CN110372890A - PVC emulsifying powder, its manufacturing method and its application - Google Patents
PVC emulsifying powder, its manufacturing method and its application Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F114/00—Homopolymers 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 a halogen
- C08F114/02—Monomers containing chlorine
- C08F114/04—Monomers containing two carbon atoms
- C08F114/06—Vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/26—Emulsion polymerisation with the aid of emulsifying agents anionic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/30—Emulsion polymerisation with the aid of emulsifying agents non-ionic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use 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 a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use 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 a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use 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 a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2401/02—Cellulose; Modified cellulose
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Abstract
The invention discloses a kind of PVC emulsifying powder, its manufacturing method and its applications, the manufacturing method of PVC emulsifying powder, it is that vinyl chloride monomer and emulsifier are subjected to polymerization reaction, to obtain the first polyvinyl chloride emulsion, wherein the weight based on vinyl chloride monomer is 100wt%, the content of emulsifier is 0.5wt% to 2.0wt%, and the degree of polymerization of the first polyvinyl chloride emulsion is 700 to 1800；Cellulose nano-fibrous to the addition of the first polyvinyl chloride emulsion, to obtain the second polyvinyl chloride emulsion, wherein the weight based on the first polyvinyl chloride emulsion is 100wt%, cellulose nano-fibrous content is 0.1wt% to 5.0wt%；And step is dried to the second polyvinyl chloride emulsion, to obtain PVC emulsifying powder.PVC emulsifying powder obtained by the present invention has lower haze value, and obtained foamed material can have good foaming effect.
Description
Technical field
The present invention relates to a kind of PVC emulsifying powders, especially with regard to a kind of PVC emulsifying powder, its manufacturer
Method and its application.
Background technique
It generally can operate with rtificial leather, wallpaper, automotive seat using foamed material made by PVC emulsifying powder
And interior trim skin etc..The mode of such as chemical blowing can be used to manufacture for this foamed material, and foaming formulation can be mixing plasticizer, gather
Vinyl chloride emulsifying powder, stabilization agent, foaming agent and filler material, and baking molding is carried out in the way of coating.The machine of chemical blowing
It is made as in the plastic paste of foaming agent upon mixing generating gas (such as: nitrogen) through pyrolytic and foam, when the progress of plastic paste
After coating, during its gelatinization, by melt viscosity appropriate, gas of arranging in pairs or groups generates abscess, and abscess is fixed after cooling, i.e.,
Foaming body can be formed.Foaming body preferably has careful and uniform foam bubble.
According to the difference of the application of foamed material, the requirement of fineness and uniformity for foam bubble is also poor
It is different, and the property of PVC emulsifying powder has significant impact not only for the size and the uniformity of above-mentioned foam bubble, more
Influence the engineering properties of obtained foamed material.In general, when the degree of polymerization of PVC emulsifying powder is higher, foamed material
Engineering properties (such as: elasticity and rub resistance) preferably, but usually foaming effect is poor.It will be understood that described herein
Foaming effect is determined according to the surface fineness of foamed material, the size of foam bubble and uniformity, foaming effect difference system
Refer to that the surface fineness of foamed material is bad, the size of foam bubble is larger and uneven；Conversely, foaming effect refers to well foaming
The surface fineness of material is good, and the size of foam bubble is small and uniform.
In addition, emulsifier (or surfactant) would generally be added in the processing procedure of PVC emulsifying powder, emulsifier
Additive amount also will affect the foaming effect of subsequent foamed material obtained.By adding polyvinyl chloride obtained by more emulsifier
Emulsifying powder, the emulsifier for helping to keep the foam bubble size of the foamed material of production smaller and uniform but too many can make polychlorostyrene
The viscosity and haze value of ethylene emulsifying powder rise, then are unfavorable for the products application as automotive interior material.
In view of this, a kind of manufacturing method of PVC emulsifying powder need be provided, have to produce compared with proper viscosity
And the PVC emulsifying powder of lower haze value, and make obtained foamed material that there is preferable foaming effect.
Summary of the invention
The purpose of the present invention is to provide a kind of PVC emulsifying powder, its manufacturing method and its applications, obtained by it
PVC emulsifying powder there is lower haze value, and obtained foamed material can have good foaming effect.
It is the cream using certain content it is an aspect of the present invention to provide a kind of manufacturing method of PVC emulsifying powder
Agent and the obtained polyvinyl chloride emulsion with specific aggregation degree, then add cellulose nano-fibrous to produce polyvinyl chloride cream
Change powder.
Another aspect of the present invention is to provide a kind of PVC emulsifying powder, is made using the method for above-mentioned aspect
?.
It is the PVC emulsifying powder comprising above-mentioned aspect it is another aspect of the present invention to provide a kind of foamed material.
According to an aspect of the present invention, a kind of manufacturing method of PVC emulsifying powder is provided.Firstly, by vinyl chloride monomer
And emulsifier carries out polymerization reaction, to obtain the first polyvinyl chloride emulsion, wherein the degree of polymerization of the first polyvinyl chloride emulsion is 700
To 1800.Weight based on vinyl chloride monomer is 100wt%, and the content of emulsifier is 0.5wt% to 2.0wt%.Then, to
The addition of one polyvinyl chloride emulsion is cellulose nano-fibrous, to obtain the second polyvinyl chloride emulsion.Based on the first polyvinyl chloride emulsion
Weight be 100wt%, cellulose nano-fibrous content be 0.1wt% to 5.0wt%.Then, to the second polyvinyl chloride cream
Step is dried in liquid, to obtain PVC emulsifying powder.
An embodiment according to the present invention, the content of mentioned emulsifier are 0.5wt% to 1.5wt%.
An embodiment according to the present invention, the degree of polymerization of above-mentioned polyvinyl chloride emulsion are 700 to 1500.
An embodiment according to the present invention, above-mentioned polymerization reaction are emulsion polymerization method, micro-suspension polymerization or mixing method.
An embodiment according to the present invention, above-mentioned cellulose nano-fibrous content are 0.2wt% to 3.0wt%.
An embodiment according to the present invention, above-mentioned cellulose nano-fibrous average diameter are 4nm to 500nm.
An embodiment according to the present invention, mentioned emulsifier are anionic emulsifier and/or nonionic emulsifier.
According to another aspect of the present invention, a kind of PVC emulsifying powder is provided, is to utilize above-mentioned polyvinyl chloride cream
Obtained by the manufacturing method for changing powder.
In accordance with a further aspect of the present invention, a kind of foamed material is provided, is the PVC emulsifying comprising above-mentioned aspect
Powder.
It is the emulsifier by adding specific quantity, and add using the manufacturing method of PVC emulsifying powder of the invention
Add the cellulose nano-fibrous of specific quantity, and makes PVC emulsifying powder obtained that there is lower haze value, and hair obtained
Foam material can have good foaming effect.
Detailed description of the invention
It is detailed in conjunction with attached drawing for above-mentioned and other purposes, feature, advantage and the embodiment of the present invention can be clearer and more comprehensible
It is described as follows:
Fig. 1 is the flow chart for being painted the manufacturing method of PVC emulsifying powder according to the present invention.
Fig. 2A to Fig. 2 C is to show that the electron microscope of the section of foamed material of embodiment 5 and comparative example 3 to 4 shines respectively
Piece.
Specific embodiment
From the above, the present invention provides a kind of manufacturer of polyvinyl chloride (polyvinyl chloride, PVC) emulsifying powder
Method is the emulsifier using certain content and the polyvinyl chloride emulsion with specific aggregation degree is made, then adds cellulose and receive
Rice fiber (cellulose nanofiber, CNF) is to produce PVC emulsifying powder.
Referring to Fig. 1, it is the flow chart for being painted the manufacturing method 100 of PVC emulsifying powder according to the present invention.It is first
First, step 110 is carried out, vinyl chloride monomer (vinyl chloride monomer, VCM) and emulsifier are subjected to polymerization reaction,
To obtain the first polyvinyl chloride emulsion.Weight based on vinyl chloride monomer is 100wt%, the content of emulsifier be 0.5wt% extremely
2.0wt%, preferably 0.5wt% are to 1.5wt%, more preferably 1.0wt% to 1.5wt%.As described above, if the addition of emulsifier
Amount is very little, such as less than 0.5wt%, then the stability of subsequent PVC emulsifying powder obtained is bad.However, if emulsifier
Additive amount is too many, is greater than 2.0wt%, then the haze value of subsequent PVC emulsifying powder obtained is too high, is unfavorable for subsequent
Using, such as the interior material of automobile.
In one embodiment, the vinyl chloride monomer of step 110 and emulsifier are carried out in water and under the catalysis of catalyst
Polymerization reaction.In one embodiment, polymerization reaction can react (micro- for emulsion polymerization reaction, microsuspension polymerization
Suspension polymerization), mixing method and above-mentioned any combination.Microsuspension polymerization reaction is using disposable
Charging, is added reactive tank for vinyl chloride monomer, emulsifier, water and catalyst together, uniform through too strong mechanical stirring, polychlorostyrene is made
Vac emulsion.The particle of microsuspension polymerization reaction is Unimodal Distribution, and average grain diameter is about 0.75 μm to about 1.0 μm.
Emulsion polymerization reaction may be, for example, seed emulsion polymerization, be first continuous note chlorination vinyl monomer, emulsifier and
Water-soluble catalyst (oxidant), to carry out polymerization reaction, wherein the reaction of seed emulsion polymerization must utilize specific stirring system (example
Such as, reacting used stirring system than micro suspension emulsion polymerization has higher intensity), there is specific dispersibility to generate
Seed emulsion.Then, about 10% seed emulsion is added and is overlapped slot, be overlapped reaction to carry out second stage.Seed emulsification is poly-
Closing the obtained polyvinyl chloride emulsion of reaction is with bimodal distribution, and average grain diameter is about 0.4 μm to about 1.0 μm.
In one embodiment, emulsifier can be anionic emulsifier and/or nonionic emulsifier.In a concrete example
In, anionic emulsifier includes long chain alkyl sulphonates, long olefin sulfonate, long-chain alkyl benzene sulfonate, aromatic radical sulphur
Hydrochlorate, sulphosuccinates, amidoalkyl group sulfonate, long chain alkyl sulfates, aliphatic alcohol sulfate, fatty alcohol ether sulfuric acid
Salt, fatty acid salt, alkyl sulfo succinate, phosphate ester salt, fatty alcohol phosphates, alkyl phosphate salt and above-mentioned any
Combination.In a concrete example, nonionic emulsifier includes fatty alcohol (such as the spermaceti with 12 to 20 carbon atoms
Alcohol, octadecanol or fatty alcohol-epoxy ethane-epoxy propane-addition product), (such as nonyl phenol is poly- for alkyl phenol polyglycol ether
Glycol ether) and any combination above-mentioned.
In one embodiment, polymerization reaction is micro-suspension polymerization, and when emulsifier is using anionic emulsifier, can
It is selectively added assistant for emulsifying agent.In a concrete example, assistant for emulsifying agent includes free blubber alcohol, cholesterine, fatty alcohol, fat
Acid, alcohol alcoxylates and polyglycol ether and any combination above-mentioned.
In step 110 the first obtained polyvinyl chloride emulsion the degree of polymerization (degree of polymerization,
It DP) is 700 to 1800, preferably 700 to 1500, more preferably 1000 to 1500.If the degree of polymerization of the first polyvinyl chloride emulsion is too
It is low, it is, for example, less than 700, then its mechanical strength is low, is unfavorable for subsequent applications；Conversely, 1800 are greater than if the degree of polymerization is too high,
The foam bubble size for being then subsequently used for the foamed material of production is larger and uniformity is bad.
Then, continue step 120, it is cellulose nano-fibrous to the addition of the first polyvinyl chloride emulsion, to obtain second
Polyvinyl chloride emulsion.Adding cellulose nano-fibrous obtained polyvinyl chloride emulsion facilitates the hair of subsequent production foamed material
Steep effect.Weight based on the first polyvinyl chloride emulsion be 100wt%, cellulose nano-fibrous content be 0.1wt% extremely
5.0wt%, preferably 0.2wt% are to 3.0wt%, more preferably 0.5wt% to 2.0wt%.If addition is cellulose nano-fibrous
Content is too low, such as less than 0.1wt%, then hair of the second polyvinyl chloride emulsion obtained for subsequent made foamed material
Bubble effect is not benefited significantly；Conversely, if cellulose nano-fibrous content is too high, it is greater than 5.0wt%, obtained second
When polyvinyl chloride emulsion is applied to foamed material, foaming effect is not made to have more obvious gain effect, therefore excessive cellulose
Nanofiber is only to increase cost on foot.In one embodiment, cellulose nano-fibrous average diameter is 4nm to 500nm, preferably
4nm to 100nm.
Then, step 130 is carried out, step is dried to the second polyvinyl chloride emulsion, to obtain PVC emulsifying powder.
In one embodiment, drying steps may be, for example, spray drying process, be after being atomized the second polyvinyl chloride emulsion, with high temperature sky
Gas contact, and moisture is vaporized, to obtain dry PVC emulsifying powder.In one embodiment, PVC emulsifying powder
Haze value is less than 2mg/10g, is preferably less than 1mg/10g, is more preferably less than 0.5mg/10g.
By PVC emulsifying powder obtained by method 100 with plasticizer, stabilization agent, foaming agent, filler material and choosing
Selecting property addition coloring material for mixing after, can by mixed paste at specific thicknesses after, carry out heating baking molding, be made hair
Foam material.When due to making PVC emulsifying powder using method 100, thickener melt viscosity with higher, thus it is made
Foamed material can have a good foaming effect, that is, there is good surface fineness, and the size of foam bubble is small and equal
Evenness is good.In general, the PVC emulsifying powder of the degree of polymerization higher (such as 1500 or more), foaming effect is bad, however
After addition is cellulose nano-fibrous, the foaming effect of made foamed material has the effect of obviously optimizing.Furthermore method
The haze value of PVC emulsifying powder made from 100 is low, therefore the foamed material made is suitably applied the interior material of automobile.
Illustrate application of the invention following with several embodiments, however, it is not to limit the invention, skill of the present invention
Technical staff in art field, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations.
Embodiment 1 to 4 and comparative example 1 to 2
Embodiment 1 is that vinyl chloride monomer and emulsifier are carried out polymerization reaction with seed emulsion polymerization method, polychlorostyrene is made
Vac emulsion, wherein the degree of polymerization of polyvinyl chloride emulsion is 1500.Weight based on vinyl chloride monomer is 100wt%, embodiment 1
Emulsifier additive amount be 1.0wt%.Then, by polyvinyl chloride emulsion vinyl chloride monomer removing after, add 0.5wt% and
Average diameter is the cellulose nano-fibrous of 4nm to 100nm, is uniformly dispersed in polyvinyl chloride emulsion to cellulose nano-fibrous
Afterwards, spray drying step is carried out, to obtain PVC emulsifying powder.
Embodiment 2 to 4 and comparative example 1 to 2 are all using processing procedure same as Example 1, and difference is polymerization
(seed emulsion polymerization method or micro-suspension polymerization), emulsifier additive amount, the degree of polymerization of polyvinyl chloride and cellulose Nanowire
The additive amount of dimension, as shown in the following Table 1, wherein comparative example 1 to 2 neither adds cellulose nano-fibrous.
Viscosity test
PVC emulsifying powder obtained by embodiment 1 to 4 and comparative example 1 to 2 is subjected to Type B viscosity test respectively.Type B
The testing procedure of viscosity is that the weight based on PVC emulsifying powder is 100 parts, the diisononyl phthalate of 60 parts of addition
(diisononyl phthalate, DINP) is mixed, then, about 25 DEG C at a temperature of storage 2 hours after, then carry out B
The test of type viscosity.The Type B viscosity test results of embodiment 1 to 4 and comparative example 1 to 2 are as shown in the following Table 1.
Haze value test
PVC emulsifying powder obtained by embodiment 1 to 4 and comparative example 1 to 2 is carried out to the test of haze value respectively.Mist
The test method of change value is tested according to the method for DIN75201-B.Firstly, taking the PVC emulsifying powder 10 after drying
Gram be attached to glass bottom, after taking a piece of aluminium foil and measuring its weight, aluminium foil be put on glass, it is bright down, with
Glass plate covers glass.Then, the coldplate of 21 DEG C of recirculated water is covered, and is heated in the thermostatic oil bath that temperature is 100 DEG C
16 hours, then volatile matter caused by test substance can condense on aluminium foil.Then, that aluminium foil is placed in drying box 4 is small
When, to avoid condensed water is contained in measured weight.Compare weight of the aluminium foil before and after being tested, weight difference is
The haze value of test substance.Embodiment 1 to 4 and the result of the haze value of comparative example 1 to 2 test are also depicted in table 1.
Foaming effect
After PVC emulsifying powder obtained by embodiment 1 to 4 and comparative example 1 to 2 is foamed respectively, its table is observed
Face fineness, and observe using scanning electron microscope the section of its foamed material, to detect the size and of foam bubble
Evenness.It is 100 parts that foaming formulation as used herein, which is with the weight of PVC emulsifying powder, the phthalic acid two of 75 parts of addition
Different nonyl ester, 3.5 parts of foaming agent, 30 parts as the calcium carbonate of filler and 2.4 parts of sodium/zinc stabilization agent, after being mixed
Paste at thickness about 0.4mm, and 230 DEG C at a temperature of baking 80 seconds after, foam, recycle scanning electron
Micro- sem observation.
According to the size and the uniformity of surface fineness, foam bubble after foaming, to determine foaming effect, embodiment 1
Foaming effect to 4 and comparative example 1 to 2 is as shown in table 1." excellent " expression foaming effect in table 1 takes into account that surface is careful, abscess ruler
It is very little small and uniform；"available" indicates that the uniformity of abscess is poor, and does not have holes；" poor " expression abscess-size is big, uneven, and has
Holes phenomenon, and then cause surface fineness bad.
Table 1
It can be seen that by 1 result of table, comparative example 1 is not added with cellulose nano-fibrous but more due to addition emulsifier, and
So that it has good foaming effect after being foamed, but also result in the haze value mistake of the PVC emulsifying powder of comparative example 1
It is high.Comparative example 2 is equally not added with cellulose nano-fibrous, and emulsifier additive amount is lower, although therefore PVC emulsifying powder
Haze value is lower, but the foaming effect of the foamed material after being foamed is poor.In comparison, the polyvinyl chloride cream of embodiment 1 to 4
Changing foamed material obtained after powder is foamed all has good foaming effect, especially less in the additive amount of emulsifier
When, due to there is addition cellulose nano-fibrous, therefore obtained PVC emulsifying powder can not only have lower haze value, and
Foamed material after being foamed also has good foaming effect.
Embodiment 5 and comparative example 3 to 4
Embodiment 5 and comparative example 3 to 4 are also to utilize processing procedure same as Example 1, to make PVC emulsifying powder,
And the test of above-mentioned Type B viscosity and haze value is equally carried out, and to the foamed material after being foamed, utilize electronic display
The section of micro mirror observation foamed material.Fig. 2A to Fig. 2 C is to show that the foamed material of embodiment 5 and comparative example 3 to 4 cuts open respectively
The electron micrograph that the enlargement ratio in face is 40 times.Embodiment 5 and comparative example 3 are all addition 1.5wt% emulsifier, and institute
The degree of polymerization of PVC emulsifying powder obtained is 1500, and difference is only that embodiment 5 adds the cellulose Nanowire of 1wt%
Dimension, and comparative example 3 be not added with it is cellulose nano-fibrous.Comparative example 4 then for the emulsifier of addition 2.0wt% and does not add cellulose
Nanofiber, and the degree of polymerization of obtained PVC emulsifying powder is 1000.
Embodiment 5 and comparative example 3 are since the additive amount of emulsifier is close, therefore the haze value of PVC emulsifying powder obtained
Also close, respectively 0.35mg/10g and 0.36mg/10g.However, the emulsifier additive amount of comparative example 4 is higher, therefore comparative example 4
PVC emulsifying powder haze value be 3.8mg/10g, be much higher than embodiment 5 and comparative example 3.
It can be seen that by the electron micrograph of Fig. 2A and Fig. 2 B, compared to comparative example 3, the foam bubble ruler of embodiment 5
The very little small and uniformity is good.Furthermore it can be seen that by the electron micrograph of Fig. 2 C, the foaming effect of comparative example 4 is between implementation
It is because the emulsifier additive amount of comparative example 4 is higher and the degree of polymerization is smaller, although therefore not adding between example 5 and comparative example 3
Cellulose nano-fibrous, foaming effect is good compared with comparative example 3, but still the not embodiment 5 cellulose nano-fibrous if any addition.
According to above-described embodiment, the manufacturing method of PVC emulsifying powder provided by the invention passes through the cream of addition specific quantity
Agent, and the cellulose nano-fibrous of specific quantity is added, and make PVC emulsifying powder obtained that there is lower haze value.Again
Person, foamed material made by this PVC emulsifying powder, can have good foaming effect.
Although the present invention is disclosed as above with multiple embodiments, however, it is not to limit the invention, any in the present invention
The technical staff in the technical field, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations,
Therefore subject to protection scope of the present invention ought be defined depending on claim.
Claims (9)
1. a kind of manufacturing method of PVC emulsifying powder, which is characterized in that the manufacturing method includes:
Vinyl chloride monomer and emulsifier are subjected to polymerization reaction, to obtain the first polyvinyl chloride emulsion, wherein being based on the chloroethene
The weight of alkene monomer is 100wt%, and the content of the emulsifier is 0.5wt% to 2.0wt%, and first polyvinyl chloride is newborn
The degree of polymerization of liquid is 700 to 1800；
It is cellulose nano-fibrous to first polyvinyl chloride emulsion addition, to obtain the second polyvinyl chloride emulsion, wherein being based on
The weight of first polyvinyl chloride emulsion be 100wt%, the cellulose nano-fibrous content be 0.1wt% extremely
5.0wt%；And
Step is dried to second polyvinyl chloride emulsion, to obtain the PVC emulsifying powder.
2. the manufacturing method of PVC emulsifying powder as described in claim 1, which is characterized in that the described of the emulsifier contains
Amount is 0.5wt% to 1.5wt%.
3. the manufacturing method of PVC emulsifying powder as described in claim 1, which is characterized in that the polyvinyl chloride emulsion
The degree of polymerization is 700 to 1500.
4. the manufacturing method of PVC emulsifying powder as described in claim 1, which is characterized in that the polymerization reaction is emulsification
Polymerization, micro-suspension polymerization or mixing method.
5. the manufacturing method of PVC emulsifying powder as described in claim 1, which is characterized in that described cellulose nano-fibrous
The content be 0.2wt% to 3.0wt%.
6. the manufacturing method of PVC emulsifying powder as described in claim 1, which is characterized in that described cellulose nano-fibrous
Average diameter be 4nm to 500nm.
7. the manufacturing method of PVC emulsifying powder as described in claim 1, which is characterized in that the emulsifier is anion
Type emulsifier and/or nonionic emulsifier.
8. a kind of PVC emulsifying powder, which is characterized in that the PVC emulsifying powder is using in claim 1 to 7
Obtained by any one method.
9. a kind of foamed material, which is characterized in that the foamed material includes PVC emulsifying powder according to any one of claims 8.
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| CN110862474A (en) * | 2019-11-08 | 2020-03-06 | 上海氯碱化工股份有限公司 | Low-atomization-value polyvinyl chloride paste resin and production method thereof |
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