CN105176462A - Preparation method of low-formaldehyde-release cellulose-based urea-formaldehyde resin adhesive - Google Patents

Preparation method of low-formaldehyde-release cellulose-based urea-formaldehyde resin adhesive Download PDF

Info

Publication number
CN105176462A
CN105176462A CN201510727630.3A CN201510727630A CN105176462A CN 105176462 A CN105176462 A CN 105176462A CN 201510727630 A CN201510727630 A CN 201510727630A CN 105176462 A CN105176462 A CN 105176462A
Authority
CN
China
Prior art keywords
parts
formaldehyde
urea
reactant
cellulose
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510727630.3A
Other languages
Chinese (zh)
Inventor
陈科
Original Assignee
陈科
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 陈科 filed Critical 陈科
Priority to CN201510727630.3A priority Critical patent/CN105176462A/en
Publication of CN105176462A publication Critical patent/CN105176462A/en
Pending legal-status Critical Current

Links

Abstract

The invention provides a preparation method of a urea-formaldehyde resin adhesive, particularly relates to the preparation method of the cellulose-based urea-formaldehyde resin adhesive, and belongs to the technical field of adhesives. The preparation method includes the following steps of evenly mixing formaldehyde, cellulose and basic catalysts, adding the mixture in a reaction container, conducting reactions to obtain reactant I, adding urea, oxidized corn starch glue, propylene glycol, pentaerythritol, sodium borate, ammonium ferrous sulfate, glucamylase and water, conducting even mixing, regulation pH, conducting heating for reactions, conducting cooling to obtain reactant II, regulating pH of the reactant II through ammonia water, adding titanium dioxide particles, and conducting even stirring. Cellulose serves as a base material for preparing the adhesive, and therefore the advantage that performance of the adhesive is improved is achieved, and formaldehyde release of the adhesive is reduced.

Description

A kind of preparation method of cellulose base urea-formaldehyde resin adhesive of low formaldehyde emission
Technical field
The invention provides a kind of preparation method of urea-formaldehyde resin adhesive, particularly relate to a kind of preparation method of urea-formaldehyde resin adhesive of cellulose base, belong to field of adhesive technology.
Background technology
Urea-formaldehyde resin adhesive (Urea-FormaldehydeResinAdhesives): be urea and formaldehyde under catalyzer (alkalescence or an acidic catalyst) acts on, the initial stage urea-formaldehyde resin of polycondensation; Under solidifying agent or promoter effect, form insoluble, not molten resin in latter stage.China starts suitability for industrialized production in nineteen fifty-seven, within 1962, becomes the main adhesive of plywood production, has become the main glue kind of China's Wood-based Panel Production at present.Application Areas includes: bonding, coating of wood adhesive, textiles, paper, musical instrument etc. etc.
The characteristic of urea-formaldehyde resin adhesive includes (1) due to containing a large amount of methylols and amide group, can be water-soluble, has good bonding property; (2) can room temperature or heat more than 100 DEG C solidify very soon; (3) compared with PF, cured glue layer, without color, does not pollute goods; (4) Joint strength is higher than animal and plant glue; (5) toxicity is less, but can release irritating formaldehyde during solidification; (6) easy to manufacture, low price; (7) photostabilization is good, more ageing-resistant; (8) good manufacturability, easy to use; (9) fragility is large, and solidification process easily produces internal stress and causes be full of cracks; (10) water tolerance and Joint strength are lower than Phenol aldehyde resin.
Subject matter includes: free formaldehyde discharges, water tolerance is bad, easily aging.
Mierocrystalline cellulose is a kind of aromatic polymer compound be present in vegetable fibre, and its content can account for 50% of timber, has the effect strengthening cell walls and binder fibre in plant tissue.At occurring in nature, cellulosic reserves are only second to Mierocrystalline cellulose, and all regenerate with the speed of 50,000,000,000 t every year.Pulp and paper industry will isolate about 1.4 hundred million t Mierocrystalline celluloses every year from plant, obtains the Mierocrystalline cellulose byproduct of about 5,000 ten thousand t simultaneously.But up to now, the Mierocrystalline cellulose more than 95% is still directly arranged people's rivers with " black liquor " form or is burnt after concentrating, and is seldom utilized effectively.Along with crisis of resource and the mankind are to the enhancing day by day of environmental protection consciousness; the waste resource how effectively fully utilizing this natural reproducible of Mierocrystalline cellulose is mentioned strategic height consideration by many countries; research and development Mierocrystalline cellulose and cellulose compound become useful Industrial products; as: the coupling agent of rubber, strengthening agent; the dispersion agent of dyestuff; the viscosity-depression agent of drilling mud; sweetening agent of industrial gaseous waste etc.; no matter from the angle of protection of the environment, still utilize the consideration of waste resource to be all one and there is good social effect and the problem of economic worth.
Summary of the invention
The object of the invention is: the urea-formaldehyde resin adhesive that a kind of low formaldehyde emission is provided, adopt following technical scheme:
A preparation method for the cellulose base urea-formaldehyde resin adhesive of low formaldehyde emission, comprises the steps:
1st step, by weight, after 60 ~ 80 parts, formaldehyde, Mierocrystalline cellulose 30 ~ 40 parts, basic catalyst 5 ~ 10 parts are mixed, add in reaction vessel, at 60 ~ 70 DEG C, react 40 ~ 60min, obtain reactant I;
2nd step, in reactant I, add 70 ~ 90 parts, urea, 15 ~ 20 parts, oxidised maize starch glue, propylene glycol 20 ~ 30 parts, tetramethylolmethane 5 ~ 10 parts, Sodium Tetraborate 5 ~ 10 parts, ferrous ammonium sulphate 4 ~ 8 parts, glucoamylase 3 ~ 6 parts by weight, 30 ~ 40 parts, water, mix, with sulphur acid for adjusting pH to 5.0 ~ 6.0 that mass concentration is 1% ~ 5%, be heated to 50 ~ 60 DEG C, react 60 ~ 90 minutes, let cool, obtain reactant II;
3rd step, regulate pH to 7.5 ~ 8.5 of reaction II with ammoniacal liquor, then add titanium dioxide granule 5 ~ 10 parts, stir.
Preferably, described Mierocrystalline cellulose refers to the one in sulfate cellulose, salt acid cellulose, oxidation cuprammonium Mierocrystalline cellulose, Periodic acid Mierocrystalline cellulose, soda cellulose, ethanol Mierocrystalline cellulose, sulphur Mierocrystalline cellulose, phenol fiber element or organic amine Mierocrystalline cellulose.
Preferred further, refer to soda cellulose.
Preferably, described basic catalyst refers to NaOH or KOH.
Preferably, described in the 3rd step, the mass concentration of ammoniacal liquor is 15 ~ 25%.
Beneficial effect
Present invention utilizes Mierocrystalline cellulose and prepare tackiness agent as base material, it has the advantage improving Adhensive performance, reduces the Form aldehyde release of tackiness agent.
Embodiment
Embodiment 1
1st step, formaldehyde 60Kg, Mierocrystalline cellulose 30Kg, basic catalyst 5Kg are mixed after, add in reaction vessel, at 60 DEG C, react 40min, obtain reactant I;
2nd step, in reactant I, add urea 70Kg, oxidised maize starch glue 15Kg, propylene glycol 20Kg, tetramethylolmethane 5Kg, Sodium Tetraborate 5Kg, ferrous ammonium sulphate 4Kg, glucoamylase 3Kg, water 30Kg, mix, with the sulphur acid for adjusting pH to 5.0 that mass concentration is 1%, be heated to 50 DEG C, react 60 minutes, let cool, obtain reactant II;
3rd step, regulate the pH to 7.5 of reaction II with ammoniacal liquor, then add titanium dioxide granule 5Kg, stir.
Mierocrystalline cellulose is soda cellulose.Basic catalyst refers to NaOH.The mass concentration of ammoniacal liquor is 15%.
Embodiment 2
1st step, formaldehyde 80Kg, Mierocrystalline cellulose 40Kg, basic catalyst 10Kg are mixed after, add in reaction vessel, at 70 DEG C, react 60min, obtain reactant I;
2nd step, in reactant I, add urea 90Kg, oxidised maize starch glue 20Kg, propylene glycol 30Kg, tetramethylolmethane 10Kg, Sodium Tetraborate 10Kg, ferrous ammonium sulphate 8Kg, glucoamylase 6Kg, water 40Kg, mix, with the sulphur acid for adjusting pH to 6.0 that mass concentration is 5%, be heated to 60 DEG C, react 90 minutes, let cool, obtain reactant II;
3rd step, regulate the pH to 8.5 of reaction II with ammoniacal liquor, then add titanium dioxide granule 10Kg, stir.
Mierocrystalline cellulose is soda cellulose.Basic catalyst refers to NaOH.The mass concentration of ammoniacal liquor is 25%.
Embodiment 3
1st step, formaldehyde 70Kg, Mierocrystalline cellulose 35Kg, basic catalyst 7Kg are mixed after, add in reaction vessel, at 65 DEG C, react 50min, obtain reactant I;
2nd step, in reactant 1, add urea 80Kg, oxidised maize starch glue 17Kg, propylene glycol 25Kg, tetramethylolmethane 7Kg, Sodium Tetraborate 7Kg, ferrous ammonium sulphate 6Kg, glucoamylase 5Kg, water 35Kg, mix, with the sulphur acid for adjusting pH to 5.5 that mass concentration is 4%, be heated to 55 DEG C, react 70 minutes, let cool, obtain reactant II;
3rd step, regulate the pH to 8.0 of reaction II with ammoniacal liquor, then add titanium dioxide granule 6Kg, stir.
Mierocrystalline cellulose is soda cellulose.Basic catalyst refers to NaOH.The mass concentration of ammoniacal liquor is 20%.
Performance test
The urea-formaldehyde resin adhesive that above embodiment prepares is made a service test, and with commercially available common urea-formaldehyde resin adhesive in contrast.Free formaldehyde detects according to GB/T14074.16-93, the detection of glued board detects after the glued board room temperature of compacting is placed 5 ~ 7 days again, bonding strength is according to I class glued board test in GB/T9846-2004 " glued board " method, namely in boiling water, boil 3h by fast detection method, the result recorded is multiplied by coefficient 0.9.
Embodiment 1 Embodiment 2 Embodiment 3 Reference examples
Solid content % 48.2 49.1 47.6 48.4
Free formaldehyde % 0.11 0.10 0.08 0.34
Bonding strength MPa 1.43 1.45 1.51 1.30

Claims (1)

1. a preparation method for the cellulose base urea-formaldehyde resin adhesive of low formaldehyde emission, is characterized in that, comprise the steps:
1st step, by weight, after 60 ~ 80 parts, formaldehyde, Mierocrystalline cellulose 30 ~ 40 parts, basic catalyst 5 ~ 10 parts are mixed, add in reaction vessel, at 60 ~ 70 DEG C, react 40 ~ 60min, obtain reactant I;
2nd step, in reactant I, add 70 ~ 90 parts, urea, 15 ~ 20 parts, oxidised maize starch glue, propylene glycol 20 ~ 30 parts, tetramethylolmethane 5 ~ 10 parts, Sodium Tetraborate 5 ~ 10 parts, ferrous ammonium sulphate 4 ~ 8 parts, glucoamylase 3 ~ 6 parts by weight, 30 ~ 40 parts, water, mix, with sulphur acid for adjusting pH to 5.0 ~ 6.0 that mass concentration is 1% ~ 5%, be heated to 50 ~ 60 DEG C, react 60 ~ 90 minutes, let cool, obtain reactant II;
3rd step, regulate pH to 7.5 ~ 8.5 of reaction II with ammoniacal liquor, then add titanium dioxide granule 5 ~ 10 parts, stir, titanium dioxide granule 5Kg can be added again, stir.
CN201510727630.3A 2015-10-28 2015-10-28 Preparation method of low-formaldehyde-release cellulose-based urea-formaldehyde resin adhesive Pending CN105176462A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510727630.3A CN105176462A (en) 2015-10-28 2015-10-28 Preparation method of low-formaldehyde-release cellulose-based urea-formaldehyde resin adhesive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510727630.3A CN105176462A (en) 2015-10-28 2015-10-28 Preparation method of low-formaldehyde-release cellulose-based urea-formaldehyde resin adhesive

Publications (1)

Publication Number Publication Date
CN105176462A true CN105176462A (en) 2015-12-23

Family

ID=54898908

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510727630.3A Pending CN105176462A (en) 2015-10-28 2015-10-28 Preparation method of low-formaldehyde-release cellulose-based urea-formaldehyde resin adhesive

Country Status (1)

Country Link
CN (1) CN105176462A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108192544A (en) * 2017-12-24 2018-06-22 北京林业大学 A kind of modifying nanometer cellulose low molar ratio urea-formaldehyde resin adhesive and preparation method thereof
CN110358151A (en) * 2019-07-17 2019-10-22 安吉艾格赛思生物科技有限公司 A kind of bamboo and wood waste biomass cellulose method of comprehensive utilization

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108192544A (en) * 2017-12-24 2018-06-22 北京林业大学 A kind of modifying nanometer cellulose low molar ratio urea-formaldehyde resin adhesive and preparation method thereof
CN108192544B (en) * 2017-12-24 2020-11-06 北京林业大学 Nano-cellulose modified low-molar-ratio urea-formaldehyde resin adhesive and preparation method thereof
CN110358151A (en) * 2019-07-17 2019-10-22 安吉艾格赛思生物科技有限公司 A kind of bamboo and wood waste biomass cellulose method of comprehensive utilization

Similar Documents

Publication Publication Date Title
CN100551649C (en) The preparation method of E0 level plywood
CN103725233B (en) Preparation method of lignin-based urea-formaldehyde resin adhesive with low formaldehyde release
CN102604573A (en) E0-grade melamine modified urea-formaldehyde resin adhesive, and preparation method and application thereof
CN102086257B (en) Environment-friendly urea resin for laminating plywoods from high water-content veneers and preparation and application thereof
CN1884332B (en) Urea-formaldehyde resin and its preparation method
CN101565492B (en) Low toxic and environment-friendly urea-formaldehyde resin and preparation method thereof
CN104087217B (en) The preparation method of a kind of straw ethanol by product methylolation and composite wood sizing agent
CN103254842A (en) Modified starch wood adhesive, and preparation method and application thereof
CN102911356A (en) Bio-based water-soluble polymer solution, and preparation method and application thereof
CN102775946B (en) MDF(Medium-density fiber)-E1-level urea-formaldehyde resin adhesive
CN102604021A (en) Method for synthesizing urea-formaldehyde resin containing micro free formaldehyde for E0-level artificial boards
CN105176462A (en) Preparation method of low-formaldehyde-release cellulose-based urea-formaldehyde resin adhesive
CN108531116B (en) Sulfate lignin modified urea-formaldehyde resin adhesive and preparation method thereof
CN103804619B (en) Xylogen-phenol-urea-formaldehyde condensation copolymerization resin tackiness agent and preparation method
CN104212122B (en) The additive of a kind of resol, preparation method and application
CN100354386C (en) Biomass-base artifical plate wooden adhesive without formaldehyde indoor and production thereof
CN106883800A (en) A kind of Resin adhesive and preparation method thereof
CN101565594A (en) High-performance urea-formaldehyde glue adhesive for fibreboard
CN108130022A (en) For the adhesive of artificial board of straw and the preparation method of artificial board of straw
CN103320081B (en) High-molecular composite adhesive, and preparation method and application thereof
CN104212123A (en) Composite alkaline phenolic resin curing agent, preparation method and application
CN105273150A (en) Preparation method of urea resin used for biological plate base material
CN103333651A (en) Hyperbranched resin adhesive with low formaldehyde release rate as well as preparation method and application of hyperbranched resin adhesive
CN104513640A (en) Preparation method of urea formaldehyde glue
CN102229696A (en) Production method for phenol formaldehyde resin adhesive for bamboo recombined material

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20151223

WD01 Invention patent application deemed withdrawn after publication