CN103756332B - A kind of Addition-type mold rubber and preparation method thereof - Google Patents
A kind of Addition-type mold rubber and preparation method thereof Download PDFInfo
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- CN103756332B CN103756332B CN201310738428.1A CN201310738428A CN103756332B CN 103756332 B CN103756332 B CN 103756332B CN 201310738428 A CN201310738428 A CN 201310738428A CN 103756332 B CN103756332 B CN 103756332B
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Abstract
Open a kind of Addition-type mold rubber of the present invention and preparation method thereof, the composition of raw materials of this Addition-type mold rubber is counted by weight, is made up of 70～85 parts of component A, 5～10 parts of component B, 0.2～2.0 part of catalyst, 1,3～7 parts of white carbons of 0.1～1.5 part of inhibitor and 20～25 parts of inhibitor 2.The Addition-type mold rubber of the present invention, its hot strength, tearing strength and hardness are excellent, be highly suitable for making crystal drilling, and overmolded number of times is up to 35～45 times, and service life is long, and the crystal drilling brightness of making is also greatly improved.
Description
Technical field
The present invention relates to Addition-type mold rubber technical field, particularly relate to the Addition-type mold rubber that can be used for making crystal drilling
Technical field.
Background technology
It is good that Addition-type mold rubber has transparency, easy deep cure, and the feature that shrinkage factor is little is mainly used in precision die
Production with exquisite copy.
At present, the mold glue that crystal drilling is conventional is add-on type mould silica gel, because add-on type mould silica gel has the transparency
The advantages such as high, release property is good, it can be seen that whether be cast in material in mould has defects such as bubble, and with condensed type mold glue phase
Ratio, Addition-type mold rubber dimensional stability is more preferable, and linear shrinkage ratio is less than 0.1%, heat-resisting up to more than 250 DEG C, in sealed environment
Middle heating is not reduced.
But, the present inventor finds under study for action, the existing Addition-type mold rubber for making crystal drilling, and it uses the longevity
Ordering short, because at high temperature, mold glue can react with product (such as epoxy resin etc.), therefore have impact on the use of mold glue
In the life-span, the overmolded number of times of existing mold glue is caused to only have about 20 times；Additionally, use crystal prepared by existing Addition-type mold rubber
Bore its brightness also ratio relatively low.
The market of crystal drilling is very wide, and therefore, researching and developing novel making crystal drilling mold glue, especially research and development can carry
High crystal drilling brightness, and the mold glue of length in self has the highest economic worth in service life.
Summary of the invention
Present invention aim at for the deficiencies in the prior art, it is provided that a kind of add-on type mould that can be used for making crystal drilling
Glue, this Addition-type mold rubber tensile property is good, hardness is high, tear resistance good, and can be greatly prolonged mold glue service life, uses
The crystal drilling brightness that this Addition-type mold rubber manufactures is the highest.
It is a further object to provide the preparation method of above-mentioned Addition-type mold rubber.
The above-mentioned purpose of the present invention is achieved by following scheme:
A kind of Addition-type mold rubber, its composition of raw materials is made up of each component of following parts by weight:
Above-mentioned component A is the base material in composition of raw materials of the present invention, and its structural formula is as shown in logical formula I:
In above-mentioned formula I, a=90～98；
Above-mentioned component B plays the effect of cross-linking agent in composition of raw materials of the present invention, and the present inventor is found by research, for
The structure of component A of the present invention and performance characteristics, cross-linking agent uses containing hydrogen silicone oil cross-linking agent can play best experiment effect；Group
The structural formula of part B is as shown in logical formula II:
In above-mentioned formula II, b=5～10, c=12～15.
Above-mentioned catalyst uses any commercially available platinum catalyst all can realize the present invention；Preferably Karst platinum is urged
Agent [chemical name is platinum (O) divinyl tetramethyl disiloxane solution], platinum content is 3000pmm；Because the present invention
People finds after classification experiment by carrying out multiple platinum catalyst, and the activity of Karst platinum catalyst is the highest, and with this
Bright component A and the compatibility of component B are best.
Component A, component B and catalyst in inventive formulation will occur curing reaction in mixed process, cause
Finished product is difficult to obtain required shape and character, and solidifies uneven, therefore, before solidification temperature is not up to, it is necessary to logical
Cross addition inhibitor to the generation suppressing cured at room temperature to react, in above-mentioned formula, inhibitor 1 plays this inhibitory action exactly
, inhibitor 1 can generate the complexation body of certain forms with platinum catalyst thus realize inhibitory action；The present inventor is for this
The feature of invention formula, is optimized various selectable inhibitor, and final inhibitor 1 selects to use alkynol class inhibitor,
Because alkynol class inhibitor is the inhibitor of a class volatile, under the solidification temperature of the present invention, it is possible to vapor away well,
Thus curing reaction is carried out, and product final performance will not be impacted by inhibitor itself；Inhibitor 1 of the present invention uses commercially available
Any alkynol class inhibitor all can realize the present invention, preferably 3,5-dimethyl-1-hexin-3-alcohol or 2-propine-1-alcohol.
In above-mentioned raw materials formula, white carbon primarily serves the effect of reinforcement, uses commercially available white carbon can realize this
Bright.
For the problem that existing crystal drilling mold glue service life is short, the present inventor is found by research, mainly because of
Can react with product (such as epoxy resin etc.) for mold glue, thus have impact on the service life of mold glue, therefore, the present invention
People considers to suppress colloid to react with product (such as epoxy resin etc.) surface by a kind of inhibitor of interpolation, thus realizes mold glue
The prolongation in service life；In order to the prolongation in mold glue service life can be realized, do not interfere with again the final performance of mold glue, send out
After a person of good sense is by research, obtaining a kind of inhibitor, the namely inhibitor 2 in inventive formulation, this inhibitor 2 has been not only able to
Effect realizes the prolongation of die life, and it can make the overmolded number of times of mold glue reach 35～45 times, and not interfere with mould
The final performance of tool glue, the structural formula of this inhibitor 2 is as shown in logical formula III:
In above-mentioned formula III, d=10～15.
Above-mentioned inhibitor 2 is because substituent group contains phenyl, so not only the compatibility to component A and component B is good, and Er Qieke
To improve heat-resisting quantity and the heat stability of whole colloid, can effectively suppress colloid anti-with product (such as epoxy resin etc.) surface
Should.
The present invention also provides for the preparation method of above-mentioned Addition-type mold rubber, and this preparation method comprises the steps:
According to above-mentioned formula, by equal for first to component A, component B, catalyst, inhibitor 1, white carbon and inhibitor 2 mix and blend
Even, then water after vacuumizing and defoaming, at 120 DEG C, first solidify 20min, then at 80 DEG C, solidify 15min, then prepare required
Addition-type mold rubber.
In above-mentioned preparation method, the vacuum that vacuumizing and defoaming uses is-0.095Mpa.
The Addition-type mold rubber of the present invention, its hot strength, tearing toughness and hardness are all highly suitable for preparing water
Brilliant production template of boring, and the crystal drilling production template prepared with Addition-type mold rubber composite of the present invention, its overmolded
Number of times is up to 35～45 times, and service life is long, and the crystal drilling brightness made is the highest.
Compared with prior art, the present invention has a following beneficial aspects:
1. the Addition-type mold rubber of the present invention, in its formula, the selection of each component and the optimization of consumption thereof, all ensure that product
The hot strength of product, tearing strength and hardness are all highly suitable for making crystal drilling；
2. the Addition-type mold rubber of the present invention, it is by the interpolation of inhibitor 2, efficiently avoid colloid and product (as
Epoxy resin etc.) surface reaction, thus ensure that the overmolded number of times of gained mold glue is up to 35～45 times, service life is long,
And do not interfere with the hot strength of colloid, tearing toughness and hardness；
3. the Addition-type mold rubber of the present invention, its crystal drilling brightness made also is greatly improved；
4. the Addition-type mold rubber of the present invention, its preparation method, according to the feature of each component in formula, uses two steps especially
Solidification method, compared with for the step curing operation that prior art is conventional, the physical property of its product is more excellent；
Preparation method the most of the present invention is simple, with low cost, have the highest economic worth.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further described through, but the present invention is not appointed by specific embodiment
What limits.
Embodiment 1
A kind of Addition-type mold rubber of the present embodiment, its composition of raw materials is made up of each component of following parts by weight:
The structural formula of above-mentioned component A is as shown in logical formula I:
In above-mentioned formula I, a=90；
The structural formula of above-mentioned component B is as shown in logical formula II:
In above-mentioned formula II, b=10, c=12.
Above-mentioned catalyst is Karst platinum catalyst, and platinum content is 3000pmm；White carbon is commercially available white carbon, presses down
Preparation 1 is 3,5-dimethyl-1-hexin-3-alcohol.
The structural formula of above-mentioned inhibitor 2 is as shown in logical formula III:
In above-mentioned formula III, d=12.
The preparation method of above-mentioned Addition-type mold rubber comprises the steps:
According to above-mentioned formula, by equal for first to component A, component B, catalyst, inhibitor 1, white carbon and inhibitor 2 mix and blend
Even, then water after evacuation (vacuum is-0.095Mpa) deaeration, at 120 DEG C, first solidify 20min, then solidify at 80 DEG C
15min, then prepare the Addition-type mold rubber of the present embodiment.
Embodiment 2
A kind of Addition-type mold rubber of the present embodiment, its composition of raw materials is made up of each component of following parts by weight:
The structural formula of above-mentioned component A is as shown in logical formula I:
In above-mentioned formula I, a=98；
The structural formula of above-mentioned component B is as shown in logical formula II:
In above-mentioned formula II, b=5, c=14.
Above-mentioned catalyst is Karst platinum catalyst, and platinum content is 3000pmm；White carbon is commercially available white carbon, presses down
Preparation 1 is 2-propine-1-alcohol.
The structural formula of above-mentioned inhibitor 2 is as shown in logical formula III:
In above-mentioned formula III, d=10.
The preparation method of above-mentioned Addition-type mold rubber comprises the steps:
According to above-mentioned formula, by equal for first to component A, component B, catalyst, inhibitor 1, white carbon and inhibitor 2 mix and blend
Even, then water after evacuation (vacuum is-0.095Mpa) deaeration, at 120 DEG C, first solidify 20min, then solidify at 80 DEG C
15min, then prepare the Addition-type mold rubber of this enforcement.
Embodiment 3
A kind of Addition-type mold rubber of the present embodiment, its composition of raw materials is made up of each component of following parts by weight:
The structural formula of above-mentioned component A is as shown in logical formula I:
In above-mentioned formula I, a=95；
The structural formula of above-mentioned component B is as shown in logical formula II:
In above-mentioned formula II, b=13, c=15.
Above-mentioned catalyst is Karst platinum catalyst, and platinum content is 3000pmm；White carbon is commercially available white carbon, presses down
Preparation 1 is 3,5-dimethyl-1-hexin-3-alcohol.
The structural formula of above-mentioned inhibitor 2 is as shown in logical formula III:
In above-mentioned formula III, d=15.
The preparation method of above-mentioned Addition-type mold rubber comprises the steps:
According to above-mentioned formula, by equal for first to component A, component B, catalyst, inhibitor 1, white carbon and inhibitor 2 mix and blend
Even, then water after evacuation (vacuum is-0.095Mpa) deaeration；At 120 DEG C, first solidify 20min, then solidify at 80 DEG C
15min, then prepare the Addition-type mold rubber of the present embodiment.
Comparative example 4
A kind of Addition-type mold rubber of the present embodiment, its composition of raw materials is made up of each component of following parts by weight:
The structural formula of above-mentioned component A is as shown in logical formula I:
In above-mentioned formula I, a=95；
The structural formula of above-mentioned component B is as shown in logical formula II:
In above-mentioned formula II, b=13, c=15.
Above-mentioned catalyst is Karst platinum catalyst, and platinum content is 3000pmm；White carbon is commercially available white carbon, presses down
Preparation 1 is 3,5-dimethyl-1-hexin-3-alcohol.
The preparation method of above-mentioned Addition-type mold rubber comprises the steps:
According to above-mentioned formula, by component A, component B, catalyst, inhibitor 1 and white carbon elder generation mixing and stirring, then take out
Water after vacuum (vacuum is-0.095Mpa) deaeration, at 120 DEG C, first solidify 20min, then at 80 DEG C, solidify 15min, then
Prepare the Addition-type mold rubber of the present embodiment.
Comparative example 5
A kind of Addition-type mold rubber of the present embodiment, its composition of raw materials is made up of each component of following parts by weight:
The structural formula of above-mentioned component A is as shown in logical formula I:
In above-mentioned formula I, a=95；
The structural formula of above-mentioned component B is as shown in logical formula II:
In above-mentioned formula II, b=13, c=15.
Above-mentioned catalyst is Karst platinum catalyst, and platinum content is 3000pmm；White carbon is commercially available white carbon, presses down
Preparation 1 is 3,5-dimethyl-1-hexin-3-alcohol.
The structural formula of above-mentioned inhibitor 2 is as shown in logical formula III:
In above-mentioned formula III, d=15.
The preparation method of above-mentioned Addition-type mold rubber comprises the steps:
According to above-mentioned formula, by equal for first to component A, component B, catalyst, inhibitor 1, white carbon and inhibitor 2 mix and blend
Even, then water after evacuation (vacuum is-0.095Mpa) deaeration, at 120 DEG C, solidify 30min, then prepare this enforcement
The Addition-type mold rubber of example.
Embodiment 6 performance test
Addition-type mold rubber prepared by embodiment 1, embodiment 2, embodiment 3, comparative example 4 and comparative example 5
Carrying out performance test, hot strength presses GB/T528-1998 test, and tearing strength presses GB/T528-1999 test, and hardness presses GB/
T531-1999 tests, and test result is as shown in table 1.
Table 1 the performance test results
| Performance test project | Embodiment 1 | Embodiment 2 | Embodiment 3 | Comparative example 4 | Comparative example 5 |
| Hardness (shore A) | 42 | 43 | 40 | 40 | 40 |
| Hot strength (MPa) | 4.6 | 4.6 | 4.5 | 4.4 | 4.0 |
| Tearing strength (kN/m) | 26 | 27 | 25 | 25 | 20 |
| Overmolded number of times (secondary) | 33 | 34 | 35 | 20 | 30 |
As it can be seen from table 1 embodiment 1, embodiment 2 and the Addition-type mold rubber of embodiment 3, its tensile property, hardness
All good with tearing strength, it is highly suitable for making crystal drilling.
Comparative example 4 and the comparative example of comparative example 5 mainly embodiment 3, the raw material of comparative example 4 is joined
Not having inhibitor 2 in side, remaining is identical with comparative example 3, and the preparation method of comparative example 5 uses a step solidification method, its
Remaining same as in Example 3；From the data of table 1 it can be seen that compared with embodiment 3 and comparative example 5, comparative example's 4
Overmolded number of times significantly reduces, and the life-span is comparatively short；And compared with embodiment 3 and comparative example 4, the draftability of comparative example 5
Energy, hardness and tearing strength are the most poor.
In sum, the Addition-type mold rubber of the present invention, not only tensile property is good, tearing strength is high, hardness is high, the suitableeest
Share in making crystal drilling, and its overmolded number of times is high, service life is long.
Claims (3)
1. an Addition-type mold rubber, it is characterized in that the composition of raw materials of this Addition-type mold rubber is by following parts by weight
Each component composition:
The structural formula of above-mentioned component A is as shown in logical formula I:
In above-mentioned formula I, a=90～98；
The structural formula of above-mentioned component B is as shown in logical formula II:
In above-mentioned formula II, b=5～10, c=12～15；
Above-mentioned catalyst is Karst platinum catalyst, and platinum content is 3000pmm；
Above-mentioned inhibitor 1 is 3,5-dimethyl-1-hexin-3-alcohol or 2-propine-1-alcohol；
The structural formula of above-mentioned inhibitor 2 is as shown in logical formula III:
In above-mentioned formula III, d=10～15.
2. the preparation method of Addition-type mold rubber described in a claim 1, it is characterised in that this preparation method includes walking as follows
Rapid:
After first to component A, component B, catalyst, inhibitor 1, white carbon and inhibitor 2 mixing and stirring, then vacuumizing and defoaming
Pouring, first solidifies 20min at 120 DEG C, then solidifies 15min at 80 DEG C, then prepare required Addition-type mold rubber.
The preparation method of a kind of Addition-type mold rubber, it is characterised in that described vacuumizing and defoaming is adopted
Vacuum be-0.095Mpa.
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Families Citing this family (5)
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| CN106280487A (en) * | 2016-08-24 | 2017-01-04 | 江苏天辰新材料股份有限公司 | A kind of mold glue fluid silicone rubber and preparation method thereof |
| CN106854369A (en) * | 2016-12-30 | 2017-06-16 | 江西蓝星星火有机硅有限公司 | A kind of dual composition addition type mould silica gel of the high strength easy demoulding and preparation method thereof |
| CN106883615A (en) * | 2017-03-12 | 2017-06-23 | 汕头市科源有机硅材料有限公司 | A kind of preparation method of the high anti-tear organic silicon rubber of mould |
| CN108587126A (en) * | 2018-05-29 | 2018-09-28 | 滁州君越高分子新材料有限公司 | A kind of preparation method of alloy mold glue |
| CN115160796A (en) * | 2022-08-18 | 2022-10-11 | 广州福泽新材料有限公司 | Preparation process of high-performance addition type mold glue |
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| CN101735621A (en) * | 2009-12-07 | 2010-06-16 | 江苏天辰硅材料有限公司 | Anti-fatigue liquid silicon rubber and preparation method thereof |
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