CN107022163A - A kind of polyvinyl alcohol collodion and preparation method thereof - Google Patents
A kind of polyvinyl alcohol collodion and preparation method thereof Download PDFInfo
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- CN107022163A CN107022163A CN201710440684.0A CN201710440684A CN107022163A CN 107022163 A CN107022163 A CN 107022163A CN 201710440684 A CN201710440684 A CN 201710440684A CN 107022163 A CN107022163 A CN 107022163A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/14—Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
Abstract
The invention provides a kind of preparation method of polyvinyl alcohol collodion：Polyethylene alcohol and water is mixed, polyvinyl alcohol water solution is obtained；The polyvinyl alcohol water solution and thickener are mixed, thickener system is obtained；The thickener system and surfactant are mixed, surfactant system is obtained；The surfactant system and catalyst are mixed, catalyst system is obtained；The catalyst system and curing agent are mixed, injection molding liquid is obtained；The injection molding liquid is sequentially poured into a mould and curing molding, polyvinyl alcohol collodion is obtained.The method that the present invention is provided can effectively control the speedup of injection molding fluid viscosity, it is ensured that it is in flow regime in injection molded process, so as to realize amplification production, 45 times of amplifications can be with 100% injection molding；The performance and apparent form of obtained new product are suitable with the PVA collodion using starch as pore former simultaneously, can substantially meet production requirement.
Description
Technical field
The present invention relates to polyvinyl alcohol collodion technical field, more particularly to a kind of polyvinyl alcohol collodion and preparation method thereof.
Background technology
Polyvinyl alcohol (PVA) collodion is by polyvinyl alcohol and the formaldehyde foamed a kind of sponge prepared in acid condition
Product, is widely used in family expenses and keeps a public place clean market.Using starch as pore former more than the PVA collodion of current industrialized production, still
The problems such as use of starch can cause big cost raising, water consumption, body eutrophication and mouldy PVA collodion.
The preparation of no starch/PVA collodion is proposed in industry regarding to the issue above.Report at present without starch/PVA collodion system
It is standby to usually require higher PVA solution concentration to keep bubble, but high concentration PVA solution is easily caused acetal speed and speeded, from
And reaction system viscosity is quickly increased, it is transformed into the short time under gel state, normal pressure and is difficult to flow, it is impossible to processing and forming and puts
Big production.Such as in academic dissertation：Without starch/PVA collodion foaming technique research (Li Jun swallow Institutes Of Technology Of Zhejiang, 2015-3) and
In Chinese patent CN106349617A, using formaldehyde as curing agent and hydrochloric acid as catalyst preparation without starch/PVA collodion, system
The increase of PVA collodion injection molding fluid viscosity is too fast during standby.
The content of the invention
It is an object of the invention to provide the preparation method that a kind of polyvinyl alcohol collodion and preparation method thereof, the present invention are provided
Production can be amplified.
In order to realize foregoing invention purpose, the present invention provides following technical scheme：
The invention provides a kind of preparation method of polyvinyl alcohol collodion, comprise the following steps：
(1) polyethylene alcohol and water is mixed, obtains polyvinyl alcohol water solution；
(2) polyvinyl alcohol water solution and thickener are mixed, obtains thickener system；
(3) thickener system and surfactant are mixed, obtains surfactant system；
(4) surfactant system and catalyst are mixed, obtains catalyst system；
(5) catalyst system and curing agent are mixed, obtains injection molding liquid；
(6) the injection molding liquid is sequentially poured into a mould and curing molding, obtains polyvinyl alcohol collodion.
It is preferred that, the thickener is xanthans, sodium carboxymethylcellulose, sodium alginate, polyacrylamide and polypropylene
One or more in acid.
It is preferred that, the surfactant is lauryl sodium sulfate, Qula logical x-100, Tween-80, octyl phenol
One or more in APEO -10 and sorbester p17.
It is preferred that, the catalyst is the one or more in hydrochloric acid, oxalic acid, sulfuric acid, nitric acid and ammonium chloride.
It is preferred that, the curing agent is formaldehyde and/or acetal.
It is preferred that, the acetal is formal, ethylal, propylal and two butanol contracting first
One or more in aldehyde.
It is preferred that, the polyvinyl alcohol, water, thickener, surfactant, the mass ratio of catalyst and curing agent are (10
~14):(65~75):(0.2~0.6):(0.2~0.6):(3.6~8):(9.1~20).
It is preferred that, the temperature of mixing is 85~95 DEG C in the step (1)；
The temperature of mixing is 75~80 DEG C in step (2)；
The temperature of mixing is 52~55 DEG C in step (3)；
The temperature of mixing is 50~52 DEG C in step (4)；
The temperature of mixing is 48~52 DEG C in step (5).
It is preferred that, the temperature of the curing molding is 55~75 DEG C.
Present invention also offers the polyvinyl alcohol collodion that the preparation method described in above-mentioned technical proposal any one is obtained.
The invention provides a kind of preparation method of polyvinyl alcohol collodion：Polyethylene alcohol and water is mixed, polyethylene is obtained
Alcohol solution；The polyvinyl alcohol water solution and thickener are mixed, thickener system is obtained；By the thickener system and table
Face activating agent mixing, obtains surfactant system；The surfactant system and catalyst are mixed, caltalyst is obtained
System；The catalyst system and curing agent are mixed, injection molding liquid is obtained；The injection molding liquid is sequentially poured into a mould and is solidified into
Type, obtains polyvinyl alcohol collodion.The method that the present invention is provided can effectively control the speedup of injection molding fluid viscosity, it is ensured that it is in note
Flow regime is in mold process, so as to realize amplification production, 45 times of amplifications can be with 100% injection molding；New product obtained by simultaneously
Performance and apparent form it is suitable with the PVA collodion using starch as pore former, production requirement can be substantially met.
Brief description of the drawings
Fig. 1 is the injection molding liquid of embodiment 1 viscosity B coefficent curve at 50 DEG C；
Fig. 2 is the injection molding liquid of embodiment 1 viscosity B coefficent curve at 55 DEG C；
Fig. 3 is the injection molding liquid of embodiment 1 viscosity B coefficent curve at 60 DEG C；
Fig. 4 is the injection molding liquid of embodiment 2 viscosity B coefficent curve at 50 DEG C；
Fig. 5 is the injection molding liquid of embodiment 2 viscosity B coefficent curve at 55 DEG C；
Fig. 6 is the injection molding liquid of embodiment 2 viscosity B coefficent curve at 60 DEG C；
Fig. 7 is PVA collodion I apparent form；
Fig. 8 is PVA collodion II apparent form；
Fig. 9 is PVA collodion II amplification 45 times of production real conditions of production；
Figure 10 is PVA collodion I-45 apparent form；
Figure 11 is PVA collodion II-45 apparent form.
Embodiment
The invention provides a kind of preparation method of polyvinyl alcohol collodion, comprise the following steps：
(1) polyethylene alcohol and water is mixed, obtains polyvinyl alcohol water solution；
(2) polyvinyl alcohol water solution and thickener are mixed, obtains thickener system；
(3) thickener system and surfactant are mixed, obtains surfactant system；
(4) surfactant system and catalyst are mixed, obtains catalyst system；
(5) catalyst system and curing agent are mixed, obtains injection molding liquid；
(6) the injection molding liquid is sequentially poured into a mould and curing molding, obtains polyvinyl alcohol collodion.
The present invention mixes polyvinyl alcohol (PVA) and water, obtains polyvinyl alcohol water solution.In the present invention, because water is
PVA good solvent, aqueous solvent is completely dissolved PVA, and the hydroxyl that PVA strands are on the fully extended state, strand is whole
Expose and, now again mixed PVA solution with other materials, it can be accelerated to react and make reaction thorough.In the present invention
In, the temperature of the polyethylene alcohol and water mixing is preferably 85~95 DEG C, more preferably 88~92 DEG C, most preferably 90 DEG C；It is mixed
The time of conjunction is preferably 1~5h, more preferably 1.5~2h.In the present invention, the mixing of the polyethylene alcohol and water is preferably being stirred
Carried out under the conditions of mixing, the speed of the stirring is preferably 800~1000r/min, more preferably 850~950r/min, most preferably
For 900r/min.
Obtain after the polyvinyl alcohol water solution, the present invention mixes the polyvinyl alcohol water solution and thickener, obtains
Thickener system.In the present invention, the thickener is preferably xanthans, sodium carboxymethylcellulose, sodium alginate, polyacrylamide
One or more in amine and polyacrylic acid.In the present invention, the temperature of polyvinyl alcohol water solution and the thickener mixing is excellent
Elect 75~80 DEG C, most preferably more preferably 78~80 DEG C, 80 DEG C as；The time of mixing is preferably 8~12min, more preferably
10~11min.In the present invention, the mixing of the polyvinyl alcohol water solution and thickener is preferably carried out under agitation, institute
The speed for stating stirring is preferably 800~1000r/min, more preferably 850~950r/min, most preferably 900r/min.
Obtain after thickener system, the present invention mixes the thickener system and surfactant, obtains surface-active
Agent system.In the present invention, the surfactant is preferably lauryl sodium sulfate, Qula logical x-100, Tween-80, octane
One or more in base phenol APEO -10 (OP-10) and sorbester p17 (Span-80).In the present invention, the thickening
The temperature that agent system and surfactant are mixed is preferably 52~55 DEG C, more preferably 53~54 DEG C；The time of mixing is preferably 2
~3min.In the present invention, the mixing of the thickener system and surfactant is preferably carried out under agitation, described to stir
The speed mixed is preferably 800~1000r/min, more preferably 850~950r/min, most preferably 900r/min.
The present invention first mixes polyvinyl alcohol water solution with thickener, and the system of ensure that has enough viscosity, adds
Surfactant, makes PVA solution preferably fully foam.If thickener and surfactant addition sequence on the contrary, if can cause
PVA solution viscosity is relatively low, it is impossible to fixed bubble, it is impossible to fully foaming.
The present invention continues to carry out obtained mixture preferably after the thickener system and surfactant are mixed
Stirring foaming.In the present invention, the temperature of the stirring foaming is preferably 52~54 DEG C, more preferably 53 DEG C；The stirring hair
The time of bubble is preferably 12~15min, more preferably 13~14min；The stir speed (S.S.) of the stirring foaming is preferably 1700~
2000r/min, more preferably 1800~1900r/min.
Obtain after surfactant system, the present invention mixes the surfactant system and catalyst, is catalyzed
Agent system.In the present invention, the catalyst is preferably the one or more in hydrochloric acid, oxalic acid, sulfuric acid, nitric acid and ammonium chloride.
In the present invention, the temperature of surfactant system and the catalyst mixing is preferably 50~52 DEG C, more preferably 51 DEG C；It is mixed
The time of conjunction is preferably 2~3min.In the present invention, the mixing of the surfactant system and catalyst is preferably in stirring bar
Carried out under part, the speed of the stirring is preferably 800~1000r/min, more preferably 850~950r/min, be most preferably
900r/min.The present invention does not have any particular/special requirement to the concentration of the hydrochloric acid, oxalic acid, sulfuric acid and nitric acid, using this area
The concentration of catalyst acid in the collodion field that technical staff commonly uses.
Obtain after the catalyst system, the present invention mixes the catalyst system and curing agent, obtains injection molding liquid.
In the present invention, the curing agent is preferably formaldehyde and/or acetal；The acetal is formal, diethanol contracting first
One or more in aldehyde, propylal and two butanol formals.In the specific embodiment of the invention, the formaldehyde is preferred
It is added in the form of formalin, the concentration of the formalin is preferably 35~40wt%, more preferably 37wt%.
In the present invention, the addition of the formaldehyde is in terms of formalin.The present invention is to the source of the acetal without not any special
It is required that, it can both select commercially available acetal product well-known to those skilled in the art, it would however also be possible to employ people in the art
It is prepared by the preparation method of the acetal known to member.In the present invention, contracted using alcohol well-known to those skilled in the art
The preparation method of aldehyde prepare for acetal mixed liquor.In the present invention, the acetal mixed liquor is not preferably by
Small molecular alcohol and formaldehyde with mol ratio are prepared in 30~60 DEG C of acetalation 2h.In the present invention, alcohol aldehyde mol ratio
Preferably (0.5~2):1.In the present invention, preferably comprised in the acetal mixed liquor unreacted small molecular alcohol, formaldehyde,
Hydrochloric and the acetal and water of aldolisation generation.For example, formal mixed liquor refers to unreacted first
The mixed liquor that alcohol, formaldehyde, hydrochloric and reaction product formal and the water of aldolisation generation are constituted.At this
In invention, the concentration that acetal accounts for injection molding liquid in the acetal mixed liquor is preferably 0.3~1.3mol/L, and more preferably 0.5
~1mol/L.In the present invention, when the acetal in the form of acetal mixed liquor when to add, addition is with the amount of mixed liquor
On the basis of.
In the present invention, the temperature of catalyst system and the curing agent mixing is preferably 48~52 DEG C, more preferably 49
~51 DEG C；The time of mixing is preferably 1~2min.In the present invention, the mixing of the catalyst system and curing agent preferably exists
Carried out under stirring condition, the speed of the stirring is preferably 1500~1800r/min, more preferably 1600~1700r/min.
In the present invention, the mass ratio of the polyvinyl alcohol, water, thickener, surfactant, catalyst and curing agent is excellent
Elect as (10~14):(65~75):(0.2~0.6):(0.2~0.6):(3.6~8):(9.1~20), more preferably (11~
13):(68~73):(0.3~0.4):(0.3~0.4):(5~6):(12~18).
In the present invention, when the catalyst is hydrochloric acid, the curing agent (is designated as scheme one) when being acetal, described poly-
Vinyl alcohol, water, thickener, surfactant, the mass ratio of catalyst and curing agent are preferably (10~14):(65~75):
(0.2~0.5):(0.3~0.6):(6~8):(10~20), more preferably (11~13):(68~73):(0.3~0.4):
(0.4~0.5):(6.5~7):(12~18).
In the present invention, when the catalyst is oxalic acid, the curing agent (is designated as scheme two) when being formaldehyde, the poly- second
Enol, water, thickener, surfactant, the mass ratio of catalyst and curing agent are preferably (10~14):(72~75):(0.4
~0.6):(0.2~0.5):(3.6~4.6):(9.1~9.4), more preferably (11~13):(73~74):(0.45~
0.55):(0.3~0.4):(4~4.2):(9.2~9.3).
Obtain after the injection molding liquid, the present invention is sequentially poured into a mould the injection molding liquid and curing molding, obtains polyethylene
Alcohol collodion.The present invention does not have any particular/special requirement to the embodiment of the cast, using well known to those skilled in the art
Collodion placingJi Shu carry out.
In the present invention, the curing molding is preferably steam drying box solidification；The temperature of the curing molding is preferably 55
~75 DEG C, more preferably 60~70 DEG C；The time of curing molding is preferably 7~35h, more preferably 9~33h.
In the present invention, the temperature of the curing molding of such scheme one is preferably 65~75 DEG C, more preferably 68~73 DEG C；Gu
The time of chemical conversion type is preferably 7~14h, more preferably 9~12h.
In the present invention, the temperature of the curing molding of such scheme two is preferably 55~70 DEG C, more preferably 60~65 DEG C；Gu
The time of chemical conversion type is preferably 25~35h, more preferably 28~33h.
Present invention also offers the polyvinyl alcohol collodion that the preparation method described in above-mentioned technical proposal any one is obtained.
Polyvinyl alcohol collodion provided with reference to embodiment the present invention and preparation method thereof is described in detail, but
It is that they can not be interpreted as limiting the scope of the present invention.
Embodiment 1
(1) 65gPVA and 400g water is weighed in 1000mL three-necked flasks, and heating water bath is sufficiently stirred for dissolving to 95 DEG C
1.5h, is made PVA solution；
(2) the PVA aqueous solution for obtaining step (1) is cooled to 80 DEG C, adds thickener xanthans 2.2g, dissolution time
10min, Surfactant SDS add temperature be 55 DEG C, dissolution time 2min, stirring foaming time be
15min, stir speed (S.S.) 2000r/min, makes PVA solution fully foam；
(3) PVA solution after 42g mass concentrations being added into the foaming that step (2) is obtained at 52 DEG C for 31wt% hydrochloric acid
In, stir about 5min；Curing agent formaldehyde 53g is added at 52 DEG C, mixing time is 2min, is made without starch/PVA collodion injection molding liquid,
It is designated as B.
(4) PVA solution after 42g mass concentrations being added into the foaming that step (2) is obtained at 52 DEG C for 31wt% hydrochloric acid
In, stir about 5min；Formal mixed liquor is added at 52 DEG C, mixing time is 2min, be made without starch/PVA collodion note
Mould liquid, is designated as A1；
Or ethylal mixed liquor is added, mixing time is 2min, is made without starch/PVA collodion injection molding liquid, note
For A2。
Wherein, formal mixed liquor is by mol ratio n (CH3OH):n(CH2O)=2:1 methanol is with formaldehyde in hydrochloric acid
It is catalyzed lower 30 DEG C of aldolisation 2h to prepare, wherein formaldehyde consumption is 53g；
Prepared by ethylal mixed liquor is by mol ratio n (EtOH):n(CH2O)=2:1 ethanol is with formaldehyde in salt
The lower 60 DEG C of aldolisation 2h of acid catalysis are prepared, and wherein formaldehyde consumption is 53g.
(5) by step (3) obtain without starch/PVA collodion injection molding liquid B and step (4) obtain without starch/PVA collodion
Injection molding liquid A1And A2220mL is taken out respectively in 250mL beakers, is placed in 50 DEG C, 55 DEG C and 60 DEG C thermostat water baths, is used
NAX-1 types rotary viscosimeter measures injection molding fluid viscosity and changes over time relation in real time.
Result shown in Fig. 1~3 is drawn according to step (5), wherein, Fig. 1 is the injection molding liquid of embodiment 1 viscosity B coefficent at 50 DEG C
Curve, Fig. 2 is the injection molding liquid of embodiment 1 viscosity B coefficent curve at 55 DEG C, and Fig. 3 is that the injection molding liquid of embodiment 1 viscosity at 60 DEG C becomes
Change curve.From Fig. 1~3, with the extension without starch/PVA collodion injection molding liquid constant temperature standing time, the increase of its viscosity；Step
(3) original directly fed intake with formaldehyde in is advanced the speed without starch/PVA collodion injection molding liquid B viscosity with the time is significantly faster than that step (4)
It is middle without starch/PVA collodion injection molding liquid A1And A2, this explanation small molecular alcohol acetal mixed liquor by hydrolysis instead of after formaldehyde, slowly being released
Concentration of formaldehyde in formaldehyde, control injection molding liquid is put, so as to slow down its aldolisation speed, no starch/PVA collodion can be effectively controlled
The change of injection molding fluid viscosity.
Embodiment 2
According to the identical method of embodiment 1, the salt in the step of embodiment 1 (3) is replaced using 22.5g oxalic acid as catalyst
Acid, curing agent is formaldehyde, and consumption is 53g, and blended acquisition is without starch/PVA collodion injection molding liquid C, respectively at 50 DEG C, 55 DEG C and 60
At DEG C carry out viscosity change with time relation measure, as shown in figures 4-6.Wherein, Fig. 4 is the injection molding liquid of embodiment 2 at 50 DEG C
Viscosity B coefficent curve, Fig. 5 is the injection molding liquid of embodiment 2 viscosity B coefficent curve at 55 DEG C, and Fig. 6 is the injection molding liquid of embodiment 2 at 60 DEG C
Lower viscosity B coefficent curve.From Fig. 4~6, original of the contrast by catalyst of hydrochloric acid is without starch/PVA collodion injection molding liquid B, with oxalic acid
Increase slow with the time for the injection molding liquid C viscosity of catalyst, realize the control effect good to injection molding fluid viscosity.
Embodiment 3
Method according to the step of embodiment 1 (1) (2) (4) obtains no starch/PVA collodion injection molding liquid A, places it in steam baking
Solidify 12h at 72 DEG C in case, PVA collodion is made, PVA collodion I is designated as.
Method according to embodiment 2 obtains no starch/PVA collodion injection molding liquid C, places it in solid at 60 DEG C in steam drying box
Change 33h, PVA collodion is made, PVA collodion II is designated as.
PVA collodion using starch as pore former is derived from commercially available wonderful clean mop collodion, is designated as PVA collodion III.
Performance to the PVA collodion III without starch/PVA collodion I, PVA collodion II and by pore former of starch is tested,
It the results are shown in Table 1.
The collodion the performance test results data of table 1
As shown in Table 1, PVA collodion I and PVA collodion II similar natures, and with the performance suitable with PVA collodion III.
PVA collodion I and PVA collodion II apparent forms difference are as shown in Figure 7 and Figure 8.Wherein, Fig. 7 is PVA collodion I table
Pattern is seen, Fig. 8 is PVA collodion II apparent form.From Fig. 7 and Fig. 8, PVA collodion I and PVA collodion II exterior appearances are good
It is good.
Embodiment 4
The PVA collodion I determined by embodiment 3 carries out 45 times of amplifications of equal conditions, can realize 100% injection molding, product note
For PVA collodion I-45 (72 DEG C of solidification temperature, hardening time 12h).
The PVA collodion II determined by embodiment 3 carries out 45 times of amplifications of equal conditions, can realize that 100% injection molding (refers to figure
9), product is designated as PVA collodion II-45 (60 DEG C of solidification temperature, hardening time 33h).Fig. 9 is 45 times of PVA collodion II amplifications production
Production real condition.
Table 2PVA collodion the performance test results data
As shown in Table 2, it is consistent with lab scale PVA collodion various aspects of performance, and with the performance suitable with PVA collodion III.
PVA collodion I-45 and PVA collodion II-45 apparent forms difference are as shown in Figure 10 and Figure 11.Wherein, Figure 10 is PVA
Collodion I-45 apparent form, Figure 11 is PVA collodion II-45 apparent form.From Figure 10 and Figure 11, PVA collodion I-45
It is good with PVA collodion II-45 exterior appearances.
As seen from the above embodiment, the invention provides a kind of preparation method of polyvinyl alcohol collodion：By polyvinyl alcohol and
Water is mixed, and obtains polyvinyl alcohol water solution；The polyvinyl alcohol water solution and thickener are mixed, thickener system is obtained；Will
Thickener system and the surfactant mixing, obtains surfactant system；By the surfactant system and catalysis
Agent is mixed, and obtains catalyst system；The catalyst system and curing agent are mixed, injection molding liquid is obtained；The injection molding liquid is suitable
It is secondary to be poured into a mould and curing molding, obtain polyvinyl alcohol collodion.The method that the present invention is provided can effectively control injection molding liquid to glue
The speedup of degree, it is ensured that it is in flow regime in injection molded process, so as to realize amplification production, 45 times of amplifications can be with 100% note
Mould；The performance and apparent form of obtained new product are suitable with the PVA collodion using starch as pore former simultaneously, can substantially meet
Production requirement.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of preparation method of polyvinyl alcohol collodion, is comprised the following steps：
(1) polyethylene alcohol and water is mixed, obtains polyvinyl alcohol water solution；
(2) polyvinyl alcohol water solution and thickener are mixed, obtains thickener system；
(3) thickener system and surfactant are mixed, obtains surfactant system；
(4) surfactant system and catalyst are mixed, obtains catalyst system；
(5) catalyst system and curing agent are mixed, obtains injection molding liquid；
(6) the injection molding liquid is sequentially poured into a mould and curing molding, obtains polyvinyl alcohol collodion.
2. preparation method according to claim 1, it is characterised in that the thickener is xanthans, carboxymethyl cellulose
One or more in sodium, sodium alginate, polyacrylamide and polyacrylic acid.
3. preparation method according to claim 1, it is characterised in that the surfactant be lauryl sodium sulfate,
The one or more that Qula is led in x-100, Tween-80, octyl phenol APEO -10 and sorbester p17.
4. preparation method according to claim 1, it is characterised in that the catalyst is hydrochloric acid, oxalic acid, sulfuric acid, nitric acid
With the one or more in ammonium chloride.
5. preparation method according to claim 1, it is characterised in that the curing agent is formaldehyde and/or acetal.
6. preparation method according to claim 5, it is characterised in that the acetal is formal, diethanol
One or more in formal, propylal and two butanol formals.
7. the preparation method according to claim 1~6 any one, it is characterised in that the polyvinyl alcohol, water, thickening
Agent, surfactant, the mass ratio of catalyst and curing agent are (10~14):(65~75):(0.2~0.6):(0.2~
0.6):(3.6~8):(9.1~20).
8. the preparation method according to claim 1~6 any one, it is characterised in that the temperature of mixing in the step (1)
Spend for 85~95 DEG C；
The temperature of mixing is 75~80 DEG C in step (2)；
The temperature of mixing is 52~55 DEG C in step (3)；
The temperature of mixing is 50~52 DEG C in step (4)；
The temperature of mixing is 48~52 DEG C in step (5).
9. the preparation method according to claim 1~6 any one, it is characterised in that the temperature of the curing molding is
55~75 DEG C.
10. the polyvinyl alcohol collodion that the preparation method described in claim 1~9 any one is obtained.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112662098A (en) * | 2020-12-08 | 2021-04-16 | 湖北魔洗高新材料制品有限公司 | Preparation method of PVA collodion cotton head with good water absorption |
| CN115536895A (en) * | 2022-08-25 | 2022-12-30 | 深圳市兴业卓辉实业有限公司 | Preparation method of antibacterial PVA sponge and sponge mop |
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| CN115536895A (en) * | 2022-08-25 | 2022-12-30 | 深圳市兴业卓辉实业有限公司 | Preparation method of antibacterial PVA sponge and sponge mop |
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| CN107022163B (en) | 2020-04-03 |
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