CN108034212A - A kind of preparation method of low-shrinkage flame retardant type sheet molding compound - Google Patents
A kind of preparation method of low-shrinkage flame retardant type sheet molding compound Download PDFInfo
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- CN108034212A CN108034212A CN201711363318.6A CN201711363318A CN108034212A CN 108034212 A CN108034212 A CN 108034212A CN 201711363318 A CN201711363318 A CN 201711363318A CN 108034212 A CN108034212 A CN 108034212A
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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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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/16—Halogen-containing compounds
- C08K2003/166—Magnesium halide, e.g. magnesium chloride
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Reinforced Plastic Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a kind of preparation method of low-shrinkage flame retardant type sheet molding compound, belong to sheet molding compound preparing technical field.Glass fibre is modified using silane coupling agent, play the role of between the two phases " bridge ", both are firmly connected together, effectively improve the caking property between glass fibre and matrix, in addition the thermal coefficient of expansion of glass fibre is smaller than matrix, the shrinkage ratio matrix smaller of glass fibre, so as to reduce the shrinking percentage of sheet molding compound, improves the surface gloss of sheet molding compound；The present invention carries out surface modification using silane coupling agent to calcium carbonate, improve the compatibility of calcium carbonate and resin, the shrinking percentage of sheet molding compound is reduced to be improved with surface gloss, phosphoric acid is continued with to be modified magnesium chloride hexahydrate and caustic magnesite in powder, in combustion, the Char Residues Structure of densification occurs in matrix surface, plays heat-insulated effect, be conducive to the anti-flammability of sheet molding compound, be with a wide range of applications.
Description
Technical field
The invention discloses a kind of preparation method of low-shrinkage flame retardant type sheet molding compound, belongs to sheet molding compound preparation
Technical field.
Background technology
SMC is the abbreviation of Sheet molding compound, i.e. sheet molding compound.It is in earlier 1960s
Europe is primarily occur inned, in or so nineteen sixty-five, U.S., developed this technique day in succession.Foreign countries have been introduced the end of the eighties in China
Advanced SMC production lines and production technology.SMC has superior electric property, corrosion resistance, and light and engineering design is held
Easily, the advantages that flexible, its mechanical performance can compare favourably with part metals material, thus be widely used in haulage vehicle, building,
In the industry such as electric.
Electrical insulating material is the key foundation material for manufacturing electrical equipment, can to the service life and operation of electrical equipment
There is conclusive effect by property.With development of China's power industry to high voltage large capcity and long-distance sand transport etc.,
Quality and reliability to electrical insulating material propose increasingly higher demands, the insulation of the various function admirables of research and development
Material is the popular tendency of current electrical insulating material development.Electrical equipment is that one kind demands strict technology, and security reliability is high
The staple product having a large capacity and a wide range.It is directly related to country's power generation, the defeated safety for becoming power distribution network and huge numbers of families' electricity consumption and can
Lean on.In the electrical apparatus, for plastic part as important insulation parts, not requiring nothing more than plastic part has high electric insulating quality
Energy, i.e., high electrical insulating property, dielectric strength, surface resistivity and volume resistivity etc. and certain mechanical strength, and require
Quite stable, excellent fire-retardant and arc resistant are kept under the effect of the factors such as humidity, temperature, electric field and mechanical force.Mould in China
Material industry provides substantial amounts of plastic material for electrical industry innovation and development.Sheet molding compound extensive use in electrical industry,
Complicated shape, thin-walled size, high-precision plastics electric parts can be processed and formed at one time, so that minimized for electrical equipment,
The technological innovations such as thin-walled property, modularization, intelligence and high performance provide material guarantee.
With being getting faster for sheet molding compound development, sheet currently on the market also higher and higher to its performance requirement
The molding shrinkage of moulding compound is usually 0.1%~1%, if if this sheet molding compound is pressed into door-plate, can influence door-plate
Surface smoothness, reduce door-plate product qualification rate.
Therefore, invent that a kind of shrinking percentage is low and the sheet molding compound of good flame retardation effect is to sheet molding compound preparing technical field
With positive effect.
The content of the invention
The technical problems to be solved by the invention：For current common sheet molding compound, there are shrinking percentage height, lustrous surface
The defects of spending low and poor fire, can not meet the market demand, there is provided a kind of low-shrinkage flame retardant type sheet molding compound
Preparation method.
In order to solve the above technical problems, the present invention is using technical solution as described below：
A kind of preparation method of low-shrinkage flame retardant type sheet molding compound, it is characterised in that specifically preparation process is：
（1）Weighing 80~100g magnesites and be put into high temperature furnace and calcine, cool, grinding discharging, obtains caustic magnesite in powder, then
Magnesium chloride hexahydrate, phosphoric acid and deionized water are mixed, obtain mixture, continues to mix in mixture and caustic magnesite in powder and stirs
Mix, stirring is placed on sealing in normal temperature air and condenses hardening, and discharging, obtains modified self-control crystal；
（2）Weigh and 100 mesh sieves are crossed after 20~30g calcium carbonate is ground, sieving calcium carbonate powder is collected, by the Paris white that sieves
End and silane coupling agent KH-560 are mixed, and obtain modified calcium carbonate powder；
（3）Polystyrene, styrene-butadiene block copolymer and styrene are mixed to be placed in beaker and stirred, discharges, obtains
Make mixture by oneself；
（4）Count in parts by weight, weigh 30~40 parts of unsaturated polyester (UP)s respectively, crystals are made in 12~16 parts of modifications by oneself, 8~10 parts
Modified calcium carbonate powder and 6~8 parts of self-control mixtures mixing are placed in mixer and stir, then add 3~5 parts of potassium peroxydisulfates, 2~
4 parts of hydroquinones and 1~3 part of gelatin, continue to keep rotating speed to be mixed, and obtain self-made resin paste；
（5）Glass fibre and Silane coupling reagent KH-570 are mixed, obtain modified glass-fiber, then by above-mentioned self-made resin
Paste and modified glass-fiber mixing are placed in compregnate in SMC sheet production unit and are molded, and sheet molding media sheet are obtained, by sheet mould
Plastic sheet is put into baking oven and is thickened, cooling discharging, you can low-shrinkage flame retardant type sheet molding compound is made.
Step（1）The calcining heat is 950~1050 DEG C, and calcination time is 1~2h, magnesium chloride hexahydrate, phosphoric acid and
The mass ratio of deionized water is 4：1：15, mixing time is 20~30min, and the mass ratio of mixture and caustic magnesite in powder is 3：1,
The mixing time is 45~60min, and condensation firm time is 20~30min.
Step（2）The time that grinds is 8~10min, and sieve calcium carbonate powder and silane coupling agent KH-560
Mass ratio be 3：1, mixing time is 12~16min.
Step（3）The mass ratio of the polystyrene, styrene-butadiene block copolymer and styrene is 1：1：3,
Whipping temp is 55~65 DEG C, and mixing time is 35~45min.
Step（4）The speed of agitator is 300~500r/min, and mixing time is 6~8min, continues mixing time and is
16~20min.
Step（5）The glass fibre and the mass ratio of Silane coupling reagent KH-570 are 4：1, it is 20 that the time, which is mixed,
The mass ratio of~30min, self-made resin paste and modified glass-fiber is 3：1, forming temperature is 140~160 DEG C, and bodying temperature is
45~55 DEG C, the thickening time is 8~10h.
Compared with other methods, advantageous effects are the present invention：
（1）Using unsaturated polyester (UP) as matrix, modified self-control crystal, modified calcium carbonate powder, make mixture by oneself and change the present invention
Property glass fibre is aided with potassium peroxydisulfate, hydroquinone and gelatin etc. and the fire-retardant matrix of low-shrinkage is prepared as reinforcing agent
Shape moulding compound, is modified glass fibre first with silane coupling agent, due to silane coupling agent have in chemical constitution it is double
Functional group, one end and the fiberglass surfacing of active functional group react to form chemical bond, and the other end gathers with unsaturation
Chemical reaction or physical entanglement occur for ester group body, so as to play the role of " bridge " between the two phases, both are firmly connected in
Together, the caking property between glass fibre and matrix is effectively improved, in addition the thermal coefficient of expansion of glass fibre is smaller than matrix, its
When curing postcooling cooling, the shrinkage ratio matrix smaller of glass fibre, with the increase of content of glass fiber, so as to reduce piece
The shrinking percentage of shape moulding compound, and improve the surface gloss of sheet molding compound；
（2）The present invention using silane coupling agent to calcium carbonate carry out surface modification, since calcium carbonate granule is sphere, when resin with
When calcium carbonate mixes, calcium carbonate is wrapped in inside by resin, assume responsibility for the effect of core, so as to reach the effect for reducing and shrinking, carbon
After sour calcium surface modification treatment, the compatibility of calcium carbonate and resin is improved, calcium carbonate powder is dispersed in inside resin
In hole, be conducive to that resin internal void is more closely knit, be reduced the shrinking percentage of sheet molding compound and obtained with surface gloss
To raising, continue with phosphoric acid and magnesium chloride hexahydrate and caustic magnesite in powder are modified, make magnesium chloride hexahydrate and caustic magnesite in powder
Stability in water is improved, since self-control crystal absorbs a large amount of latent heat while dehydration, it is suppressed that substrate molecule
Chain break and endothermic decomposition, while the moisture for thermally decomposing generation dilutes the concentration of matrix surface oxygen and fuel gas again,
Reduce the generation of fuel gas, in addition in combustion, the Char Residues Structure of densification occurs in matrix surface, this structure can be with
The isolation film of closing is formed, heat-insulated effect is played, is conducive to the anti-flammability of sheet molding compound, before having a wide range of applications
Scape.
Embodiment
Weigh 80~100g magnesites to be put into high temperature furnace, 1~2h, cooling drop are calcined at being 950~1050 DEG C in temperature
Temperature, grinding discharging, obtains caustic magnesite in powder, then by magnesium chloride hexahydrate, phosphoric acid and deionized water is 4 in mass ratio：1：15 mixing
20~30min is stirred, obtains mixture, continues to be 3 in mass ratio：1 mixture and caustic magnesite in powder be mixed 45~
60min, stirring are placed on sealing in normal temperature air and condense 20~30min of hardening, and discharging, obtains modified self-control crystal；Weigh
20~30g calcium carbonate crosses 100 mesh sieves after grinding 8~10min, collects sieving calcium carbonate powder, is in mass ratio 3：1 incited somebody to action
Sieve calcium carbonate powder and 12~16min is mixed in silane coupling agent KH-560, obtain modified calcium carbonate powder；It is in mass ratio
1：1：3 are placed in the mixing of polystyrene, styrene-butadiene block copolymer and styrene in beaker, are 55~65 in temperature
35~45min is stirred at DEG C, discharging, obtains self-control mixture；Count in parts by weight, weigh 30~40 parts of unsaturations respectively and gather
Ester, 12~16 parts of modified self-control crystals, 8~10 parts of modified calcium carbonate powder and 6~8 parts of self-control mixture mixing are placed in stirring
In machine, rotating speed be 300~500r/min under stir 6~8min, then add 3~5 parts of potassium peroxydisulfates, 2~4 parts of hydroquinones and
1~3 part of gelatin, continues to keep rotating speed that 16~20min is mixed, and obtains self-made resin paste；It is 4 in mass ratio：1 by glass fibers
20~30min is mixed in peacekeeping Silane coupling reagent KH-570, obtains modified glass-fiber, is in mass ratio 3：1 sets self-control
Fat is pasted and modified glass-fiber mixing is placed in SMC sheet production unit, and compregnate is molded at being 140~160 DEG C in temperature, is obtained
Sheet molding media sheet, sheet molding media sheet is put into baking oven, is thickened 8~10h at being 45~55 DEG C in temperature, is cooled down out
Material, you can low-shrinkage flame retardant type sheet molding compound is made.
Example 1
Weigh 80g magnesites to be put into high temperature furnace, calcine 1h at being 950 DEG C in temperature, cool, grinding discharging, obtains light
Burn magnesium oxychloride, then by magnesium chloride hexahydrate, phosphoric acid and deionized water in mass ratio be 4：1：15 are mixed 20min, are mixed
Thing, continues to be 3 in mass ratio：45min is mixed in mixture and caustic magnesite in powder by 1, and stirring is placed on close in normal temperature air
Envelope condenses hardening 20min, and discharging, obtains modified self-control crystal；Weigh after 20g calcium carbonate grinds 8min and cross 100 mesh sieves,
Sieving calcium carbonate powder is collected, is in mass ratio 3：1 will sieving calcium carbonate powder and silane coupling agent KH-560 mixings
12min, obtains modified calcium carbonate powder；It is 1 in mass ratio：1：3 by polystyrene, styrene-butadiene block copolymer and
Styrene mixing is placed in beaker, is stirred 35min at being 55 DEG C in temperature, is discharged, obtains self-control mixture；In parts by weight
Meter, weighs 30 parts of unsaturated polyester (UP)s, 12 parts of modified self-control crystals, 8 parts of modified calcium carbonate powder and 6 parts of self-control mixtures respectively
Mixing is placed in mixer, stirs 6min in the case where rotating speed is 300r/min, then add 3 parts of potassium peroxydisulfates, 2 parts of hydroquinones and 1
Part gelatin, continues to keep rotating speed that 16min is mixed, and obtains self-made resin paste；It is 4 in mass ratio：1 by glass fibre and silane
20min is mixed in coupling agent kh-570, obtains modified glass-fiber, is in mass ratio 3：Glass is pasted and be modified to self-made resin by 1
The mixing of glass fiber is placed in SMC sheet production unit, and compregnate is molded at being 140 DEG C in temperature, obtains sheet molding media sheet, will
Sheet molding media sheet is put into baking oven, is thickened 8h, cooling discharging at being 45 DEG C in temperature, you can low-shrinkage flame retardant type is made
Sheet molding compound.
Example 2
Weigh 90g magnesites to be put into high temperature furnace, calcine 1.5h at being 1000 DEG C in temperature, cool, grinding discharging, obtains
Caustic magnesite in powder, then by magnesium chloride hexahydrate, phosphoric acid and deionized water in mass ratio be 4：1：15 are mixed 25min, are mixed
Compound, continues to be 3 in mass ratio：50min is mixed in mixture and caustic magnesite in powder by 1, and stirring is placed in normal temperature air
Sealing condenses hardening 25min, and discharging, obtains modified self-control crystal；Weigh after 25g calcium carbonate grinds 9min and cross 100 mesh
Sieve, collects sieving calcium carbonate powder, is in mass ratio 3：1 will sieving calcium carbonate powder and silane coupling agent KH-560 mixings
14min, obtains modified calcium carbonate powder；It is 1 in mass ratio：1：3 by polystyrene, styrene-butadiene block copolymer and
Styrene mixing is placed in beaker, is stirred 40min at being 60 DEG C in temperature, is discharged, obtains self-control mixture；In parts by weight
Meter, weighs 35 parts of unsaturated polyester (UP)s, 14 parts of modified self-control crystals, 9 parts of modified calcium carbonate powder and 7 parts of self-control mixtures respectively
Mixing is placed in mixer, stirs 7min in the case where rotating speed is 400r/min, then add 4 parts of potassium peroxydisulfates, 3 parts of hydroquinones and 2
Part gelatin, continues to keep rotating speed that 18min is mixed, and obtains self-made resin paste；It is 4 in mass ratio：1 by glass fibre and silane
25min is mixed in coupling agent kh-570, obtains modified glass-fiber, is in mass ratio 3：Glass is pasted and be modified to self-made resin by 1
The mixing of glass fiber is placed in SMC sheet production unit, and compregnate is molded at being 150 DEG C in temperature, obtains sheet molding media sheet, will
Sheet molding media sheet is put into baking oven, is thickened 9h, cooling discharging at being 50 DEG C in temperature, you can low-shrinkage flame retardant type is made
Sheet molding compound.
Example 3
Weigh 100g magnesites to be put into high temperature furnace, calcine 2h at being 1050 DEG C in temperature, cool, grinding discharging, obtains
Caustic magnesite in powder, then by magnesium chloride hexahydrate, phosphoric acid and deionized water in mass ratio be 4：1：15 are mixed 30min, are mixed
Compound, continues to be 3 in mass ratio：60min is mixed in mixture and caustic magnesite in powder by 1, and stirring is placed in normal temperature air
Sealing condenses hardening 30min, and discharging, obtains modified self-control crystal；Weigh after 30g calcium carbonate grinds 10min and cross 100 mesh
Sieve, collects sieving calcium carbonate powder, is in mass ratio 3：1 will sieving calcium carbonate powder and silane coupling agent KH-560 mixings
16min, obtains modified calcium carbonate powder；It is 1 in mass ratio：1：3 by polystyrene, styrene-butadiene block copolymer and
Styrene mixing is placed in beaker, is stirred 45min at being 65 DEG C in temperature, is discharged, obtains self-control mixture；In parts by weight
Meter, weighs 40 parts of unsaturated polyester (UP)s, 16 parts of modified self-control crystals, 10 parts of modified calcium carbonate powder and 8 parts of self-control mixing respectively
Thing mixing be placed in mixer, rotating speed be 500r/min under stir 8min, then add 5 parts of potassium peroxydisulfates, 4 parts of hydroquinones and
3 parts of gelatin, continue to keep rotating speed that 20min is mixed, and obtain self-made resin paste；It is 4 in mass ratio：1 by glass fibre and silicon
30min is mixed in alkane coupling agent kh-570, obtains modified glass-fiber, is in mass ratio 3：Self-made resin is pasted and is modified by 1
Glass fibre mixing is placed in SMC sheet production unit, and compregnate is molded at being 160 DEG C in temperature, obtains sheet molding media sheet,
Sheet molding media sheet is put into baking oven, is thickened 10h, cooling discharging at being 55 DEG C in temperature, you can low-shrinkage resistance is made
Combustion type sheet molding compound.
Comparative example
With the low-shrinkage flame retardant type sheet molding compound of Hebei company production as a comparison case to lower shrinkage produced by the present invention
Low-shrinkage flame retardant type sheet molding compound in rate flame retardant type sheet molding compound and comparative example carries out performance detection, and testing result is such as
Shown in table 1：
1st, test method：
Flame retardant rating test is by flame retardant rating by HB, and incremental standard is detected step by step to V-0 by V-2, V-1；
Oxygen index (OI) test carries out performance detection using oxygen index measurer；
Shrinking percentage test is detected by 15585 standards of GB/T；
Glossiness test is detected using LS192 Grossmeters.
Table 1
The good flame retardation effect of low-shrinkage flame retardant type sheet molding compound produced by the present invention according to above-mentioned middle data, fire-retardant etc.
Level reaches V-0 grades, and shrinking percentage is low, and minimum to reach 0.01%, glossiness is high, reaches 92%, has broad application prospects.
Claims (6)
1. a kind of preparation method of low-shrinkage flame retardant type sheet molding compound, it is characterised in that specifically preparation process is：
（1）Weighing 80~100g magnesites and be put into high temperature furnace and calcine, cool, grinding discharging, obtains caustic magnesite in powder, then
Magnesium chloride hexahydrate, phosphoric acid and deionized water are mixed, obtain mixture, continues to mix in mixture and caustic magnesite in powder and stirs
Mix, stirring is placed on sealing in normal temperature air and condenses hardening, and discharging, obtains modified self-control crystal；
（2）Weigh and 100 mesh sieves are crossed after 20~30g calcium carbonate is ground, sieving calcium carbonate powder is collected, by the Paris white that sieves
End and silane coupling agent KH-560 are mixed, and obtain modified calcium carbonate powder；
（3）Polystyrene, styrene-butadiene block copolymer and styrene are mixed to be placed in beaker and stirred, discharges, obtains
Make mixture by oneself；
（4）Count in parts by weight, weigh 30~40 parts of unsaturated polyester (UP)s respectively, crystals are made in 12~16 parts of modifications by oneself, 8~10 parts
Modified calcium carbonate powder and 6~8 parts of self-control mixtures mixing are placed in mixer and stir, then add 3~5 parts of potassium peroxydisulfates, 2~
4 parts of hydroquinones and 1~3 part of gelatin, continue to keep rotating speed to be mixed, and obtain self-made resin paste；
（5）Glass fibre and Silane coupling reagent KH-570 are mixed, obtain modified glass-fiber, then by above-mentioned self-made resin
Paste and modified glass-fiber mixing are placed in compregnate in SMC sheet production unit and are molded, and sheet molding media sheet are obtained, by sheet mould
Plastic sheet is put into baking oven and is thickened, cooling discharging, you can low-shrinkage flame retardant type sheet molding compound is made.
A kind of 2. preparation method of low-shrinkage flame retardant type sheet molding compound according to claim 1, it is characterised in that：Step
Suddenly（1）The calcining heat is 950~1050 DEG C, and calcination time is 1~2h, magnesium chloride hexahydrate, phosphoric acid and deionized water
Mass ratio is 4：1：15, mixing time is 20~30min, and the mass ratio of mixture and caustic magnesite in powder is 3：1, during mixing
Between be 45~60min, condensation firm time is 20~30min.
A kind of 3. preparation method of low-shrinkage flame retardant type sheet molding compound according to claim 1, it is characterised in that：Step
Suddenly（2）The time that grinds is 8~10min, and the mass ratio of sieving calcium carbonate powder and silane coupling agent KH-560 are
3：1, mixing time is 12~16min.
A kind of 4. preparation method of low-shrinkage flame retardant type sheet molding compound according to claim 1, it is characterised in that：Step
Suddenly（3）The mass ratio of the polystyrene, styrene-butadiene block copolymer and styrene is 1：1：3, whipping temp is
55~65 DEG C, mixing time is 35~45min.
A kind of 5. preparation method of low-shrinkage flame retardant type sheet molding compound according to claim 1, it is characterised in that：Step
Suddenly（4）The speed of agitator is 300~500r/min, and mixing time is 6~8min, and continuation mixing time is 16~20min.
A kind of 6. preparation method of low-shrinkage flame retardant type sheet molding compound according to claim 1, it is characterised in that：Step
Suddenly（5）The glass fibre and the mass ratio of Silane coupling reagent KH-570 are 4：1, the mixing time is 20~30min, from
The mass ratio of resin paste processed and modified glass-fiber is 3：1, forming temperature is 140~160 DEG C, and bodying temperature is 45~55 DEG C,
Thickening time is 8~10h.
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|---|---|---|---|---|
| CN102358798A (en) * | 2011-09-13 | 2012-02-22 | 青岛润兴高分子材料有限公司 | High strength sheet molding plastics and production method |
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| CN105885376A (en) * | 2016-06-16 | 2016-08-24 | 无锡新宏泰电器科技股份有限公司 | Flaky molding material and preparation method thereof |
| CN107227008A (en) * | 2016-03-24 | 2017-10-03 | 成都兰腾科技有限公司 | Laminar film plastic and processing method |
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2017
- 2017-12-18 CN CN201711363318.6A patent/CN108034212A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102358798A (en) * | 2011-09-13 | 2012-02-22 | 青岛润兴高分子材料有限公司 | High strength sheet molding plastics and production method |
| CN105086397A (en) * | 2015-09-08 | 2015-11-25 | 苏州新区佳合塑胶有限公司 | Preparation method of compression molding chopped fiber reinforced resin composite |
| CN107227008A (en) * | 2016-03-24 | 2017-10-03 | 成都兰腾科技有限公司 | Laminar film plastic and processing method |
| CN105885376A (en) * | 2016-06-16 | 2016-08-24 | 无锡新宏泰电器科技股份有限公司 | Flaky molding material and preparation method thereof |
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| 谢文蓓: "不饱和聚酯树脂低收缩改性研究进展", 《粘接》 * |
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Application publication date: 20180515 |