CN104673146A - Strong white latex - Google Patents

Abstract

The invention provides strong white latex. The strong white latex comprises the following components in parts by weight: 900 parts of polyvinyl acetate, 330 parts of vinyl acetate, 130 parts of polyvinyl alcohol, 85 parts of dibutyl phthalate, 30 parts diethylene glycol dibenzoate, 13 parts of octanol, 37 parts of isopropanol, 19 parts of allyl methacrylate, 8 parts of glycol dimethacrylate, 5 parts of toluene diisocynate, 41 parts of sodium bicarbonate, 1460 parts of water, 46 parts of an emulsifying agent, 8 parts of an initiator, 27 parts of hydroxymethyl acrylamide, 13 parts of waxy corn starch and 5 parts of sodium hypochlorite. The environmental-friendly performance of the strong white latex is fundamentally improved; meanwhile, the strong white latex has excellent representation on indexes of thermal stability, initial drying time, water resistance, bonding strength and curing time and has excellent overall performance.

Description

Powerful white latex

Technical field

The present invention relates to industrial chemicals technical field, particularly relate to a kind of powerful white latex.

Background technology

At present, the threshold industry of door and window is lower, and industry competition is more chaotic, for improving quality and the market competitiveness of product, needs constantly to improve.The energy-conservation wooden doors and windows of the top grade that external window of building engineering is widely used comprises: the large kind of pure Wood-door window, aluminium bag Wood-door window, wooden aluminium composite door and window three.And wooden aluminium composite door and window is because being heat insulated shape bar of aluminum alloy outside it, inner side is wooden decoration bar section, therefore more can adapt to southern rainy, high temperature, moist weather condition.The unreasonable structure of present domestic market processing and fabricating wood aluminium composite door and window, secondary processing is wanted in aluminium layering assembling, and in Wind-Pressure Resistance, resistance to air loss and sound insulation, the aspect of performance such as heat insulation neither be very desirable, still has the energy loss of considerable part.

In common high-grade timber window, the mode that ligneous piece wherein connects is as follows: in adjacent Liang Ge ligneous piece, one of them ligneous piece is provided with fluting, and another ligneous piece is provided with the buckle with slotted engagement, ligneous piece is connected and fixed with coordinating of buckle by fluting; Be that a step strengthens fixing firmness, also glue coating between adjacent ligneous piece usually; Timber window in use will bear the environmental attack gone from bad to worse at present, extends normal duration of service as far as possible, also will take into account the feature of environmental protection simultaneously, ensures that envoy person's is healthy, therefore has higher requirement to the glue be coated with between ligneous piece.Usual glue environmental protection degree in prior art, set time, the over-all propertieies such as cohesive strength are also difficult to the demand meeting production practice.

Through finding the retrieval of prior art, Chinese invention patent application 02109653.8 (publication date on November 19th, 2003) discloses a kind of powerful white latex, specifically by polyvinyl alcohol, sodium hydroxide, starch, hydrochloric acid, formaldehyde, urea, water forms, and this white glue with vinyl frost resistance is good, not easily precipitates, not stratified, technique is simple.But this glue contains formaldehyde and urea, and environmental-protecting performance is poor.

Chinese invention patent application 201310012677.2 (publication date on January 14th, 2013) discloses a kind of modified latex, this modified latex comprises vinyl acetate, vinylformic acid, butyl acrylate, initiator and emulsifying agent, obtained modified polyvinyl acetate emulsion adhesive capacity is large, can at room temperature film forming, cohesive strength is large, water-tolerant.The vinyl acetate toxicity that this glue adopts is large, inadequate environmental protection.

Chinese invention patent application 201410004735.1 (publication date: on April 16th, 2014) discloses a kind of environmental Protection type white latex, and described glue comprises: PVAC polyvinylalcohol, vinyl acetate VAC, vinylformic acid AA, acrylamide AM, ammonium persulphate, anionic emulsifier A-102, alkyl polyoxyethylene ether LCN-287 nonionic emulsifying agent; W-Gum, transparent powder, softening agent, diethylene glycol dibenzoate DEDB, sanitas KSG-201, sodium hydroxide and methyl alcohol; But this glue still employs the virose vinyl acetate of tool, and environmental-protecting performance is poor.

Meanwhile, the relevant glue disclosed in prior art over-all properties in result of use is also poor, and the method for there is no meets the related request of high-grade energy-conservation wooden doors and windows quality.

Summary of the invention

Provide hereinafter about brief overview of the present invention, to provide about the basic comprehension in some of the present invention.Should be appreciated that this general introduction is not summarize about exhaustive of the present invention.It is not that intention determines key of the present invention or integral part, and nor is it intended to limit the scope of the present invention.Its object is only provide some concept in simplified form, in this, as the preorder in greater detail discussed after a while.

The object of the invention is to overcome the deficiencies in the prior art, a kind of powerful white latex is provided; Glue environmental-protecting performance of the present invention is high, excellent combination property, can meet the related request of high-grade energy-conservation wooden doors and windows quality.

First aspect, the present invention relates to a kind of powerful white latex, and described powerful white latex is made up of each component of following parts by weight:

Polyvinyl acetate (PVA) 900,

Vinyl acetate 330,

Polyvinyl alcohol 130,

Dibutyl phthalate 85,

Diethylene glycol dibenzoate 30,

Octanol 13,

Virahol 37,

Allyl methacrylate(AMA) 19,

Ethyleneglycol dimethyacrylate 8,

Tolylene diisocyanate 5,

Sodium bicarbonate 41,

Water 1460,

Emulsifying agent 46,

Initiator 8,

N-methylolacrylamide 27,

Waxy corn starch 13,

Clorox 5.

Second aspect, the invention still further relates to a kind of preparation method of aforementioned powerful white latex, described method is made up of following steps:

Step one, under agitation condition, gets water and the polyvinyl alcohol of 50-73% weight percent, and mixing, is warmed up to 88-95 degree, polyvinyl alcohol is dissolved completely, and be incubated 1 hour under 70-80 degree, adjustment pH is 8-9, obtains solution A;

Step 2, get the emulsifying agent of 30-40% weight percent, under agitation condition, described emulsifying agent and remaining water are joined in solution A, slowly add the vinyl acetate of 40-50% weight percent and the initiator of 40-50% weight percent again, be warming up to 88-95 degree, insulation 0.3-0.5 hour; Be cooled to 60-70 degree; Slowly add remaining vinyl acetate and remaining initiator more afterwards; Be warming up to 88-95 degree, insulation 0.2-0.4 hour;

Step 3, adds emulsifying agent and the polyvinyl acetate (PVA) of 30-40% weight percent, is incubated 0.2-0.4 hour under 88-95 degree, be then cooled to 40-50 degree;

Step 4, under agitation condition, adds sodium bicarbonate, dibutyl phthalate, diethylene glycol dibenzoate, octanol, Virahol, mixes, obtain solution B;

Step 5, adds remaining emulsifying agent, allyl methacrylate(AMA), ethyleneglycol dimethyacrylate in solution B, tolylene diisocyanate, n-methylolacrylamide, waxy corn starch, clorox, mix, 40-50 degree insulation 0.1-0.3 hour, is cooled to room temperature, obtains final product.

Compared with existing, the present invention has following beneficial effect: in powerful white latex of the present invention, the content of vinyl acetate declines to a great extent, and without the need to using formaldehyde equal solvent, fundamentally improves the environmental-protecting performance of product; White glue with vinyl of the present invention is at thermal stability simultaneously, and just the dry time, water resistance, cohesive strength and set time etc., index had outstanding representation, and over-all properties is superior.

Embodiment

Embodiments of the invention are described below.The element described in one embodiment of the invention and feature can combine with the element shown in one or more other embodiment and feature.It should be noted that for purposes of clarity, in explanation, eliminate expression and the description of unrelated to the invention, parts known to persons of ordinary skill in the art and process.

Embodiment 1

The present embodiment relates to a kind of white glue with vinyl and preparation method thereof; White glue with vinyl is made up of each component of following parts by weight:

Polyvinyl acetate (PVA) 700,

Vinyl acetate 300,

Polyvinyl alcohol 120,

Dibutyl phthalate 60,

Diethylene glycol dibenzoate 20,

Octanol 10,

Virahol 30,

Allyl methacrylate(AMA) 10,

Ethyleneglycol dimethyacrylate 5,

Tolylene diisocyanate 3,

Sodium bicarbonate 35,

Water 1400,

Emulsifying agent 40, emulsifying agent is sodium oleate (i.e. sodium oleate);

Initiator 5, initiator is ammonium persulphate;

N-methylolacrylamide 20,

Waxy corn starch 10,

Clorox 2.

The each component related in the present embodiment all obtains by disclosed commercially available channel.In the present embodiment, preparation method's step of white glue with vinyl is as follows:

Step one, under agitation condition, gets water and the polyvinyl alcohol of 50-73% weight percent, and mixing, is warmed up to 88-95 degree, polyvinyl alcohol is dissolved completely, and be incubated 1 hour under 70-80 degree, adjustment pH is 8-9, obtains solution A;

Step 2, get the emulsifying agent of 30-40% weight percent, under agitation condition, described emulsifying agent and remaining water are joined in solution A, slowly add the vinyl acetate of 40-50% weight percent and the initiator of 40-50% weight percent again, be warming up to 88-95 degree, insulation 0.3-0.5 hour; Be cooled to 60-70 degree; Slowly add remaining vinyl acetate and remaining initiator more afterwards; Be warming up to 88-95 degree (DEG C), insulation 0.2-0.4 hour;

Step 3, adds emulsifying agent and the polyvinyl acetate (PVA) of 30-40% weight percent, is incubated 0.2-0.4 hour under 88-95 degree, be then cooled to 40-50 degree (DEG C);

Step 4, under agitation condition, adds sodium bicarbonate, dibutyl phthalate, diethylene glycol dibenzoate, octanol, Virahol, mixes, obtain solution B;

Step 5, remaining emulsifying agent is added, allyl methacrylate(AMA), ethyleneglycol dimethyacrylate in solution B, tolylene diisocyanate, n-methylolacrylamide, waxy corn starch, clorox, mix, 40-50 degree (DEG C) insulation 0.1-0.3 hour, is cooled to room temperature, obtains final product.

Embodiment 2

The present embodiment relates to a kind of powerful white latex, and the preparation method of white glue with vinyl is with reference to embodiment 1, and white glue with vinyl white glue with vinyl is made up of each component of following parts by weight:

Polyvinyl acetate (PVA) 1050,

Vinyl acetate 350,

Polyvinyl alcohol 145,

Dibutyl phthalate 100,

Diethylene glycol dibenzoate 40,

Octanol 15,

Virahol 45,

Allyl methacrylate(AMA) 25,

Ethyleneglycol dimethyacrylate 10,

Tolylene diisocyanate 7,

Sodium bicarbonate 50,

Water 1500,

Emulsifying agent 50, emulsifying agent is Sodium dodecylbenzene sulfonate;

Initiator 10, initiator is ammonium persulphate;

N-methylolacrylamide 32,

Waxy corn starch 15,

Clorox 7.

Embodiment 3

The present embodiment relates to a kind of powerful white latex, and the preparation method of white glue with vinyl is with reference to embodiment 1, and white glue with vinyl white glue with vinyl is made up of each component of following parts by weight:

Polyvinyl acetate (PVA) 800,

Vinyl acetate 315,

Polyvinyl alcohol 125,

Dibutyl phthalate 80,

Diethylene glycol dibenzoate 25,

Octanol 12,

Virahol 35,

Allyl methacrylate(AMA) 15,

Ethyleneglycol dimethyacrylate 7,

Tolylene diisocyanate 4,

Sodium bicarbonate 39,

Water 1450,

Emulsifying agent 45, emulsifying agent is Sodium dodecylbenzene sulfonate;

Initiator 6, initiator is Potassium Persulphate;

N-methylolacrylamide 25,

Waxy corn starch 12,

Clorox 4.

Embodiment 4

The present embodiment relates to a kind of powerful white latex, and the preparation method of white glue with vinyl is with reference to embodiment 1, and white glue with vinyl is made up of each component of following parts by weight:

Polyvinyl acetate (PVA) 950,

Vinyl acetate 335,

Polyvinyl alcohol 135,

Dibutyl phthalate 90,

Diethylene glycol dibenzoate 35,

Octanol 14,

Virahol 40,

Allyl methacrylate(AMA) 22,

Ethyleneglycol dimethyacrylate 9,

Tolylene diisocyanate 6,

Sodium bicarbonate 45,

Water 1480,

Emulsifying agent 48, emulsifying agent is Sodium dodecylbenzene sulfonate;

Initiator 9, initiator is Potassium Persulphate;

N-methylolacrylamide 29,

Waxy corn starch 14,

Clorox 6.

Embodiment 5

The present embodiment relates to a kind of powerful white latex, and the preparation method of powerful white latex is with reference to embodiment 1, and powerful white latex brute force is made up of each component of following parts by weight:

Polyvinyl acetate (PVA) 900,

Vinyl acetate 330,

Polyvinyl alcohol 130,

Dibutyl phthalate 85,

Diethylene glycol dibenzoate 30,

Octanol 13,

Virahol 37,

Allyl methacrylate(AMA) 19,

Ethyleneglycol dimethyacrylate 8,

Tolylene diisocyanate 5,

Sodium bicarbonate 41,

Water 1460,

Emulsifying agent 46, emulsifying agent is Sodium dodecylbenzene sulfonate;

Initiator 8, initiator is Potassium Persulphate;

N-methylolacrylamide 27,

Waxy corn starch 13,

Clorox 5.

Comparative example 1

In prior art, the customary preparation methods of white glue with vinyl comprises the steps: to get polyvinyl alcohol 300 parts, under agitation condition, adds Sodium dodecylbenzene sulfonate 40 parts, 800 parts, water, stirs 10-15 minute; Add vinyl acetate 450 parts, 10 parts of Potassium Persulphates, be incubated under 65-70 degree and wait basic disappearance of refluxing, be warmed up to 80-85 degree, add vinyl acetate 800 parts, 10 parts of Potassium Persulphates, be warmed up to 90-95 degree insulation 05-0.6 hour, be cooled to 50 degree, add dibutyl phthalate 50 parts, sodium bicarbonate 10 parts, stirs, cooling, obtains white glue with vinyl.

Implementation result

For verifying the implementation result of the present invention, carry out the test of following index:

1, environmental-protecting performance, the subjective feeling of production and user;

Whether 2, thermal stability determination: keep 6 days under 50-60 degree, observe and change, if appearance precipitates or gelatin phenomenon is more, then thermostability is poorer;

3, just dry timing: get ligneous piece, get 6g glue and be evenly coated in ligneous piece surface, observe its time of drying; Repeat, average for 5 times;

4, water tolerance measures: the ligneous piece of getting one group (2) same specification, 150g every square metre glue coating is pressed at the contact surface that each ligneous piece is corresponding, the specification of each contact surface is 100mm*30mm, afterwards by corresponding for the contact surface of Liang Ge ligneous piece superimposed compression, seasoning 12 hours, soak in 30-35 degree water, measure and come unglued the time; Repeat, average for 5 times;

5, cohesive strength measures: the ligneous piece of getting one group (2) same specification, 150g every square metre glue coating is pressed at the contact surface that each ligneous piece is corresponding, the specification of each contact surface is 100mm*30mm, afterwards by corresponding for the contact surface of Liang Ge ligneous piece superimposed compression, closed assembly time is no more than 10 minutes, and contact surface applies 1Mpa pressure, under room temperature, time of setting-up 12 hours, places 12 hours again after pressure relief, makes a strength test; Repeat, average for 5 times;

6, measure set time, get glue 10g, be positioned in beaker, heating in water bath under 50-55 degree, stir, measure its set time; Repeat, average for 5 times.

Table 1

Table 1 is the experiment effect of each embodiment and comparative example, as shown in Table 1, the white glue with vinyl environmental-protecting performance of embodiment of the present invention 1-5 is all better than comparative example 1, the equal tasteless of white glue with vinyl prepared by each embodiment, the subjective sensation of production and user is better, analyzes reason, and white glue with vinyl of the present invention is a large amount of consumption reducing vinyl acetate in component, replace vinyl acetate with nontoxic polyvinyl acetate (PVA), significantly improve the environmental-protecting performance of white glue with vinyl; Because polyvinyl acetate (PVA) is not identical with the character of vinyl acetate, for the technology stability in the performance of satisfied preparation white glue with vinyl and preparation process, need to regulate and control the ratio of polyvinyl acetate (PVA) and vinyl acetate in an OK range, need emulsifying agent, the consumption of initiator also has specific requirement simultaneously; White glue with vinyl of the present invention is by overall adjustment of formula, work in coordination with between each component, achieve while adopting polyvinyl acetate (PVA) and vinyl acetate enhancing ring guaranteed cost simultaneously, the unexpected technique effect of the remarkable lifting of white glue with vinyl over-all properties can also be realized, there is significant novelty.

Thermostability index, the thermal stability of embodiment of the present invention 1-5 is also all better than comparative example 1, experimental observation, there is not obvious sediment or gelatin phenomenon in white glue with vinyl prepared by embodiment 1-5, white glue with vinyl prepared by embodiment 1-5 has upper and lower two-layer emulsion phenomenon, and upper strata emulsion is more liquid, and lower floor's emulsion is gluing thick, mobility is slightly weak, and thermal stability is excellent; Review comparative example 1, in maintenance after 25 days, there is comparatively significantly gelatin phenomenon in white glue with vinyl, thermal stability is poor.

First dry time index, as shown in Table 1, the first dry time of embodiment of the present invention 1-5 is all shorter than comparative example 1, and just the dry time is shorter, and the performance making latex clear is more excellent; Comparative example 1 first dry for up to 50 minutes, just the dry time the longest is 32 minutes to the embodiment of the present invention, the shortlyest reaches 21 minutes, is much better than comparative example 1.

Water tolerance index, as shown in Table 1, the water tolerance that embodiment of the present invention 1-5 prepares white glue with vinyl is all better than comparative example 1, and water resistance at least improves more than 2 times, has significant technique effect.

Cohesive strength index, as shown in Table 1, the cohesive strength index that comparative example 1 prepares white glue with vinyl is 5.34Mp, and the present invention prepares the cohesive strength index of white glue with vinyl all at more than 9.11Mp, at least improve 70.6%, white glue with vinyl cohesive strength index prepared by the embodiment 5 that wherein performance is best reaches 9.90Mp, and performance boost, up to 85.4%, has the technique effect that purpose is not thought.

Set time index, as shown in Table 1, the set time that comparative example 1 prepares white glue with vinyl is 450 seconds, embodiment 1-5 prepares the set time of white glue with vinyl all within 415 seconds, white glue with vinyl prepared by embodiment 5 that the shortest is, foreshortens to 300 seconds set time, and be only that comparative example 1 prepares white glue with vinyl set time about 66.7%, significantly shorten the set time of white glue with vinyl, there is significant technical progress.

In summary it can be seen, white glue with vinyl performance prepared by embodiment of the present invention 1-5 not only environmental-protecting performance significantly promotes, and achieves the remarkable lifting of white glue with vinyl over-all properties simultaneously, has beyond thought technique effect.The indices embodied in his-and-hers watches 1 carries out global alignment, applicant finds that the white glue with vinyl of embodiment 5 index all has the most excellent performance on indices, embodiment 5 is most preferred embodiment of the present invention undoubtedly, and also namely powerful white latex of the present invention has the performance of excellence.

In conjunction with the excellent effect of the present invention, applicant sets forth component of the present invention and technique: white glue with vinyl of the present invention is enhancing ring guaranteed cost, have employed the consumption rationally reducing vinyl acetate, the technical thought of vinyl acetate is replaced with nontoxic polyvinyl acetate (PVA), because polyvinyl acetate (PVA) is not identical with the character of vinyl acetate, for the technology stability in the performance of satisfied preparation white glue with vinyl and preparation process, need to regulate and control the ratio of polyvinyl acetate (PVA) and vinyl acetate, simultaneously must the selection of all the other components in concern system.Why applicant must use polyvinyl acetate (PVA) and vinyl acetate in same system, instead of abandon vinyl acetate completely, because generally adopt vinyl acetate as raw material production white glue with vinyl in prior art, the present invention retains use vinyl acetate and the technology of the present invention can be made to have very strong promotional value in system, existing white glue with vinyl production firm can be made to be easy to accept the production technique of this improvement, but not brand-new production technique, make the technology of the present invention have good market using value; Take into account the consideration of production cost on the other hand.

Applicant is through great many of experiments, unexpected discovery, the weight ratio of polyvinyl acetate (PVA) and vinyl acetate is (700-1050): (300-350) just realizes the goal of the invention of the present invention, if the consumption of vinyl acetate exceeds this ratio, then the white glue with vinyl environmental-protecting performance of final preparation just cannot significantly promote, little with the common white latex environmental-protecting performance difference of prior art, if the too high levels of polyvinyl acetate (PVA), preparation technology's reaction stability then can be caused to be deteriorated, wayward, white glue with vinyl over-all properties is deteriorated, the over-all properties of final white glue with vinyl is caused significantly to promote.

Dibutyl phthalate and diethylene glycol dibenzoate are softening agent, and the present invention is the reaction system adapting to compound material, have employed the way simultaneously adding dibutyl phthalate and diethylene glycol dibenzoate; Octanol and Virahol, can not only be used for dissolving dibutyl phthalate and diethylene glycol dibenzoate, is conducive to the degree of adhesion improving white glue with vinyl; Can also play the effect of a part of defoamer, what be conducive to time prepared by white glue with vinyl of the present invention is steady; The applicant thinks, dibutyl phthalate, diethylene glycol dibenzoate and octanol, Virahol four kinds of components constitute synergistic small system together, specificly can meet the particular requirement that polyvinyl acetate (PVA) and vinyl acetate react in conjunction with polyvinyl alcohol as compound material, not only achieve reaction system steady, do not use the remarkable efficacy of defoamer, effectively can also promote the bond properties of white glue with vinyl, for indexs such as promoting the cohesive strength of final white glue with vinyl and set time, there is direct action effect.

Allyl methacrylate(AMA), ethyleneglycol dimethyacrylate and tolylene diisocyanate have the effect of tackiness agent, applicant selects this 3 kinds of materials dexterously, in conjunction with specific ratio, form synergy system, add in preparation technology's system in the suitable time, very considerably enhance the over-all properties of final white glue with vinyl, and bad impact is not produced on the stability of white glue with vinyl, because the time joining reaction system is last, therefore do not make the preparation technology of white glue with vinyl become more complicated yet, there is significant technical progress.Meanwhile, this area general knowledge, under normal circumstances in rational scope, the higher then result of use of concentration of white glue with vinyl is better, and for reducing costs, white glue with vinyl concentration prepared by a lot of manufacturer is only about 40%, and should be normally about 50-60%; After white glue with vinyl dilution, its moisture content improves, and in use, the moisture that white glue with vinyl contains can infiltrate ligneous piece, and wood is expanded, and causing between ligneous piece cannot be in conjunction with, causes serious product quality problem generation.Therefore, for the object improving the market competitiveness, its result of use and like product can also be kept to maintain an equal level while rationally reducing finished product white glue with vinyl concentration, there is huge marketable value undoubtedly.White glue with vinyl prepared by the present invention is when being diluted to the degree of market like product, relevant cohesive strength, set time, water tolerance etc. are known and are significantly better than like product, this improves the competitiveness of product in market of the present invention greatly, there is huge marketable value, applicant analyzes, this and in system of the present invention, employ " dibutyl phthalate, diethylene glycol dibenzoate and octanol, Virahol " and " allyl methacrylate(AMA), ethyleneglycol dimethyacrylate and tolylene diisocyanate " these 2 special synergistic combination have vital contact, these 2 collaboration systems not only can promote the adhesive property of white glue with vinyl respectively, combine, further delicate synergy can also be there is, the adhesive property of further raising white glue with vinyl, significantly increase the market competitiveness that the present invention prepares white glue with vinyl.

The experiment effect of associative list 1, although the indices of embodiment 1-5 is all better than comparative example 1, but also difference to some extent between embodiment 1-5, analysis is got off, implement the most preferred embodiment that 5 are the present invention, visible, the content of component selects also there is vital impact, so novelty of the present invention is also embodied in the content selection aspect of each component simultaneously for the final performance of index white glue with vinyl.

Certainly, because the mentality of designing of white glue with vinyl of the present invention and the requirement of goal of the invention, it is also non-obvious that all the other compositional selectings of the present invention and content are selected obviously, and those skilled in the art can expect easily in conjunction with prior art absolutely not.This has further embodiment in the preparation technology of white glue with vinyl of the present invention, can see in conjunction with embodiments of the invention, preparation method of the present invention adopts five steps to design, gradation adds raw material in batches, and the per-cent added has special scope, but not adopt disposable the adding of prior art routine, this technique adapts with the special proportioning of white glue with vinyl component of the present invention, only with adopting this technique, the smooth sequential of guarantee reaction system carries out, and guarantees the superior quality finally preparing white glue with vinyl.

The paste viscosity of waxy corn starch itself is higher, and mobility is poor, and usability is poor; The present invention adds waxy corn starch and clorox with suitable ratio simultaneously in the composition, utilizes hypochlorite oxidation waxy corn starch, forms Sumstar 190, and stick with paste viscosity and reduce, mobility improves; The present invention simultaneously with the addition of N hydroxymethyl acrylamide; Applicant finds, adds waxy corn starch simultaneously, after clorox and N hydroxymethyl acrylamide, significantly can promote the over-all properties of white glue with vinyl further, the cohesive strength of white glue with vinyl and set time index be significantly improved, over-all properties improves further; Applicant thinks, N hydroxymethyl acrylamide is rich in reactive methylol, effectively can promote the degree of adhesion of system; The Sumstar 190 that waxy corn starch changes into has good mobility and stronger anti-shear stability, can promote the fusion of N hydroxymethyl acrylamide in system of the present invention further, and then the lifting of Promotion system degree of adhesion; Meanwhile, Sumstar 190 itself also has sticks with paste viscosity preferably, also can play the effect of tamanori, promotes the adhesive capacity of system; In the process that Sumstar 190 and N hydroxymethyl acrylamide move in system, also can mutually bond, the adhesive capacity of further lifting system; Visible, the present invention is ingenious be make use of waxy corn starch and changes the characteristic that Sumstar 190 has into, not only achieve the effect of enhancing system bounding force, effectively can also promote effect of N hydroxymethyl acrylamide, also can occur to interact and bond with N hydroxymethyl acrylamide, the collaborative integrated bond ability improving system, achieves beyond thought technique effect.Because waxy corn starch itself is comparatively stable, therefore the present invention adopts waxy corn starch as raw material, is convenient to store and transport.

In sum, powerful white latex of the present invention is relative to general white glue with vinyl, and performance is more excellent, and the content of middle vinyl acetate declines to a great extent, and without the need to using formaldehyde equal solvent, fundamentally improves the environmental-protecting performance of product; White glue with vinyl of the present invention is at thermal stability simultaneously, and just the dry time, water resistance, cohesive strength and set time etc., index had outstanding representation, and over-all properties is superior.

Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme for essence.

Claims (4)

1. a powerful white latex, is characterized in that, described powerful white latex is made up of each component of following parts by weight:

Polyvinyl acetate (PVA) 900,

Vinyl acetate 330,

Polyvinyl alcohol 130,

Dibutyl phthalate 85,

Diethylene glycol dibenzoate 30,

Octanol 13,

Virahol 37,

Allyl methacrylate(AMA) 19,

Ethyleneglycol dimethyacrylate 8,

Tolylene diisocyanate 5,

Sodium bicarbonate 41,

Water 1460,

Emulsifying agent 46,

Initiator 8,

N-methylolacrylamide 27,

Waxy corn starch 13,

Clorox 5.

2. powerful white latex according to claim 1, is characterized in that, described emulsifying agent is Sodium dodecylbenzene sulfonate or sodium oleate.

3. powerful white latex according to claim 1, is characterized in that, described initiator is Potassium Persulphate or ammonium persulphate.

4. prepare a method for powerful white latex according to claim 1, it is characterized in that, described method is made up of following steps:

Step one, under agitation condition, gets water and the polyvinyl alcohol of 50-73% weight percent, and mixing, is warmed up to 88-95 degree, polyvinyl alcohol is dissolved completely, and be incubated 1 hour under 70-80 degree, adjustment pH is 8-9, obtains solution A;

Step 2, get the emulsifying agent of 30-40% weight percent, under agitation condition, described emulsifying agent and remaining water are joined in solution A, slowly add the vinyl acetate of 40-50% weight percent and the initiator of 40-50% weight percent again, be warming up to 88-95 degree, insulation 0.3-0.5 hour; Be cooled to 60-70 degree; Slowly add remaining vinyl acetate and remaining initiator more afterwards; Be warming up to 88-95 degree, insulation 0.2-0.4 hour;

Step 3, adds emulsifying agent and the polyvinyl acetate (PVA) of 30-40% weight percent, is incubated 0.2-0.4 hour under 88-95 degree, be then cooled to 40-50 degree;

Step 4, under agitation condition, adds sodium bicarbonate, dibutyl phthalate, diethylene glycol dibenzoate, octanol, Virahol, mixes, obtain solution B;

Step 5, adds remaining emulsifying agent, allyl methacrylate(AMA), ethyleneglycol dimethyacrylate in solution B, tolylene diisocyanate, n-methylolacrylamide, waxy corn starch, clorox, mix, 40-50 degree insulation 0.1-0.3 hour, is cooled to room temperature, obtains final product.