SE543251C2 - Waterborne adhesive comprising crosslinkable microfibrillated cellulose - Google Patents
Waterborne adhesive comprising crosslinkable microfibrillated celluloseInfo
- Publication number
- SE543251C2 SE543251C2 SE1850727A SE1850727A SE543251C2 SE 543251 C2 SE543251 C2 SE 543251C2 SE 1850727 A SE1850727 A SE 1850727A SE 1850727 A SE1850727 A SE 1850727A SE 543251 C2 SE543251 C2 SE 543251C2
- Authority
- SE
- Sweden
- Prior art keywords
- mfc
- cellulose
- waterborne adhesive
- crosslinkable
- waterborne
- Prior art date
Links
- 229920002678 cellulose Polymers 0.000 title claims abstract description 40
- 239000001913 cellulose Substances 0.000 title claims abstract description 40
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 32
- 239000000853 adhesive Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000004132 cross linking Methods 0.000 claims description 4
- 239000003125 aqueous solvent Substances 0.000 claims description 3
- 239000003431 cross linking reagent Substances 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000000123 paper Substances 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 229920002472 Starch Polymers 0.000 claims description 2
- 159000000000 sodium salts Chemical class 0.000 claims description 2
- 239000008107 starch Substances 0.000 claims description 2
- 235000019698 starch Nutrition 0.000 claims description 2
- 239000011111 cardboard Substances 0.000 claims 1
- 239000011256 inorganic filler Substances 0.000 claims 1
- 229910003475 inorganic filler Inorganic materials 0.000 claims 1
- 239000000835 fiber Substances 0.000 description 13
- 229920003043 Cellulose fiber Polymers 0.000 description 6
- 210000001724 microfibril Anatomy 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000865 phosphorylative effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229920001131 Pulp (paper) Polymers 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 229920002488 Hemicellulose Polymers 0.000 description 2
- 229920002522 Wood fibre Polymers 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 206010061592 cardiac fibrillation Diseases 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000002600 fibrillogenic effect Effects 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- XHXFXVLFKHQFAL-UHFFFAOYSA-N phosphoryl trichloride Chemical compound ClP(Cl)(Cl)=O XHXFXVLFKHQFAL-UHFFFAOYSA-N 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000002025 wood fiber Substances 0.000 description 2
- 241000609240 Ambelania acida Species 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 239000004971 Cross linker Substances 0.000 description 1
- 229920001410 Microfiber Polymers 0.000 description 1
- 229920001046 Nanocellulose Polymers 0.000 description 1
- 229920002201 Oxidized cellulose Polymers 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 125000003158 alcohol group Chemical group 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium group Chemical group [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 239000007900 aqueous suspension Substances 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 229910000388 diammonium phosphate Inorganic materials 0.000 description 1
- 235000019838 diammonium phosphate Nutrition 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- GDOPTJXRTPNYNR-UHFFFAOYSA-N methyl-cyclopentane Natural products CC1CCCC1 GDOPTJXRTPNYNR-UHFFFAOYSA-N 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000003658 microfiber Substances 0.000 description 1
- 108700005457 microfibrillar Proteins 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910000403 monosodium phosphate Inorganic materials 0.000 description 1
- 235000019799 monosodium phosphate Nutrition 0.000 description 1
- 239000002121 nanofiber Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229940107304 oxidized cellulose Drugs 0.000 description 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J101/00—Adhesives based on cellulose, modified cellulose, or cellulose derivatives
- C09J101/02—Cellulose; Modified cellulose
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/02—Cellulose; Modified cellulose
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J103/00—Adhesives based on starch, amylose or amylopectin or on their derivatives or degradation products
- C09J103/02—Starch; Degradation products thereof, e.g. dextrin
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
- D21H11/18—Highly hydrated, swollen or fibrillatable fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/03—Non-macromolecular organic compounds
- D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
- D21H17/10—Phosphorus-containing compounds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/18—Reinforcing agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
- D21H27/32—Multi-ply with materials applied between the sheets
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
- D21H27/32—Multi-ply with materials applied between the sheets
- D21H27/34—Continuous materials, e.g. filaments, sheets, nets
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
- D21H27/32—Multi-ply with materials applied between the sheets
- D21H27/34—Continuous materials, e.g. filaments, sheets, nets
- D21H27/36—Films made from synthetic macromolecular compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Composite Materials (AREA)
- Inorganic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The present invention relates to a waterborne adhesive comprising crosslinkable microfibrillated cellulose (MFC), as well as a method for adhering surfaces together using said adhesive.
Description
WATERBORNE ADHESIVE COMPRISING CROSSLINKABLE MICROFIBRILLATED CELLULOSE The present invention relates to a waterborne adhesive comprising crosslinkablegglfggfsgglïggfyf_l_a_lçggi__microfibrillated cellulose (šifMFC), as well as a method for adhering surfaces together using said adhesive.
BACKGROUND Waterborne adhesives are becoming increasingly popular, since they represent anenvironmentally friendly and economically viable alternative to solvent-based counterparts.However, the performance of current paper and/or wood waterborne adhesives based onnatural sources, such as starch or proteins, is reduced under moist conditions, due to theintrinsic water sensitivity of these natural sources, especially if no external crosslinker is added to the formulation.
On the other hand, waterborne adhesives with high wet performance usually consist oflatexes comprising fossil-fuel based monomers; this is the case for synthetic rubbers,polyacrylates and polyurethanes. It is therefore desirable to develop waterborne adhesives with improved performance in moist conditions and which are based on natural sources.
Microfibrillated cellulose (MFC) comprises partly or totally fibrillated cellulose or lignocellulosefibers. The liberated fibrils have a diameter less than 100 nm, whereas the actual fibrildiameter or particle size distribution and/or aspect ratio (length/width) depends on thesource and the manufacturing methods. The smallest fibril is called elementary fibril and hasa diameter of approximately 2-4 nm (see e.g. Chinga-Carrasco, G., Nanoscale researchletters 2011, 6:417), while it is common that the aggregated form of the elementary fibrils,also defined as microfibril, is the main product that is obtained when making MFC e.g. byusing an extended refining process or pressure-drop disintegration process (see Fengel, D.,Tappi J., March 1970, Vol 53, No. 3.). Depending on the source and the manufacturingprocess, the length of the fibrils can vary from around 1 to more than 10 micrometers. Acoarse MFC grade might contain a substantial fraction of fibrillated fibers, i.e. protrudingfibrils from the tracheid (cellulose fiber), with a certain amount of fibrils liberated from the tracheid (cellulose fiber).
There are different acronyms for MFC such as cellulose microfibrils, fibrillated cellulose,nanofibrillated cellulose, fibril aggregates, nanoscale cellulose fibrils, cellulose nanofibers,cellulose nanofibrils, cellulose microfibers, cellulose fibrils, microfibrillar cellulose, microfibril aggregrates and cellulose microfibril aggregates. MFC can also be characterized by various physical or physical-chemical properties such as large surface area or its ability to form a gel- like material at low solids (1-5 wt%) when dispersed in water.
MFC exhibits useful chemical and mechanical properties. Chemical surface modification ofMFC has the potential to improve the properties of MFC itself, e.g. mechanical strength and water absorbance and - in certain circumstances - elasticity/flexibility.
Patent publications in this field include US20090298976, US2017183820, JPH063398 andJP2017189164.
SUMMARY It has been verified that when an aqueous dispersion of crosslinkable (fe-:gfphosphorylatedàMFC is applied between two substrates and subsequently dried, it can deliver strong adhesiveproperties (strong bonding), providing that the drying occurs at a high enough temperatureto trigger crosslinking, i.e. above 60 °C. Moreover, since crosslinkable MFC can crosslink withpaper-based substrates and the like, it is expected that these types of adhesive exhibit highperformance even under moist conditions. Such properties are not achieved with conventional waterborne adhesives based on natural sources.
Thus, a good adhesion with good wet performances is achieved by adding a dispersioncomprising phosphorylated MFC as an adhesive and triggering the adhesion by heating. Thedispersion malwalso comprise;i__st;1§jg_h___ to further improve the adhesion;ewg-r-etareh _ So, in a first aspect the present invention relates to a waterborne adhesive comprisingcrosslinkable ghcssgflcnrjgšate-:i microfibrillated cellulose (E_;MFC) dispersed in an aqueoussolvent. Preferably, the waterborne adhesive does not comprise additional crosslinking agents.
In a second aspect, the present invention relates to method for adhering a first and a second surface together, said method comprising the steps of: a. applying a waterborne adhesive as defined herein, to at least one of said first or second surfaces; b. placing said first and second surfaces in contact with each other, such that the waterborne adhesive is located between said surfaces; c. treating said waterborne adhesive so as to provide crosslinking of thecrosslinkable MFC, thereby adhering said first and second surfaces together »wherein szzšfí crosslinkable IWEFC is phosnilcarvšzatefl rnicravfihrllâzatefl cellulose.
In a third aspect, the use of an aqueous dispersion of crosslinkable microfibrillated cellulose (_š?;_MFC) as a waterborne adhesive is provided. Further aspects of the invention are provided in the following text and in the dependent claims.
DETAILED DISCLOSURE In a first aspect, a waterborne adhesive is provided, which comprises crosslinkable _g_>_lja_gp_sp_lg_ç_r1y_l_gfi_ïï_gggç_l___microfibrillated__--cellulose (_E_>;_MFC) dispersed in an aqueous solvent.
Microfibrillated cellulose (MFC) or so called cellulose microfibrils (CMF) shall in the context ofthe present application mean a nano-scale cellulose particle fiber or fibril with at least onedimension less than 100 nm. MFC comprises partly or totally fibrillated cellulose orlignocellulose fibers. The cellulose fiber is preferably fibrillated to such an extent that the finalspecific surface area of the formed MFC is from about 1 to about 300 mZ/g, such as from 1 to200 mZ/g or more preferably 50-200 mZ/g when determined for a freeze-dried material withthe BET method.
Various methods exist to make MFC, such as single or multiple pass refining, pre-hydrolysisfollowed by refining or high shear disintegration or liberation of fibrils. One or several pre-treatment steps are usually required in order to make MFC manufacturing both energy-efficient and sustainable. The cellulose fibers of the pulp to be supplied may thus be pre-treated enzymatically or chemically, for example to reduce the quantity of hemicellulose orlignin. The cellulose fibers may be chemically modified before fibrillation, wherein thecellulose molecules contain functional groups other (or more) than found in the originalcellulose. Such groups include, among others, carboxymethyl, aldehyde and/or carboxylgroups (cellulose obtained by N-oxyl mediated oxidation, for example "TEMPO"), orquaternary ammonium (cationic cellulose). After being modified or oxidized in one of the above-described methods, it is easier to disintegrate the fibers into MFC or NFC.
The nanofibrillar cellulose may contain some hemicelluloses; the amount is dependent on theplant source. Mechanical disintegration of the pre-treated fibers, e.g. hydrolysed, pre-swelled, or oxidized cellulose raw material is carried out with suitable equipment such as arefiner, grinder, homogenizer, colloider, friction grinder, ultrasound sonicator, single - ortwin-screw extruder, fluidizer such as microfluidizer, macrofluidizer or fluidizer-type homogenizer. Depending on the MFC manufacturing method, the product might also contain fines, or nanocrystalline cellulose or e.g. other chemicals present in wood fibers or inpapermaking process. The product might also contain various amounts of micron size fiberparticles that have not been efficiently fibrillated.
MFC can be produced from wood cellulose fibers, both from hardwood or softwood fibers. Itcan also be made from microbial sources, agricultural fibers such as wheat straw pulp,bamboo, bagasse, or other non-wood fiber sources. It is preferably made from pulp includingpulp from virgin fiber, e.g. mechanical, chemical and/or thermomechanical pulps. It can also be made from broke or recycled paper.
The above described definition of MFC includes, but is not limited to, the proposed TAPPIstandard W13021 on cellulose nano or microfibril (CMF) defining a cellulose nanofibermaterial containing multiple elementary fibrils with both crystalline and amorphous regions, having a high aspect ratio with width of 5-30 nm and aspect ratio usually greater than 50.
Chemically-modified MFC comprising crosslinkable groups is “crosslinkable MFC”.Crosslinkable MFC forms bonds between the MFC fibrils upon crosslinking, e.g. by heat-treatment or pH treatment. jif_š_fi__e__ crosslinkable MFCfi Phosphorylatedmicrofibrillated cellulose (P-MFC)-f:af--dšal-á-ešæyde-mi-eifefi-br=iâlateë--Gešl-ulfif§e--{-E#äf~š>-'äš-ïá3-}§---e>f= v: ' hu» H» - å' g-»v 'Ff fli-š f L" íflflf"in. ...a- usxdixduyp _.. suv)- sx .
Phosphorylated microfibrillated cellulose (P-MFC) is typically obtained by reacting cellulosepulp fibers with a phosphorylating agent such as phosphoric acid, and subsequentlyfibrillating the fibers to P-MFC. One particular method involves providing a suspension ofcellulose pulp fibers in water, and phosphorylating the cellulose pulp fibers in said watersuspension with a phosphorylating agent, followed by fibrillation with methods common inthe art. Suitable phosphorylating agents include phosphoric acid, phosphorus pentaoxide,phosphorus oxychloride, diammonium hydrogen phosphate and sodium dihydrogen phosphate.
In the reaction to form P-MFC, alcohol functionalities (-OH) in the cellulose are converted tophosphate groups (-OPO32'). In this manner, crosslinkable functional groups (phosphate groups) are introduced to the pulp fibers or microfibrillated cellulose.
Typically, the P-MFC is in the form of its sodium salt. _».«-»»« wl- \'
Claims (11)
1. A waterborne adhesive characterized in that it comprisesing crosslinkablemicrofibrillated cellulose (MFC) dispersed in an aqueous solvent and starch, wherein thecrosslinkable MFC is phosphorylated microfibrillated cellulose (P-MFC).
2. The waterborne adhesive according to claim 1, wherein the crosslinkable MFC isphosphorylated microfibrillated cellulose (P-MFC), in the form of its sodium salt.
3. The waterborne adhesive according to any one of the preceding claims, comprisingmore than 25%, preferably more than 50%, such as e.g. more than 75% by dry weight crosslinkable MFC.
4. The waterborne adhesive according to any one of the preceding claims, comprising additional components, such as other MFC grades and/or inorganic fillers. 6:5.
5. The waterborne adhesive according to any one of the preceding claims, wherein the waterborne adhesive does not comprise additional crosslinking agents. 7:6.
6. A method for adhering a first and a second surface together, said methodcharacterized in the steps of: a. applying a waterborne adhesive as defined in any one of the preceding claims, to at least one of said first or second surfaces; b. placing said first and second surfaces in contact with each other, such that the waterborne adhesive is located between said surfaces; c. treating said waterborne adhesive so as to provide crosslinking of thecrosslinkable MFC, thereby adhering said first and second surfaces together,wherein said crosslinkable MFC is phosphorylated microfibrillated cellulose.
7. 877. The method according to claim §7, wherein said treatment in step c is heat treatment, suitably at a temperature of between 60 and 200 °C, preferably between 70 and 120 OC. fæß.
8. The method according to any one of claims Q7-8, wherein said treatment takes place for a time of between 10 and 180 minutes.
9. 14919. The method according to any one of claims 6_-8¥-9, wherein said first and/or saidsecond surfaces comprise or consist of cellulose-based materials such as e.g. paper, cardboard or wood. -1-1-.
10. The method according to any one of claims §¿2¥~1-9, wherein the waterborne adhesive used in step a. does not comprise additional crosslinking agents -1-2-.
11. Use of an aqueous dispersion of crosslinkable microfibrillated phosphorylated cellulose(fiMFC) according to any one of claims 1-56 as a waterborne adhesive.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1850727A SE543251C2 (en) | 2018-06-13 | 2018-06-13 | Waterborne adhesive comprising crosslinkable microfibrillated cellulose |
| JP2020568959A JP2021527153A (en) | 2018-06-13 | 2019-06-11 | Aqueous adhesive containing crosslinkable microfibrillated cellulose |
| PCT/IB2019/054840 WO2019239299A1 (en) | 2018-06-13 | 2019-06-11 | Waterborne adhesive comprising crosslinkable microfibrillated cellulose |
| EP19819018.3A EP3807373A4 (en) | 2018-06-13 | 2019-06-11 | Waterborne adhesive comprising crosslinkable microfibrillated cellulose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1850727A SE543251C2 (en) | 2018-06-13 | 2018-06-13 | Waterborne adhesive comprising crosslinkable microfibrillated cellulose |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE1850727A1 SE1850727A1 (en) | 2019-12-14 |
| SE543251C2 true SE543251C2 (en) | 2020-11-03 |
Family
ID=68842036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1850727A SE543251C2 (en) | 2018-06-13 | 2018-06-13 | Waterborne adhesive comprising crosslinkable microfibrillated cellulose |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3807373A4 (en) |
| JP (1) | JP2021527153A (en) |
| SE (1) | SE543251C2 (en) |
| WO (1) | WO2019239299A1 (en) |
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| SE543403C2 (en) | 2019-05-02 | 2021-01-05 | Stora Enso Oyj | Method for manufacturing laminated veneer lumer product |
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| GB1391725A (en) * | 1972-03-20 | 1975-04-23 | Kimberly Clark Co | Cellulose fibres |
| FR2716887B1 (en) * | 1994-03-01 | 1996-04-26 | Atochem Elf Sa | Polymers reinforced with cellulose microfibrils, latex, powders, films, corresponding rods, and their applications. |
| NO2496766T3 (en) * | 2009-11-06 | 2017-12-30 | ||
| JP5771033B2 (en) * | 2011-03-23 | 2015-08-26 | 日本製紙株式会社 | Multilayer paper manufacturing method |
| JP6559489B2 (en) * | 2015-07-16 | 2019-08-14 | 第一工業製薬株式会社 | Easy-release adhesive composition |
| US10875284B2 (en) * | 2015-09-10 | 2020-12-29 | University Of Maine System Board Of Trustees | Composite products of paper and cellulose nanofibrils and process of making |
| JP5950012B1 (en) * | 2015-09-17 | 2016-07-13 | 王子ホールディングス株式会社 | Method for producing fine fibrous cellulose-containing material |
| CA3019292C (en) * | 2016-03-31 | 2019-08-27 | Oji Holdings Corporation | Method for producing fibrous cellulose, and fibrous cellulose |
| FR3052101B1 (en) * | 2016-06-01 | 2019-05-10 | Centre Technique De L'industrie Des Papiers, Cartons Et Celluloses | FIXING METHOD AND SYSTEM OBTAINED BY SUCH A METHOD |
| WO2018012643A1 (en) * | 2016-07-15 | 2018-01-18 | スターライト工業株式会社 | Resin composition and method for producing same |
| JP6892807B2 (en) * | 2016-09-12 | 2021-06-23 | 株式会社Kri | Hydrophobic silica airgel particles aqueous dispersion as well as solid composites, insulation and sound absorbing materials |
| JP2018044097A (en) * | 2016-09-16 | 2018-03-22 | 第一工業製薬株式会社 | Adhesive composition |
| SE540343C2 (en) * | 2016-11-01 | 2018-07-17 | Stora Enso Oyj | A corrugated board comprising an adhesive comprising starch and fine microfibrillated cellulose |
| WO2018180277A1 (en) * | 2017-03-29 | 2018-10-04 | 第一工業製薬株式会社 | Aqueous coating liquid composition and coating film using same |
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2018
- 2018-06-13 SE SE1850727A patent/SE543251C2/en not_active IP Right Cessation
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2019
- 2019-06-11 WO PCT/IB2019/054840 patent/WO2019239299A1/en not_active Ceased
- 2019-06-11 EP EP19819018.3A patent/EP3807373A4/en not_active Withdrawn
- 2019-06-11 JP JP2020568959A patent/JP2021527153A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2021527153A (en) | 2021-10-11 |
| EP3807373A1 (en) | 2021-04-21 |
| EP3807373A4 (en) | 2022-03-23 |
| SE1850727A1 (en) | 2019-12-14 |
| WO2019239299A1 (en) | 2019-12-19 |
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| NUG | Patent has lapsed |