CN105885376B - A kind of sheet molding compound and preparation method thereof - Google Patents
A kind of sheet molding compound and preparation method thereof Download PDFInfo
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- CN105885376B CN105885376B CN201610429310.4A CN201610429310A CN105885376B CN 105885376 B CN105885376 B CN 105885376B CN 201610429310 A CN201610429310 A CN 201610429310A CN 105885376 B CN105885376 B CN 105885376B
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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 present invention provides a kind of sheet molding compound, the sheet molding compound is counted in parts by weight containing following raw material components：15~25 parts of 15~40 parts of modified unsaturated polyester resin, 4~10 parts of low shrinkage additive, 20~50 parts of modified calcium carbonate, 20~50 parts of aluminium hydroxide, 0.8~1.2 part of releasing agent, 0.2~0.4 part of thickener, 0.1~0.4 part of curing agent, 8~12 parts of continuously-directional glass fiber and short glass fiber.The sheet molding compound of the present invention is with very high mechanical strength and with excellent properties such as good high pressure resistant, resistance to leakage property, flame resistance and heat distortion temperature height, its tensile strength is in more than 170MPa, bending strength is in more than 250MPa, and impact strength (non-notch) is in 170KJ/m2More than, the large-scale blade of wind-power electricity generation is can be applied to, the test for being able to take severe environmental conditions and loading immediately ensures that unit is run steadily in the long term.
Description
Technical field
The invention belongs to composite insulating material preparation fields, are related to a kind of sheet molding compound (Sheet Molding
Compound, SMC) and preparation method thereof more particularly to a kind of high intensity continuously-directional glass fiber enhancing high-strength sheet
Moulding compound and preparation method thereof.
Background technology
In recent years, energy conservation and environmental protection and clean energy resource are increasingly paid attention in the whole world, and wherein wind-powered electricity generation is excellent as application on the largest scale
One of regenerative resource of gesture obtains rapid growth in the whole world, and China becomes the most fast country of growth rate, at present, wind-force hair
Electricity has built large-scale modern wind power base and mating output in areas such as Xinjiang of China, the Inner Mongol, the Three Eastern Provinces, Ji Bei and Shandong
Engineering, future will be attached most importance to south and Middle Eastern, greatly develop distributing wind-powered electricity generation, stable development offshore wind farm, so as to
The development of the composite products such as wind electricity blade, wheel hub, engine room cover, kuppe will be driven.By market competition early period and shuffle,
Wind-power electricity generation gradually develops to high-power unit, thus it requires blade is increasingly longer, wind sweeping area bigger, and and pass through structure optimization
Design realizes that blade low load and high efficiency are combined.Wind electricity blade is bigger, and the requirement to intensity is higher, molding compound material
It is the main material of currently manufactured wind electricity blade, it is necessary to the intensity of molding compound material is improved, to adapt to the development of wind-powered electricity generation industry
It is required that.
Moulding compound mainly comprising sheet molding compound SMC, is grown up the last century 60's with glass fiber reinforcement
Polymer matrix composites.It is using different size unsaturated polyester resin as adhesive, using alkali-free glass fibre as strengthening material
Material, and filler and various additives are added in, it is processed through professional equipment, belongs to duroplastic moulding materials.It has intensity it is high,
It is light-weight, corrosion-resistant and electrical isolation the features such as, and with performance design degree of freedom it is big, it is easy to process the advantages of, be the whole world most
One of extensive composite material, it is each to be widely used in rail traffic, household building, electrical engineering and electric apparatus, communal facility automobile making etc.
Kind field.In order to obtain high performance SMC composite materials, domestic and international many enterprises and research department were to resin and fibre in recent years
The characteristic of dimension is studied, to obtain the material of excellent properties.But it does not still develop and disclosure satisfy that big wind electricity blade
The SMC material of the high mechanical properties used.
Invention content
For the above-mentioned problems in the prior art, the purpose of the present invention is to provide a kind of sheet molding compound and its systems
Preparation Method, sheet molding compound of the invention is with high intensity and with good high pressure resistant, resistance to leakage property, flame resistance and thermal change
The excellent properties such as shape temperature height, tensile strength is in more than 170MPa, and for bending strength in more than 250MPa, impact strength is (intact
Mouthful) in 170KJ/m2More than, it can be applied to the large-scale blade of wind-power electricity generation, be able to take severe environmental conditions and load immediately
Test ensures that unit is run steadily in the long term.
In order to achieve the above object, the present invention uses following technical scheme：
" continuously-directional glass fiber " of the present invention, is one kind in continuous glass fibre, and glass fibre therein divides
Son aligns.
In a first aspect, the present invention provides a kind of sheet molding compound, the sheet molding compound is counted in parts by weight containing following
Raw material components：
The parts by weight of the modified unsaturated polyester resin be 15~40 parts, may be, for example, 15 parts, 18 parts, 20 parts, 23
Part, 26 parts, 30 parts, 33 parts, 35 parts or 40 parts etc..
The parts by weight of the low shrinkage additive are 4~10 parts, may be, for example, 4 parts, 6 parts, 7 parts, 8 parts, 8.5 parts or 10
Part etc..
Low shrinkage additive (Low Shrinkage Addictive, LSA) is to refer to reduce the process in machine-shaping
A kind of additive of middle resin shrinkage rate.
The parts by weight of the modified calcium carbonate be 20~50 parts, may be, for example, 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 the aluminium hydroxide be 20~50 parts, may be, for example, 20 parts, 25 parts, 28 parts, 30 parts, 32.5 parts,
35 parts, 40 parts, 43 parts or 50 parts etc..
The parts by weight of the releasing agent are 0.8~1.2 part, may be, for example, 0.8 part, 0.9 part, 1 part, 1.1 parts or 1.2 parts
Deng.
The parts by weight of the curing agent are 0.1~0.4 part, may be, for example, 0.1 part, 0.2 part, 0.3 part or 0.4 part etc..
The parts by weight of the continuously-directional glass fiber be 8~12 parts, may be, for example, 8 parts, 9 parts, 10 parts, 10.5 parts,
11 parts or 12 parts etc..
The parts by weight of the short glass fiber are 15~25 parts, may be, for example, 15 parts, 17 parts, 19 parts, 22 parts, 23 parts
Or 25 parts etc..
The parts by weight of the thickener are 0.2~0.4 part, may be, for example, 0.2 part, 0.25 part, 0.3 part or 0.4 part etc..
Preferably, the unsaturated polyester resin is using organo montmorillonite and/or gas-phase silica as modifying agent, to not
Obtained from saturated polyester resin is modified.
Unsaturated polyester resin is carried out as modifying agent using organo montmorillonite and/or gas-phase silica in the present invention
Method of modifying of the prior art may be used in modified method, such as：SMC/BMC improves glass with unsaturated polyester (UP) and infiltrates
Modification and research, fiberglass/composite material, the 3rd phase in 2009.
In the present invention, " organo montmorillonite and/or the gas-phase silica " refers to：Can be organo montmorillonite or gas
Phase white carbon can also be the mixture of organo montmorillonite and gas-phase silica.
Organo montmorillonite in the present invention can be commercially available organo montmorillonite or using the method for the prior art
The organo montmorillonite being prepared, for example, may be used document " preparation of organo montmorillonite and the selection of intercalator, Wang Huimin,
It is prepared by the method disclosed in Zou Xuhua, Li Linlin etc., Speciality Petrochemicals, the 1st phase of January in 2004 ".
Preferably, the viscosity of the modified unsaturated polyester resin is 1350mPas.
In the present invention, by the unsaturated polyester (UP) tree that proper amount of modification is added in the raw material components of sheet molding compound
Fat can play continuously-directional glass fiber and short glass fiber in preparation process excellent wellability, and and then carry
The mechanical strength of high sheet molding compound.
Preferably, the modified calcium carbonate is using silane coupling agent as modifying agent, and calcium carbonate is modified and is obtained
's.
It, to the method that calcium carbonate is modified, may be used existing as modifying agent using silane coupling agent in the present invention
Method of modifying in technology, such as：Dry pearl filler is added in mixing machine, while adds in silane coupling agent and ethyl alcohol
Mixed solution, stir 60min, be then placed in constant temperature 3 hours in 40 DEG C of baking oven.
In the present invention, by the silane coupler modified carbon that appropriate mass is added in the raw material components of sheet molding compound
Sour calcium, the mechanical strength of the sheet molding compound improved, and make material filling ability excellent, and product surface is bright.
As the optimal technical scheme of sheet molding compound of the present invention, a kind of sheet molding compound, the sheet molding compound
Meter contains following raw material components in parts by weight：
Preferably, the low shrinkage additive is using polystyrene, styrene and polymerization inhibitor as raw material, and reaction is prepared
's.
Preferably, the preparation method of the low shrinkage additive is：By polystyrene, styrene and polymerization inhibitor no more than
8h is reacted under the conditions of 30 DEG C, obtains low shrinkage additive.
Preferably, the grain size of the aluminium hydroxide is 7~9 μm, may be, for example, 7 μm, 7.5 μm, 8 μm, 8.5 μm or 9 μm etc..
Preferably, the releasing agent is calcium stearate powder, and the grain size of the calcium stearate powder is preferably 200 mesh.
Preferably, the thickener is magnesia, and preferably liquid oxidation magnesium, liquid oxidation magnesium easily disperses, will not generate
Dust, is conducive to improve the viscosity of resin paste, easy to process and be conducive to improve the obtained mechanical strength of sheet molding compound.
Preferably, the curing agent is peroxidized t-butyl perbenzoate.
Preferably, the purity of the peroxidized t-butyl perbenzoate is more than 98%；.
Preferably, the half-life decomposition temperature of the peroxidized t-butyl perbenzoate is 104 DEG C (10 hours).
Preferably, the sheet molding compound is counted in parts by weight can also include following raw material components：Antioxidant, technique
In auxiliary agent or pigment any one or at least two mixture.
Preferably, the parts by weight of the antioxidant are 0.1~0.3 part, may be, for example, 0.1 part, 0.2 part, 0.25 part
Or 0.3 part etc..
Preferably, the parts by weight of the process auxiliaries be 0.5~1 part, may be, for example, 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 the pigment be 2~4 parts, may be, for example, 2 parts, 2.2 parts, 2.5 parts, 2.8 parts, 3 parts,
3.5 parts or 4 parts etc..
Preferably, the antioxidant is 2,6- di-t-butyl Pyrogentisinic Acids, not only has good antioxidation, and
And there is extraordinary compatibility, and in the processing temperature of the present invention with other raw material components in the sheet molding compound of the present invention
Degree is lower to have good stability.
Preferably, the process auxiliaries are BYK-W-996.BYK-W-996 is that a kind of copolymer containing acidic-group is molten
Liquid, the specifically mixture of surface reactive material and polymer, addition BYK-W-996 can not only stablize sheet in the present invention
Moulding compound improves mobility, can also improve the release property in preparation process.
Preferably, the raw material components of the pigment are the toner of 10wt% and the monomer-free unsaturated polyester (UP) tree of 90wt%
Fat.The preparation method of the pigment is the prior art, can be mixed toner and monomer-free unsaturated polyester resin by said ratio
It closes, then mills, pigment is made.
In the present invention, the continuously-directional glass fiber be alkali-free continuous fiber, no cutting." alkali-free " refers to：Alkali gold
Belong to oxide R2The mass content of O is less than 0.8%.
In the present invention, the short glass fiber is alkali-free short glass fiber, can be commercially available alkali-free and be chopped glass
What glass fiber or alkali-free continuous glass fibre obtained after cutting, preferably Cutting Length is 25mm.
In the present invention, continuously-directional glass fiber and short glass fiber are used by conformability, and both adjust with
The adding proportion relationship of other each raw material components significantly improves the mechanical strength of sheet molding compound.
Second aspect, the present invention provide the preparation method of sheet molding compound as described in relation to the first aspect, the method includes
Following steps：
(1) modified unsaturated polyester resin and low shrinkage additive are positioned in agitator, stirred；
(2) curing agent is added in into the mixed slurry that step (1) stirs evenly, stirred；
(3) modified calcium carbonate, aluminium hydroxide and releasing agent, stirring are added in into the slurry that step (2) stirs evenly；
(4) thickener is added in into the slurry that step (3) stirs evenly, stirs, obtain resin paste；
(5) produced SMC production lines in the resin paste that step (4) obtains：Resin paste by resin paste is conveyed and is put down
Platform is transported on bearing film, and a roller draws continuously-directional glass fiber longitudinally through pressure roll, another roller continuous glass fibre
It is chopped by cutter, forms short glass fiber, compounded with continuously-directional glass fiber, the old resin being laid on bearing film
It pastes over, while is covered with the upper film coated with resin paste, SMC sheet is made, then driven away by crawler belt extrusion and be confined in folder
Air within layer, and realize dipping, sheet molding compound completes.
In the method for the invention, the preparation of material carries out at room temperature, and the whipping temp of resin paste is less than 30 DEG C.
Preferably, the rotating speed of step (1) stirring is 800~1000r/min, may be, for example, 800r/min, 820r/min,
830r/min, 850r/min, 885r/min, 900r/min, 950r/min, 970r/min or 1000r/min etc..
Preferably, the time of step (1) stirring is 1~2min, may be, for example, 1min, 1.5min or 2min etc..
Preferably, the rotating speed of step (2) stirring is 500~700r/min, may be, for example, 500r/min, 525r/min,
550r/min, 565r/min, 575r/min, 600r/min, 620r/min, 650r/min or 700r/min etc..
Preferably, the time of step (2) stirring is 2~3min, may be, for example, 2min, 2.5min or 3min etc..
Preferably, the rotating speed of step (3) stirring is 1000~1200r/min, may be, for example, 1000r/min, 1050r/
Min, 1100r/min, 1150r/min or 1200r/min etc..
Preferably, the time of step (3) stirring is 5~10min, may be, for example, 5min, 7min, 9min or 10min etc..
Preferably, the rotating speed of step (4) stirring is 500~700r/min, may be, for example, 500r/min, 550r/min,
560r/min, 580r/min, 600r/min, 650r/min or 700r/min etc..
Preferably, the time of step (4) stirring is 2~3min, may be, for example, 2min, 2.5min, 2.8min or 3min etc..
Preferably, the method further includes the step of middle adding technology auxiliary agent in step (1) and/or pigment；
Preferably, the method is additionally included in the step of addition antioxidant in step (2).
In the method for the invention, continuously-directional glass fiber is added by using a roller, another roller is by continuous glass fibers
Dimension cuts into short glass fiber, and both fibers are compounded the mode in the old resin paste being laid on bearing film, significantly
Improve the mechanical strength of the wellability and sheet molding compound to glass fibre.
In the method for the invention, by the way that each raw material components are added step by step in sequence, are stirred, and control each
The additive amount of component and the parameter of whipping process control the dispersing and dissolving situation of each component in material, improve the molding of material
Characteristic and presentation quality, handling ease, and surface-brightening.
Compared with the prior art, the present invention has the advantages that：
(1) present invention is modified by using organo montmorillonite and/or gas-phase silica as modifying agent and obtains being modified not
Saturated polyester resin, obtains modified calcium carbonate using silane coupler modified, and by proper amount of modified unsaturated polyester tree
Fat, modified calcium carbonate, continuously-directional glass fiber and short glass fiber are added in the raw material components of sheet molding compound, adjust
These types of component and the matching relationship of other raw material components so that the wellability of continuously-directional glass fiber and short glass fiber
Good, the compatibility of each storeroom is good, easy processing, the mechanical strength of the sheet molding compound significantly improved and high pressure resistant, resistance to
Electric leakage and flame resistance etc., tensile strength exists in more than 170MPa, bending strength in more than 250MPa, impact strength (non-notch)
170KJ/m2More than, the test that is able to take severe environmental conditions and loads immediately.
(2) the method for the invention is simple, easy to operate, by by the present invention each raw material components in sequence substep
Rapid addition, stirring, and the additive amount of each component and the parameter of whipping process are controlled, control the dispersing and dissolving of each component in material
Situation improves the shaping characteristic and presentation quality of material, handling ease, surface-brightening, and mechanical strength is very good, has very high
Tensile strength, bending strength and impact strength may be used on the large-scale blade of wind-power electricity generation, have a extensive future.
Specific embodiment
The technical solution further illustrated the present invention below by specific embodiment.
It should be noted that：Kg can use other mass units to replace, such as g and jin in the present invention.
The performance of product that each embodiment obtains is detected, test event, testing standard and test result are shown in Table
1。
Embodiment 1
A kind of sheet molding compound, the sheet molding compound contain following raw material components：
The preparation method of sheet molding compound：(1) modified unsaturated polyester resin and low shrinkage additive are positioned over stirring
In bucket, 2min is stirred with the rotating speed of 800r/min；
(2) peroxidized t-butyl perbenzoate is added in into the mixed slurry that step (1) stirs evenly, with turning for 500r/min
Speed stirring 3min；
(3) modified calcium carbonate, aluminium hydroxide and calcium stearate powder are added in into the slurry that step (2) stirs evenly, with
The rotating speed stirring 10min of 1000r/min；
(4) liquid oxidation magnesium is added in into the slurry that step (3) stirs evenly, 3min is stirred with the rotating speed of 500r/min,
Obtain resin paste；
(5) produced SMC production lines in the resin paste that step (4) obtains：Resin paste by resin paste is conveyed and is put down
Platform is transported on bearing film, and a roller draws continuously-directional glass fiber longitudinally through pressure roll, another roller continuous glass fibre
It is chopped by cutter, forms short glass fiber, compounded with continuously-directional glass fiber, the old resin being laid on bearing film
It pastes over, while the upper film coated with resin paste covers, and SMC sheet is made, is then driven away by crawler belt extrusion and be confined in interlayer
Within air, and realize dipping, sheet molding compound completes.
The sheet molding compound that the present embodiment obtains is detected, test result is shown in Table 1.
Embodiment 2
A kind of sheet molding compound, the sheet molding compound contain following raw material components：
The preparation method of sheet molding compound is same as Example 1, difference lies in：Mixing speed is 800r/ in step (1)
Min, mixing time 2min；Mixing speed is 600r/min, mixing time 3min in step (2)；Stirring speed in step (3)
It spends for 1100r/min, mixing time 8min；Mixing speed is 600r/min, mixing time 3min in step (4).
The sheet molding compound that the present embodiment obtains is detected, test result is shown in Table 1.
Embodiment 3
A kind of sheet molding compound, the sheet molding compound contain following raw material components：
The sheet molding compound that the present embodiment obtains is detected, test result is shown in Table 1.
The preparation method of sheet molding compound is same as Example 1, difference lies in：Mixing speed is 900r/ in step (1)
Min, mixing time 2min；Mixing speed is 600r/min, mixing time 3min in step (2)；Stirring speed in step (3)
It spends for 1200r/min, mixing time 6min；Mixing speed is 600r/min, mixing time 3min in step (4).
Embodiment 4
A kind of sheet molding compound, the sheet molding compound contain following raw material components：
The preparation method of sheet molding compound is same as Example 1, difference lies in：Mixing speed is 1000r/ in step (1)
Min, mixing time 2min；Mixing speed is 700r/min, mixing time 2min in step (2)；Stirring speed in step (3)
It spends for 1200r/min, mixing time 6min；Mixing speed is 600r/min, mixing time 2min in step (4).
The sheet molding compound that the present embodiment obtains is detected, test result is shown in Table 1.
Embodiment 5
A kind of sheet molding compound, the sheet molding compound contain following raw material components：
The preparation method of sheet molding compound is same as Example 1, difference lies in：Mixing speed is 1000r/ in step (1)
Min, mixing time 1min；Mixing speed is 700r/min, mixing time 2min in step (2)；Stirring speed in step (3)
It spends for 1200r/min, mixing time 5min；Mixing speed is 700r/min, mixing time 2min in step (4).
The sheet molding compound that the present embodiment obtains is detected, 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 methods, preparation condition with
And testing standard is same as Example 4.
Test result shows that tensile strength 96MPa, bending strength 205MPa, impact strength (non-notch) exist
98KJ/m2。
Comparative example 2
In addition to modified calcium carbonate is replaced with calcium carbonate, other preparation methods, preparation condition and testing standard and implementation
Example 4 is identical.
Test result shows that tensile strength 100MPa, bending strength 207MPa, impact strength (non-notch) exist
102KJ/m2。
Comparative example 3
In addition to modified unsaturated polyester resin and modified calcium carbonate are replaced with unsaturated polyester resin and calcium carbonate respectively,
Other preparation methods, preparation condition and testing standard are same as Example 4.
Test result shows that tensile strength 90MPa, bending strength 200MPa, impact strength (non-notch) exist
90KJ/m2。
By embodiment 1-5 and comparative example 1-3 it is found that the mechanical strength of sheet molding compound of the present invention is due to comparative example
1st, 2 and 3, the formed products proportion of sheet molding compound of the invention is between 1.7-1.95, and shaping shrinkage rate is less than 0.15, water absorption rate
Less than 0.2, heat distortion temperature is more than 240 DEG C, and tensile strength is in more than 170MPa, and for bending strength in more than 250MPa, impact is strong
(non-notch) is spent in 170KJ/m2More than, insulation resists (normality) more than 1013Ω, insulation are resisted and (boiled) more than 1012Ω, resistance to electricity
More than 20KV/mm is pressed in, arc resistance is more than 600CTI in more than 180Sec, resistance to leakage property, and fire-retardant rank is up to V-0.
Applicant states that the present invention illustrates the method detailed of the present invention, but not office of the invention by above-described embodiment
It is limited to above-mentioned method detailed, that is, does not mean that the present invention has to rely on above-mentioned method detailed and could implement.Technical field
Technical staff it will be clearly understood that any improvement in the present invention, equivalence replacement and auxiliary element to each raw material of product of the present invention
Addition, selection of concrete mode etc., all fall within protection scope of the present invention and the open scope.
Claims (25)
1. a kind of sheet molding compound, which is characterized in that the sheet molding compound is counted in parts by weight containing following raw material components：
The modified unsaturated polyester resin is using organo montmorillonite and/or gas-phase silica as modifying agent, and unsaturation is gathered
Obtained from ester resin is modified；
The modified calcium carbonate is using silane coupling agent as modifying agent, obtained from being modified to calcium carbonate.
2. sheet molding compound according to claim 1, which is characterized in that the sheet molding compound count in parts by weight containing
Following raw material components：
3. sheet molding compound according to claim 1, which is characterized in that the low shrinkage additive be with polystyrene,
Styrene and polymerization inhibitor are raw material, react what is be prepared.
4. sheet molding compound according to claim 1, which is characterized in that the grain size of the aluminium hydroxide is 7~9 μm.
5. sheet molding compound according to claim 1, which is characterized in that the releasing agent is calcium stearate powder.
6. sheet molding compound according to claim 5, which is characterized in that the grain size of the calcium stearate powder is 200 mesh.
7. sheet molding compound according to claim 1, which is characterized in that the thickener is magnesia.
8. sheet molding compound according to claim 1, which is characterized in that the curing agent is the tertiary fourth of perbenzoic acid
Ester.
9. sheet molding compound according to claim 8, which is characterized in that the purity of the peroxidized t-butyl perbenzoate exists
More than 98%.
10. sheet molding compound according to claim 1, which is characterized in that the sheet molding compound is counted also in parts by weight
Including following raw material components：In antioxidant, process auxiliaries or pigment any one or at least two mixture.
11. sheet molding compound according to claim 10, which is characterized in that the parts by weight of the antioxidant are 0.1
~0.3 part.
12. sheet molding compound according to claim 10, which is characterized in that the parts by weight of the process auxiliaries are 0.5
~1 part.
13. sheet molding compound according to claim 10, which is characterized in that the parts by weight of the pigment are 2~4 parts.
14. sheet molding compound according to claim 10, which is characterized in that the antioxidant is 2,6- di-t-butyls pair
Phenol.
15. such as the preparation method of claim 1-14 any one of them sheet molding compounds, which is characterized in that the method includes
Following steps：
(1) modified unsaturated polyester resin and low shrinkage additive are positioned in agitator, stirred；
(2) curing agent is added in into the mixed slurry that step (1) stirs evenly, stirred；
(3) modified calcium carbonate, aluminium hydroxide and releasing agent, stirring are added in into the slurry that step (2) stirs evenly；
(4) thickener is added in into the slurry that step (3) stirs evenly, stirs, obtain resin paste；
(5) produced SMC production lines in the resin paste that step (4) obtains：Resin paste is defeated by resin paste delivery platform
It is sent on bearing film, a roller draws continuously-directional glass fiber longitudinally through pressure roll, and another roller continuous glass fibre passes through
Cutter is chopped, and forms short glass fiber, is compounded with continuously-directional glass fiber, the old resin paste being laid on bearing film
On, while covered with the upper film coated with resin paste, SMC sheet is made, is then driven away by crawler belt extrusion and is confined in interlayer
Within air, and realize dipping, sheet molding compound completes.
16. according to the method for claim 15, which is characterized in that the rotating speed of step (1) described stirring is 800~1000r/
min。
17. according to the method for claim 15, which is characterized in that the time of step (1) described stirring is 1~2min.
18. according to the method for claim 15, which is characterized in that the rotating speed of step (2) described stirring is 500~700r/
min。
19. according to the method for claim 15, which is characterized in that the time of step (2) described stirring is 2~3min.
20. according to the method for claim 15, which is characterized in that the rotating speed of step (3) described stirring for 1000~
1200r/min。
21. according to the method for claim 15, which is characterized in that the time of step (3) described stirring is 5~10min.
22. according to the method for claim 15, which is characterized in that the rotating speed of step (4) described stirring is 500~700r/
min。
23. according to the method for claim 15, which is characterized in that the time of step (4) described stirring is 2~3min.
24. according to claim 15-23 any one of them methods, which is characterized in that during the method further includes in step (1)
The step of adding technology auxiliary agent and/or pigment.
25. according to claim 15-23 any one of them methods, which is characterized in that the method is additionally included in step (2)
The step of adding antioxidant.
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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 |
| 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 |
| CN110534895B (en) * | 2018-05-26 | 2021-09-03 | 广东延春高新材料科技股份有限公司 | Low-dielectric constant glass fiber reinforced plastic antenna housing and production process thereof |
| CN110534896B (en) * | 2018-05-26 | 2021-09-03 | 广东延春高新材料科技股份有限公司 | Low-density glass fiber reinforced plastic antenna housing and production process thereof |
| 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 |
| CN109334190B (en) * | 2018-09-14 | 2021-04-06 | 无锡新宏泰电器科技股份有限公司 | Electromagnetic shielding type 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 |
| 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 |
| CN111777846B (en) * | 2020-07-03 | 2023-02-03 | 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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