A kind of self-extinguishing waterborne polyurethane resin, preparation method and application

A water-based polyurethane, self-extinction technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of self-extinction, inability to obtain large molecular chains, small molecular weight, etc., to improve chemical resistance and scratch resistance Non-toxic, easy to handle, and the effect of improving adhesion

Active Publication Date: 2022-08-05
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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  • A kind of self-extinguishing waterborne polyurethane resin, preparation method and application
  • A kind of self-extinguishing waterborne polyurethane resin, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0098] Mix 1,3-dibromopropane and tris(hydroxymethylaminomethane) in an ethanol solvent with a molar ratio of 1:4, react under reflux conditions for 8 hours, cryogenic crystallisation at -5°C after the reaction, filter and add the filtrate to acidify with HBr To pH 2, then cryogenically crystallized at -5 °C and then suction filtered, the filter cake was taken and dissolved in absolute ethanol, and the pH was adjusted to 10 with sodium hydroxide solution, and then -5 °C cryogenic crystallization, suction filtration, and drying to obtain the product Crude. The crude product was first dissolved in hot absolute ethanol, cooled naturally for 30 min, vacuum filtration to remove insolubles, then recrystallized at room temperature, and filtered to obtain the pure product.

[0099] The 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] Preparative Example 2: Preparation of 1,4-bis((trimethylol)methylamino)butane

[0102] 1,4-bis((trimethylol)methylamino)butane was prepared according to the above method, except that the raw material 1,3-dibromopropane was replaced with 1,4-dibromobutane.

[0103] The 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] Preparative Example 3: Preparation of 1,5-bis((trimethylol)methylamino)pentane

[0106] 1,5-bis((trimethylol)methylamino)pentane was prepared according to the above method, except that the raw material 1,3-dibromopropane was replaced with 1,5-dibromopentane.

[0107] The 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]120 grams of polycaprolactone diol, 2 grams of polyethylene glycol monomethyl ether, 3 grams of dimethylolpropionic acid, and 17.5 grams of 1,4-cyclohexanedimethanol were added to a mixture with a condenser and a stirrer. Add 72 grams of IPDI, 0.08 grams of Bi@8108, and 50 grams of acetone to the four-necked flask of acetone, then add 1.9 grams of dimethylethanolamine, react at 35 degrees for 10 minutes, then add a mixed solution of 9 grams of 1,3-bis((trimethylol)methylamino)propane and 36 grams of deionized water, React at 45 degrees for 30 minutes; ...

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Abstract

The invention discloses a self-extinguishing waterborne polyurethane resin, a preparation method and an application. The resin is prepared by mixing and reacting raw materials comprising the following components in the presence of a catalyst: S1, isocyanate; S2, diamine with multiple hydroxyl groups ; S3, macromolecular polyol; S4, monohydric alcohol and / or dihydric alcohol containing polyoxyethylene segment in main chain and / or side chain; S5, small polyol chain extender; S6, hydrophilic compound or with Hydrophilic potential compound; S7, neutralizer; S8, small molecule diamine chain extender. The resin side chain provided by the present invention has a plurality of hydroxyl groups, and can be fully cross-linked with the isocyanate curing agent to form a network polymer chain, so as to increase the particle size of the latex particles and obtain a large molecular weight self-matting polyurethane resin, and chemical resistance. and excellent scratch resistance.

Description

technical field [0001] The invention relates to a self-extinguishing resin, in particular to a self-extinguishing waterborne polyurethane resin, a preparation method and an application. Background technique [0002] Matte resins are becoming more and more popular due to their unique visual feel. Matte resin can be divided into two ways: externally added matting powder and self-extinguishing. By adding external matting powder, it is easy to cause problems such as matting powder precipitation and poor scratch resistance. The self-extinction resin has been greatly developed in recent years. The principle of the self-extinction resin is that the latex particles with a particle size larger than 1100 nanometers remain spherical after film formation. After the light is incident, it forms diffuse reflection and cannot be emitted back, resulting in glossiness. decline. This is prone to problems such as insufficient dense film formation and insufficient chemical resistance of the re...

Claims

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Application Information

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Patent Type & Authority Patents(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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