CN109762374A - Colored aluminum pigment capable of being directly used for injection molding and preparation method thereof - Google Patents
Colored aluminum pigment capable of being directly used for injection molding and preparation method thereof Download PDFInfo
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- CN109762374A CN109762374A CN201910005766.1A CN201910005766A CN109762374A CN 109762374 A CN109762374 A CN 109762374A CN 201910005766 A CN201910005766 A CN 201910005766A CN 109762374 A CN109762374 A CN 109762374A
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Abstract
The invention discloses a colored aluminum pigment directly used for injection molding and a preparation method thereof. The color aluminum pigment is prepared from the following raw materials in percentage by weight: 40-70% of aluminum pigment coated by silicon dioxide, 10-20% of amino-terminated polyether resin, 10-20% of organic pigment and 10-20% of acrylic resin with negative electricity. The colored aluminum pigment composite particle can be used for direct injection molding, has simple process and can save cost; the damage to metal is reduced to the minimum by only one screw, and the metal feeling is strong; the aluminum pigment and the organic pigment are dispersed to the same degree by adopting a double-compatible dispersion system, and the injection molding finished product has no flooding.
Description
Technical field
The present invention relates to the technical field of surface of pigments processing more particularly to a kind of colours that can be directly used for injection molding
Aluminium pigment composite particles and preparation method thereof.
Background technique
Exempt from spraying process by being directly molded, while realizing plastic workpiece molding, obtains workpiece surface similar to coating
Effect.Production efficiency can be greatly improved by exempting from spraying process technology, avoids environmental pollution, reduces production cost.With
Country and Public environmental attitude enhancing, exempt from the attention that spraying technology increasingly obtains industry.From raw material, plastic formula, mould
Tool design, arrives Shooting Technique, and industrial chain upstream and downstream active development exempts to spray relevant technology and technique, is greatly promoted and exempts to spray
Application of the painting technology in every field.Currently, exempting from spraying technology has been applied to household electrical appliances and automotive field, and e.g., air-conditioning and electricity
Outcase of refrigerator, automobile door handle, automobile quarter badge etc..
Tradition does the product of metal colorful effect, is divided into two major classes, a kind of that aluminium pigment is first prepared into silver color Masterbatch,
Organic pigment is also prepared into Masterbatch, then mixes two kinds of Masterbatch and is pumped into metal colorful Masterbatch, finally again and engineering plastic
Expect mixed injection molding molding；Another kind of is that aluminium pigment and organic pigment are pre-mixed, and is then made into metal colorful Masterbatch, finally again
It is formed with engineering plastics mixed injection molding.Both techniques, process is all more complicated, at high cost, multiple to cross screw rod shearing, can make aluminium
Pigment bending is broken, and metallic luster is caused to decline, and blacks, and metal effect is had a greatly reduced quality.
Therefore, how to overcome and exempt to spray that aluminium pigment use process technique process is complicated, metallic luster is poor, loose colour defect
It is industry urgent problem to be solved.
Summary of the invention
The present invention exempts to spray that aluminium pigment use process technique process is complicated, metallic luster is poor, loose colour to solve tradition
Technical problem, propose a kind of high dispersive can be directly used for injection molding colored aluminum pigment and preparation method thereof.
A kind of colored aluminum pigment can be directly used for injection molding proposed by the present invention, by the original of following weight percents content
Material is formulated: aluminium pigment 40%-70%, the amine terminated polyether resin 10-20%, organic pigment 10- of coated with silica
20%, electronegative acrylic resin 10%-20%.
Preferably, the aluminium pigment of the coated with silica is made of the raw material of following weight percents content:
Aluminium 87%-92%, silica 8%-13%.
Preferably, the amine terminated polyether resin be Amino End Group polypropylene oxide ether, Amino End Group polyethylene glycol oxide ether or
Person is any of the copolymer amine terminated polyether that ammonification obtains at high temperature under high pressure of ethylene glycol and propylene glycol.
Preferably, the electronegative acrylic resin be methacrylic acid, acrylic acid, maleic acid, maleic anhydride, 2,
At least one of 2- dihydromethyl propionic acid and 2,2- dimethylolpropionic acid are the polymer or co-polymer that monomer is formed.
The invention also provides the preparation methods of the colored aluminum pigment described in one kind comprising following steps:
Step 1: the weight of each raw material is weighed according to the raw material proportioning of the colored aluminum pigment；
Step 2: amine terminated polyether resin described in one layer of the aluminium pigment surface cladding to the coated with silica；
Step 3: the organic pigment is added to the aluminium face for the coated with silica for being coated with amine terminated polyether resin
In material, it is uniformly mixed, obtains mixture；
Step 4: by electronegative acrylic resin described in one layer of the mixture cladding；
Step 5: the mixture of the electronegative acrylic resin of cladding being subjected to low-temperature grinding, obtains the Aluminium
Pigment.
Preferably, the encapsulation steps of the aluminium pigment progress silica are as follows: dispersing propylene glycol monomethyl ether for aluminum paste
In, ethyl orthosilicate and ammonium hydroxide is added, is heated to 85 DEG C and stirs 6 hours, N- (2- amino-ethyl) -3 is added after completion of the reaction
TSL 8330 and deionized water stir 2 hours at room temperature, filter, washing obtains the silica packet
The aluminium pigment covered.
Preferably, the low-temperature grinding of the step 5 is by high-speed flow by a low-temperature crushing device by the mixing
Accelerating impact is expected on through the cooling stainless steel plate of liquid nitrogen, and cooling becomes fragile the mixture rapidly in knockout process, and
The colored aluminum pigment of even particle size is made in even crushing.
Preferably, the partial size of the colored aluminum pigment particle is between 20-100um.
Preferably, the low-temperature crushing device includes: the intermediate pipeline for being equipped with a region to narrow and the pipe that narrows
Hopper, the high-speed blower set on the pipeline one end, the one piece of liquid nitrogen set on the pipeline other end of road section connection are cooling not
Become rusty steel plate.
Colored aluminum pigment composite particles of the present invention can be used for directly being molded, and process is simple, cost-saved；It is only excessively primary
Screw rod, falls below the destruction to metal minimum, and metal sense is strong；Using double compatible dispersions, aluminium pigment and organic pigment
Equal extent dispersion, injection-molded finished not loose colour.
Detailed description of the invention
Fig. 1 is the golden powdery aluminium pigment composite particles of embodiment 1 and its injection molding exemplar；
Fig. 2 is 2 dark green powdery aluminium pigment composite particles of embodiment and its injection molding exemplar；
Fig. 3 is the ancient silver color powdery aluminium pigment composite particles of embodiment 3 and its injection molding exemplar；
Fig. 4 is the red powdery aluminium pigment composite particles of embodiment 4 and its injection molding exemplar.
Specific embodiment
A kind of colored aluminum pigment can be directly used for injection molding proposed by the present invention, by the original of following weight percents content
Material is formulated: aluminium pigment 40%-70%, the amine terminated polyether resin 10-20%, organic pigment 10- of coated with silica
20%, electronegative acrylic resin 10%-20%.According to different needs, different ratios of raw materials can choose to prepare colour
Aluminium pigment.Than different raw material proportioning as shown in the table:
Wherein, the aluminium pigment of the coated with silica is made of: aluminium the raw material of following weight percents content
87%-92%, silica 8%-13%.The amine terminated polyether resin can choose Amino End Group polypropylene oxide ether, end
The copolymer amine terminated polyether that ammonification obtains at high temperature under high pressure of amino polyethylene glycol oxide ether either ethylene glycol and propylene glycol
It is any.Organic pigment can select one or more of common organic pigment, such as No. 180 pigment yellows (PY180),
15:3 pigment blue (PB150), No. 254 paratoneres, No. 7 naphthol greens etc..Electronegative acrylic resin can be metering system
At least one of acid, acrylic acid, maleic acid, maleic anhydride, 2,2- dihydromethyl propionic acid and 2,2- dimethylolpropionic acid are single
The polymer or co-polymer that body is formed.Electronegative acrylic resin is methacrylic acid, acrylic acid, maleic acid, maleic acid
At least one of acid anhydride, 2,2- dihydromethyl propionic acid and 2,2- dimethylolpropionic acid are the polymer or combined polymerization that monomer is formed
Object.
The invention also provides the preparation methods of the colored aluminum pigment described in one kind, and its step are as follows:
Step 1: the weight of each raw material is weighed according to the raw material proportioning of the colored aluminum pigment；
Step 2: amine terminated polyether resin described in one layer of the aluminium pigment surface cladding to the coated with silica；
Step 3: the organic pigment is added to the aluminium face for the coated with silica for being coated with amine terminated polyether resin
In material, it is uniformly mixed, obtains mixture；
Step 4: by electronegative acrylic resin described in one layer of the mixture cladding；
Step 5: the mixture of the electronegative acrylic resin of cladding being subjected to low-temperature grinding, obtains the Aluminium
Pigment.
Wherein, preparing the aluminium pigment of the cladding of silica, steps are as follows: dispersing aluminum paste in propylene glycol monomethyl ether, adds
Enter ethyl orthosilicate and ammonium hydroxide, be heated to 85 DEG C and stir 6 hours, N- (2- amino-ethyl) -3 aminopropans are added after completion of the reaction
Base trimethoxy silane and deionized water stir 2 hours at room temperature, filter, are washed to obtain the dioxy with propylene glycol monomethyl ether
The aluminium pigment of SiClx cladding.
Wherein, the cryogenic crushing process of the step 5 is to be passed through high speed gas with high-speed blower in one section of metallic conduit
Stream, in the duct between have a region to narrow suddenly, one hopper of connection, pipeline end connects the cooling stainless steel of one piece of liquid nitrogen
Plate.The mixture particle for coating electronegative acrylic resin is put into hopper, these mixture particles can be by high speed after leaking down
Air-flow intake line simultaneously accelerates to strike forward through on the cooling stainless steel plate of liquid nitrogen, mixture particle is fast in knockout process
Quickly cooling but becomes fragile, and uniformly crushes, and the colored aluminum pigment of even particle size is made.Adjust the speed and stainless steel plate of air-flow
Temperature can control the size of obtained colored aluminum pigment particle, make the partial size of colored aluminum pigment particle between 20-100um, both
It is facilitated uniformly to mix directly injection molding with plastic pellet, and will not fugitive dust.
Below with reference to embodiment, the present invention is further illustrated:
Embodiment 1:
The aluminum paste for taking 105g equivalent aluminium, is scattered in 480g propylene glycol monomethyl ether, is added 24g ethyl orthosilicate, 16ml, and 28%
Ammonium hydroxide, be heated to 85 DEG C, be stirred to react 6h, be cooled to room temperature after completion of the reaction, be added 16mlN- (2- amino-ethyl)-
3 TSL 8330s (KH-792), 16ml deionized water stir 2h at room temperature, after completion of the reaction, filter, with third
The washing of glycol methyl ether, obtains by the aluminium pigment of aluminium 87%-92%, silica the 8%-13% coated with silica constituted
120g。
Amino End Group polypropylene oxide ether resin 30g is mixed with the aluminium pigment 120g of coated with silica again, stirs 30 points
Clock is added 17g and No. 254 red pigment (BASF LW 3840) 3g of No. 180 pigment yellows (Clariant PV FAST HG) and is stirred for 2
Hour, it adds the electronegative acrylic resin of 30g and stirs 1 hour, after gained green aluminium pigment is squeezed into strips, using
Low-temperature grinding obtains golden powdery aluminium pigment composite particles.
Embodiment 2:
The aluminum paste for taking 70g equivalent aluminium, is scattered in 480g propylene glycol monomethyl ether, is added 24g ethyl orthosilicate, 16ml, and 28%
Ammonium hydroxide, be heated to 85 DEG C, be stirred to react 6h, be cooled to room temperature after completion of the reaction, be added 16mlN- (2- amino-ethyl)
- 3 TSL 8330s (KH-792), 16ml deionized water stir 2h at room temperature, after completion of the reaction, filter, with third
The washing of glycol methyl ether, obtains by the aluminium pigment 80g of aluminium 87%-92%, silica the 8%-13% coated with silica constituted.
Amino End Group polypropylene oxide ether resin 40g is mixed with the aluminium pigment 80g of coated with silica again, stirs 30 points
Clock is added 20g and No. 7 naphthol green (BASF Green K 8730) 20g of No. 180 pigment yellows (Clariant PV FAST HG) and stirs again
It mixes 2 hours, adds the electronegative acrylic resin of 40g and stir 1 hour, after gained green aluminium pigment is squeezed into strips, then
Low-temperature grinding obtains dark green powdery aluminium pigment composite particles.
Embodiment 3:
The aluminum paste for taking 80g equivalent aluminium, is scattered in 480g propylene glycol monomethyl ether, is added 24g ethyl orthosilicate, 16ml, and 28%
Ammonium hydroxide, be heated to 85 DEG C, be stirred to react 6h, be cooled to room temperature after completion of the reaction, be added 16mlN- (2- amino-ethyl)
- 3 TSL 8330s (KH-792), 16ml deionized water stir 2h at room temperature, after completion of the reaction, filter, with third
The washing of glycol methyl ether, obtains by the aluminium pigment 92g of aluminium 87%-92%, silica the 8%-13% coated with silica constituted.
Amino End Group polypropylene oxide ether resin 30g is mixed with the aluminium pigment 92g of coated with silica again, stirs 30 points
Clock, No. 6 pigment black (Cabot 660R) 20g and 15:3 pigment blues (BASF Blue K 7090) 4g is added, and to be stirred for 2 small
When, it adds the electronegative acrylic resin of 30g and stirs 1 hour, after gained green aluminium pigment is squeezed into strips, then low temperature powder
It is broken, obtain ancient silver color powdery aluminium pigment composite particles.
Embodiment 4:
The aluminum paste for taking 90g equivalent aluminium, is scattered in 480g propylene glycol monomethyl ether, is added 24g ethyl orthosilicate, 16ml, and 28%
Ammonium hydroxide, be heated to 85 DEG C, be stirred to react 6h, be cooled to room temperature after completion of the reaction, be added 16mlN- (2- amino-ethyl)
- 3 TSL 8330s (KH-792), 16ml deionized water stir 2h at room temperature, after completion of the reaction, filter, with third
The washing of glycol methyl ether.It obtains by the aluminium pigment of aluminium 87%-92%, silica the 8%-13% coated with silica constituted
103g。
Amino End Group polypropylene oxide ether resin 30g is mixed with the aluminium pigment 103g of coated with silica again, stirs 30 points
Clock is added 15g and No. 180 pigment yellow of No. 254 red pigments (BASF LW 3840) (Clariant PV FAST HG) 5g, adds
The electronegative acrylic resin of 30g stirs 1 hour, after gained green aluminium pigment is squeezed into strips, then low-temperature grinding, it obtains red
Toner shape aluminium pigment composite particles.
In above-described embodiment, the speed of adjustable air-flow and the temperature of stainless steel plate control and colored aluminum pigment particle are made
Partial size between 20-100um.Not only it had been facilitated uniformly to mix directly injection molding with plastic pellet, but also will not fugitive dust.
It as shown in Figure 1 to 4, is the blocky and granular view of 1~embodiment of embodiment, 4 gained colored aluminum pigment.
With the value of hexagonal degree spectrophotometric color measurement instrument X-RITE measurement color, mark see the table below:
1 Gold of embodiment:
2 Lime of embodiment:
Embodiment 3:Old Silver
Embodiment 4:Red
In table, L value embodies the brightness of exemplar, and L value is higher, indicates that the angle reflected light is stronger, a, b value represents color
Tone；FI value embodies the metal-like of exemplar, and FI value is higher, and expression metal-like is stronger.
The metal-like of metallic pigments is stronger, and L value is bigger with the degree of angle change, and FI value is higher, no metal sense it is general
Logical moulding FI value is usually no more than 1.
Preparation section of the present invention is simple, cost-saved；Only cross a screw rod, the destruction to metal is fallen below it is minimum,
Metal sense is strong；Using double compatible dispersions, aluminium pigment and organic pigment equal extent are dispersed, injection-molded finished not loose colour.
Embodiment described above is primarily to illustrate creating conception of the invention, it is noted that for this field
Those of ordinary skill for, without departing from the inventive concept of the premise, various modifications and improvements can be made, these are all
It belongs to the scope of protection of the present invention.
Claims (9)
1. it is a kind of can be directly used for injection molding colored aluminum pigment, which is characterized in that its by following weight percents content raw material
Be formulated: the aluminium pigment 40%-70% of coated with silica, amine terminated polyether resin 10-20%, organic pigment 10-20%,
Electronegative acrylic resin 10%-20%.
2. colored aluminum pigment as described in claim 1, which is characterized in that the amine terminated polyether resin is Amino End Group polyoxy
The amine terminated polyether that the copolymer ammonification of change propylene ether, Amino End Group polyethylene glycol oxide ether either ethylene glycol and propylene glycol obtains
It is any.
3. colored aluminum pigment as described in claim 1, which is characterized in that the electronegative acrylic resin is methyl-prop
At least one of olefin(e) acid, acrylic acid, maleic acid, maleic anhydride, 2,2- dihydromethyl propionic acid and 2,2- dimethylolpropionic acid are
The polymer or co-polymer that monomer is formed.
4. colored aluminum pigment as described in claim 1, which is characterized in that the aluminium pigment of the coated with silica, by
The raw material of following weight percents content is constituted: aluminium 87%-92%, silica 8%-13%.
5. a kind of preparation method of colored aluminum pigment as described in claim 1 comprising following steps:
Step 1: the weight of each raw material is weighed according to the raw material proportioning of the colored aluminum pigment；
Step 2: amine terminated polyether resin described in one layer of the aluminium pigment surface cladding to the coated with silica；
Step 3: the organic pigment is added in the aluminium pigment for the coated with silica for being coated with amine terminated polyether resin,
It is uniformly mixed, obtains mixture；
Step 4: by electronegative acrylic resin described in one layer of the mixture cladding；
Step 5: the mixture of the electronegative acrylic resin of cladding being subjected to low-temperature grinding, obtains the Aluminium face
Material.
6. preparation method as claimed in claim 5, which is characterized in that the aluminium pigment carries out the encapsulation steps of silica such as
Under: it disperses aluminum paste in propylene glycol monomethyl ether, ethyl orthosilicate and ammonium hydroxide is added, be heated to 85 DEG C and stir 6 hours, reaction
After N-(2- amino-ethyl is added) -3 TSL 8330s and deionized water, stir 2 hours, take out at room temperature
Filter, washing obtain the aluminium pigment of the coated with silica.
7. preparation method as claimed in claim 5, which is characterized in that the low-temperature grinding of the step 5 is by a low temperature powder
By high-speed flow by the mixture accelerating impact to the stainless steel plate cooled down through liquid nitrogen, the mixture exists crushing device
Cooling becomes fragile rapidly in knockout process, and uniformly crushes, and the colored aluminum pigment of even particle size is made.
8. preparation method as claimed in claim 7, which is characterized in that the partial size of the colored aluminum pigment particle is in 20-100um
Between.
9. preparation method as claimed in claim 7, which is characterized in that the low-temperature crushing device includes: intermediate equipped with one
The pipeline in the region to narrow, the hopper being connected to the duct section that narrows, set on the pipeline one end high-speed blower, be set to should
The cooling stainless steel plate of one piece of liquid nitrogen of the pipeline other end.
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Cited By (2)
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| CN111073193A (en) * | 2019-12-26 | 2020-04-28 | 河南兴安新型建筑材料有限公司 | Preparation method of polymer/SiO 2/Al pigment |
| CN111961356A (en) * | 2020-08-04 | 2020-11-20 | 安徽天易金属新材料有限公司 | Self-healing all-solid sandy water-based aluminum paste and preparation method thereof |
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| CN111961356A (en) * | 2020-08-04 | 2020-11-20 | 安徽天易金属新材料有限公司 | Self-healing all-solid sandy water-based aluminum paste and preparation method thereof |
| CN111961356B (en) * | 2020-08-04 | 2024-02-23 | 安徽天易金属新材料有限公司 | Self-healing all-solid sandy water-based aluminum silver paste and preparation method thereof |
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| CN109762374B (en) | 2021-05-25 |
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