Self-extinction waterborne polyurethane resin as well as preparation method and application thereof

A water-based polyurethane, self-extinction technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of small molecular weight, inability to self-extinction, and inability to obtain large molecular chains, so as to improve adhesion and chemical resistance Sex and scratch resistance, easy handling effect
CN112851898AActive Publication Date: 2021-05-28WANHUA CHEM GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WANHUA CHEM GRP CO LTD
Publication Date
2021-05-28

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Abstract

The invention discloses self-extinction waterborne polyurethane resin as well as a preparation method and application thereof. The self-extinction waterborne polyurethane resin is prepared by mixing and reacting raw materials comprising the following components in the presence of a catalyst: S1, isocyanate; S2, diamine with a plurality of hydroxyl groups; S3, preparing macromolecular polyol; S4, monohydric alcohol and / or dihydric alcohol with a main chain and / or a side chain containing a polyoxyethylene chain segment; S5, a micromolecular polyol chain extender; S6, a hydrophilic compound or a compound with hydrophilic potential; S7, a neutralizer; and S8, a small molecule diamine chain extender. The side chain of the resin provided by the invention has a plurality of hydroxyl groups, and can be fully crosslinked with an isocyanate curing agent-form a net-shaped macromolecular chain, so that the self-extinction polyurethane resin with large molecular weight is obtained while the particle size of emulsion particles is increased, and the chemical resistance and scratch resistance are excellent.
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Description

technical field

[0001] The invention relates to a self-delustering resin, in particular to a self-delustering water-based polyurethane resin, a preparation method and an application. Background technique

[0002] Matte resins are becoming more and more popular due to their unique visual appeal. Matte resin can be divided into two methods: adding matting powder externally and self-matting. Adding matting powder externally is easy to cause problems such as precipitation of matting powder and poor scratch resistance. Self-dulling resin has been greatly developed in recent years. The principle of self-dulling resin is that latex particles with a particle size greater than 1100 nanometers remain spherical after film formation. After light is incident, it forms diffuse reflection and cannot be emitted back, resulting in glossiness. decline. This is prone to problems such as insufficient film formation and insufficient chemical resistance of the resin. In order to solve such pro...

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
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