A kind of self-closing's polyurethane water-proof paint and preparation method thereof
Technical field
The invention belongs to water-repellent paint field, concretely relates to a kind of self-closing's polyurethane water-proof paint and its preparation
Method.
Background technology
Water-repellent paint is brushed or is sprayed in the substrate surface for needing to carry out water-proofing treatment, can meet industrial to build with civilian
The water leakage requirement at the positions such as roofing, basement, interior wall and the exterior wall built.With the development of building trade, all kinds of waterproofs
The development and application of coating are developed rapidly, and the quality and performance to building water-proof paint propose higher requirement.It is common
The problem of be that in the presence of acid rain or external force damage, outermost layer is damaged, and then interior exposed to outermost coating is built
The waterproof layer put is destroyed, and coating is reduced the protective capability of architecture noumenon;And after these situations occur, water-repellent paint by
It is self-closing in that can not realize, so cause it is increasingly severe, until that can not be continuing with.
The content of the invention
In order to solve the above technical problems, the present invention provides a kind of self-closing's polyurethane water-proof paint and preparation method thereof.With
The problem of improving existing water-repellent paint weatherability difference;The dereism of polyurethane water-proof paint is improved simultaneously, it is damaged by external force
After bad, 16-20h realizes that crack is impermeable.
To reach above-mentioned purpose, the technical solution used in the present invention is:
A kind of self-closing's polyurethane water-proof paint, it is made up of two kinds of components of A, B;Wherein, the component A is by following weight ratio
Raw material composition:Adipic acid 7-10 parts, HMDI 18-24 parts, the isocyanate group methyl caproate 18-20 parts of 2,6- bis-, stannous octoate
0.1-0.3 parts, PPG 40-55 parts, DBTL 0.1-0.3 parts;The B component by following weight than raw material form:
End hydroxy butadiene 10-25 parts, precipitated calcium carbonate 10-20 parts, bentonite 15-25 parts, white carbon 4-6 parts, curing agent 15-35
Part, organo-bismuth 0.1-0.5 parts, solvent naphtha 20-30 parts, defoamer 1-2 parts, chain extender 15-25 parts, chlorinated paraffin 40-55 parts.
Preferably, in an embodiment of the present invention, the mass ratio of two kinds of components of A, B is A components:B component=2:1-
3:1
Preferably, in an embodiment of the present invention, the curing agent is triethyl group triamine.
Preferably, in an embodiment of the present invention, the solvent naphtha is isoparaffin solvent oil.
Preferably, in an embodiment of the present invention, the organo-bismuth is in isooctyl acid bismuth, Yue Gui Jiao acid bismuths and bismuth neodecanoate
Any one.
Present invention also offers a kind of preparation method of self-closing's polyurethane water-proof paint, comprise the following steps:
(1)It is prepared by component A:
The adipic acid is added into reactor one, with 0.6-0.8m3/ h is passed through nitrogen, is warming up to 65-75 DEG C;To mixing
2, the 6- diisocyanate base methyl caproate and the HMDI are added in tank, with rotating speed 75-80 r/min, stirs 9-
11min, the liquid in the blending tank is slowly dropped in the reactor one;Described in being added into the reactor one
DBTL, the stannous octoate, 85-90 DEG C is warming up to, 70-80 r/min stirring reactions 1.5-2.5h;Nitrogen is closed, is added
The PPG, under the conditions of 110-120 DEG C, the .06MPa of -0 .05~-0, vacuum dehydration 1-2h;Cool to 55-65
DEG C, produce A components;
(2)It is prepared by B component
The end hydroxy butadiene is added in reactor two, is warming up to 90-110 DEG C, add the precipitated calcium carbonate,
The bentonite, the white carbon, disperse 10-20min, rotating speed 350-450r/min;The reactor two is cooled to 70-
80 DEG C, the curing agent, the organo-bismuth, the solvent naphtha, the defoamer, the chain extender, the chlorinated paraffin are added,
30-50min is stirred with 100-120r/min;At 110-120 DEG C, vacuum dehydration 0.5-1h, vacuum pressure is -0 .05~-0
.06MPa;55-65 DEG C is cooled to, produces B component;
(3)Prepare water-repellent paint:
The component A and the B components are mixed in proportion can form self-closing's polyurethane water-proof paint.
Beneficial effects of the present invention:Water-repellent paint weatherability provided by the present invention is strong;The addition of chain extender can enter one
Step expands the strand of formed B component, further to improve cohesive;Because the coating is using polyurethane as material of main part,
A certain proportion of plasticizer, inorganic filler are added, the coating has durable, corrosion resistant feature, when there is external force stress,
It can be deformed immediately, hence in so that it has the characteristics of stress is hardly damaged;After coating is by destroying, on long-chain molecule
Hydrogen bond can play crosslinked action, realize that self is closed, and can effectively solve the destroyed caused seepy question of polyurethane water-proof layer.
Technical scheme of the present invention is further described with reference to specific embodiment.
Embodiment 1:
A kind of self-closing's polyurethane water-proof paint, it is made up of two kinds of components of A, B;Wherein, component A by following weight than original
Material composition:7 parts of adipic acid, 18 parts of HMDI, 18 parts of 2,6-, bis- isocyanate group methyl caproates, 0.1 part of stannous octoate, polyether polyols
40 parts of alcohol, 0.1 part of DBTL;B component by following weight than raw material form:10 parts of end hydroxy butadiene, precipitated calcium carbonate
10 parts, 15 parts of bentonite, 4 parts of white carbon, 15 parts of curing agent, 0.1 part of organo-bismuth, 20 parts of solvent naphtha, 1 part of defoamer, chain extender
15 parts, 40 parts of chlorinated paraffin.
A, the mass ratio of two kinds of components of B is A components:B component=2:1..
Curing agent is triethyl group triamine.
Solvent naphtha is isoparaffin solvent oil.
Organo-bismuth is isooctyl acid bismuth.
The present embodiment additionally provides a kind of preparation method of self-closing's polyurethane water-proof paint, comprises the following steps:
(1)It is prepared by component A:
Adipic acid is added into reactor one, with 0.6m3/ h is passed through nitrogen, is warming up to 65 DEG C;2 are added into blending tank,
6- diisocyanate base methyl caproates and HMDI, with the r/min of rotating speed 75,9min is stirred, the liquid in blending tank is slowly dripped
It is added in reactor one;DBTL, stannous octoate are added into reactor one, is warming up to 85 DEG C, 70r/min stirring reactions 1.5h;
Nitrogen is closed, adds PPG, under the conditions of 110 DEG C, -0 .05MPa, vacuum dehydration 1h;55 DEG C are cooled to, is produced
A components;
(2)It is prepared by B component
End hydroxy butadiene is added in reactor two, is warming up to 90 DEG C, adds precipitated calcium carbonate, bentonite, hard charcoal
It is black, disperse 10min, rotating speed 350r/min;Reactor two is cooled to 70 DEG C, curing agent, organo-bismuth is added, solvent naphtha, disappears
Infusion, chain extender, chlorinated paraffin, 30min is stirred with 100r/min;At 110 DEG C, vacuum dehydration 0.5h, vacuum pressure is -0
.05MPa;55 DEG C are cooled to, produces B component;
(3)Prepare water-repellent paint:
Component A and B components are mixed in proportion can form self-closing's polyurethane water-proof paint.
Embodiment 2:
A kind of self-closing's polyurethane water-proof paint, it is made up of two kinds of components of A, B;Wherein, component A by following weight than original
Material composition:Adipic acid 7-10 parts, 24 parts of HMDI, 20 parts of 2,6-, bis- isocyanate group methyl caproates, stannous octoate 0.1-0.3
Part, 55 parts of PPG, 0.3 part of DBTL;B component by following weight than raw material form:25 parts of end hydroxy butadiene,
20 parts of precipitated calcium carbonate, 25 parts of bentonite, 6 parts of white carbon, curing agent 15-35 parts, 0.5 part of organo-bismuth, 30 parts of solvent naphtha, defoaming
2 parts of agent, 25 parts of chain extender, 55 parts of chlorinated paraffin.
A, the mass ratio of two kinds of components of B is A components:B component=3:1
Curing agent is triethyl group triamine.
Solvent naphtha is isoparaffin solvent oil.
Organo-bismuth is isooctyl acid bismuth.
The present embodiment additionally provides a kind of preparation method of self-closing's polyurethane water-proof paint, comprises the following steps:
(1)It is prepared by component A:
Adipic acid is added into reactor one, with 0.8m3/ h is passed through nitrogen, is warming up to 75 DEG C;2 are added into blending tank,
6- diisocyanate base methyl caproates and HMDI, with the r/min of rotating speed 80,11min is stirred, the liquid in blending tank is slowly dripped
It is added in reactor one;DBTL, stannous octoate are added into reactor one, is warming up to 90 DEG C, 80 r/min stirring reactions
2.5h;Nitrogen is closed, adds PPG, under the conditions of 120 DEG C, -0 .06MPa, vacuum dehydration 2h;65 DEG C are cooled to,
Produce A components;
(2)It is prepared by B component
End hydroxy butadiene is added in reactor two, is warming up to 110 DEG C, adds precipitated calcium carbonate, bentonite, hard charcoal
It is black, disperse 20min, rotating speed 450r/min;Reactor two is cooled to 80 DEG C, curing agent, organo-bismuth is added, solvent naphtha, disappears
Infusion, chain extender, chlorinated paraffin, 50min is stirred with 120r/min;At 120 DEG C, vacuum dehydration 1h, vacuum pressure is -0
.06MPa;65 DEG C are cooled to, produces B component;
(3)Prepare water-repellent paint:
Component A and B components are mixed in proportion can form self-closing's polyurethane water-proof paint.
Embodiment 3:
A kind of self-closing's polyurethane water-proof paint, it is made up of two kinds of components of A, B;Wherein, component A by following weight than original
Material composition:8.5 parts of adipic acid, 21 parts of HMDI, 19 parts of 2,6-, bis- isocyanate group methyl caproates, 0.2 part of stannous octoate, polyethers
47 parts of polyalcohol, 0.2 part of DBTL;B component by following weight than raw material form:17 parts of end hydroxy butadiene, lightweight carbon
Sour 15 parts of calcium, 20 parts of bentonite, 5 parts of white carbon, 25 parts of curing agent, 0.3 part of organo-bismuth, 25 parts of solvent naphtha, 1.5 parts of defoamer,
20 parts of chain extender, 47 parts of chlorinated paraffin.
A, the mass ratio of two kinds of components of B is A components:B component=2.5:1
Curing agent is triethyl group triamine.
Solvent naphtha is isoparaffin solvent oil.
Organo-bismuth is isooctyl acid bismuth.
The present embodiment additionally provides a kind of preparation method of self-closing's polyurethane water-proof paint, comprises the following steps:
(1) prepared by component A:
Adipic acid is added into reactor one, with 0.7m3/ h is passed through nitrogen, is warming up to 70 DEG C;2 are added into blending tank,
6- diisocyanate base methyl caproates and HMDI, with rotating speed 77r/min, 10min is stirred, the liquid in blending tank is slowly dripped
It is added in reactor one;DBTL, stannous octoate are added into reactor one, is warming up to 87 DEG C, 75 r/min stirring reactions 2h;
Nitrogen is closed, adds PPG, under the conditions of 115 DEG C, -0 .055MPa, vacuum dehydration 1.5h;60 DEG C are cooled to, i.e.,
Obtain A components;
(2) prepared by B component
End hydroxy butadiene is added in reactor two, is warming up to 100 DEG C, adds precipitated calcium carbonate, bentonite, hard charcoal
It is black, disperse 15min, rotating speed 400r/min;Reactor two is cooled to 75 DEG C, curing agent, organo-bismuth is added, solvent naphtha, disappears
Infusion, chain extender, chlorinated paraffin, 40min is stirred with 110r/min;At 115 DEG C, vacuum dehydration 0.7h, vacuum pressure is -0
.055MPa;60 DEG C are cooled to, produces B component;
(3) water-repellent paint is prepared:
Component A and B components are mixed in proportion can form self-closing's polyurethane water-proof paint.
The performance of water-repellent paint made from embodiment 1-3 is detected, to embodiment 1-4 water-repellent paint progressive
It can detect, testing result is as shown in table 1:
Table 1
As known from Table 1, water-repellent paint produced by the present invention has good water resistance and dereism.Found by contrasting
Water-repellent paint elongation percentage made from embodiment 3 is maximum, has a stronger external force resistance morphotropism, and dereism is more preferable.