In-situ spraying process of protective polyurethane plastic foam layer

A technology of polyurethane rigid foam composite material and foam plastic, which is applied in the direction of coating, device for coating liquid on the surface, pretreatment surface, etc. Low raw material consumption, the effect of reducing raw material consumption

Inactive Publication Date: 2006-10-18
JIANGSU NIGAO SCI & TECH +1
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: there is no guarantee that the protective layer and the surface of the substrate are firmly bonded and there are many joints; a variety of different forms of profiles are required; various plates and profiles are troublesome to transport and are easily damaged; the second method is to use polyurethane foam Plastic raw materials, on-site spraying construction on the surface of the substrate that needs to be protected, to form a protective layer of polyurethane foam
However, in winter and for substrates located in low-temperature environments, such as refrigeration facilities, cold storage, etc., due to the low ambient temperature at the construction site, it is impossible to ensure that the polyurethane foam raw materials are fully foamed. Plastic raw materials have low foaming rate and poor cohesiveness, can not play the role of heat preservation and waterproof, and there are many consumables and high construction costs
Therefore, when the ambient temperature is low, this construction method of on-site spraying cannot be used.
In this way, the application of polyurethane foam is limited to a large extent.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • In-situ spraying process of protective polyurethane plastic foam layer
  • In-situ spraying process of protective polyurethane plastic foam layer
  • In-situ spraying process of protective polyurethane plastic foam layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] At a construction site in Nantong City, Jiangsu Province, the on-site spraying construction process of the present invention is adopted, and the concrete beams and columns of the building are used as the substrate, and the polyurethane foam plastic raw material is sprayed on-site to form a polyurethane foam protective layer on the surface of these substrates. The substrate is insulated.

[0026] During construction, the polyurethane foam raw material used is a 1:1 mixture of flame-retardant polyurethane rigid foam combination material (component A) that meets the Q / 3204AGC008 standard, that is, white material and thick MDIPM200, that is, black material; the equipment for heating the above raw materials is Industrial electric furnace; the spraying equipment is FF-1600 high-pressure airless polyurethane sprayer; the equipment for heating the coating layer or the subsequent coating layer is a liquefied gas blowtorch.

[0027] During construction, the ambient temperature is -...

Embodiment 2

[0031] In the R & D and production base of Changzhou Institute of Building Sciences, Jiangsu Province, the on-site construction process of the present invention is adopted, and the concrete inner wall and plank of the base building are used as the substrate, and the polyurethane foam plastic raw materials are sprayed on site to form polyurethane foam on the surface of these substrates. The protective layer is used to insulate the substrate.

[0032] During construction, the polyurethane foam raw material used is a 1:1 mixture of non-flame retardant polyurethane rigid foam combination material (component A) that meets the Q / 3204AGC008 standard, that is, white material and thick MDIPM200, that is, black material; the equipment for heating the raw material is Industrial electric furnace; the spraying equipment is FF-1600 high-pressure airless polyurethane sprayer; the equipment for heating the coating layer is infrared lamp.

[0033] During construction, the ambient temperature i...

Embodiment 3

[0037] In a cold store in Changzhou City, Jiangsu Province, the on-site construction process of the present invention is adopted, and the concrete inner wall of the cold store and the cast iron pipe are used as the substrate, and the polyurethane foam plastic raw material is sprayed on site to form a polyurethane foam protective layer on the surface of these substrates to keep the substrate warm. , Waterproof treatment.

[0038] During construction, the ambient temperature is -40°C to -30°C.

[0039] Construction used raw material, various equipment are all identical with embodiment 1.

[0040] The construction process is as follows:

[0041] Such as figure 2 and image 3 As shown, the flame-retardant polyurethane rigid foam combination material (A component) that meets the Q / 3204AGC008 standard, that is, the white material, and the thick MDIPM200, that is, the black material, are heated to 30°C respectively, and the weight ratio is 1:1, and they are respectively loaded in...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention relates to in-situ spraying process of protective polyurethane plastic foam layer, and features that at the environment temperature of -60 to +10 deg.c, polyurethane plastic is first heated and then sprayed with one sprayer to form coating on the surface of the base body, and the coating is finally heated with heater to foam and form foamed protective polyurethane plastic layer. Compared with available technology, the present invention has the advantages of lower construction temperature, high performance of the protective polyurethane plastic foam layer, simple construction process, low cost, etc.

Description

technical field [0001] The invention relates to an on-site spraying construction process for a protective layer of polyurethane foam plastics, in particular to an on-site spraying construction process under the condition of low ambient temperature. Background technique [0002] In recent years, polyurethane foam has been widely used as the surface protective layer of substrates made of cement, concrete, metal, wood and other materials. These substrates can be various pipes and storage tanks for heating, water supply, oil supply, etc.; roofs, interior and exterior walls, roofs, beams, columns, etc. of buildings; thermal insulation containers; refrigeration facilities, cold storage, etc. The polyurethane foam protective layer uses the closed pores inside the polyurethane foam to keep the substrate warm and waterproof. At present, there are mainly two construction methods for the protective layer of polyurethane foam: the first method is to make polyurethane foam into a plate ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/24B05D1/12B05D1/38B05D3/00
Inventor 杨江金尹哲学苏春华
Owner JIANGSU NIGAO SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap