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

Active Publication Date: 2021-05-28
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there is a problem, because the molecular chain of the resin is blocked, it is impossible to obtain a molecular chain with a large molecular weight, so even if the particle size of the emulsion is large, the molecular weight is too small, and it cannot be self-extinction

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] Preparatory Example 1: Preparation of 1,3-bis((trimethylol)methylamino)propane

[0098] Mix 1,3-dibromopropane and trishydroxymethylaminomethane in an ethanol solvent at a molar ratio of 1:4, react under reflux for 8 hours, cryogenically crystallize at -5°C after the reaction, filter and take the filtrate to acidify with HBr To pH 2, cryogenically crystallize at -5°C and then filter with suction, take the filter cake and dissolve it in absolute ethanol, and adjust the pH to 10 with sodium hydroxide solution, then crystallize in cryogenically at -5°C, filter with suction, and dry to obtain the product Crude. The crude product was first dissolved in hot absolute ethanol, cooled naturally for 30 minutes, vacuum filtered to remove insoluble matter, then recrystallized at room temperature, and filtered to obtain the pure product.

[0099] NMR characterization is as follows:

[0100] 1 H NMR (CDCl 3 ,400MHz,TMS):δ1.58(m,2H),2.55(t,4H),3.38(m,12H).

Embodiment 2

[0101] Preparatory Example 2: Preparation of 1,4-bis((trimethylol)methylamino)butane

[0102] Prepare 1,4-bis((trimethylol)methylamino)butane according to the above method, the only difference is that the raw material 1,3-dibromopropane is replaced by 1,4-dibromobutane.

[0103] NMR characterization is as follows:

[0104] 1 H NMR (CDCl 3 ,400MHz,TMS):δ1.4(m,4H),2.45(m,4H),3.48(m,12H).

Embodiment 3

[0105] Preparatory Example 3: Preparation of 1,5-bis((trimethylol)methylamino)pentane

[0106] Prepare 1,5-bis((trimethylol)methylamino)pentane according to the above method, the only difference is that the raw material 1,3-dibromopropane is replaced by 1,5-dibromopentane.

[0107] NMR characterization is as follows:

[0108] 1 H NMR (CDCl 3 ,400MHz,TMS):δ1.19(m,2H),1.48(m,4H),2.55(t,4H),3.48(m,12H).

[0109] Example 1

[0110]Add 120 g of polycaprolactone diol, 2 g of polyethylene glycol monomethyl ether, 3 g of dimethylolpropionic acid, and 17.5 g of 1,4-cyclohexanedimethanol into a Add 72 grams of IPDI, 0.08 grams of Bi@8108, and 50 grams of acetone to a four-necked flask, react at 70°C for 3 hours, the NCO value is 1.8%, and the theoretical value is 1.89%; cool down to 40°C, add 300 grams of acetone, then add 1.9 grams of dimethylethanolamine, react for 10 minutes at 35 degrees, then add 9 grams of 1,3-bis ((trimethylol) methylamino) propane and 36 grams of deionized ...

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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.

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

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/32C09D175/06C09D175/08
CPCC08G18/3278C09D175/06C09D175/08
Inventor 周操孙常青胡海东晋云全纪学顺曹玉阳王震
Owner WANHUA CHEM GRP CO LTD
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