the amount that comprises the color compositions coating of synthetic water disperse phase composition is 18g/m2.

Subsequently, with paper with the laboratory with roller calender (RK 22HU type, by Ramisch company produce) calendering.

The calendering step is essential, so that the coated paper surface becomes smooth and gloss.The calendering condition is 2.5 crust and 1pass 120 ℃ the time.

Through the weather control chamber (23 ℃/50%RH) in the storage after, paper is analyzed, shown in the following Table V of its result:

Table V

	Coating 1 (according to the present invention)	Coating 2 (according to prior art)
			Whiteness (%)	82.3	81.4
Opaqueness (%)	92.1	90.7
			Planeness (ml/min)	25	26
Porosity (ml/min)	9	6
			Machine direction hardness (mN)	11	13

The paper that will comprise the paint coatings of disperse phase 4 of the present invention (coating 1), compare with the paper of the paint coatings that comprises synthetic water disperse phase (coating 2), its planeness, porosity is identical with hardness, with regard to whiteness and opaqueness, coating 1 has better effect.

Embodiment 3

The aqueous pigment compositions PC1 that is used to prepare moisture film formation pigment, obtain according to embodiment 1 compares with the adhesive formula of contrast.

Described contrast adhesive formula is prepared by following mixture, 5000 rev/mins of rotating speeds, 2 minutes time:

-16g solid content is 75% pigment suspension liquid (trade(brand)name Setacarb  85 OG are sold by Omya company),

-8g deionized water,

-35g solid content is 54%, and pH value 4.5, viscosity are the resin emulsion (trade(brand)name Rhodopass  A013P is sold by Rhodia company) of 6000mPas, are equivalent to by Polycizer W 260 plastifying vinyl acetate.The brookfield viscosity of this contrast adhesive formula in the time of 20 ℃ is 8500mPas.

The clinging power effect of the aqueous pigment compositions PC1 of embodiment 1 and control formula is tested according to FIPAGO and to be assessed, and wherein the development of tackiness agent is measured on the Strohlein instrument.

This testing principle is, tackiness agent is coated on the two pieces of paper, and wherein a piece of paper is placed on the mounting medium, and a piece of paper is attached on the hinge bar in addition, assesses the variation of the tear resistance of these two pieces of paper according to the time.

This two pieces of paper identical in quality, size 20cm * 6cm has following main characteristic:

-Ke number: 66g/m2

-Ke Bu: 19g/m2

-AFNOR porosity: 7.6 ml/min

-Nei cohesive force (Scott key): 550J/m2

Value 100 expression paper can not separate, and value 0 expression paper separates rapidly.

Coat 40g tackiness agent (PC1 or dummy) with every square metre of paper and test, the result of FIPAGO clinging power is by down shown in the Table VI:

Table VI

Clinging power:	10 seconds	30 seconds	50 seconds
				Tackiness agent color compositions of the present invention	2	36	The paper defiber
The contrast adhesive formula	24	82	The paper defiber

Clearly, tackiness agent color compositions of the present invention is compared with the contrast adhesive formula, though the onset of adhesion effect is slower, has shown good adhesion characteristic.

Embodiment 4

According to given two kinds of matt water-borne coatingss and two kinds of press polish water-borne coatingss of preparing in the following Table VII, styrene-acrylic resin binder resin (trade(brand)name Repolem  2423 wherein, solid content 50%, brookfield viscosity in the time of 20 ℃ is 10000mPas, the pH value is about 8, minimum film-forming temperature be+15 ℃, and glass fibrillation transition temperature is+18 ℃) complete in as one of the disperse phase No.1 of binder resin and No.2, replace etc. weight.

Table VII

Component (gram)	Matt paint	Press polish coating
			Deionized water	259.7	139.0
Cellulose thickener (Natrosol  Plus 430, Aquacon)	3.7	1.0
			Ammoniacal liquor (solid content 22%)	0.1	0.1
The polyurethane thickener of solid content 50% (Coatex  BR 100P.Coatex)	4.2	12.8
			The dispersion agent of solid content 40% (Coatex  P/90, Coatex)	2.4	4.9
Defoamer (Nopco 8034 , Henkel)	0.4	1.5
			The biocide of solid content 50% (Acticide  BX, Thor)	1.7	2.0
White pigment (titanium dioxide R960, DuPont)	77.8	222.6
			Calcium carbonate pigment (Durcal  S, Omya)	84.8	40.5
Calcium carbonate pigment (Durcal  2, Omya)	424.2	60.7
			Binder resin	84.9	458.1
Deionized water	50.9	55.9
			Flocculation agent (Texanol , Eastman)	4.3	0
Defoamer (Nopco 8034 , Henkel)	0.9	0.9
			Ammoniacal liquor (solid content 22%)	PH is about 8	PH is about 8

Add the component of coating successively according to the order of Table VII, use dispersion mixer (brand Dispermat  CV) to mix then, be used to prepare coating.

The characteristic of various tarnishes or press polish water-borne coatings is by down shown in the Table VIII.

Table VII

	Matt paint			Press polish coating
								Repolem 2423 contrasts	Disperse phase 1	Disperse phase 2	Repolem 2423 contrasts	Disperse phase 1	Disperse phase 2
Solid content (%)	63.8	63.8	63.8	57.4	57.4	57.4
							Brookfield viscosity (mPas)-initial after-7 days	9500 9700	11 100 15 000	8400 12 500	19 000 18 000	13 000 15 000	8900 13 000
PH-initial after-7 days	8.0 8.0	8.3 7.4	8.4 7.7	8.1 8.1	8.0 7.6	8.1 7.7
							Yield-point appears	Not	Be	Be	Not	Be	Be
The measured value of flow (mm) *	1	1	1	1	1	1
							Sag	Lack	Lack	Lack	Lack	Lack	Lack
The outward appearance of dry back coated membrane	Smooth, tarnish	Smooth, tarnish	Coarse slightly, tarnish	Smooth, glossy	Coarse slightly, less gloss	Coarse slightly, several tarnishes

Annotate: ^*=a pair of striped, space therebetween still can be distinguished, are unit measurement clearance distance with mm.

Clearly, in tarnish or press polish water-borne coatings prescription, disperse phase No.1 and No.2 can substitute nonbiodegradable synthetic resin adhesive (trade(brand)name Repolem  2423) fully, can not sacrifice its physical stability or fundamental characteristics.

Advantageously, opposite with contrast coating, comprise that the coating of disperse phase No.1 and No.2 has yield-point, this helps their application on assistant agent.

Embodiment 5

Prepare aqueous adhesive composition of the present invention mutually by the poly-lactic acid ester that does not contain organic solvent (commodity are called Galastic  L68) water-dispersion.

Obtain this water-dispersion phase by the condition described in the embodiment 1 (disperse phase No.5), comprise:

-deionized water: 40.86%

-polyvinyl alcohol Poval JP 18Y:1.07%

-xanthan gum: 0.07%

-poly-lactic acid ester Galastic  L68:46.40%

-dibenzoic acid dipropylene glycol ester: 5.80%

-vegetables oil methyl esters: 5.80%

This solid content is that the brookfield viscosity of 56% disperse phase is 650mPas.

The Zulkovsky starch (being sold trade(brand)name Dexylose  250 by applicant company) that 300g is dissolved in the cold water is distributed in the 700g deionized water, prepares this aqueous adhesive composition, and said composition can be as the tackiness agent of cigarette or liner.

Mechanical stirring is 30 minutes under the 1500rpm rotating speed, adds above-mentioned 300g water-dispersion phase then.

With sodium hydroxide solution the pH value is adjusted to 3 subsequently.

This obtains a kind of uniform tackiness agent, and its brookfield viscosity is 4200mPas, and solid content is 35.2%.

The clinging power of carrying out on FIPAGO equipment test shows, this can the height biological degradation and reproducible tackiness agent have the performance that well is used for the paper liner because only after 30 seconds, paper fibre has just separated.

Claims (13)

1. water dispersion equals 30% moisture film at least at the preparation solid content and forms application in the composition, and this water dispersion is formed by being dispersed in water-dispersion Xiangli organic phase, and described disperse phase comprises with respect to its solid content:

-94 to 99.5% organic phase (weight is on dry matter basis), it comprise at least a biodegradable polymkeric substance and

-0.5 to 6% at least a stablizer.

2. application as claimed in claim is characterized in that, said composition has solid content and equals 35% (weight at least, be on dry matter basis), preferably between 45 to 99.9% (weight is on dry matter basis), more preferably between 50 to 75% (weight is on dry matter basis).

3. application as claimed in claim 1 or 2 is characterized in that, it is aqueous pigment compositions or aqueous adhesive composition that this moisture film forms composition.

4. as arbitrary described application among the claim 1-3, it is characterized in that water-dispersion does not contain volatile organic matter mutually.

5. as arbitrary described application among the claim 1-4, it is characterized in that the organic phase of forming described water-dispersion phase comprises::

-at least a viscosity reducing agent, its solubility parameter is between 15 to 28 (J.cm-3) 0.5, preferably between 16 to 23 (J.cm-3) 0.5, more preferably between 18 to 21 (J.cm-3) 0.5, its hydrogen bonding parameter δ H is between 3.5 to 15 (J.cm-3) 0.5, preferably between 4 to 13 (J.cm-3) 0.5, more preferably between 5 to 10 (J.cm-3) 0.5 and

-at least a biodegradable polymkeric substance, the weight ratio of polymkeric substance/viscosity reducing agent are between 99.8/0.2 to 60/40, preferably between 97/3 to 70/30, more preferably between 92/8 to 70/30.

6. as arbitrary described application among the claim 1-4, it is characterized in that this water-dispersion is originated mutually and is bacterium, stabiliser content is between 1 and 5%, preferably between 1 and 4%.

7. as arbitrary described application among the claim 1-6; it is characterized in that; this water-dispersion comprises amorphous biodegradable polymkeric substance mutually; be preferably selected from and comprise the biodegradable polymkeric substance of following kind: poly-lactic acid ester (being PLA); polymalic acid ester (being PMA); polyhydroxyalkanoatefrom (being pHA); polycaprolactone (being PCL); polyesteramide (PEA); aliphatics copolyester (PBSA) and aliphatics-altogether-terephthalate copolyester (PBAT) and height ethanoylization or by importing the fixed fat chain hydrophobic Mierocrystalline cellulose or starch, above-mentioned substance; no matter it is linear; side chain, crosslinked, dendritic or grafting; form with homopolymer or heteropolymer is used alone or as a mixture.

8. as arbitrary described application among the claim 1-7, it is characterized in that stablizer is selected from protein natural or modification, starch, polyvinyl alcohol, rubber, vegetable fibre matter and polyol, above-mentioned substance is used alone or as a mixture.

9. as arbitrary described application among the claim 1-8, it is characterized in that the moisture film that obtains thus forms composition and is used to prepare pigment coating, moisture film forms pigment preparation and water-borne coatings.

10. as arbitrary described application among the claim 1-8, it is characterized in that, this moisture film forms composition and is used to prepare aqueous adhesive composition, particularly, as be used to label, screw mandrel, corrugated cardboard, pack make, the tackiness agent of wallpaper, felt paper (comprising the assembling of felt paper), liner, non-braided material, cigarette etc., and as textiles processing composition, coating, the composition that is used for interim protection, the anti-composition of scribbling, dressing composition or water-proofing composition.

11. the water-dispersion phase by the organic phase that is dispersed in the disperse water Xiangli is formed is characterized in that it has:

-solid content between 25 and 70% (weight), preferably between 35 and 70% (weight), more preferably between 45 and 65% (weight),

-with respect to its solid content, the organic phase of at least a biodegradable polymkeric substance, amount of dry matter is between 95 to 99.5% and at least a stablizer, and content is between 0.5 to 5%.

12. an aqueous pigment compositions is characterized in that, it comprises the described water-dispersion phase of claim 11.

13. an aqueous adhesive composition is characterized in that, it comprises the described water-dispersion phase of claim 11.