Environment-friendly self-cleaning waterborne polyurethane and preparation method thereof

A polyurethane and environmentally friendly technology, applied in the field of nanomaterials and self-cleaning materials, can solve the problems of low body strength, poor bonding, tearing, etc., to delay the rate of rusting again, eliminate the existence of air, and improve the bonding strength Effect

Inactive Publication Date: 2021-03-02
山东岚泊湾旅游集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides an environment-friendly self-cleaning water-based polyurethane and its preparation method, which is mainly aimed at the polyurethane lining mold bonded to the surface of the steel mold table by the existing bonding process, and the surface of the steel mold table with uneven surfaces that are often derusted and polished. Poor bonding, and low body strength, problems such as "debonding", "bulging", "tearing" and "deformation" often occur in the process of preparing cement prefabricated parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A method for preparing a non-adhesive polyurethane liner mold, carried out according to the following steps:

[0062] (1) Preparation of components A and B of polyurethane lining mold raw materials

[0063] Accurately weigh polyester polyol, polyether polyol, extender, defoamer, catalyst and desiccant according to the following mass parts, and then stir and mix evenly to obtain component A;

[0064] Based on the sum of the mass of polyester polyol and polyether polyol as 100 parts, the mass parts of each component in component A are:

[0065] 20 parts polyester polyol

[0066] Polyether polyol 50 parts

[0067] Chain extender 5 parts

[0068] Defoamer 2 parts

[0069] Catalyst 0.002 parts

[0070] 10 parts of desiccant;

[0071] Accurately weigh the compound containing -NCO group and polyether polyol according to the following mass ratio, put it into the container, stir and react at 80-100°C for 2-6h, and after passing the -NCO value test, you can get the followin...

Embodiment 2

[0104] Compared with the above-mentioned Example 1, the molar ratio of reactive groups in [OH] / [NCO] was changed from 0.99 to 1.02, so as to achieve the effect described in Example 2 in Table 2 below.

Embodiment 3

[0106] Compared with the above-mentioned Example 1, the molar ratio of the reactive groups in [OH] / [NCO] was changed from 0.99 to 1.0, and the number of parts of phthalic anhydride polyester in the preparation was increased from 20 to 30 parts, and the polyether polyether The number of parts of alcohol 2 was reduced from 30 to 20 parts, thereby achieving the effect described in Example 3 in Table 2 below.

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PUM

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Abstract

The invention discloses environment-friendly self-cleaning waterborne polyurethane and a preparation method thereof. The preparation method comprises the following steps: preparing a component A and acomponent B of polyurethane lining mold raw materials; preparing a special cleaning agent; horizontally adjusting the surface of a steel die table; using an environment-friendly rust remover for rapidly removing rust on the surface of the steel die table; pasting a flow limiting frame edge with a certain height and width to the peripheral edge of the steel die table; quickly and uniformly flattening poured raw materials; and controlling the post-curing environment of the materials. The bonding strength effect between a prepared polyurethane lining mold and the steel mold table is excellent, the problems that a currently prepared polyurethane lining mold is poor in bonding effect on a rugged steel mold table, and debonding, bulging, tearing, deformation and the like occur in the using process are solved, the service life of the polyurethane lining mold is greatly prolonged, and the polyurethane lining mold can be repeatedly used for 100 times or above.

Description

technical field [0001] The invention relates to the research field of nanomaterials and self-cleaning materials, in particular to an environment-friendly self-cleaning water-based polyurethane with the functions of photodegrading surface organic pollutants, preventing dust adhesion, and sterilizing and preventing mildew, and a preparation method thereof. Background technique [0002] Since the concept of self-cleaning was proposed in the 1990s, it has become a hot and difficult point in scientific research and product development. Self-cleaning materials have the properties of preventing dust from adhering, surface pollutants are easy to fall off under external forces such as rain, and photodegradation of surface organic pollutants. It has the advantages of energy saving and environmental protection. [0003] Various self-cleaning materials have emerged one after another. Among them, nano-chinium dioxide has become a hot spot in the research of self-cleaning materials becaus...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/32C08G18/38
CPCC08G18/4018C08G18/4208C08G18/4825C08G18/4829C08G18/4854C08G18/6607C08G18/6618
Inventor 陈志华
Owner 山东岚泊湾旅游集团有限公司
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