CN105885376A - Flaky molding material and preparation method thereof - Google Patents
Flaky molding material and preparation method thereof Download PDFInfo
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- CN105885376A CN105885376A CN201610429310.4A CN201610429310A CN105885376A CN 105885376 A CN105885376 A CN 105885376A CN 201610429310 A CN201610429310 A CN 201610429310A CN 105885376 A CN105885376 A CN 105885376A
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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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/06—Unsaturated polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/504—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC] using rollers or pressure bands
- B29C70/506—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC] using rollers or pressure bands and impregnating by melting a solid material, e.g. sheet, powder, fibres
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- C—CHEMISTRY; METALLURGY
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Reinforced Plastic Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a flaky molding material. The flaky molding material comprises, by weight, 15-40 parts of modified unsaturated polyester resin, 4-10 parts of a low-shrinkage additive, 20-50 parts of modified calcium carbonate, 20-50 parts of aluminum hydroxide, 0.8-1.2 parts of a releasing agent, 0.2-0.4 part of a thickening agent, 0.1-0.4 part of a curing agent, 8-12 parts of continuous oriented glass fibers and 15-25 parts of short-cut glass fibers. The flaky molding material has excellent performance such as quite good mechanical strength, high pressure resistance, electric leakage resistance, flame resistance and high heat deflection temperature, the tensile strength of the flaky molding material is 170 MPa or above, the bending strength is 250 MPa or above, the impact strength (non-notched) is 170 KJ/m<2> or above, the material can be applied to large wind power generation blades and withstand challenges of a severe environmental condition and immediate loading, and long-time stable running of a machine set is guaranteed.
Description
Technical field
The invention belongs to composite insulating material preparation field, relate to a kind of sheet molding compound (Sheet Molding
Compound, SMC) and preparation method thereof, particularly relate to a kind of high intensity continuously-directional glass fiber and strengthen
High-strength sheet molding plastic and preparation method thereof.
Background technology
In recent years, energy-conserving and environment-protective and clean energy resource are increasingly paid attention to by the whole world, and wherein wind-powered electricity generation is as on the largest scale
One of regenerative resource of application advantage, is quickly increased in the whole world, and it is the fastest that China becomes growth rate
Country, at present, wind-power electricity generation is built in area in Xinjiang of China, the Inner Mongol, the Three Eastern Provinces, Ji Bei and Shandong etc.
Large-scale modern wind power base and supporting output engineering, will attach most importance to south and Middle Eastern future,
Greatly develop distributing wind-powered electricity generation, stable development offshore wind farm, thus wind electricity blade, wheel hub, cabin will be driven
The development of the composite products such as cover, kuppe.Through the early stage market competition with shuffle, wind-power electricity generation is gradually
Developing to high-power unit, thus it requires blade is more and more longer, wind sweeping area is bigger, and passes through structure optimization
Design, it is achieved the low load of blade and high efficiency combine.Wind electricity blade is the biggest, and the requirement to intensity is the highest,
Molding compound material is the main material of currently manufactured wind electricity blade, it is necessary to improve the intensity of molding compound material,
Adapt to the demand for development of wind-powered electricity generation industry.
Moulding compound mainly comprises sheet molding compound SMC, be eighties of last century grow up the sixties with glass
Fibre-reinforced polymer matrix composites.It is with different size unsaturated polyester resin as binding agent, with nothing
Alkali containing glass fibre is reinforcing material, and adds filler and various additive, obtains through professional equipment processing,
Belong to duroplastic moulding materials.It has that intensity is high, lightweight, corrosion-resistant and the feature such as electric insulation, and has
Having performance design freedom big, advantage easy to process, is one of widest composite in the whole world, extensively
It is applied to the various fields such as track traffic, household building, electrical engineering and electric apparatus, communal facility automobile making.In order to
Obtaining high performance SMC composite, the most many enterprises and research department were to resin and fibre in recent years
The characteristic of dimension is studied, to obtaining the material of excellent properties.But, the most it is not developed to full
The SMC material of the high mechanical properties that the big wind electricity blade of foot uses.
Summary of the invention
For the above-mentioned problems in the prior art, it is an object of the invention to provide a kind of sheet molding compound
And preparation method thereof, the sheet molding compound of the present invention has high intensity and has leakage the most high pressure resistant, resistance to
Electrically, the excellent properties such as flame resistance and heat distortion temperature be high, its hot strength is in more than 170MPa, bending
Intensity is at more than 250MPa, and impact strength (non-notch) is at 170KJ/m2Above, can be applicable to wind-force send out
The large-scale blade of electricity, is able to take severe environmental conditions and the test loaded immediately, it is ensured that unit is steady in a long-term
Ground runs.
For reaching above-mentioned purpose, the present invention by the following technical solutions:
" continuously-directional glass fiber " of the present invention, is the one in continuous glass fibre, glass therein
Fiber molecule aligns.
First aspect, the present invention provides a kind of sheet molding compound, and described sheet molding compound is counted by weight and contained
There is a following raw material components:
The parts by weight of described modified unsaturated polyester resin are 15～40 parts, can be such as 15 parts, 18 parts,
20 parts, 23 parts, 26 parts, 30 parts, 33 parts, 35 parts or 40 parts etc..
The parts by weight of described low shrinkage additive are 4～10 parts, can be such as 4 parts, 6 parts, 7 parts, 8
Part, 8.5 parts or 10 parts etc..
Low shrinkage additive (Low Shrinkage Addictive, LSA) refers to reduce in machine-shaping
During a class additive of resin shrinkage rate.
The parts by weight of described modified calcium carbonate are 20～50 parts, can be such as 20 parts, 23 parts, 25 parts,
27 parts, 30 parts, 32 parts, 36 parts, 40 parts, 43 parts, 47 parts or 50 parts etc..
The parts by weight of described aluminium hydroxide are 20～50 parts, can be such as 20 parts, 25 parts, 28 parts, 30
Part, 32.5 parts, 35 parts, 40 parts, 43 parts or 50 parts etc..
The parts by weight of described releasing agent are 0.8～1.2 part, can be such as 0.8 part, 0.9 part, 1 part, 1.1
Part or 1.2 parts etc..
The parts by weight of described firming agent are 0.1～0.4 part, such as, can be 0.1 part, 0.2 part, 0.3 part or 0.4
Part etc..
The parts by weight of described continuously-directional glass fiber are 8～12 parts, can be such as 8 parts, 9 parts, 10 parts,
10.5 parts, 11 parts or 12 parts etc..
The parts by weight of described short glass fiber are 15～25 parts, can be such as 15 parts, 17 parts, 19 parts,
22 parts, 23 parts or 25 parts etc..
The parts by weight of described thickening agent are 0.2～0.4 part, can be such as 0.2 part, 0.25 part, 0.3 part or
0.4 part etc..
Preferably, described unsaturated polyester resin is using organo montmorillonite and/or gas-phase silica as modification
Agent, is modified unsaturated polyester resin and obtains.
In the present invention, employing organo montmorillonite and/or gas-phase silica are as modifying agent, to unsaturated polyester resin
The method being modified, can use method of modifying of the prior art, such as: SMC/BMC insatiable hunger
With modification and research, fiberglass/composite, the 3rd phase in 2009 that polyester improves glass infiltration.
In the present invention, described " organo montmorillonite and/or gas-phase silica " refers to: can be organo montmorillonite,
Or gas-phase silica, it is also possible to it is the mixture of organo montmorillonite and gas-phase silica.
Organo montmorillonite in the present invention can be commercially available organo montmorillonite, it is also possible to be to use prior art
The organo montmorillonite for preparing of method, such as can use document " preparation of organo montmorillonite and intercalation
The selection of agent, Wang Huimin, Zou Xuhua, Li Linlin etc., Speciality Petrochemicals, phase January the 1st in 2004 "
Disclosed in method prepare.
Preferably, the viscosity of described modified unsaturated polyester resin is 1350mPa s.
In the present invention, by adding the unsaturated polyester of proper amount of modification in the raw material components of sheet molding compound
Ester resin, can play excellent leaching to continuously-directional glass fiber and short glass fiber in preparation process
Lubricant nature, and and then the mechanical strength of raising sheet molding compound.
Preferably, described modified calcium carbonate is using silane coupler as modifying agent, is modified calcium carbonate
And obtain.
The present invention uses silane coupler as modifying agent, the method that calcium carbonate is modified, can adopt
Use method of modifying of the prior art, such as: added in mixer by dry pearl filler, add simultaneously
Enter the mixed solution of silane coupler and ethanol, stir 60min, be then placed in constant temperature 3 in the baking oven of 40 DEG C
Hour.
In the present invention, change by adding the silane coupler of appropriate mass in the raw material components of sheet molding compound
Property calcium carbonate, improve the mechanical strength of the sheet molding compound obtained, and make material filling ability excellent,
And product surface light.
As the optimal technical scheme of sheet molding compound of the present invention, a kind of sheet molding compound, described lamellar
Moulding compound is counted containing following raw material components by weight:
Preferably, described low shrinkage additive is with polystyrene, styrene and polymerization inhibitor as raw material, reaction
Prepare.
Preferably, the preparation method of described low shrinkage additive is: by polystyrene, styrene and polymerization inhibitor
Under the conditions of less than 30 DEG C, react 8h, obtain low shrinkage additive.
Preferably, the particle diameter of described aluminium hydroxide is 7～9 μm, such as, can be 7 μm, 7.5 μm, 8 μm, 8.5 μm
Or 9 μm etc..
Preferably, described releasing agent is calcium stearate powder, and the particle diameter of described calcium stearate powder is preferably 200
Mesh.
Preferably, described thickening agent is magnesium oxide, preferably liquid oxidation magnesium, and liquid oxidation magnesium easily disperses,
Dust will not be produced, be conducive to improving the viscosity of resin paste, it is simple to process and beneficially improve the lamellar obtained
The mechanical strength of moulding compound.
Preferably, described firming agent is peroxidized t-butyl perbenzoate.
Preferably, the purity of described peroxidized t-butyl perbenzoate is more than 98%；.
Preferably, the half-life decomposition temperature of described peroxidized t-butyl perbenzoate is 104 DEG C (10 hours).
Preferably, described sheet molding compound is counted by weight and can also be included following raw material components: antioxidation
Any one or the mixture of at least two in agent, process auxiliaries or pigment.
Preferably, the parts by weight of described antioxidant are 0.1～0.3 part, can be such as 0.1 part, 0.2 part,
0.25 part or 0.3 part etc..
Preferably, the parts by weight of described process auxiliaries are 0.5～1 part, can be such as 0.5 part, 0.6 part,
0.7 part, 0.8 part, 0.85 part or 1 part etc..
Preferably, the parts by weight of described pigment are 2～4 parts, can be such as 2 parts, 2.2 parts, 2.5 parts,
2.8 parts, 3 parts, 3.5 parts or 4 parts etc..
Preferably, described antioxidant is 2,6-di-t-butyl Pyrogentisinic Acid, and it not only has good antioxidation
Effect, and with other raw material components in the sheet molding compound of the present invention, there is the extraordinary compatibility, and
And there is under the processing temperature of the present invention good stability.
Preferably, described process auxiliaries is BYK-W-996.BYK-W-996 is a kind of containing acidic-group
Copolymer solution, the mixture of surfactant and polymer specifically, the present invention adds
BYK-W-996 is possible not only to stable sheet molding compound, improves mobility, it is also possible to improve in preparation process
Release property.
Preferably, the raw material components of described pigment is toner and the monomer-free unsaturated polyester of 90wt% of 10wt%
Ester resin.The preparation method of described pigment is prior art, can by said ratio by toner and monomer-free not
Saturated polyester resin mixes, and then mills, makes pigment.
In the present invention, described continuously-directional glass fiber is alkali-free continuous fiber, without cutting.Described " alkali-free "
Refer to: alkali metal oxide R2The mass content of O is less than 0.8%.
In the present invention, described short glass fiber is alkali-free short glass fiber, and it can be commercially available alkali-free
Short glass fiber, it is also possible to being that alkali-free continuous glass fibre is cleaved obtains, preferably Cutting Length is
25mm。
In the present invention, by use continuously-directional glass fiber and the short glass fiber of conformability, and regulate
The two adding proportion relation with other each raw material components, significantly improves the mechanical strength of sheet molding compound.
Second aspect, the present invention provides the preparation method of sheet molding compound as described in relation to the first aspect, described side
Method comprises the following steps:
(1) modified unsaturated polyester resin and low shrinkage additive are positioned in agitator, stirring；
(2) in the mixed slurry that step (1) stirs, firming agent, stirring are added；
(3) in the slurry that step (2) stirs, modified calcium carbonate, aluminium hydroxide and releasing agent are added,
Stirring；
(4) in the slurry that step (3) stirs, add thickening agent, stirring, obtain resin paste；
(5) SMC production line in the resin paste that step (4) obtains is made to produce: by resin paste by tree
Fat stick with paste delivery platform be transported on bearing film, one roller traction continuously-directional glass fiber longitudinally through pressure roll,
Another roller continuous glass fibre, through sickle chopped, forms short glass fiber, with continuously-directional glass fibers
Dimension is compounding, in the old resin paste being laid on bearing film, covers with the upper thin film being coated with resin paste simultaneously,
Make SMC sheet, be then confined in the air within interlayer by crawler belt extrusion expeling, and realize dipping,
Sheet molding compound completes.
In the method for the invention, the preparation of material is at room temperature carried out, and the whipping temp of resin paste is less than
30℃。
Preferably, the rotating speed that step (1) stirs is 800～1000r/min, can be such as 800r/min,
820r/min, 830r/min, 850r/min, 885r/min, 900r/min, 950r/min, 970r/min or 1000
R/min etc..
Preferably, the time that step (1) stirs is 1～2min, such as, can be 1min, 1.5min or 2min
Deng.
Preferably, the rotating speed that step (2) stirs is 500～700r/min, can be such as 500r/min, 525r/min,
550r/min, 565r/min, 575r/min, 600r/min, 620r/min, 650r/min or 700r/min etc..
Preferably, the time that step (2) stirs is 2～3min, such as, can be 2min, 2.5min or 3min
Deng.
Preferably, the rotating speed that step (3) stirs is 1000～1200r/min, can be such as 1000r/min,
1050r/min, 1100r/min, 1150r/min or 1200r/min etc..
Preferably, the time that step (3) stirs is 5～10min, such as, can be 5min, 7min, 9min
Or 10min etc..
Preferably, the rotating speed that step (4) stirs is 500～700r/min, can be such as 500r/min, 550r/min,
560r/min, 580r/min, 600r/min, 650r/min or 700r/min etc..
Preferably, the time that step (4) stirs is 2～3min, such as, can be 2min, 2.5min, 2.8min
Or 3min etc..
Preferably, adding technology auxiliary agent and/or the step of pigment during described method is additionally included in step (1)；
Preferably, the step of antioxidant is added during described method is additionally included in step (2).
In the method for the invention, by using a roller to add continuously-directional glass fiber, another roller will continuously
Glass fibre cuts into short glass fiber, and both fibers compound the old resin being laid on bearing film
The mode pasted over, significantly improves the mechanical strength of the wellability to glass fibre and sheet molding compound.
In the method for the invention, by each raw material components is added the most step by step, stirs,
And control the addition of each component and the parameter of whipping process, control the dispersing and dissolving shape of each component in material
Condition, improves shaping characteristic and presentation quality, handling ease, and the surface-brightening of material.
Compared with the prior art, there is advantages that
(1) present invention by use organo montmorillonite and/or gas-phase silica as modifying agent, modified and obtain
To modified unsaturated polyester resin, use silane coupler modified and obtain modified calcium carbonate, and by appropriate amount
Modified unsaturated polyester resin, modified calcium carbonate, continuously-directional glass fiber and short glass fiber add
In the raw material components of sheet molding compound, regulate the matching relationship of these several components and other raw material components, make
The wellability obtaining continuously-directional glass fiber and short glass fiber is good, and the compatibility of each storeroom is good, Yi Jia
Work, significantly improves mechanical strength and electric leakage high pressure resistant, resistance to and the flame resistance etc. of the sheet molding compound obtained,
Its hot strength is at more than 170MPa, and bending strength is in more than 250MPa, impact strength (non-notch)
At 170KJ/m2Above, severe environmental conditions and the test loaded immediately it are able to take.
(2) the method for the invention is simple, easily operates, by pressing certain by each raw material components of the present invention
Order is added step by step, is stirred, and controls the addition of each component and the parameter of whipping process, controls material
The dispersing and dissolving situation of each component in material, improves shaping characteristic and presentation quality, handling ease, the table of material
Face light, and mechanical strength is the best, has the highest hot strength, bending strength and impact strength, can answer
Use the large-scale blade of wind-power electricity generation, have a extensive future.
Detailed description of the invention
Technical scheme is further illustrated below by detailed description of the invention.
It should be understood that kg can replace by other mass unit, such as g and jin etc. in the present invention.
The performance of the product that each embodiment obtains is detected, test event, testing standard and test knot
Fruit is shown in Table 1.
Embodiment 1
A kind of sheet molding compound, described sheet molding compound contains following raw material components:
The preparation method of sheet molding compound: modified unsaturated polyester resin and low shrinkage additive are placed by (1)
In agitator, stir 2min with the rotating speed of 800r/min；
(2) in the mixed slurry that step (1) stirs, peroxidized t-butyl perbenzoate is added, with
The rotating speed stirring 3min of 500r/min；
(3) in the slurry that step (2) stirs, modified calcium carbonate, aluminium hydroxide and stearic acid are added
Calcium powder, stirs 10min with the rotating speed of 1000r/min；
(4) in the slurry that step (3) stirs, liquid oxidation magnesium is added, with the rotating speed of 500r/min
Stirring 3min, obtains resin paste；
(5) SMC production line in the resin paste that step (4) obtains is made to produce: by resin paste by tree
Fat stick with paste delivery platform be transported on bearing film, one roller traction continuously-directional glass fiber longitudinally through pressure roll,
Another roller continuous glass fibre, through sickle chopped, forms short glass fiber, with continuously-directional glass fibers
Dimension is compounding, and in the old resin paste being laid on bearing film, the upper thin film being simultaneously coated with resin paste covers, system
Become SMC sheet, be then confined in the air within interlayer by crawler belt extrusion expeling, and realize dipping, sheet
Shape moulding compound completes.
The sheet molding compound obtaining the present embodiment detects, and test result is shown in Table 1.
Embodiment 2
A kind of sheet molding compound, described sheet molding compound contains following raw material components:
The preparation method of sheet molding compound is same as in Example 1, and difference is: mixing speed in step (1)
For 800r/min, mixing time is 2min；In step (2), mixing speed is 600r/min, and mixing time is
3min；In step (3), mixing speed is 1100r/min, and mixing time is 8min；Step is stirred in (4)
Mixing speed is 600r/min, and mixing time is 3min.
The sheet molding compound obtaining the present embodiment detects, and test result is shown in Table 1.
Embodiment 3
A kind of sheet molding compound, described sheet molding compound contains following raw material components:
The sheet molding compound obtaining the present embodiment detects, and test result is shown in Table 1.
The preparation method of sheet molding compound is same as in Example 1, and difference is: mixing speed in step (1)
For 900r/min, mixing time is 2min；In step (2), mixing speed is 600r/min, and mixing time is
3min；In step (3), mixing speed is 1200r/min, and mixing time is 6min；Step is stirred in (4)
Mixing speed is 600r/min, and mixing time is 3min.
Embodiment 4
A kind of sheet molding compound, described sheet molding compound contains following raw material components:
The preparation method of sheet molding compound is same as in Example 1, and difference is: mixing speed in step (1)
For 1000r/min, mixing time is 2min；In step (2), mixing speed is 700r/min, mixing time
For 2min；In step (3), mixing speed is 1200r/min, and mixing time is 6min；In step (4)
Mixing speed is 600r/min, and mixing time is 2min.
The sheet molding compound obtaining the present embodiment detects, and test result is shown in Table 1.
Embodiment 5
A kind of sheet molding compound, described sheet molding compound contains following raw material components:
The preparation method of sheet molding compound is same as in Example 1, and difference is: mixing speed in step (1)
For 1000r/min, mixing time is 1min；In step (2), mixing speed is 700r/min, mixing time
For 2min；In step (3), mixing speed is 1200r/min, and mixing time is 5min；In step (4)
Mixing speed is 700r/min, and mixing time is 2min.
The sheet molding compound obtaining the present embodiment detects, and test result is shown in Table 1.
Table 1
Comparative example 1
In addition to modified unsaturated polyester resin is replaced with unsaturated polyester resin, other preparation methoies, preparation
Condition and testing standard are the same as in Example 4.
Test result shows, its hot strength is 96MPa, and bending strength is 205MPa, impact strength (nothing
Breach) at 98KJ/m2。
Comparative example 2
In addition to modified calcium carbonate is replaced with calcium carbonate, other preparation methoies, preparation condition and testing standard
The same as in Example 4.
Test result shows, its hot strength is 100MPa, and bending strength is 207MPa, impact strength (nothing
Breach) at 102KJ/m2。
Comparative example 3
Except modified unsaturated polyester resin and modified calcium carbonate are replaced with unsaturated polyester resin and carbonic acid respectively
Outside calcium, other preparation methoies, preparation condition and testing standard are the same as in Example 4.
Test result shows, its hot strength is 90MPa, and bending strength is 200MPa, impact strength (nothing
Breach) at 90KJ/m2。
By embodiment 1-5 and comparative example 1-3, the mechanical strength of sheet molding compound of the present invention due to
Comparative example 1,2 and 3, the formed products proportion of the sheet molding compound of the present invention, between 1.7-1.95, shapes and receives
Shrinkage is less than 0.15, and water absorption rate is less than 0.2, and heat distortion temperature is more than 240 DEG C, and hot strength is at 170MPa
Above, bending strength is at more than 250MPa, and impact strength (non-notch) is at 170KJ/m2Above, insulation
Opposing (normality) is more than 1013Ω, insulation opposing (boiling) is more than 1012Ω, proof voltage is at 20KV/mm
Above, arc resistance is at more than 180Sec, and resistance to leakage property is more than 600CTI, and fire-retardant rank is up to V-0.
Applicant states, the present invention illustrates the method detailed of the present invention by above-described embodiment, but the present invention
It is not limited to above-mentioned method detailed, does not i.e. mean that the present invention has to rely on above-mentioned method detailed and could implement.
Person of ordinary skill in the field is it will be clearly understood that any improvement in the present invention, each former to product of the present invention
The equivalence of material is replaced and the interpolation of auxiliary element, concrete way choice etc., all falls within the protection model of the present invention
Within the scope of enclosing and disclosing.
Claims (10)
1. a sheet molding compound, it is characterised in that described sheet molding compound is counted by weight containing following
Raw material components:
Sheet molding compound the most according to claim 1, it is characterised in that described modified unsaturated polyester
Resin is using organo montmorillonite and/or gas-phase silica as modifying agent, is modified unsaturated polyester resin
And obtain.
Sheet molding compound the most according to claim 1 and 2, it is characterised in that described modified calcium carbonate
It is using silane coupler as modifying agent, calcium carbonate is modified and obtains.
4. according to the sheet molding compound described in any one of claim 1-3, it is characterised in that described lamellar mould
Plastics are counted containing following raw material components by weight:
5. according to the sheet molding compound described in any one of claim 1-4, it is characterised in that described lower shrinkage
Additive is with polystyrene, styrene and polymerization inhibitor as raw material, and reaction prepares；
Preferably, the particle diameter of described aluminium hydroxide is 7～9 μm；
Preferably, described releasing agent is calcium stearate powder, and the particle diameter of described calcium stearate powder is preferably 200
Mesh；
Preferably, described thickening agent is magnesium oxide；
Preferably, described firming agent is peroxidized t-butyl perbenzoate；
Preferably, the purity of described peroxidized t-butyl perbenzoate is more than 98%.
6. according to the sheet molding compound described in any one of claim 1-5, it is characterised in that described lamellar mould
Plastics are counted by weight and are also included following raw material components: any in antioxidant, process auxiliaries or pigment
A kind of or the mixture of at least two；
Preferably, the parts by weight of described antioxidant are 0.1～0.3 part；
Preferably, the parts by weight of described process auxiliaries are 0.5～1 part；
Preferably, the parts by weight of described pigment are 2～4 parts.
Sheet molding compound the most according to claim 6, it is characterised in that described antioxidant is 2,6-
Di-t-butyl Pyrogentisinic Acid.
8. the preparation method of the sheet molding compound as described in any one of claim 1-7, it is characterised in that institute
The method of stating comprises the following steps:
(1) modified unsaturated polyester resin and low shrinkage additive are positioned in agitator, stirring；
(2) in the mixed slurry that step (1) stirs, firming agent, stirring are added；
(3) in the slurry that step (2) stirs, modified calcium carbonate, aluminium hydroxide and releasing agent are added,
Stirring；
(4) in the slurry that step (3) stirs, add thickening agent, stirring, obtain resin paste；
(5) SMC production line in the resin paste that step (4) obtains is made to produce: by resin paste by tree
Fat stick with paste delivery platform be transported on bearing film, one roller traction continuously-directional glass fiber longitudinally through pressure roll,
Another roller continuous glass fibre, through sickle chopped, forms short glass fiber, with continuously-directional glass fibers
Dimension is compounding, in the old resin paste being laid on bearing film, covers with the upper thin film being coated with resin paste simultaneously,
Make SMC sheet, be then confined in the air within interlayer by crawler belt extrusion expeling, and realize dipping,
Sheet molding compound completes.
Method the most according to claim 8, it is characterised in that the rotating speed of step (1) described stirring
Being 800～1000r/min, the time of step (1) described stirring is preferably 1～2min；
Preferably, the rotating speed of step (2) described stirring is 500～700r/min, step (2) described stirring
Time be preferably 2～3min；
Preferably, the rotating speed of step (3) described stirring is 1000～1200r/min, and step is stirred described in (3)
The time mixed is preferably 5～10min；
Preferably, the rotating speed of step (4) described stirring is 500～700r/min, step (4) described stirring
Time be preferably 2～3min.
Method the most according to claim 8 or claim 9, it is characterised in that described method is additionally included in step
Suddenly adding technology auxiliary agent and/or the step of pigment in (1)；
Preferably, the step of antioxidant is added during described method is additionally included in step (2).
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| CN107118488A (en) * | 2017-04-10 | 2017-09-01 | 振石集团华美新材料有限公司 | Continuously-directional glass fiber strengthens high electrical property sheet molding compound and preparation method |
| CN107151433A (en) * | 2017-07-12 | 2017-09-12 | 河北立格新材料科技股份有限公司 | A kind of new SMC material and preparation method thereof |
| CN108034212A (en) * | 2017-12-18 | 2018-05-15 | 常州市鼎日环保科技有限公司 | A kind of preparation method of low-shrinkage flame retardant type sheet molding compound |
| CN108237749A (en) * | 2016-12-23 | 2018-07-03 | 比亚迪股份有限公司 | A kind of composite material and preparation method thereof |
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| CN110534896A (en) * | 2018-05-26 | 2019-12-03 | 广东延春高新材料科技股份有限公司 | Low density glass steel antenna house and its production technology |
| CN110527265A (en) * | 2018-05-26 | 2019-12-03 | 广东延春高新材料科技股份有限公司 | 5G fiberglass radome and its production technology |
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| CN108237749A (en) * | 2016-12-23 | 2018-07-03 | 比亚迪股份有限公司 | A kind of composite material and preparation method thereof |
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| CN110534896A (en) * | 2018-05-26 | 2019-12-03 | 广东延春高新材料科技股份有限公司 | Low density glass steel antenna house and its production technology |
| CN110527265A (en) * | 2018-05-26 | 2019-12-03 | 广东延春高新材料科技股份有限公司 | 5G fiberglass radome and its production technology |
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| CN109334190A (en) * | 2018-09-14 | 2019-02-15 | 无锡新宏泰电器科技股份有限公司 | A kind of electromagnetic masking sheet molding compound and preparation method thereof |
| CN109517354A (en) * | 2018-11-22 | 2019-03-26 | 安徽汇创新材料有限公司 | A kind of fire-retardant resistance to compression composite material and preparation method for glass toughening manure pit |
| CN111500038A (en) * | 2020-03-18 | 2020-08-07 | 浙江龙鑫化工有限公司 | Low-density SMC sheet and preparation method thereof |
| CN111500038B (en) * | 2020-03-18 | 2023-10-03 | 浙江龙鑫化工有限公司 | Low-density SMC sheet and preparation method thereof |
| CN111777846A (en) * | 2020-07-03 | 2020-10-16 | 无锡朴业橡塑有限公司 | SMC (sheet molding compound) molding compound for low-temperature low-pressure weather-resistant agricultural machinery and preparation method thereof |
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