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High-vapor-barrier polyurethane coating for refrigeration house and preparation method of high-vapor-barrier polyurethane coating

A polyurethane coating, water vapor barrier technology, applied in the field of coatings, to achieve the effects of stable performance, high tensile strength and short process

Active Publication Date: 2018-04-13
烟台市顺达聚氨酯有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There is no water vapor transmission rate of 7.5*10 -9 g / m 2 ·S Pa (0.1perm grade) and above coating reports

Method used

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  • High-vapor-barrier polyurethane coating for refrigeration house and preparation method of high-vapor-barrier polyurethane coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Pump 220 parts of polyether polyol into the reaction kettle, heat up to 100-110 ° C, dehydrate at a vacuum degree above -0.08MPa for 40 minutes, cool to 60 ° C, add 280 parts of isocyanate, then heat up to 80 ° C, 80 The reaction was carried out for 4 hours under the condition of ℃, and then cooled to below 60 ℃ to obtain component A.

[0033] 300 parts of polyether polyol, 280 parts of fluorine-containing acrylic resin, 200 parts of talc powder, 100 parts of mica powder, 130 parts of barium sulfate, 50 parts of iron red, 100 parts of zinc phosphate, 10 parts of BYK163 dispersant, 5 parts of BYK104 dispersant parts, 5 parts of BYK051 defoamer and 10 parts of bentonite were mixed and dispersed for 1 hour, put into the reaction kettle, heated to 100-110 ℃, added 55 parts of chain extender diol and 5 parts of diamine, stirred for 30min, and in- Dehydration in a vacuum of more than 0.08MPa for 2 hours, then cooled to below 60°C, slowly adding 3 parts of catalyst alicyclic a...

Embodiment 2

[0036] Pump 240 parts of polyether polyol into the reaction kettle, heat up to 100-110 ° C, dehydrate at a vacuum degree above -0.08MPa for 40 minutes, cool to 60 ° C, add 260 parts of isocyanate, then heat up to 80 ° C, 80 The reaction was carried out for 4 hours under the condition of ℃, and then cooled to below 60 ℃ to obtain component A.

[0037] 260 parts of polyether polyol, 300 parts of fluorine-containing acrylic resin, 200 parts of talc, 100 parts of glass flakes, 150 parts of barium sulfate, 20 parts of carbon black, 50 parts of zinc phosphate, 80 parts of aluminum phosphate, and 15 parts of BYK110 dispersant , 5 parts of BYK070 defoamer and 10 parts of bentonite were mixed and dispersed for 1 hour, put into the reaction kettle, heated to 100-110 ℃, added 70 parts of chain extender diol and 10 parts of diamine, stirred for 30min, and at -0.08 The vacuum degree above MPa was dehydrated for 2 hours, then cooled to below 60°C, slowly adding 0.5 part of catalyst stannous...

Embodiment 3

[0040]Pump 270 parts of polyether polyol into the reaction kettle, heat up to 100-110 ° C, dehydrate at a vacuum degree above -0.08MPa for 40 minutes, cool to 60 ° C, add 230 parts of isocyanate, then heat up to 80 ° C, 80 The reaction was carried out for 4 hours under the condition of ℃, and then cooled to below 60 ℃ to obtain component A.

[0041] 290 parts of polyether polyol, 240 parts of fluorine-containing acrylic resin, 90 parts of silicon micropowder, 130 parts of talc powder, 50 parts of mica powder, 50 parts of glass flakes, 100 parts of barium sulfate, 5 parts of carbon black, 50 parts of iron red, phosphoric acid 120 parts of aluminum, 10 parts of BYK161 dispersant, 5 parts of BYK104 dispersant, 5 parts of BYK060N defoamer and 8 parts of white carbon black were mixed and dispersed, and then ground for 1 hour, put into the reaction kettle, heated to 100-110 ℃, and added chain extender II 90 parts of alcohol and 10 parts of diamine were stirred for 30min, dehydrated ...

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Abstract

The invention discloses a high-vapor-barrier polyurethane coating for a refrigeration house and a preparation method of the high-vapor-barrier polyurethane coating. The high-vapor-barrier polyurethanecoating comprises a component A and a component B, the mixing ratio of the weight of the component A to the weight of the component B is 1:2.5, the component A comprises isocyanate and polyether glycol, and the component B comprises a fluoro acrylic resin, polyether glycol, a chain extender, a catalyst, a pigment, a filler, a dispersing agent, a defoamer and an anti-setting agent. The prepared polyurethane coating can be applied to the field of dampproofness and vapor barriering of a polyurethane external thermal insulation system, when the test shows that the thickness of a coating film is more than 1 mm, the moisture-vapor transmission rate is 7.5*10<-9> g / m<2>.S.Pa, the high-vapor-barrier polyurethane coating has an excellent binding force with a polyurethane foam and concrete, and thebonding strength is higher than 1 MPa.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a high water vapor barrier polyurethane coating for cold storage and a preparation method thereof. Background technique [0002] At present, due to the advantages of low thermal conductivity, good processing performance, high temperature resistance, strong deformation resistance and high comprehensive cost performance, rigid polyurethane foam is widely used in cold storage insulation and building exterior wall insulation systems. Although the rigid polyurethane foam has a stable void structure and a closed cell rate of more than 90%, in high humidity areas, especially in southern China, the entry of water vapor will greatly affect the thermal insulation of polyurethane foam, and water vapor will also Accelerate the aging of polyurethane materials, thereby affecting the service life of the entire insulation system, and causing a substantial increase in energy consumption. Theref...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/61C08G18/66C08G18/48C08G18/32C08G18/10
CPCC08G18/10C08G18/4825C08G18/4829C08K3/04C08K3/34C08K3/40C08K2003/3045C08K2003/321C08K2201/014C09D175/14C08G18/48C08G18/3203C08G18/3225C08G18/6674C08G18/6685
Inventor 吴国成李忠贵叶刘亮
Owner 烟台市顺达聚氨酯有限责任公司
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