CN104962218A - Modified VAE emulsion formaldehyde-free adhesive and using method thereof - Google Patents
Modified VAE emulsion formaldehyde-free adhesive and using method thereof Download PDFInfo
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- CN104962218A CN104962218A CN201510377800.XA CN201510377800A CN104962218A CN 104962218 A CN104962218 A CN 104962218A CN 201510377800 A CN201510377800 A CN 201510377800A CN 104962218 A CN104962218 A CN 104962218A
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Abstract
The invention discloses modified VAE emulsion formaldehyde-free adhesive. The modified VAE emulsion formaldehyde-free adhesive comprises the following raw material components: VAE emulsion, rosin ester emulsion, isocyanate and light calcium carbonate. Conditions for pressing plywood by using the modified VAE emulsion formaldehyde-free adhesive disclosed by the invention are that the adhesive coating amount for a wood single plate is 260-280g/m<2>, the prepressing pressure is 1.0-1.5MPa, the prepressing time is 10-30min, the hot pressing temperature is 80-125 DEG C, the hot pressing pressure is 0.6-1.0MPa and the hot pressing time is 5-15min. The purpose of the invention is to provide the modified VAE emulsion formaldehyde-free adhesive which is environmental-friendly, formaldehyde-free, good in adhesiveness and high in waterproof performance, so as to overcome the disadvantages that formaldehyde emitted by adhesive in the prior art causes cancers and the adhesiveness and waterproof performance are not good.
Description
Technical field
The present invention relates to a kind of sizing agent and using method thereof, particularly a kind of modification VAE emulsion is without aldehyde sizing agent and using method thereof.
Background technology
China is the big country that uses of wood producing and woodwork in the world, along with the serious scarcity of the forest reserves, utilize solid wood board manufacture furniture decorating house not only resource-constrained and also cost high, therefore normally used sheet material is glued board.Glued board is that the log of certain specification is cut into veneer through revolving (plane), then drying, gluing, assembly, hot pressing form.Consider the production cost of glued board, it is the three urea formaldehyde glue (urea-formaldehyde resin, resol, melamine formaldehyde resin) of main material production that the current domestic wood-based plate sizing agent overwhelming majority uses with formaldehyde.Within 2012, " three-aldehyde glue " total amount is 1312.7 ten thousand t, accounts for 94.6% of wood-based plate sizing agent ultimate production.Owing to using " three-aldehyde glue " wood-based plate of producing to dissociate in the application aldehyde material, not only to environment, great harm is also created to HUMAN HEALTH, now become the main source that formaldehyde in indoor air is polluted.Formaldehyde was decided to be I class carcinogens in 2004 by international cancer research institution, and it was promoted as " carcinogens " by " suspect carcinogen " by the World Health Organization (WHO) releasing bulletin.There is research to point out between formaldehyde pollution and leukemia, to there is certain relation, children are affected even more serious.Although researchist is the burst size of methanal reducing " three-aldehyde glue " done a large amount of study on the modification, also achieve certain achievement in research, all less than the harm of stopping formaldehyde from root.Enhancing along with people's environmental consciousness and the pursuit to environmentfriendly products, the development and utilization of environment friendly aldehyde-free sizing agent just seems particularly important.
VAE emulsion is the abbreviation of vinyl acetate between to for plastic (VAC) and ethene (Ethylene) monomer emulsion multipolymer, with the VAE emulsion sizing agent that it coordinates viscosity increaser, thickening material, linking agent, weighting agent etc. to make for base-material, nontoxic, odorless, do not fire, not quick-fried, non-environmental-pollution, without Health hazard, without fire hazard, can be rated as Environment-friendlyadhesive adhesive.VAE emulsion and sizing agent thereof have that rate of drying is very fast, glued membrane snappiness is good, bonding action is high, water tolerance is better and acid and alkali-resistance, oil resistant, the excellent properties such as wear-resisting, ageing-resistant.Simultaneously, be easy to modification, can further improve performance, broadened application scope, be widely used in the multiple fields such as non-woven fabrics, static flocking, PVC film, construction and decoration, carpet backing, paper-plastic stick, Commercial goods labels, Furniture manufacture, food product pack, hot melt encapsulation, late effect sizing agent.Although VAE emulsion directly can be used as sizing agent, performance is not ideal enough, and application is restricted.
The information being disclosed in this background technology part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.
Summary of the invention
The object of the present invention is to provide a kind of environmental protection, formaldehydeless, viscosity good, modification VAE emulsion that water resistance is high without aldehyde sizing agent, thus overcomes the not good shortcoming of the carcinogenic and viscosity of sizing agent release formaldehyde in technology today, water resistance.
For achieving the above object, technical solution of the present invention is as follows:
A kind of modification VAE emulsion, without aldehyde sizing agent, comprises following component raw material: VAE emulsion, rosin ester emulsion, isocyanic ester, light calcium carbonate.
Preferably, following component raw material is comprised according to ratio of weight and number: VAE emulsion 85 ~ 95 parts, rosin ester emulsion 5 ~ 15 parts, isocyanic ester 3 ~ 5 parts, light calcium carbonate 6 ~ 10 parts.
Preferably, described isocyanic ester is monoisocyanates or vulcabond.
Preferably, described rosin ester emulsion prepares gained by following methods: 4:3 takes rosin ester and methylcarbonate (DMC) respectively in mass ratio, heating for dissolving is rosin ester liquid, reactor is put into after cooling, open and stir, and add dibutyl phthalate (DBP) and emulsifying agent alkylphenol polyoxyethylene, improve mixing speed to 1500 ~ 1800r/min and add stabiliser solution, continue stirring 20 ~ 30min, to obtain final product.
Preferably, the amount of the dibutyl phthalate added described in for add 4 ~ 6% of rosin ester liquid mass percent; Wherein said rosin ester liquid is rosin ester and methylcarbonate (DMC) mixture.
Preferably, described emulsifying agent add-on is 8 ~ 10% of the rosin ester liquid mass percent added; Wherein said rosin ester liquid is rosin ester and methylcarbonate (DMC) mixture.
Preferably, the amount adding stabiliser solution described in is 1 ~ 1.25 times of rosin ester liquid quality of adding; Wherein said rosin ester liquid is rosin ester and methylcarbonate (DMC) mixture.
Preferably, described stabiliser solution, for adding polyacrylamide (PAM) or polyvinyl alcohol (PVA) forms the solution that mass percent is 6 ~ 8%, is stabiliser solution.
Preferably, described rosin ester is the one in ester gum, hydrogenated rosin glyceride, pentalyn.
Modification VAE emulsion is without the preparation of aldehyde sizing agent: with VAE emulsion for base-material, adds rosin ester emulsion, isocyanic ester and light calcium carbonate in homogenizer, stirs immediately, discharging after 10 ~ 15min, obtains modification VAE emulsion without aldehyde sizing agent.Described modification VAE emulsion is prepared before use without aldehyde sizing agent again.
A kind of condition using modification VAE emulsion of the present invention to suppress glued board without aldehyde sizing agent is: wood single-plate Amount of spread is 260 ~ 280g/m
2, precompressed pressure is 1.0 ~ 1.5MPa, and squeeze time is 10 ~ 30min, and hot pressing temperature is 80 ~ 125 DEG C, and hot pressing pressure is 0.6 ~ 1.0MPa, and hot pressing time is 5 ~ 15min.
Compared with prior art, the present invention has following beneficial effect:
Modification VAE emulsion of the present invention without in aldehyde sizing agent with without aldehyde, nontoxic VAE emulsion for base-material, the methylcarbonate using environmental protection is solvent, prepare rosin ester emulsion with inversed phase emulsification at normal temperatures and pressures to carry out, environmental protection, green formula emulsion, be equipped with isocyanic ester, light calcium carbonate modification VAE emulsion, obtain a kind of without aldehyde, modification VAE emulsion sizing agent without toxic substance, safe green environmental protection; Sizing agent viscosity of the present invention is good, bonding strength is large, nontoxic pollution-free, without aldehyde, be a kind of sizing agent of environmental protection; Further use modification VAE sizing agent is suppressed the fast-growing Eucalyptus glued board obtained and is had that gummed degree is large, the characteristic of water-tolerant, and meet the technical indicator of GB/T 17657-2013II class plate completely, under normal temperature, immersion is not come unglued for more than 90 days.
Embodiment
Be described in detail below in conjunction with embodiment, but be to be understood that protection scope of the present invention not by the restriction of embodiment.
In the following example, VAE emulsion, isocyanic ester, light calcium carbonate are commercially available.
Embodiment 1
The preparation of rosin ester emulsion:
The preparation of stabiliser solution: take 22g polyvinyl alcohol (PVA), put into 350g distilled water, stirring and dissolving is even, for subsequent use;
In units of g, take required each component raw material: ester gum 200g, methylcarbonate (DMC) 150g, emulsifying agent alkylphenol polyoxyethylene 28g, dibutyl phthalate 17.5g, above-mentionedly prepare gained stabiliser solution 375g; Ester gum is mixed with methylcarbonate (DMC), heating for dissolving, obtain rosin ester liquid, then gained rosin ester liquid is naturally cooled to room temperature, put into the reactor with whipping appts, open and stir, mixing speed is 100 ~ 300r/min, adds dibutyl phthalate (DBP), emulsifying agent alkylphenol polyoxyethylene, stir 10min, mixing speed is adjusted to 1800r/min, in 10min, add stabiliser solution, continues to stir 25min, discharging, sealing, the solid content preparing gained rosin ester emulsion is about 30%, for subsequent use.
Modification VAE emulsion is without the preparation of aldehyde sizing agent:
In units of g, take required each component raw material: VAE emulsion 170g, the above-mentioned rosin ester emulsion 30g preparing gained, isocyanic ester (MDI) 6g, light calcium carbonate 12g, with VAE emulsion for homogenizer put into by base-material, add rosin ester emulsion, vulcabond (MDI) and light calcium carbonate again, stir immediately, discharging after 10 ~ 15min, obtain modification VAE emulsion without aldehyde sizing agent.
Modification VAE emulsion is without the use of aldehyde sizing agent:
By the above-mentioned modification VAE emulsion sizing agent prepared according to 260g/m
2amount of spread sizing agent is uniformly coated on Eucalyptus veneer, place three layers of veneer group embryo by decussate texture, precompressed pressure is 1.0MPa, squeeze time is 30min, and then plate embryo is sent into vulcanizing press, hot pressing temperature is 80 DEG C, hot pressing pressure is 1.0MPa, and hot pressing time is 5min.
Embodiment 2
The preparation of rosin ester emulsion:
The preparation of stabiliser solution: take 22g polyacrylamide (PAM), put into 280g distilled water, stirring and dissolving is even, for subsequent use;
In units of g, take required each component raw material: hydrogenated rosin glyceride 150g, methylcarbonate (DMC) 112.5g, emulsifying agent alkylphenol polyoxyethylene 24g, dibutyl phthalate 15g, above-mentionedly prepare gained stabiliser solution 302g, hydrogenated rosin glyceride is mixed with methylcarbonate (DMC), heating for dissolving, obtain rosin ester liquid, then gained rosin ester liquid is naturally cooled to room temperature, put into the reactor with whipping appts, open and stir, mixing speed is 100 ~ 300r/min, add dibutyl phthalate (DBP), emulsifying agent alkylphenol polyoxyethylene, stir 10min, mixing speed is adjusted to 1500r/min, stabiliser solution is added in 10min, continue to stir 20min, discharging, sealing, the solid content preparing gained rosin ester emulsion is about 30%, for subsequent use.
Modification VAE emulsion is without the preparation of aldehyde sizing agent:
In units of g, take required each component raw material: VAE emulsion 180g, the above-mentioned rosin ester emulsion 20g preparing gained, monoisocyanates (TDI) 8g, light calcium carbonate 16g, with VAE emulsion for homogenizer put into by base-material, add rosin ester emulsion, monoisocyanates (TDI) and light calcium carbonate again, stir immediately, discharging after 10 ~ 15min, obtain modification VAE emulsion without aldehyde sizing agent.
Modification VAE emulsion is without the use of aldehyde sizing agent:
By the above-mentioned modification VAE emulsion sizing agent prepared according to 270g/m
2amount of spread sizing agent is uniformly coated on Eucalyptus veneer, place three layers of veneer group embryo by decussate texture, precompressed pressure is 1.5MPa, squeeze time is 10min, and then plate embryo is sent into vulcanizing press, hot pressing temperature is 125 DEG C, hot pressing pressure is 0.6MPa, and hot pressing time is 15min.
Embodiment 3
The preparation of rosin ester emulsion:
The preparation of stabiliser solution: take 4g polyvinyl alcohol (PVA), put into 55g distilled water, stirring and dissolving is even, for subsequent use;
In units of g, take required each component raw material: ester gum 28g, methylcarbonate (DMC) 21g, emulsifying agent alkylphenol polyoxyethylene 5g, dibutyl phthalate 2g, above-mentionedly prepare gained stabiliser solution 59g, ester gum is mixed with methylcarbonate (DMC), heating for dissolving, obtain rosin ester liquid, then gained rosin ester liquid is naturally cooled to room temperature, put into the reactor with whipping appts, open and stir, mixing speed is 100 ~ 300r/min, add dibutyl phthalate (DBP), emulsifying agent alkylphenol polyoxyethylene, stir 10min, mixing speed is adjusted to 1600r/min, stabiliser solution is added in 10min, continue to stir 20min, discharging, sealing, the solid content preparing gained rosin ester emulsion is about 30%, for subsequent use.
Modification VAE emulsion is without the preparation of aldehyde sizing agent:
In units of g, take required each component raw material: VAE emulsion 90g, the above-mentioned rosin ester emulsion 10g preparing gained, isocyanic ester (MDI) 4g, light calcium carbonate 8g, with VAE emulsion for homogenizer put into by base-material, add rosin ester emulsion, vulcabond (MDI) and light calcium carbonate again, stir immediately, discharging after 10 ~ 15min, obtain modification VAE emulsion without aldehyde sizing agent.
Modification VAE emulsion is without the use of aldehyde sizing agent:
By the above-mentioned modification VAE emulsion sizing agent prepared according to 270g/m
2amount of spread sizing agent is uniformly coated on Eucalyptus veneer, place three layers of veneer group embryo by decussate texture, precompressed pressure is 1.5MPa, squeeze time is 10min, and then plate embryo is sent into vulcanizing press, hot pressing temperature is 125 DEG C, hot pressing pressure is 0.6MPa, and hot pressing time is 8min.
Embodiment 4
The preparation of rosin ester emulsion:
The preparation of stabiliser solution: take 32.5g polyacrylamide (PAM), put into 405g distilled water, stirring and dissolving is even, for subsequent use;
In units of g, take required each component raw material: pentalyn 200g, methylcarbonate (DMC) 150g, emulsifying agent alkylphenol polyoxyethylene 35g, dibutyl phthalate 14g, above-mentionedly prepare gained stabiliser solution 437.5g, pentalyn is mixed with methylcarbonate (DMC), heating for dissolving, obtain rosin ester liquid, then gained rosin ester liquid is naturally cooled to room temperature, put into the reactor with whipping appts, open and stir, mixing speed is 100 ~ 300r/min, add dibutyl phthalate (DBP), emulsifying agent alkylphenol polyoxyethylene, stir 10min, mixing speed is adjusted to 1650r/min, stabiliser solution is added in 10min, continue to stir 30min, discharging, sealing, the solid content preparing gained rosin ester emulsion is about 30%, for subsequent use.
Modification VAE emulsion is without the preparation of aldehyde sizing agent:
In units of g, take required each component raw material: VAE emulsion 190g, the above-mentioned rosin ester emulsion 10g preparing gained, vulcabond (MDI) 10g, light calcium carbonate 20g, with VAE emulsion for homogenizer put into by base-material, add rosin ester emulsion, vulcabond (MDI) and light calcium carbonate again, stir immediately, discharging after 10 ~ 15min, obtain modification VAE emulsion without aldehyde sizing agent.
Modification VAE emulsion is without the use of aldehyde sizing agent:
By the above-mentioned modification VAE emulsion sizing agent prepared according to 280g/m
2amount of spread sizing agent is uniformly coated on Eucalyptus veneer, place three layers of veneer group embryo by decussate texture, precompressed pressure is 1.25MPa, squeeze time is 20min, and then plate embryo is sent into vulcanizing press, hot pressing temperature is 100 DEG C, hot pressing pressure is 0.8MPa, and hot pressing time is 10min.
The present invention prepares gained modification VAE without aldehyde sizing agent, isocyanic ester is used in sizing agent formula, utilize height unsaturated group isocyanate group (-NCO) in isocyanic ester both can form strong chemical bonds with the active site (hydroxyl) on timber, improve the gluing power of sizing agent and plank, can be cross-linked with VAE emulsion molecular chain or rosin ester emulsion again, strengthen the force of cohesion of sizing agent molecule, improve its water tolerance, thus increase wet tenacity; And the isocyanic ester in sizing agent formula can solidify well in the raw material that moisture content is more; Isocyanic ester uses after composite, reacts finally generate carbamate, urea and carbonic acid gas with the water in composite raw material and the hydroxyl in sheet material, water, and unharmful substance remains.
The aforementioned description to concrete exemplary of the present invention is to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present invention and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present invention and various different selection and change.Scope of the present invention is intended to limited by claims and equivalents thereof.
Claims (10)
1. modification VAE emulsion is without an aldehyde sizing agent, it is characterized in that, comprises following component raw material: VAE emulsion, rosin ester emulsion, isocyanic ester, light calcium carbonate.
2. according to claim 1 without aldehyde sizing agent, it is characterized in that, comprise following component raw material according to ratio of weight and number: VAE emulsion 85 ~ 95 parts, rosin ester emulsion 5 ~ 15 parts, isocyanic ester 3 ~ 5 parts, light calcium carbonate 6 ~ 10 parts.
3. according to claim 1 without aldehyde sizing agent, it is characterized in that: described isocyanic ester is monoisocyanates or vulcabond.
4. according to claim 1 without aldehyde sizing agent, it is characterized in that, described rosin ester emulsion prepares gained by following methods: 4:3 takes rosin ester and methylcarbonate (DMC) respectively in mass ratio, reactor is put into after heating for dissolving, open and stir, and add dibutyl phthalate (DBP) and emulsifying agent alkylphenol polyoxyethylene, improve mixing speed to 1500 ~ 1800r/min and add stabiliser solution, continue stirring 20 ~ 30min, to obtain final product.
5., according to claim 4 without aldehyde sizing agent, it is characterized in that: described in the amount of dibutyl phthalate that adds for add 4 ~ 6% of rosin ester mass percent.
6. according to claim 4 without aldehyde sizing agent, it is characterized in that: described emulsifying agent add-on is 8 ~ 10% of the rosin ester mass percent added.
7., according to claim 4 without aldehyde sizing agent, it is characterized in that: described in add stabiliser solution amount be 1 ~ 1.25 times of rosin ester quality of adding.
8. according to claim 4 without aldehyde sizing agent, it is characterized in that: described stabiliser solution, for adding polyacrylamide (PAM) or polyvinyl alcohol (PVA) forms the solution that mass percent is 6 ~ 8%, is stabiliser solution.
9. according to claim 4 without aldehyde sizing agent, it is characterized in that: described rosin ester is the one in ester gum, hydrogenated rosin glyceride, pentalyn.
10. use modification VAE emulsion as claimed in claim 1 without an aldehyde sizing agent compacting glued board, it is characterized in that: wood single-plate Amount of spread is 260 ~ 280g/m
2, precompressed pressure is 1.0 ~ 1.5MPa, and squeeze time is 10 ~ 30min, and hot pressing temperature is 80 ~ 125 DEG C, and hot pressing pressure is 0.6 ~ 1.0MPa, and hot pressing time is 5 ~ 15min.
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| CN105907336A (en) * | 2016-06-15 | 2016-08-31 | 梁绍勇 | Chemical material synthesized aldehyde-free glue and preparing method thereof |
| CN106166771A (en) * | 2016-07-18 | 2016-11-30 | 中南林业科技大学 | A kind of manufacture method of Vitex chinensis Mill. sham wood |
| CN106634701A (en) * | 2015-11-02 | 2017-05-10 | 上海昊誉化工有限公司 | Aqueous environmental protection adhesive with characteristics of wide use and water resistance |
| CN106868491A (en) * | 2016-12-26 | 2017-06-20 | 安徽宝恒新材料科技有限公司 | A kind of method for strengthening steel surface snearing performance |
| CN107523239A (en) * | 2017-08-16 | 2017-12-29 | 华威粘结材料（上海）股份有限公司 | It is a kind of to be used to paste water-base cement of triamine plate surface layer of PVC and preparation method thereof |
| CN108546529A (en) * | 2018-03-27 | 2018-09-18 | 安徽宝润环保节能建材有限公司 | A kind of method that cross-linking method is modified the viscous glutinous agent of VAE lotions preparation |
| CN110423577A (en) * | 2019-08-12 | 2019-11-08 | 四川顶立胶业有限公司 | Open compressed wood hide glue of overlength and preparation method thereof |
| CN114213999A (en) * | 2021-12-13 | 2022-03-22 | 云南正邦科技有限公司 | Water-based formaldehyde-free adhesive |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106634701A (en) * | 2015-11-02 | 2017-05-10 | 上海昊誉化工有限公司 | Aqueous environmental protection adhesive with characteristics of wide use and water resistance |
| CN105907336A (en) * | 2016-06-15 | 2016-08-31 | 梁绍勇 | Chemical material synthesized aldehyde-free glue and preparing method thereof |
| CN106166771A (en) * | 2016-07-18 | 2016-11-30 | 中南林业科技大学 | A kind of manufacture method of Vitex chinensis Mill. sham wood |
| CN106868491A (en) * | 2016-12-26 | 2017-06-20 | 安徽宝恒新材料科技有限公司 | A kind of method for strengthening steel surface snearing performance |
| CN106868491B (en) * | 2016-12-26 | 2019-02-01 | 安徽宝恒新材料科技有限公司 | A method of enhancing steel surface snearing performance |
| CN107523239A (en) * | 2017-08-16 | 2017-12-29 | 华威粘结材料（上海）股份有限公司 | It is a kind of to be used to paste water-base cement of triamine plate surface layer of PVC and preparation method thereof |
| CN108546529A (en) * | 2018-03-27 | 2018-09-18 | 安徽宝润环保节能建材有限公司 | A kind of method that cross-linking method is modified the viscous glutinous agent of VAE lotions preparation |
| CN110423577A (en) * | 2019-08-12 | 2019-11-08 | 四川顶立胶业有限公司 | Open compressed wood hide glue of overlength and preparation method thereof |
| CN114213999A (en) * | 2021-12-13 | 2022-03-22 | 云南正邦科技有限公司 | Water-based formaldehyde-free adhesive |
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