CN108003383B - A kind of PVC plastic preparation method for brightening winnofil - Google Patents
A kind of PVC plastic preparation method for brightening winnofil Download PDFInfo
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
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- C08L27/00—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 a halogen; Compositions of derivatives of such polymers
- C08L27/02—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 a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—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 a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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Abstract
The invention discloses a kind of PVC plastic preparation methods for brightening winnofil, the following steps are included: Step 1: in the carbonation process for preparing winnofil, when carbonation rate reaches 60~80%, reducing agent and sodium isoascorbate is added, continues carbonization to pH less than 7.0；Step 2: calcium carbonate serosity that carbonization is completed is delivered to aging tank, still aging 12~for 24 hours；Step 3: opening the agitating device of aging tank, calcium carbonate serosity after ageing concentration is stirred evenly, it is then sent to activation kettle and heats, activation kettle is set to be warming up to 70~90 DEG C, ten diester of maleic acid list is added, stirs 20~40 minutes, then adds odium stearate and 4,4 '~bis- (sodium disulfonate styryl) biphenyl stir 20~40 minutes；Step 4: modified calcium carbonate serosity successively to be carried out to filters pressing, drying, crushing to get brightening winnofil.The winnofil production PVC plastic product glossiness produced by the present invention that brightens is good, small, the stable product quality of color difference fluctuation.
Description
Technical field
The present invention relates to the whitening technology field of winnofil more particularly to a kind of PVC plastics with brightening precipitating carbonic acid
The preparation method of calcium.
Background technique
Winnofil has whiteness high, nontoxic, nonirritant, price is low as a kind of important chemical inorganic filler
The features such as honest and clean, makes it be widely used in the industries such as plastics, rubber, coating, sealant, ink and papermaking.
In PVC plastic processing industry, as the maximum filler of usage amount, it is high-strength that winnofil can assign PVC plastic
The characteristics such as degree, high rigidity, wear-resisting, ageing-resistant, fire retardant, corrosion-resistant, easy dyeing, however, color difference is unstable in white PVC product
Fixed, fluctuation is always that the sector is difficult to the problem overcome greatly.Its reason is mainly from following two aspect:
First, the difference of calcium carbonate form and aspect.Winnofil generally uses lime stone as raw material, through calcining, digestion, old
After the multiple tracks preparation sections such as change, carbonating, surface modification, press dewatering, drying, crushing, calcium carbonate finished product is obtained.However, by
It is also different in the content of the intrinsic difference of different sources lime stone quality, the foreign metals such as magnesium, iron, manganese, thus prepare
Calcium carbonate finished product form and aspect differ greatly.
The stability of second, PVC processability.Except the hue difference that calcium carbonate raw material impurity causes is unusual, PVC material itself
Thermal decomposition behavior is the main factor for causing PVC product form and aspect and changing.When formula system mobility is poor, processing electric current
When bigger than normal, PVC thermal decomposition aggravation often leads to the jaundice of product form and aspect, and this problem is generally also the surface by calcium carbonate
Caused by science and engineering skill.
Chinese invention patent CN1544535A provides a kind of purification method of whitening of calcium carbonate especially winnofil,
Ca (OH) is handled by chemical method2Suspension or CaCO3Clinker slurry, removing in slurries is in color base, to increase product brightness,
Whiteness and purity are improved, while improving raw material grade and resource utilization.The purification method of whitening of this calcium carbonate are as follows: in alkalinity
Under the conditions of into the suspension slurry of calcium carbonate be added be equivalent to its weight 0.01~0.5% reducing agent, screening agent, chelating agent its
Middle one or more, pulp density 8~50%, 30~90 DEG C of temperature, stir process 30~120 minutes；Filtering is dried, sieving
To obtain the final product.However, the preparation method can only inhibit the form and aspect of calcium carbonate itself to a certain extent, but in PVC material application, but
It is difficult to improve the chromatic aberration caused by decomposing because of PVC.
Chinese invention patent CN101570342A is disclosed and a kind of is prepared silicone sealant using low-ore grade limestone wet-process
The method of high-whiteness nanometer calcium carbonate special.Used technical solution are as follows: by limestone calcination and be crushed, calcium oxide is made:
Sizing screening, good calcium oxide then enter next process；It takes quality oxide calcium by the digestion of revolution digestion machine, remove iron, change
Brighten, heat preservation is aged, controls temperature and concentration and adds crystal control agent and carry out bubbling carbonizing, secondary ageing, then secondary carbon
Change, wet process is twice-modified, finally obtains required nanometer calcium carbonate through filter-press dehydration, drying, crushing, classification, packaging again and produces
Product.Chemical whitening described above is equally the binding mode using reducing agent and chelating agent, is only capable of inhibiting to a certain extent
The form and aspect of calcium carbonate itself, but it is very little to the improvement result of PVC product form and aspect.
In conclusion the winnofil prepared using chemical whitening method, is typically only capable to increase calcium carbonate to a certain extent
Whiteness, but can not improve and stablize the whiteness of product in PVC production process.
Summary of the invention
Technical problem to be solved by the invention is to provide one kind can effectively increase white PVC product whiteness, glossiness
PVC plastic with brightening the preparation method of winnofil.
In order to solve the above technical problems, the technical scheme is that a kind of PVC plastic system for brightening winnofil
Preparation Method, comprising the following steps:
Step 1:, when carbonation rate reaches 60~80%, reducing agent is added in the carbonation process for preparing winnofil
And sodium isoascorbate, continue carbonization to pH less than 7.0；
Step 2: the calcium carbonate serosity that carbonization is completed is delivered to aging tank, and keep calcium carbonate serosity quiet in aging tank
Ageing 12~for 24 hours is set, supernatant liquor is then transported to Sewage treatment pond with dredge pump and is handled；
Step 3: opening the agitating device of aging tank, the calcium carbonate serosity after ageing concentration is stirred evenly, is then conveyed
To activation kettle, activation kettle is made to be warming up to 70~90 DEG C, ten diester of maleic acid list is added, stirred 20~40 minutes, then add
Odium stearate and 4,4 '~bis- (sodium disulfonate styryl) biphenyl, continues stirring 20~40 minutes, completes activation modification processing；
Step 4: modified calcium carbonate serosity successively to be carried out to filters pressing, drying, crushing to get brightening winnofil.
As a preferred technical solution, the following steps are included:
Step 1: in the carbonation process for preparing winnofil, when carbonation rate reaches 70%, reducing agent and different is added
Sodium ascorbate, continuing to be carbonized to pH is 6.8；
Step 2: the calcium carbonate serosity that carbonization is completed is delivered to aging tank, and keep calcium carbonate serosity quiet in aging tank
Ageing 18h is set, supernatant liquor is then transported to Sewage treatment pond with dredge pump and is handled；
Step 3: opening the agitating device of aging tank, the calcium carbonate serosity after ageing concentration is stirred evenly, is then conveyed
To activation kettle, activation kettle is made to be warming up to 85 DEG C, ten diester of maleic acid list is added, stirred 30 minutes, then add odium stearate
With 4,4 '~bis- (sodium disulfonate styryl) biphenyl continue stirring 30 minutes, complete activation modification processing；
Step 4: modified calcium carbonate serosity successively to be carried out to filters pressing, drying, crushing to get brightening winnofil.
As a preferred technical solution, in the step 4, after calcium carbonate serosity carries out filters pressing, drying, crushing, using
It is classified process.
The winnofil being prepared as a preferred technical solution, is nanometer grade calcium carbonate, the nanoscale
The specific surface area of calcium carbonate is 16~30m2/g。
The winnofil being prepared as a preferred technical solution, is micron grade light-weight calcium carbonate, described micro-
The settling volume of meter level precipitated calcium carbonate is 2.0~3.2ml/g.
As a preferred technical solution, the reducing agent be one of sodium hydrosulfite, sodium pyrosulfite, thiourea dioxide or
Any several combinations.
As improvement to above-mentioned technical proposal, the dosage of the reducing agent is the 0.2 of raw material calcium carbonate butt quality
~0.5%；
The dosage of the sodium isoascorbate is the 0.1~0.3% of raw material calcium carbonate butt quality；
The dosage of ten diester of maleic acid list is the 0.5~2.0% of raw material calcium carbonate butt quality；
The dosage of the odium stearate is the 0.3~1.5% of raw material calcium carbonate butt quality；
The dosage of 4,4 '-bis- (sodium disulfonate styryl) biphenyl be raw material calcium carbonate butt quality 0.1~
0.5%.
By adopting the above-described technical solution, the beneficial effects of the present invention are: using precipitating is brightened made from above-mentioned technique
Calcium carbonate production PVC plastic product has the advantage that compared with calcium carbonate common in the market
1, there is good workability, excellent in mechanical performance good with polyvinyl chloride resin compatibility in PVC plastic processing；
2, there is good brightening effect to white PVC product, glossiness is good；
3, color difference fluctuates small, stable product quality in PVC product production process；
4, present invention process is simple and effective, and cost of investment is low, has preferable economic benefit and social benefit.
Specific embodiment
Below with reference to embodiment, the present invention is further explained.In the following detailed description, it is only retouched by way of explanation
Certain exemplary embodiments of the invention are stated.Undoubtedly, those skilled in the art will recognize, without departing from
In the case where the spirit and scope of the present invention, the described embodiments may be modified in various different ways.Therefore,
Description is regarded as illustrative in nature, and is not intended to limit the scope of the claims.
The invention discloses a kind of PVC plastic preparation methods for brightening winnofil, comprising the following steps:
Step 1:, when carbonation rate reaches 60~80%, reducing agent is added in the carbonation process for preparing winnofil
And sodium isoascorbate, continue carbonization to pH less than 7.0；
Step 2: the calcium carbonate serosity that carbonization is completed is delivered to aging tank, and keep calcium carbonate serosity quiet in aging tank
Ageing 12~for 24 hours is set, supernatant liquor is then transported to Sewage treatment pond with dredge pump and is handled；
Step 3: opening the agitating device of aging tank, the calcium carbonate serosity after ageing concentration is stirred evenly, is then conveyed
To activation kettle, activation kettle is made to be warming up to 70~90 DEG C, ten diester of maleic acid list is added, stirred 20~40 minutes, then add
Odium stearate and 4,4 '~bis- (sodium disulfonate styryl) biphenyl, continues stirring 20~40 minutes, completes activation modification processing；
Step 4: modified calcium carbonate serosity successively to be carried out to filters pressing, drying, crushing to get brightening winnofil.
The reducing agent in the present embodiment is one of sodium hydrosulfite, sodium pyrosulfite, thiourea dioxide or any several
Kind combination, and said components, when being applied in combination, constituent content can be adjusted arbitrarily.
The dosage of heretofore described reducing agent is the 0.2~0.5% of raw material calcium carbonate butt quality；It is described different anti-bad
The dosage of hematic acid sodium is the 0.1~0.3% of raw material calcium carbonate butt quality；The dosage of ten diester of maleic acid list is former material
Expect the 0.5~2.0% of calcium carbonate butt quality；The dosage of the odium stearate be raw material calcium carbonate butt quality 0.3~
1.5%；The dosage of 4,4 '-bis- (sodium disulfonate styryl) biphenyl be raw material calcium carbonate butt quality 0.1~
0.5%.
Below by specific embodiment, the present invention is described in detail.
Embodiment one:
The present embodiment is to prepare micron grade light-weight calcium carbonate carbon, it is specific the preparation method comprises the following steps:
Step 1:, when carbonation rate reaches 70%, the two of 0.3% are added in the carbonation process for preparing winnofil
Aminoiminomethanesulfonic acid and 0.1% sodium isoascorbate, continue carbonization to pH be 6.8 when complete reaction, be made product settling volume
It is 2.6；
Step 2: the calcium carbonate serosity that carbonization is completed is delivered to aging tank, and keep calcium carbonate serosity quiet in aging tank
Ageing 18h is set, supernatant liquor is then transported to Sewage treatment pond with dredge pump and is handled；
Step 3: opening the agitating device of aging tank, the calcium carbonate serosity after ageing concentration is stirred evenly, is then conveyed
To activation kettle, the heating function of activation kettle is opened, activation kettle is made to be warming up to 85 DEG C, 0.6% ten diester of maleic acid list is added, stirs
It mixes 30 minutes, then adds 0.4% odium stearate and the 4 of 0.3%, 4 '~bis- (sodium disulfonate styryl) biphenyl, after
Activation modification processing is completed in continuous stirring 30 minutes；
Step 4: modified calcium carbonate serosity successively to be carried out to filters pressing, drying, crushing are brightened to get PVC plastic is dedicated
Winnofil.
Embodiment two:
The present embodiment is to prepare micron grade light-weight calcium carbonate carbon, it is specific the preparation method comprises the following steps:
Step 1: in the carbonation process for preparing winnofil, when carbonation rate reaches 70%, be added 0.2% also
Former agent and 0.2% sodium isoascorbate, continue carbonization to pH be 6.8 when complete reaction, be made product settling volume be
3.0；
Step 2: the calcium carbonate serosity that carbonization is completed is delivered to aging tank, and keep calcium carbonate serosity quiet in aging tank
Ageing 18h is set, supernatant liquor is then transported to Sewage treatment pond with dredge pump and is handled；
Step 3: opening the agitating device of aging tank, the calcium carbonate serosity after ageing concentration is stirred evenly, is then conveyed
To activation kettle, the heating function of activation kettle is opened, activation kettle is made to be warming up to 85 DEG C, 0.8% ten diester of maleic acid list is added, stirs
It mixes 30 minutes, then adds 0.3% odium stearate and the 4 of 0.2%, 4 '~bis- (sodium disulfonate styryl) biphenyl, after
Activation modification processing is completed in continuous stirring 30 minutes；
Step 4: modified calcium carbonate serosity successively to be carried out to filters pressing, drying, crushing are brightened to get PVC plastic is dedicated
Winnofil.
Embodiment three:
The present embodiment is to prepare nanometer grade calcium carbonate, it is specific the preparation method comprises the following steps:
Step 1:, when carbonation rate reaches 60%, the two of 0.5% are added in the carbonation process for preparing winnofil
Aminoiminomethanesulfonic acid and 0.2% sodium isoascorbate, continue carbonization to pH be 6.8 when complete reaction, the ratio table of nanometer grade calcium carbonate
Area is 18.9m2/g；
Step 2: the calcium carbonate serosity that carbonization is completed is delivered to aging tank, and keep calcium carbonate serosity quiet in aging tank
It sets ageing for 24 hours, supernatant liquor is then transported to Sewage treatment pond with dredge pump and is handled；
Step 3: opening the agitating device of aging tank, the calcium carbonate serosity after ageing concentration is stirred evenly, is then conveyed
To activation kettle, the heating function of activation kettle is opened, activation kettle is made to be warming up to 85 DEG C, 1.5% ten diester of maleic acid list is added, stirs
It mixes 30 minutes, then adds 0.6% odium stearate and the 4 of 0.5%, 4 '~bis- (sodium disulfonate styryl) biphenyl, after
Activation modification processing is completed in continuous stirring 30 minutes；
Step 4: modified calcium carbonate serosity successively to be carried out to filters pressing, drying, crushing are brightened to get PVC plastic is dedicated
Winnofil.
Example IV:
The present embodiment is to prepare nanometer grade calcium carbonate, it is specific the preparation method comprises the following steps:
Step 1:, when carbonation rate reaches 60%, the two of 0.4% are added in the carbonation process for preparing winnofil
Aminoiminomethanesulfonic acid and 0.2% sodium isoascorbate, continue carbonization to pH be 6.8 when complete reaction, the ratio table of nanometer grade calcium carbonate
Area is 23.4m2/g；
Step 2: the calcium carbonate serosity that carbonization is completed is delivered to aging tank, and keep calcium carbonate serosity quiet in aging tank
It sets ageing for 24 hours, supernatant liquor is then transported to Sewage treatment pond with dredge pump and is handled；
Step 3: opening the agitating device of aging tank, the calcium carbonate serosity after ageing concentration is stirred evenly, is then conveyed
To activation kettle, the heating function of activation kettle is opened, activation kettle is made to be warming up to 85 DEG C, 1.5% ten diester of maleic acid list is added, stirs
It mixes 30 minutes, then adds 1% odium stearate and the 4 of 0.5%, 4 '~bis- (sodium disulfonate styryl) biphenyl continue
Activation modification processing is completed in stirring 30 minutes；
Step 4: modified calcium carbonate serosity successively to be carried out to filters pressing, drying, crushing are brightened to get PVC plastic is dedicated
Winnofil.
The present invention in the course of the research, additionally uses other components to calcium carbonate serosity into activation modification processing is carried out, such as
Sodium isoascorbate is replaced using EDETATE SODIUM, two comparative examples and various embodiments of the present invention is now taken to carry out test data comparison
Explanation.
Comparative example 1:
Replace sodium isoascorbate to prepare micron grade light-weight calcium carbonate carbon using EDETATE SODIUM, it is specific the preparation method comprises the following steps:
Referring to the manufacturing condition of embodiment one, the micron order light calcium carbonate serosity that settling volume is 2.6 is prepared, so
0.3% thiourea dioxide and 0.1% EDETATE SODIUM are added afterwards, stirs 30 minutes；Then be added 1.3% odium stearate into
Row is activated, and activation time is 30 minutes；Again by the defeated successively progress filters pressing of modified slurries, drying, classification to get heavy to brightening
Shallow lake calcium carbonate product.
Comparative example 2:
Referring to the manufacturing condition of example IV, preparation specific surface area is 23m2The nanometer calcium carbonate slurries of/g or so,
Then 0.4% thiourea dioxide and 0.2% EDETATE SODIUM is added, stirs 30 minutes；Then 3.3% odium stearate is added
It is activated, activation time is 30 minutes；It is again that the defeated successively progress filters pressing of modified slurries, drying, classification is heavy to get brightening
Shallow lake calcium carbonate product.
Winnofil product will be brightened made from above four embodiments and two comparative examples to be formulated according to table -1 respectively
Prepare hard PVC product.
Table -1
| Raw material title | Mass fraction/part |
| PVC | 100 |
| Calcium-zinc composite stabilizing agent | 5.0 |
| ACR | 2.0 |
| CPE | 8.0 |
| Paraffin | 0.5 |
| Stearic acid | 0.3 |
| Monoglyceride | 0.3 |
| Calcium carbonate | 50 |
Table -2 is to carry out Mechanics Performance Testing to hard PVC referring to GB1040-79 and GB1043-79 standard, as a result
As shown in table -2:
Table -2
The results show that using winnofil prepared by the present invention, either micron grade light-weight calcium carbonate or nanoscale
Calcium carbonate brightens calcium carbonate compared to conventional method preparation, in PVC plastic application, not only has preferable mechanical property,
And color difference b* value is smaller, is conducive to the PVC for preparing white article.
It is described to receive when the winnofil being prepared is nanometer grade calcium carbonate in each embodiment of the invention
The specific surface area of meter level calcium carbonate is 16~30m2/g.The winnofil being prepared is micron grade light-weight calcium carbonate
When, the settling volume of the micron grade light-weight calcium carbonate is 2.0~3.2ml/g.
The present invention is and common in the market using brightening winnofil production PVC plastic product made from above-mentioned technique
Calcium carbonate is compared, and is had the advantage that
1, there is good workability, excellent in mechanical performance good with polyvinyl chloride resin compatibility in PVC plastic processing；
2, there is good brightening effect to white PVC product, glossiness is good；
3, color difference fluctuates small, stable product quality in PVC product production process；
4, present invention process is simple and effective, and cost of investment is low, has preferable economic benefit and social benefit.The above display
With describe basic principles and main features and advantages of the present invention of the invention.It should be understood by those skilled in the art that this hair
Bright to be not restricted to the described embodiments, the above embodiments and description only illustrate the principle of the present invention, is not taking off
Under the premise of from spirit and scope of the invention, various changes and improvements may be made to the invention, these changes and improvements, which are both fallen within, to be wanted
It asks in the scope of the invention of protection.The scope of the present invention is defined by the appended claims and its equivalents.
Claims (7)
1. a kind of PVC plastic preparation method for brightening winnofil, which comprises the following steps:
Step 1: in the carbonation process for preparing winnofil, when carbonation rate reaches 60~80%, reducing agent and different is added
Sodium ascorbate continues carbonization to pH less than 7.0；
Step 2: the calcium carbonate serosity that carbonization is completed is delivered to aging tank, and it is old to stand calcium carbonate serosity in aging tank
Change 12~for 24 hours, supernatant liquor is then transported to Sewage treatment pond with dredge pump and is handled；
Step 3: opening the agitating device of aging tank, the calcium carbonate serosity after ageing concentration is stirred evenly, work is then sent to
Change kettle, activation kettle is made to be warming up to 70~90 DEG C, ten diester of maleic acid list is added, stirs 20~40 minutes, then add tristearin
Sour sodium and 4,4 '~bis- (sodium disulfonate styryl) biphenyl, continues stirring 20~40 minutes, completes activation modification processing；
Step 4: modified calcium carbonate serosity successively to be carried out to filters pressing, drying, crushing to get brightening winnofil.
2. a kind of PVC plastic preparation method for brightening winnofil as described in claim 1, which is characterized in that including
Following steps:
Step 1: in the carbonation process for preparing winnofil, when carbonation rate reaches 70%, reducing agent and different anti-bad is added
Hematic acid sodium, continuing to be carbonized to pH is 6.8；
Step 2: the calcium carbonate serosity that carbonization is completed is delivered to aging tank, and it is old to stand calcium carbonate serosity in aging tank
Change 18h, supernatant liquor is then transported to Sewage treatment pond with dredge pump and is handled；
Step 3: opening the agitating device of aging tank, the calcium carbonate serosity after ageing concentration is stirred evenly, work is then sent to
Change kettle, activation kettle made to be warming up to 85 DEG C, ten diester of maleic acid list is added, stirs 30 minutes, then add odium stearate and 4,
4 '~bis- (sodium disulfonate styryl) biphenyl continue stirring 30 minutes, complete activation modification processing；
Step 4: modified calcium carbonate serosity successively to be carried out to filters pressing, drying, crushing to get brightening winnofil.
3. a kind of PVC plastic preparation method for brightening winnofil as claimed in claim 1 or 2, which is characterized in that institute
It states in step 4, after calcium carbonate serosity carries out filters pressing, drying, crushing, using classification process.
4. a kind of PVC plastic preparation method for brightening winnofil as claimed in claim 1 or 2, which is characterized in that system
The standby obtained winnofil is nanometer grade calcium carbonate, and the specific surface area of the nanometer grade calcium carbonate is 16~30m2/g。
5. a kind of PVC plastic preparation method for brightening winnofil as claimed in claim 1 or 2, which is characterized in that system
The standby obtained winnofil is micron grade light-weight calcium carbonate, and the settling volume of the micron grade light-weight calcium carbonate is 2.0
~3.2ml/g.
6. a kind of PVC plastic preparation method for brightening winnofil as claimed in claim 1 or 2, which is characterized in that institute
Stating reducing agent is one of sodium hydrosulfite, sodium pyrosulfite, thiourea dioxide or any two or more combination.
7. a kind of PVC plastic preparation method for brightening winnofil as claimed in claim 1 or 2, which is characterized in that institute
The dosage for stating reducing agent is the 0.2~0.5% of raw material calcium carbonate butt quality；
The dosage of the sodium isoascorbate is the 0.1~0.3% of raw material calcium carbonate butt quality；
The dosage of ten diester of maleic acid list is the 0.5~2.0% of raw material calcium carbonate butt quality；
The dosage of the odium stearate is the 0.3~1.5% of raw material calcium carbonate butt quality；
The dosage of 4,4 '-bis- (sodium disulfonate styryl) biphenyl be raw material calcium carbonate butt quality 0.1~
0.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711259322.8A CN108003383B (en) | 2017-12-04 | 2017-12-04 | A kind of PVC plastic preparation method for brightening winnofil |
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| CN102154926A (en) * | 2010-12-09 | 2011-08-17 | 山东轻工业学院 | Method for improving whiteness of paper |
| CN103370383A (en) * | 2011-02-18 | 2013-10-23 | 瓦克化学公司 | Paper coating compositions |
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| CN102154926A (en) * | 2010-12-09 | 2011-08-17 | 山东轻工业学院 | Method for improving whiteness of paper |
| CN103370383A (en) * | 2011-02-18 | 2013-10-23 | 瓦克化学公司 | Paper coating compositions |
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| Title |
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| 轻质碳酸钙增白研究;胡庆福 等;《非金属矿》;20021130;第10-12页 |
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Denomination of invention: A preparation method of whitening precipitated calcium carbonate for PVC plastics Effective date of registration: 20201130 Granted publication date: 20190625 Pledgee: Qingzhou Jinding sub branch of Weifang Bank Co.,Ltd. Pledgor: QINGZHOU YUXIN CALCIUM INDUSTRIAL Co.,Ltd. Registration number: Y2020980008603 |
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