CN107189391A - A kind of preparation method of complex thickener, BMC and BMC - Google Patents
A kind of preparation method of complex thickener, BMC and BMC Download PDFInfo
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- CN107189391A CN107189391A CN201710468815.6A CN201710468815A CN107189391A CN 107189391 A CN107189391 A CN 107189391A CN 201710468815 A CN201710468815 A CN 201710468815A CN 107189391 A CN107189391 A CN 107189391A
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- C08K3/00—Use of inorganic substances as compounding ingredients
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- C08K3/20—Oxides; Hydroxides
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Abstract
The invention provides the preparation method of a kind of complex thickener, BMC and BMC.It is (0.2 2) that the complex thickener, which includes mass ratio,:The chemical thickening agent and physics thickener of (5 30), the one kind or at least two combination of the physics thickener in crystallinity unsaturated polyester resin, crystallinity saturated polyester resin, Cristalline epoxy resin or crystallinity vinylite.The BMC includes the raw material components of following weight/mass percentage composition：Matrix resin 50 70%, the complex thickener 7 30%, shrinking agent 10 20%, glass fibre 5 10% and initiator 1 5%.The BMC is prepared by the method for substep mixing.The complex thickener that the present invention is provided can effectively improve the processing fluidity of BMC, and the energy consumption in reduction production extends the mold use life-span.
Description
Technical field
The invention belongs to BMC technical field, and in particular to a kind of complex thickener, BMC and bulk
The preparation method of moulding compound.
Background technology
BMC (Bulk Molding Compound, BMC) is that unsaturated polyester resin or other modified resins are multiple
A kind of intermediateness material of laminate article, because having the advantages that light-high-strength, antidetonation, endurance, and aviation, automobile,
The fields such as electronic equipment, electrical equipment and electrical, mechanical attachment, machine interior trim are widely used.In addition, BMC also has lower shrinkage
Property, other premium properties such as electrical insulating property and anti-flammability, become the focus studied in recent years with application.
BMC thermal coefficient of expansion and molding shrinkage is all than relatively low, with preferable moulded manufacturability, higher shaping system
Product dimensional accuracy and stability.At present, BMC forming method mainly has compression molding, injection moulding and die casting (transmission) shaping.
In general, compression molding is applied to the production of large and medium-sized product, and die cast and injection moulding, especially injection moulding
It is suitable for the large-scale production of medium and small product.These three techniques can prepare that two sides is bright and clean, superior in quality product, wherein
More conventional is die press technology for forming and injection molding technique.
BMC generally comprises the raw material components such as matrix resin, filler, glass fibre, initiator, thickener and shrinking agent.
Because the matrix resin for being generally used for BMC is liquid at normal temperatures, viscosity is relatively low, it is therefore desirable to it is increased using thickener
It is thick, facilitate following process.Industrial the most frequently used thickener is calcium oxide, magnesia, calcium hydroxide and magnesium hydroxide.But by
The BMC mobility of this kind of thickener thickening is poor, in compression molding, it is necessary to which larger pressure makes BMC materials in die cavity
Middle flowing, this is scattered in system not only bad for glass fibre, moreover, higher pressure can also cause mould loss and
Producing cost increase, a series of problems, such as production efficiency declines.
CN 105566859A disclose a kind of SMC/BMC method for thickening, by being modified to shrinking agent, make its with
Conventional thickener reaction, so that the purpose of increase system viscosity is better achieved.But the method for thickening has still continued to use tradition
The thickener such as calcium oxide, magnesia, calcium hydroxide, magnesium hydroxide, BMC processing fluidity can not be improved.CN
105017739A discloses BMC moulding compounds of a kind of high-strength light and preparation method thereof, by adding hollow calomel mercurous chloride microballon, both protects
The intensity of BMC is held, its density is reduced again.Likewise, this document is not related to the improvement for BMC processing flowabilities yet.
Therefore, the processing fluidity of BMC how is improved, the loss of mould in BMC process is reduced, is this area
Urgent problem to be solved.
The content of the invention
In view of the deficienciess of the prior art, it is an object of the invention to provide a kind of complex thickener, BMC
And the preparation method of BMC.The complex thickener can effectively improve the processing fluidity of BMC, reduction production
In energy consumption, extend the mold use life-span.
For up to this purpose, the present invention uses following technical scheme：
In a first aspect, the present invention provides a kind of complex thickener, including chemical thickening agent and physics thickener, the chemistry
The mass ratio of thickener and the physics thickener is (0.2-2):(5-30)；For example can be 0.2:30、0.2:25、0.2:
20、0.2:15、0.2:10、0.2:5、0.5:30、0.5:25、0.5:20、0.5:15、0.5:10、0.5:5、1:25、1:15、1:
11、2:25、2:18、2:15、2:10 or 2:5 etc.；
The physics thickener is selected from crystallinity unsaturated polyester resin, crystallinity saturated polyester resin, crystallinity epoxy
Resin or one kind in crystallinity vinylite or at least two combination；It for example can be crystallinity unsaturated polyester resin
Combination, the combination of crystallinity unsaturated polyester resin and Cristalline epoxy resin with crystallinity saturated polyester resin, crystallinity
Combination or Cristalline epoxy resin and the group of crystallinity vinylite of the unsaturated polyester resin with crystallinity vinylite
Close etc..
It is liquid under normal temperature (25 DEG C) to be commonly used for the matrix resin of BMC, and viscosity is relatively low, it is therefore desirable to adopt
It is thickened with thickener.Industrially conventional thickener is chemical thickening agent, but the bulk prepared by this kind of thickener
The processing fluidity of moulding compound is poor, and the present invention is by selecting specific physics thickener (being solid-state under normal temperature), by specific
Proportioning coordinates with chemical thickening agent, has obtained a kind of complex thickener, can effectively improve the processing fluidity of BMC.
Preferably, one kind in calcium hydroxide, magnesium hydroxide, calcium oxide or magnesia of the chemical thickening agent or extremely
Few two kinds combination；For example can be combination, the hydroxide of combination, calcium hydroxide and the calcium oxide of calcium hydroxide and magnesium hydroxide
Combination, the combination of magnesium hydroxide and calcium oxide or combination of calcium oxide and magnesia of calcium and magnesia etc..
Preferably, the crystallinity unsaturated polyester resin is selected from crystallinity metaphenylene unsaturated polyester resin, crystallinity
M-phthalate unsaturated polyester resin or one kind in crystallinity terephthalic unsaturated polyester resin or at least two combination.
Preferably, the crystallinity metaphenylene unsaturated polyester resin is M-phthalic acid, maleic anhydride and new penta
The polycondensation product of glycol.
Preferably, the crystallinity m-phthalate unsaturated polyester resin is phthalic acid, maleic anhydride and new penta
The polycondensation product of glycol.
Preferably, the crystallinity terephthalic unsaturated polyester resin is terephthalic acid (TPA), maleic anhydride and new penta
The polycondensation product of glycol.
Preferably, the crystallinity saturated polyester resin is selected from the adjacent benzene of crystallinity metaphenylene saturated polyester resin, crystallinity
Type saturated polyester resin or one kind in crystallinity p-phenyl's saturated polyester resin or at least two combination.
Preferably, the crystallinity metaphenylene saturated polyester resin is the contracting of M-phthalic acid, adipic acid and neopentyl glycol
Poly- product.
Preferably, the adjacent benzene-type saturated polyester resin of the crystallinity is the contracting of phthalic acid, adipic acid and neopentyl glycol
Poly- product.
Preferably, the crystallinity p-phenyl saturated polyester resin is the contracting of terephthalic acid (TPA), adipic acid and neopentyl glycol
Poly- product.
Preferably, the Cristalline epoxy resin is selected from crystallinity bisphenol A type epoxy resin and/or crystallinity epoxy novolac
Resin.
Preferably, the crystallinity vinylite is selected from crystallinity bisphenol type epoxy vinylite, crystallinity phenolic aldehyde
Epoxy vingl ester resin or one kind in crystallinity vinyltoluene polyester resin or at least two combination.
Second aspect, the present invention provides a kind of BMC, and its raw material components includes above-mentioned complex thickener.
Preferably, the BMC is based on weight/mass percentage composition, including the following raw material component：
The mass fraction of described matrix resin can be 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%,
58%th, 59%, 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69% or 70% etc..
The mass fraction of the complex thickener can be 7%, 8%, 9%, 10%, 11%, 12%, 15%, 18%,
20%th, 22%, 25%, 28% or 30% etc..
The mass fraction of the shrinking agent can be 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%,
18%th, 19% or 20% etc..
The mass fraction of the glass fibre can be 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%,
9%th, 9.5% or 10% etc..
The mass fraction of the initiator can be 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5% or
5% etc..
Preferably, described matrix resin is selected from the unsaturated polyester resin, epoxy resin, vinyl tree for liquid under normal temperature
Fat or phenolic resin.
Preferably, the shrinking agent is selected from polymethyl methacrylate, polystyrene, polyvinyl acetate or saturation and gathered
One kind or at least two combination in ester for example can be polymethyl methacrylates and the combining of polystyrene, poly- methyl
The combination of methyl acrylate and polyvinyl acetate, the combination of polymethyl methacrylate and saturated polyester, polystyrene with it is poly-
Combination, the combination of polystyrene and saturated polyester or combination of polyvinyl acetate and saturated polyester of vinylacetate etc..
Preferably, the enhancing material is glass fibre.
Preferably, the length of the glass fibre is 5-20mm；For example can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm,
11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm or 20mm etc..
Preferably, the initiator is selected from peroxidized t-butyl perbenzoate (TBPB), the peroxidating -2- ethyl acid tert-butyl esters
(TBPO), azodiisobutyronitrile (AIBN) or one kind in dibenzoyl peroxide (BPO) or at least two combination；For example may be used
Be TBPB and TBPO combination, TBPB and AIBN combination, TBPB and BPO combination, TBPO and AIBN combination, TBPO with
BPO combination or AIBN and BPO combination etc..
The third aspect, the present invention provides a kind of preparation method of above-mentioned BMC, comprises the following steps：
(1) first the matrix resin, initiator and shrinking agent of formula ratio are mixed, obtains the first mixed material；
(2) the physics thickener of formula ratio is mixed with first mixed material, obtains the second mixed material；
(3) chemical thickening agent of formula ratio is mixed with second mixed material, obtains the 3rd mixed material；
(4) glass fibre of formula ratio is mixed with the 3rd mixed material, obtains the BMC.
Preferably, the mixing described in step 1-4 is carried out in kneader.
Preferably, the time mixed described in step (1) is 0.5-1 hours；For example can be 0.5 hour, 0.6 hour,
0.7 hour, 0.8 hour, 0.9 hour or 1 hour etc..
Preferably, the time mixed described in step (2) is 0.2-0.5 hours；For example can be 0.2 hour, it is 0.3 small
When, 0.4 hour or 0.5 hour etc..
Preferably, the time mixed described in step (3) is 0.3-0.6 hours；For example can be 0.3 hour, it is 0.4 small
When, 0.5 hour or 0.6 hour etc..
Preferably, the time mixed described in step (4) is 0.5-1 hours；For example can be 0.5 hour, 0.6 hour,
0.7 hour, 0.8 hour, 0.9 hour or 1 hour etc..
Preferably, the preparation method comprises the following steps：
(1) first the matrix resin, initiator and shrinking agent of formula ratio are added in kneader, mediates 0.5-1 hours, obtain
To the first mixed material；
(2) by the physics thickener of formula ratio together with first mixed material in kneader mediate 0.2-0.5 it is small
When, obtain the second mixed material；
(3) by the chemical thickening agent of formula ratio together with second mixed material in kneader mediate 0.3-0.6 it is small
When, obtain the 3rd mixed material；
(4) by the glass fibre of formula ratio together with the 3rd mixed material in kneader mediate 0.5-1 hours, obtain
To the BMC.
Compared with prior art, the invention has the advantages that：
The present invention is coordinated by specific proportioning and chemical thickening agent by selecting specific physics thickener, has obtained one
Complex thickener is planted, the processing fluidity of BMC is can effectively improve.Compared to the bulk of addition equivalent chemical thickening agent
Moulding compound, the Spiral flow length of BMC prepared by complex thickener provided by the present invention adds 15-25%, has
There is more preferable processing fluidity.
Embodiment
Technical scheme is further illustrated below by specific embodiment.Those skilled in the art should be bright
, the embodiment be only to aid in understand the present invention, be not construed as to the present invention concrete restriction.
Unless otherwise specified, the state of material is state under normal temperature in the present invention, and normal temperature refers both to 25 DEG C in the present invention.
Embodiment 1
A kind of complex thickener, by calcium hydroxide and crystallinity unsaturated polyester resin in mass ratio 2:10 compositions.
A kind of BMC for including above-mentioned complex thickener, includes the raw material components of following mass fraction：
Wherein, the length of glass fibre is 5mm.
The preparation method of above-mentioned BMC comprises the following steps：
(1) first the liquid unsaturated polyester resin, TBPB and polymethyl methacrylate of formula ratio are added in kneader,
Mediate 0.5 hour, obtain the first mixed material；
(2) by the calcium hydroxide of formula ratio together with the first mixed material in kneader mediate 0.5 hour, obtain second
Mixed material；
(3) the crystallinity terephthalic unsaturated polyester resin of formula ratio is pinched in kneader together with the second mixed material
Close 0.3 hour, obtain the 3rd mixed material；
(4) by the glass fibre of formula ratio together with the 3rd mixed material in kneader mediate 0.8 hour, obtain above-mentioned
BMC.
Comparative example 1
Difference with embodiment 1 is in the raw material components of BMC that the mass fraction of calcium hydroxide is 12 parts, knot
Crystalline substance unsaturated polyester resin is 0 part.
The complex thickener that embodiment 1 is provided can effectively improve the processing fluidity of BMC, group prepared therefrom
The Spiral flow length (103cm) of shape moulding compound is carried than the Spiral flow length (85cm) for the BMC that comparative example 1 is provided
It is high by 21%.
Embodiment 2
A kind of complex thickener, by magnesium hydroxide and Cristalline epoxy resin in mass ratio 1:11 compositions.
A kind of BMC for including above-mentioned complex thickener, includes the raw material components of following mass fraction：
Wherein, the length of glass fibre is 10mm.
The preparation method of above-mentioned BMC comprises the following steps：
(1) first the liquid-state epoxy resin, TBPO and polystyrene of formula ratio are added in kneader, mediates 1 hour, obtain
First mixed material；
(2) by the magnesium hydroxide of formula ratio together with the first mixed material in kneader mediate 0.2 hour, obtain second
Mixed material；
(3) the crystallinity bisphenol A type epoxy resin of formula ratio is mediated 0.4 together with the second mixed material in kneader
Hour, obtain the 3rd mixed material；
(4) by the glass fibre of formula ratio together with the 3rd mixed material in kneader mediate 0.5 hour, obtain above-mentioned
BMC.
Comparative example 2
Difference with embodiment 2 is in the raw material components of BMC that the mass fraction of magnesium hydroxide is 12 parts, knot
Crystalline substance epoxy resin is 0 part.
The complex thickener that embodiment 2 is provided can effectively improve the processing fluidity of BMC, group prepared therefrom
The Spiral flow length (99cm) of shape moulding compound is improved than the Spiral flow length (86cm) for the BMC that comparative example 2 is provided
15%.
Embodiment 3
A kind of complex thickener, by calcium oxide and crystallinity vinylite in mass ratio 0.5:20 compositions.
A kind of BMC for including above-mentioned complex thickener, includes the raw material components of following mass fraction：
Wherein, the length of glass fibre is 15mm.
The preparation method of above-mentioned BMC comprises the following steps：
(1) first the liquid ethylene base resin, AIBN and polyvinyl acetate of formula ratio are added in kneader, mediates 0.8
Hour, obtain the first mixed material；
(2) by the calcium oxide of formula ratio together with the first mixed material in kneader mediate 0.3 hour, obtain second mix
Compound material；
(3) kneading in kneader together with the second mixed material by the crystallinity epoxy novolac vinylite of formula ratio
0.6 hour, obtain the 3rd mixed material；
(4) by the glass fibre of formula ratio together with the 3rd mixed material in kneader mediate 1 hour, obtain above-mentioned group
Shape moulding compound.
Comparative example 3
Difference with embodiment 3 is in the raw material components of bulk mould material that the mass fraction of calcium oxide is 20.5 parts, crystallization
Sex ethylene base resin is 0 part.
The complex thickener that embodiment 3 is provided can effectively improve the processing fluidity of BMC, group prepared therefrom
Spiral flow length (85.5cm) of the Spiral flow length (100cm) of shape moulding compound than BMC that comparative example 3 is provided
Improve 17%.
Embodiment 4
A kind of complex thickener, by magnesia and crystallinity saturated polyester resin in mass ratio 2:5 compositions.
A kind of BMC for including above-mentioned complex thickener, includes the raw material components of following mass fraction：
Wherein, the length of glass fibre is 20mm.
The preparation method of above-mentioned BMC comprises the following steps：
(1) first the liquid unsaturated polyester resin, BPO and polystyrene of formula ratio are added in kneader, mediates 0.6 small
When, obtain the first mixed material；
(2) by the magnesia of formula ratio together with the first mixed material in kneader mediate 0.4 hour, obtain second mix
Compound material；
(3) kneading in kneader together with the second mixed material by the crystallinity p-phenyl saturated polyester resin of formula ratio
0.5 hour, obtain the 3rd mixed material；
(4) by the glass fibre of formula ratio together with the 3rd mixed material in kneader mediate 0.6 hour, obtain above-mentioned
BMC.
Comparative example 4
Difference with embodiment 4 is in the raw material components of bulk mould material that the mass fraction of magnesia is 7 parts, crystallinity
Saturated polyester resin is 0 part.
The complex thickener that embodiment 4 is provided can effectively improve the processing fluidity of BMC, group prepared therefrom
The Spiral flow length (98cm) of shape moulding compound is improved than the Spiral flow length (85cm) for the BMC that comparative example 4 is provided
15%.
Embodiment 5
A kind of complex thickener, by magnesium hydroxide and Cristalline epoxy resin in mass ratio 0.2:30 compositions.
A kind of BMC for including above-mentioned complex thickener, includes the raw material components of following mass fraction：
Wherein, the length of glass fibre is 8mm.
The preparation method of above-mentioned BMC comprises the following steps：
(1) first the liquid-state epoxy resin, TBPO and polyvinyl acetate of formula ratio are added in kneader, mediates 0.7 small
When, obtain the first mixed material；
(2) by the magnesium hydroxide of formula ratio together with the first mixed material in kneader mediate 0.3 hour, obtain second
Mixed material；
(3) the crystallinity novolac epoxy resin of formula ratio is mediated in kneader together with the second mixed material 0.4 small
When, obtain the 3rd mixed material；
(4) by the glass fibre of formula ratio together with the 3rd mixed material in kneader mediate 0.7 hour, obtain above-mentioned
BMC.
Comparative example 5
Difference with embodiment 5 is in the raw material components of bulk mould material that the mass fraction of magnesium hydroxide is 15.1 parts, knot
Crystalline substance epoxy resin is 0 part.
The complex thickener that embodiment 5 is provided can effectively improve the processing fluidity of BMC, group prepared therefrom
The Spiral flow length (105cm) of shape moulding compound is carried than the Spiral flow length (86cm) for the BMC that comparative example 5 is provided
It is high by 22%.
Embodiment 6
A kind of complex thickener, by calcium oxide and crystallinity vinylite in mass ratio 2:8 compositions.
A kind of BMC for including above-mentioned complex thickener, includes the raw material components of following mass fraction：
Wherein, the length of glass fibre is 12mm.
The preparation method of above-mentioned BMC comprises the following steps：
(1) first the liquid ethylene base resin, AIBN and polymethyl methacrylate of formula ratio are added in kneader, mediated
0.8 hour, obtain the first mixed material；
(2) by the calcium oxide of formula ratio together with the first mixed material in kneader mediate 0.5 hour, obtain second mix
Compound material；
(3) kneading in kneader together with the second mixed material by the crystallinity epoxy novolac vinylite of formula ratio
0.6 hour, obtain the 3rd mixed material；
(4) by the glass fibre of formula ratio together with the 3rd mixed material in kneader mediate 0.622 hour, obtain
State BMC.
Comparative example 6
Difference with embodiment 6 is in the raw material components of bulk mould material that the mass fraction of calcium oxide is 30 parts, crystallinity
Vinylite is 0 part.
The complex thickener that embodiment 6 is provided can effectively improve the processing fluidity of BMC, group prepared therefrom
The Spiral flow length (100cm) of shape moulding compound is carried than the Spiral flow length (86cm) for the BMC that comparative example 6 is provided
It is high by 16%.
Comparative example 7
Difference with embodiment 1 is that the mass ratio of calcium hydroxide and crystallinity unsaturated polyester resin is 1:2, bulk mould
In the raw material components of material, the mass fraction of calcium hydroxide is 4 parts, and the mass fraction of crystallinity unsaturated polyester resin is 8 parts.
Compared with Example 1, the Spiral flow length (95cm) for the BMC that comparative example 7 is provided have dropped 7.8%.
Comparative example 8
Difference with embodiment 1 is that the mass ratio of calcium hydroxide and crystallinity unsaturated polyester resin is 0.2:40, group
In the raw material components of shape mould material, the mass fraction of calcium hydroxide is 0.06 part, the mass fraction of crystallinity unsaturated polyester resin
For 12 parts.
Compared with Example 1, the Spiral flow length (96cm) for the BMC that comparative example 8 is provided have dropped 6.8%.
The present invention determines the Spiral flow length of BMC using ASTM D3123-98 (2004) method.
In the performance data of above-described embodiment 1-6 and comparative example 1-8 die-filling plastics of group provided, the present invention, change
The effect that thickener and physics thickener under specific proportioning there is collaboration to improve BMC processing fluidity is learned, when adopting
With the chemical thickening agent alternative composite thickener of equivalent, or chemical thickening agent and physics thickener proportioning not in specific scope
When interior, the processing fluidity of obtained BMC significantly decreases.
Applicant states, the foregoing is only the embodiment of the present invention, but protection scope of the present invention not office
It is limited to this, person of ordinary skill in the field is it will be clearly understood that any belong to those skilled in the art and taken off in the present invention
In the technical scope of dew, the change or replacement that can be readily occurred in, within the scope of all falling within protection scope of the present invention and being open.
Claims (10)
1. a kind of complex thickener, it is characterised in that the complex thickener includes chemical thickening agent and physics thickener, described
The mass ratio of chemical thickening agent and the physics thickener is (0.2-2):(5-30)；
The physics thickener is selected from crystallinity unsaturated polyester resin, crystallinity saturated polyester resin, Cristalline epoxy resin
Or one kind in crystallinity vinylite or at least two combination.
2. complex thickener according to claim 1, it is characterised in that the chemical thickening agent is selected from calcium hydroxide, hydrogen
One kind or at least two combination in magnesia, calcium oxide or magnesia.
3. complex thickener according to claim 1 or 2, it is characterised in that the crystallinity unsaturated polyester resin choosing
It is poly- from crystallinity metaphenylene unsaturated polyester resin, crystallinity m-phthalate unsaturated polyester resin or crystallinity p-phenyl unsaturation
One kind or at least two combination in ester resin；
Preferably, the crystallinity metaphenylene unsaturated polyester resin is M-phthalic acid, maleic anhydride and neopentyl glycol
Polycondensation product；
Preferably, the crystallinity m-phthalate unsaturated polyester resin is phthalic acid, maleic anhydride and neopentyl glycol
Polycondensation product；
Preferably, the crystallinity terephthalic unsaturated polyester resin is terephthalic acid (TPA), maleic anhydride and neopentyl glycol
Polycondensation product；
Preferably, the crystallinity saturated polyester resin is selected from the adjacent benzene-type of crystallinity metaphenylene saturated polyester resin, crystallinity and satisfied
With one kind in polyester resin or crystallinity p-phenyl's saturated polyester resin or at least two combination；
Preferably, the crystallinity metaphenylene saturated polyester resin produces for the polycondensation of M-phthalic acid, adipic acid and neopentyl glycol
Thing；
Preferably, the adjacent benzene-type saturated polyester resin of the crystallinity produces for the polycondensation of phthalic acid, adipic acid and neopentyl glycol
Thing；
Preferably, the crystallinity p-phenyl saturated polyester resin produces for the polycondensation of terephthalic acid (TPA), adipic acid and neopentyl glycol
Thing；
Preferably, the Cristalline epoxy resin is selected from crystallinity bisphenol A type epoxy resin and/or crystallinity epoxy novolac tree
Fat；
Preferably, the crystallinity vinylite is selected from crystallinity bisphenol type epoxy vinylite, crystallinity epoxy novolac
Vinylite or one kind in crystallinity vinyltoluene polyester resin or at least two combination.
4. a kind of BMC, it is characterised in that the raw material components of the BMC include any one of claim 1-3
Described complex thickener.
5. BMC according to claim 4, it is characterised in that the BMC presses weight/mass percentage composition
Meter, including the following raw material component：
6. BMC according to claim 5, it is characterised in that described matrix resin is selected under normal temperature as liquid
Unsaturated polyester resin, epoxy resin, vinylite or phenolic resin.
7. the BMC according to claim 5 or 6, it is characterised in that the shrinking agent is selected from polymethyl
One kind or at least two combination in sour methyl esters, polystyrene, polyvinyl acetate or saturated polyester；
Preferably, the enhancing material is glass fibre；
Preferably, the length of the glass fibre is 5-20mm；
Preferably, the combination of the one kind or at least two of the initiator in TBPB, TBPO, AIBN or BPO.
8. the preparation method of the BMC according to claim any one of 5-7, it is characterised in that the preparation method
Comprise the following steps：
(1) first the matrix resin, initiator and shrinking agent of formula ratio are mixed, obtains the first mixed material；
(2) the physics thickener of formula ratio is mixed with first mixed material, obtains the second mixed material；
(3) chemical thickening agent of formula ratio is mixed with second mixed material, obtains the 3rd mixed material；
(4) glass fibre of formula ratio is mixed with the 3rd mixed material, obtains the BMC.
9. preparation method according to claim 8, it is characterised in that the mixing described in step (1)-step (4) be
Carried out in kneader；
Preferably, the time mixed described in step (1) is 0.5-1 hours；
Preferably, the time mixed described in step (2) is 0.2-0.5 hours；
Preferably, the time mixed described in step (3) is 0.3-0.6 hours；
Preferably, the time mixed described in step (4) is 0.5-1 hours.
10. preparation method according to claim 8 or claim 9, it is characterised in that the preparation method comprises the following steps：
(1) first the matrix resin, initiator and shrinking agent of formula ratio are added in kneader, mediated 0.5-1 hours, obtain the
One mixed material；
(2) by the physics thickener of formula ratio together with first mixed material in kneader mediate 0.2-0.5 hours, obtain
To the second mixed material；
(3) by the chemical thickening agent of formula ratio together with second mixed material in kneader mediate 0.3-0.6 hours, obtain
To the 3rd mixed material；
(4) by the glass fibre of formula ratio together with the 3rd mixed material in kneader mediate 0.5-1 hours, obtain institute
State BMC.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710468815.6A CN107189391B (en) | 2017-06-20 | 2017-06-20 | Composite thickening agent, bulk molding compound and preparation method of bulk molding compound |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111378264A (en) * | 2018-12-29 | 2020-07-07 | 浙江律通复合材料有限公司 | BMC material for explosion-proof electrical appliance |
| CN113549178A (en) * | 2021-07-14 | 2021-10-26 | 江苏华昇新材料科技有限公司 | High-strength BMC bulk molding compound prepared from PMMA powder and MMA monomer and preparation method thereof |
-
2017
- 2017-06-20 CN CN201710468815.6A patent/CN107189391B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111378264A (en) * | 2018-12-29 | 2020-07-07 | 浙江律通复合材料有限公司 | BMC material for explosion-proof electrical appliance |
| CN113549178A (en) * | 2021-07-14 | 2021-10-26 | 江苏华昇新材料科技有限公司 | High-strength BMC bulk molding compound prepared from PMMA powder and MMA monomer and preparation method thereof |
| CN113549178B (en) * | 2021-07-14 | 2022-08-05 | 江苏华昇新材料科技有限公司 | High-strength BMC bulk molding compound prepared from PMMA powder and MMA monomer and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107189391B (en) | 2020-03-31 |
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