CN109825240A - A kind of water-swellable modified polysulfide sealant and its preparation process - Google Patents
A kind of water-swellable modified polysulfide sealant and its preparation process Download PDFInfo
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- CN109825240A CN109825240A CN201910174112.1A CN201910174112A CN109825240A CN 109825240 A CN109825240 A CN 109825240A CN 201910174112 A CN201910174112 A CN 201910174112A CN 109825240 A CN109825240 A CN 109825240A
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Abstract
The invention belongs to sealant technical fields, a kind of polyurethane with water-swellable performance synthesized using Hydrophilicrto polyether polyalcohol with isocyanates will specifically be disclosed as skeleton, isocyanide root is changed into the sealant with polysulfide rubber curing mechanism after sulfydryl blocks.Hydrophilic polyether polyalcohol and chlorinated paraffin are added in reaction kettle after vacuum dehydration after isocyanates reaction is added, sulfydryl ethoxy ethanol is added and reacts to be water-swellable modified polysulfide rubber；Then by the A cream formed by stirrings such as the modified polysulfide rubber, plasticizer, chlorinated paraffin and coupling agents with the B cream formed by oxidant, plasticizer, promotor, chlorinated paraffin and filler mixed grinding with 10:0.8 --- 2.0 ratio, which mixes, can form sealant.The sealant has the characteristics that expansion factor is not easily runed off, can expand repeatedly and bonded with concrete structure secured.
Description
Technical field
The invention belongs to architectural engineering of cement waterproof technique field more particularly to a kind of water-swellable modified polysulfide sealants
And its preparation process.
Background technique
Water-swellable sealant is mainly used in following aspect: underground engineering concrete construction joint, reinforcing bar connect with concrete
Seam, post-cast strip waterproof；Highway, railway, the circumferential longitudinal direction of seabed tunnel and the waterproof of horizontal construction joint；Urban subway tunnel and ground
The waterproof of debarkation stop construction joint, connecting sewing.The sealing material (item) expanded used at present is mainly by rubber, bentonite, suction
For water-resin etc. at being grouped as, the water absorption factor due to constituting the sealing material (item) is mostly the addition types such as bentonite, is existed
Expansion multiplying power it is small and also be easy to run off, repeatedly expand after expansion character reduce defect；Another kind is based on the polyurethane that absorbs water
Want component constitute water-swellable material, the expansion water-stop material although its expansion factor not easily run off, performance it is relatively stable,
It is a kind of product of one-component moisture-curable, bubble is also easy to produce in use, when bonding with cement concrete surface
It is also easy to produce bubble gap and leads to lose effectiveness in sealing, while there is also the defects of production technology complexity for the expansion water-stop material.
Summary of the invention
It is an object of the invention to provide a kind of water-swellable modified polysulfide sealants.Water-swellable modified polysulfide sealing
Glue is the polyurethane with water-swellable performance that is synthesized using Hydrophilicrto polyether polyalcohol with isocyanates as skeleton, isocyanide root
It is changed into the sealant with polysulfide rubber curing mechanism after sulfydryl blocks.
To achieve the above object, the technical scheme adopted by the invention is as follows:
A kind of water-swellable modified polysulfide sealant is that 10:0.8 --- 2.0 A cream and B cream forms by weight ratio；Wherein
The A cream includes the component of following parts by weight:
Water-swellable modified polysulfide rubber 26-30,
Plasticizer 10-20,
Inorganic filler 30-40,
Viscosity modifier 5-10 and
Coupling agent 0.1-0.3,
The B cream includes the component of following parts by weight:
Oxidant 20-30,
Plasticizer 25-30,
Carbon black or silica 5-10,
Promotor 2-3 and chlorinated paraffin 30-35 is constituted；Wherein
Hydrophilicrto polyether polyalcohol of the water-swellable modified polysulfide rubber by 2500-4000 parts by weight, 300-350 weight
Measure part isocyanates (TDI) or and 100-140 parts by weight isocyanates (MDI) compound composition compound isocyanates, 220-
The sulfydryl ethoxy ethanol of 300 parts by weight, the chlorinated paraffin of 1000-1300 parts by weight are constituted.
Constitute the additional technical feature of above-mentioned technical proposal further include:
--- the inorganic filler for constituting the A cream can be calcium carbonate, barium sulfate, diatomite, mica powder, silica or zinc barium
The combination of two or more components of the white or described calcium carbonate, barium sulfate, diatomite, mica powder, silica or lithopone；
--- constituting can also be including phenolic resin, epoxy resin or the Petropols of 2-3 parts by weight in the component of the A cream；
--- the filler for constituting the B cream can be carbon black, silica or calcium carbonate or the carbon black, silica or carbon
The combination of sour Calcium compounds；
--- the promotor for constituting the B cream can be diphenylguanidine, captax or sulphur；
A kind of preparation method of water-swellable modified polysulfide sealant, includes the following steps described in the claims
The first step, the preparation of water-swellable modified polysulfide rubber
Hydrophilic polyether polyalcohol and chlorinated paraffin are added in reaction kettle, in 105~110 DEG C of progress vacuum dehydrations, about 1.5~3
Hour, then cool to 80 DEG C, be added isocyanates (TDI) or and isocyanates (MDI) compound composition compound isocyanates
It is reacted 3~4 hours at 75~85 DEG C, sulfydryl ethoxy ethanol is added when detecting isocyano-content between 3-4%, identical
At a temperature of react 3~4 hours, detect isocyano-content less than 0.05% after i.e. gained be water-swellable modified polysulfide rubber；
Second step
The preparation of A cream
Planet is added in the modified polysulfide rubber of certainty ratio set by the claims, plasticizer, chlorinated paraffin and coupling agent etc.
It is stirred in blender 0.4-0.6 hour, filler is then added and is stirred for 0.5-0.8 hour, that is, forms A cream；
The preparation of B cream
The oxidant of certainty ratio set by the claims, plasticizer, promotor, chlorinated paraffin and filler are mixed, in three rollers
It is ground on grinder, that is, forms B cream.
In use, by A cream and B cream with 10:0.8 --- 2.0 ratio mixing.
A kind of water-swellable modified polysulfide sealant provided by the present invention has the advantage that compared with prior art
1, since the sealant is i.e. hydrophilic polyether polyalcohol and isocyanide using the polyurethane with water-swellable performance as continuous phase
The polyurethane with water-swellable performance of acid esters reaction synthesis is skeleton, and synthesis has polysulfide rubber solidification after sulfydryl blocks
The synthetic material of mechanism, due to the sealant be using the polyurethane with water-swellable performance as continuous phase, thus have expansion
The characteristics of factor is not easily runed off, can be expanded repeatedly；
2, the two-component modified polysulfide sealant that the sealant is formed using oxide as curing agent simultaneously, overcomes the poly- ammonia of one-component
Esters moisture-curable is also easy to produce the deficiency of bubble, has and bonds firm performance with concrete structure, namely stops with fabulous
Aqueous energy；
3, since the sealant is to be made of the bis- cream of AB, as long as the bis- cream of AB, which are mixed, can be used, therefore there is easy to use, storage
Deposit the feature of phase length；In addition its preparation process is relatively easy and price advantage is higher.
Specific embodiment
Below by specific embodiment to a kind of preparation of water-swellable modified polysulfide sealant provided by the present invention
It is further described with performance:
Embodiment 1
1, the preparation of modified water-swellable polysulfide rubber
The Hydrophilicrto polyether polyalcohol of 2600 parts by weight and the chlorinated paraffin of 1000 parts by weight are added in reaction kettle, are heated to
105 DEG C progress vacuum dehydration 180 minutes, then cool to 80 DEG C, the isocyanates (TDI) and 100 weight of 310 parts by weight be added
The isocyanates (MDI) of part was at 80 DEG C of temperature this lower reaction 150 minutes, until detection isocyano-content is between 3-4%
When, the sulfydryl ethoxy ethanol of 240 parts by weight is then added, reacts 180 minutes at the same temperature, detects isocyano-content
Less than 0.05% when, that is, end of reaction to get water-swellable modified polysulfide rubber.
2, constitute the preparation of two-component modified polysulfide sealant A cream
Weigh above-mentioned prepared 30 parts by weight of water-swellable modified polysulfide rubber, the dioctyl phthalate of 15 parts by weight is done
Plasticizer, 8 parts by weight chlorinated paraffin be the silane coupling agent KH-560 and 2.5 parts by weight of sticky regulator and 0.1 parts by weight
Phenolic resin be added planetary mixer in stir 0.4 hour, the nanometer calcium carbonate filler that 35 parts by weight are then added is stirred for
50 minutes, as A cream.
3, constitute the preparation of two-component modified polysulfide sealant B cream
By the manganese dioxide of 25 parts by weight, the dibutyl phthalate of 30 parts by weight, the diphenylguanidine of 2.0 parts by weight, 9.0 weights
The silica of part and the sticky regulator chlorinated paraffin mixing of 33 parts by weight are measured, is ground on three-roll grinder, as B cream；
In use, the solidification of i.e. sealant；A cream and B cream are mixed with the ratio of 10:1.It is formed by the skill of sealant
Art index is
1.38 g/cm3 of density；1.5 h of working life；2 h of surface drying time；
- 40 DEG C of flawlesses of low temperature flexibility
0.35 MPa of adhesion strength
Elongation 250%
Expansion multiplying power 310%.
Embodiment 2
1, the preparation of modified water-swellable polysulfide rubber
The Hydrophilicrto polyether polyalcohol of 2800 parts by weight and the chlorinated paraffin of 1200 parts by weight are added in reaction kettle, are heated to
118 DEG C progress vacuum dehydration 150 minutes, then cool to 82 DEG C, be added 320 parts by weight isocyanates (IPDI) and 120 parts
Isocyanates (MDI) was at 82 DEG C of temperature this lower reaction 180 minutes, when detection isocyano-content is between 3-4%, so
The sulfydryl ethoxy ethanol of 260 parts by weight is added afterwards, reacts 220 minutes at the same temperature, detection isocyano-content is less than
When 0.05%, that is, end of reaction is to get water-swellable modified polysulfide rubber.
2, constitute the preparation of two-component modified polysulfide sealant A cream
Weigh above-mentioned prepared 26 parts by weight of water-swellable modified polysulfide rubber, the dioctyl phthalate of 18 parts by weight is done
Plasticizer, 6 parts by weight chlorinated paraffin do the petroleum of sticky regulator, the coupling agent KH-590 of 0.2 parts by weight and 2.1 parts by weight
Resin is added in planetary mixer and stirs 0.8 hour, and the barium sulfate filler that 37 parts by weight are then added is stirred for 40 minutes, as
A cream.
3, constitute the preparation of two-component modified polysulfide sealant B cream
By the zinc peroxide of 28 parts by weight, the dioctyl phthalate of 28 parts by weight, the diphenylguanidine of 2.8 parts by weight, 8.0 weights
The carbon black of part and the sticky regulator chlorinated paraffin mixing of 35 parts by weight are measured, is ground on three-roll grinder, as B cream.
In use, the solidification of i.e. sealant；A cream and B cream are mixed with the ratio of 10:2.It is formed by sealant
Technical indicator be
1.42 g/cm3 of density；1.5 h of working life；1.5 h of surface drying time；
- 40 DEG C of flawlesses of low temperature flexibility
0.35 MPa of adhesion strength
Elongation 220%
Expansion multiplying power 270%.
Embodiment 3
1, the preparation of modified water-swellable polysulfide rubber
The Hydrophilicrto polyether polyalcohol of 3700 parts by weight and the chlorinated paraffin of 1250 parts by weight are added in reaction kettle, are heated to
110 DEG C progress vacuum dehydration 90 minutes, then cool to 85 DEG C, the isocyanates (TDI) and 100 weight of 350 parts by weight be added
The isocyanates (MDI) of part was at 85 DEG C of temperature this lower reaction 240 minutes, until detection isocyano-content is between 3-4%
When, the sulfydryl ethoxy ethanol of 235 parts by weight is then added, reacts 180 minutes at the same temperature, detects isocyano-content
Less than 0.05% when, that is, end of reaction to get water-swellable modified polysulfide rubber.
2, constitute the preparation of two-component modified polysulfide sealant A cream
Weigh above-mentioned prepared 28 parts by weight of water-swellable modified polysulfide rubber, the dibutyl phthalate of 14 parts by weight is done
Plasticizer, 5 parts by weight chlorinated paraffin do sticky regulator, the silane coupling agent KH-470 of 0.3 parts by weight and 2.8 parts by weight
Epoxy resin is added in planetary mixer and stirs 0.6 hour, and the nano silica filler that 32 parts by weight are then added is stirred for
30 minutes, as A cream.
3, constitute the preparation of two-component modified polysulfide sealant B cream
By the calper calcium peroxide of 24 parts by weight, the dibutyl phthalate of 25 parts by weight, the captax of 2.6 parts by weight, 6.0 weights
The silica of part and the sticky regulator chlorinated paraffin mixing of 34 parts by weight are measured, is ground on three-roll grinder, as B cream.
In use, the solidification of i.e. sealant；A cream and B cream are mixed with the ratio of 10:2.25.It is formed by close
The technical indicator of sealing is
1.39 g/cm3 of density；1.0 h of working life；1 h of surface drying time；
- 40 DEG C of flawlesses of low temperature flexibility
0.40 MPa of adhesion strength
Elongation 240%
Expansion multiplying power 285%.
Embodiment 4
1, the preparation of modified water-swellable polysulfide rubber
The Hydrophilicrto polyether polyalcohol of 2700 parts by weight and the chlorinated paraffin of 1050 parts by weight are added in reaction kettle, are heated to
110 DEG C progress vacuum dehydration 120 minutes, then cool to 75 DEG C, the isocyanates (TDI) and 110 weight of 345 parts by weight be added
The isocyanates (MDI) of part was at 75 DEG C of temperature this lower reaction 220 minutes, until detection isocyano-content is between 3-4%
When, the sulfydryl ethoxy ethanol of 275 parts by weight is then added, reacts 240 minutes at the same temperature, detects isocyano-content
Less than 0.05% when, that is, end of reaction to get water-swellable modified polysulfide rubber.
2, constitute the preparation of two-component modified polysulfide sealant A cream
Weigh above-mentioned prepared 29 parts by weight of water-swellable modified polysulfide rubber, the dibutyl phthalate of 19 parts by weight is done
Plasticizer, 9 parts by weight chlorinated paraffin do sticky regulator, the silane coupling agent KH-470 of 0.15 parts by weight and 2.2 parts by weight
Epoxy resin be added planetary mixer in stir 0.5 hour, the nano mica powder filler that 30 parts by weight are then added is stirred for
42 minutes, as A cream.
3, constitute the preparation of two-component modified polysulfide sealant B cream
By the manganese dioxide of 22 parts by weight, the dioctyl phthalate of 26 parts by weight, the sulphur of 2.7 parts by weight, 5.0 parts by weight
Carbon black and 33 parts by weight sticky regulator chlorinated paraffin mixing, ground on three-roll grinder, as B cream.
In use, the solidification of i.e. sealant；A cream and B cream are mixed with the ratio of 10:1.It is formed by sealant
Technical indicator be
1.37 g/cm3 of density；2 h of working life；2.5 h of surface drying time；
- 40 DEG C of flawlesses of low temperature flexibility
0.42 MPa of adhesion strength
Elongation 230%
Expansion multiplying power 315%.
Embodiment 5
1, the preparation of modified water-swellable polysulfide rubber
The Hydrophilicrto polyether polyalcohol of 2900 parts by weight and the chlorinated paraffin of 1100 parts by weight are added in reaction kettle, are heated to
105 DEG C progress vacuum dehydration 150 minutes, then cool to 80 DEG C, the isocyanates (HMDI) and 105 weights of 330 parts by weight be added
The isocyanates (MDI) of part is measured at 80 DEG C of temperature this lower reaction 200 minutes, until detecting isocyano-content between 3-4%
When, the sulfydryl ethoxy ethanol of 250 parts by weight is then added, reacts 200 minutes at the same temperature, detects isocyano-content
Less than 0.05% when, that is, end of reaction to get water-swellable modified polysulfide rubber.
2, constitute the preparation of two-component modified polysulfide sealant A cream
Weigh above-mentioned prepared 27 parts by weight of water-swellable modified polysulfide rubber, the dioctyl phthalate of 13 parts by weight is done
Plasticizer, 7 parts by weight chlorinated paraffin do sticky regulator, the silane coupling agent KH-560 of 0.25 parts by weight and 2.0 parts by weight
Petropols be added planetary mixer in stir 0.6 hour, the nanometer calcium carbonate filler that 39 parts by weight are then added is stirred for
48 minutes, as A cream.
3, constitute the preparation of two-component modified polysulfide sealant B cream
By the brown lead oxide of 30 parts by weight, the dioctyl phthalate of 27 parts by weight, the diphenylguanidine of 2.2 parts by weight, 5.0 weights
The silica of part and the sticky regulator chlorinated paraffin mixing of 35 parts by weight are measured, is ground on three-roll grinder, as B cream.
In use, the solidification of i.e. sealant；A cream and B cream are mixed with the ratio of 10:0.8.It is formed by sealing
The technical indicator of glue is
Density 1.40g/cm3；Working life 2.5h；3 h of surface drying time；
- 40 DEG C of flawlesses of low temperature flexibility
0.39 MPa of adhesion strength
Elongation 230%
Expansion multiplying power 282%.
Embodiment 6
1, the preparation of modified water-swellable polysulfide rubber
The Hydrophilicrto polyether polyalcohol of 2650 parts by weight and the chlorinated paraffin of 1300 parts by weight are added in reaction kettle, are heated to
118 DEG C progress vacuum dehydration 120 minutes, then cool to 82 DEG C, the isocyanates (TDI) and 115 weight of 350 parts by weight be added
The isocyanates (MDI) of part was at 72 DEG C of temperature this lower reaction 180 minutes, until detection isocyano-content is between 3-4%
When, the sulfydryl ethoxy ethanol of 285 parts by weight is then added, reacts 220 minutes at the same temperature, detects isocyano-content
Less than 0.05% when, that is, end of reaction to get water-swellable modified polysulfide rubber.
2, constitute the preparation of two-component modified polysulfide sealant A cream
Weigh above-mentioned prepared 28 parts by weight of water-swellable modified polysulfide rubber, the dibutyl phthalate of 12 parts by weight is done
Plasticizer, 8 parts by weight chlorinated paraffin do sticky regulator, the silane coupling agent KH-590 of 0.20 parts by weight and 3.0 parts by weight
Phenolic resin be added planetary mixer in stir 0.4 hour, the uniform nanometer calcium carbonate and silicon of 40 parts by weight is then added
The filler of diatomaceous earth composition is stirred for 36 minutes, as A cream.
3, constitute the preparation of two-component modified polysulfide sealant B cream
By the manganese dioxide of 20 parts by weight, the dibutyl phthalate of 29 parts by weight, the captax of 3.0 parts by weight, 10.0 weights
The carbon black of part and the sticky regulator chlorinated paraffin mixing of 34 parts by weight are measured, is ground on three-roll grinder, as B cream.
In use, the solidification of i.e. sealant；A cream and B cream are mixed with the ratio of 10:1.It is formed by sealant
Technical indicator be
1.45 g/cm3 of density；2 h of working life；2.5 h of surface drying time；
- 40 DEG C of flawlesses of low temperature flexibility
0.37 MPa of adhesion strength
Elongation 260%
Expansion multiplying power 280%.
In above-mentioned specific embodiment, in the preparation process of A cream,
--- plasticizer can select dioctyl phthalate or dibutyl phthalate, for swollen to the chance water being added
Swollen modified polysulfide rubber must dissolve, while make sticky regulator by chlorinated paraffin, for being formed by " modified polysulfide sealant "
The adjustment of mobile performance, to meet the sealing for vertical gap or the sealing for transverse slot；It is used to vertically stitch
When sealing, viscosity should be higher, causes crack to prevent from being formed the sagging of the sealant in gap；And it is used for horizontal cross
To gap sealing when, stickiness should be lower, and sealant is enabled uniformly to fill gap；
--- it is used include phenolic resin, epoxy resin or Petropols can then cooperate coupling agent for increase formed
Sealant and concrete surface adhesive property；
--- the inorganic filler for constituting above-mentioned A cream can be calcium carbonate, barium sulfate, diatomite, mica powder, silica or zinc barium
The combination of two or more components of white or above-mentioned calcium carbonate, barium sulfate, diatomite, mica powder, silica or lithopone；
For cooperating plasticizer to realize the adjustment to A cream viscosity；
In above-mentioned specific embodiment, in the preparation process of B cream,
--- plasticizer can select dioctyl phthalate or dibutyl phthalate, for the oxidation to being added
Agent, filler are dispersed, and improve the uniformity mixed with A cream, while making sticky regulator by chlorinated paraffin, the shape for adjusting
At " modified polysulfide sealant " mobile performance adjustment, or for vertical gap sealing or for transverse slot only
Water；Used promotor is for adjusting A cream and the mixed curing rate of B cream.
--- the filler for constituting the B cream can be carbon black, silica or calcium carbonate or the carbon black, silica
Or the combination of calcium carbonate components, for adjusting the viscosity of B cream.
In the preparation process of the modification water-swellable polysulfide rubber of above-mentioned specific embodiment, used and hydrophily
Polyethers generates isocyanates used in the reaction of Hdyrophilic polyurethane, preferably isocyanates and isocyanates (MDI) compound structure
At compound isocyanates, to improve its reactivity；Isocyanates (TDI) or isocyanates can certainly be used alone
(MDI) it equally can be realized the reaction for generating Hdyrophilic polyurethane.
With Hydrophilicrto polyether, isocyanates TDI, isocyanates MDI and mercapto ethoxy ethanol synthesis have polyether skeleton and
The modified polysulfide rubber of polysulfide rubber curing mechanism is provided with the performance of water-swellable, can expand repeatedly, expansion factor does not flow
It loses, expands 98% or more conservation rate.
Claims (7)
1. a kind of water-swellable modified polysulfide sealant is that 10:0.8 --- 2.0 A cream and B cream forms by weight ratio；Wherein
The A cream includes the component of following parts by weight:
Water-swellable modified polysulfide rubber 26-30,
Plasticizer 10-20,
Inorganic filler 30-40,
Viscosity modifier 5-10,
Coupling agent 0.1-0.3,
The B cream includes the component of following parts by weight:
Oxidant 20-30,
Plasticizer 25-30,
Carbon black 5-10,
Promotor 2-3 and chlorinated paraffin 30-35 is constituted；Wherein
Hydrophilicrto polyether polyalcohol of the water-swellable modified polysulfide rubber by 2500-4000 parts by weight, 300-350 weight
Measure part isocyanates (TDI) or and 100-140 parts by weight isocyanates (MDI) compound composition compound isocyanates, 220-
The sulfydryl ethoxy ethanol of 300 parts by weight and the chlorinated paraffin of 1000-1300 parts by weight are constituted.
2. a kind of water-swellable modified polysulfide sealant as described in claim 1, it is characterised in that: constitute the nothing of the A cream
Machine filler is calcium carbonate, barium sulfate, diatomite, mica powder, silica or lithopone or the calcium carbonate, barium sulfate, diatom
The combination of two or more components of soil, mica powder, silica or lithopone.
3. a kind of water-swellable modified polysulfide sealant as described in claim 1, it is characterised in that: constitute the group of the A cream
It can also include phenolic resin, epoxy resin or the Petropols of 2-3 parts by weight in point.
4. a kind of water-swellable modified polysulfide sealant as described in claim 1, it is characterised in that: constitute filling out for the B cream
Material can be the combination of carbon black, silica or calcium carbonate or the carbon black, silica or calcium carbonate components.
5. a kind of water-swellable modified polysulfide sealant as described in claim 1, it is characterised in that: constitute the rush of the B cream
It can be diphenylguanidine, captax or sulphur into agent.
6. a kind of preparation method of water-swellable modified polysulfide sealant, includes the following steps described in the claims
The first step, the preparation of water-swellable modified polysulfide rubber
Hydrophilic polyether polyalcohol and chlorinated paraffin are added in reaction kettle, in 105~110 DEG C of progress vacuum dehydrations, about 1.5~3
Hour, 80 DEG C are then cooled to, isocyanates (TDI) or the compound isocyanates with isocyanates (MDI) compound composition is added
It is reacted 3~4 hours at 75~85 DEG C, sulfydryl ethoxy ethanol is added when detecting isocyano-content between 3-4%, identical
At a temperature of react 3~4 hours, detect isocyano-content less than 0.05% after i.e. gained be water-swellable modified polysulfide rubber；
Second step
The preparation of A cream
Planet is added in the modified polysulfide rubber of certainty ratio set by the claims, plasticizer, chlorinated paraffin and coupling agent etc.
It is stirred in blender 0.4-0.6 hour, filler is then added and is stirred for 0.5-0.8 hour, that is, forms A cream；
The preparation of B cream
The oxidant of certainty ratio set by the claims, plasticizer, promotor, chlorinated paraffin and filler are mixed, in three rollers
It is ground on grinder, that is, forms B cream.
7. in use, by the A cream and the B cream with 10:0.8 --- 2.0 ratio mixing.
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| CN111793213A (en) * | 2020-06-19 | 2020-10-20 | 安徽星鑫化工科技有限公司 | Modified chlorinated paraffin, preparation method thereof and application thereof in PVC (polyvinyl chloride) products |
| CN111944470A (en) * | 2020-08-20 | 2020-11-17 | 中电保力（北京）科技有限公司 | Bi-component water-absorbing expansion daub and application thereof |
| CN111944470B (en) * | 2020-08-20 | 2021-03-19 | 中电保力（北京）科技有限公司 | Bi-component water-absorbing expansion daub and application thereof |
| CN113136163A (en) * | 2021-05-10 | 2021-07-20 | 唐山华通特种线缆制造有限公司 | Room-temperature cross-linking self-leveling sealant for cable plug connector and preparation method thereof |
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