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A one-component polyurethane coating

A polyurethane coating, one-component technology, used in polyurea/polyurethane coatings, coatings, etc., can solve the problems of uneven curing, high gloss loss, slow curing speed, etc., to improve anti-aging ability and anti-aging ability. Strong, fast curing effect

Inactive Publication Date: 2016-08-03
英德市佐桐化学品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing one-component polyurethane coatings have defects such as slow curing speed, uneven curing, and high gloss loss rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A single-component polyurethane coating, the weight percent of each component is: linseed oil 25, hexafunctional sorbitan polyether 10, toluene diisocyanate 5, naphthenate calcium 0.01, rosin water 59.99.

[0014] The technical indicators in this technical solution are: solid content 40%, Sward hardness 36, reverse impact strength greater than 115.3cm 2 / kg, the loss rate is 7% after one year.

Embodiment 2

[0016] A single-component polyurethane coating, the weight percent of each component is: linseed oil 27, hexafunctional sorbitan polyether 11, toluene diisocyanate 6, calcium naphthenate and lead naphthenate total 0.1, pine perfume 55.9.

[0017] The technical indicators in this technical solution are: solid content 41%, Sward hardness 36, reverse impact strength greater than 116.1cm 2 / kg, the loss rate is 8% after one year.

Embodiment 3

[0019] A kind of one-component polyurethane coating, the weight percent of described each component is: linseed oil 29, hexafunctional sorbitan polyether 12, toluene diisocyanate 7, lead naphthenate, tin naphthenate and zinc naphthenate A total of 0.2, pine perfume 51.8.

[0020] The technical indicators in this technical solution are: solid content 42%, Sward hardness 36, reverse impact strength greater than 116cm 2 / kg, the loss rate is 8% after one year.

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Abstract

The invention belongs to the technical field of polyurethane coatings, particularly relates to a single-component polyurethane coating and a preparation method thereof, and aims to provide a single-component polyurethane coating which is high in curing speed and solid content and low in gloss loss rate. In order to solve the problems, the invention provides the following technical scheme: the single-component polyurethane coating comprises the following components in percentage by weight: 25-35 % of linseed oil, 10-15% of six-functionality sorbitol polyether, 5-10% of toluene diisocynate, 0.01-0.5% of calcium naphthene ester and the balance of rosin water. The technical scheme has the advantages of high curing speed, uniformity, high solid content, low gloss loss rate and the like.

Description

technical field [0001] The invention belongs to the technical field of polyurethane coatings, in particular to a single-component polyurethane coating and a preparation method thereof. Background technique [0002] One-component water-based polyurethane coatings are a type of coatings that use water-based polyurethane resins as the base material and water as the dispersion medium. Water-based polyurethane coatings modified by cross-linking have good storage stability, coating film mechanical properties, water resistance, solvent resistance and aging resistance, and are similar to traditional solvent-based polyurethane coatings. They are one of the water-based polyurethane coatings. important direction of development. Cross-linked polyurethane can increase its solvent resistance and hydrolytic stability. The system composed of polyurethane aqueous dispersion mixed with a small amount of external crosslinking agent is called thermosetting waterborne polyurethane coating, als...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C08G18/76
Inventor 吕运征陈子路徐方王芳
Owner 英德市佐桐化学品有限公司
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