Unlock instant, AI-driven research and patent intelligence for your innovation.

High-temperature resistant peelable water-based silica sol polyurethane microcapsule emulsion and preparation method thereof

A technology of polyurethane microcapsules and water-based silicon, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problem that the temperature resistance cannot be taken into account, and achieve the effects of low cost, excellent temperature resistance and simple process flow

Inactive Publication Date: 2015-03-11
SHANGHAI CHENGYING NEW MATERIALS +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coating film has the advantages of non-combustibility, non-toxicity, no pollution to the environment, and good peeling performance. The water-based polyurethane resin VOCs currently available on the market can barely meet the requirements of the tobacco and food packaging industries, but the temperature resistance performance cannot be taken into account.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-temperature resistant peelable water-based silica sol polyurethane microcapsule emulsion and preparation method thereof
  • High-temperature resistant peelable water-based silica sol polyurethane microcapsule emulsion and preparation method thereof
  • High-temperature resistant peelable water-based silica sol polyurethane microcapsule emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The components and parts by weight of the high temperature-resistant peelable water-based silica sol polyurethane microcapsule emulsion of this embodiment are shown in Table 1. Its preparation method comprises the following steps:

[0029] (1) 26 parts of polybutylene adipate diol with a number average molecular weight of 2000 were vacuum dehydrated at 130°C for 1.5h, and then placed in a three-necked flask equipped with a stirrer, a reflux condenser, and a thermometer , lower the temperature to 50°C, add 22 parts of diphenylmethane diisocyanate (MDI), and control the temperature at 75°C for 2.5 hours;

[0030] (2) Add 4 parts of dimethylolpropionic acid (DMPA) to react for 2 hours, add 2.5 parts of 1,4 butanediol to react for 2 hours;

[0031] (3) Lower the temperature to 40°C, add 4 parts of neutralizing agent triethylamine (TEA) to neutralize for 1 hour, then discharge the material, add to the aqueous silica sol solution diluted with 15 parts of silica sol with 180 ...

Embodiment 2

[0034] The components and parts by weight of the high temperature-resistant peelable water-based silica sol polyurethane microcapsule emulsion of this embodiment are shown in Table 1. Its preparation method comprises the following steps:

[0035] (1) 38 parts of polyneopentyl glycol adipate diol with a number average molecular weight of 3000 were vacuum dehydrated at 120°C for 1 hour, and then placed in a three-necked flask equipped with a stirrer, a reflux condenser, and a thermometer , then lower the temperature to 60°C, add a mixture of 34 parts of toluene diisocyanate (TDI), control the temperature at 80°C, and copolymerize for 3 hours;

[0036] (2) Add 9 parts of dimethylolbutyric acid for hydrophilic chain extension reaction, the reaction time is 1.5h, then add 7 parts of neopentyl glycol for 3h;

[0037] (3) Lower the temperature to 40°C, then add 9 parts of dimethylethanolamine to neutralize for 0.5h, then discharge, add to the aqueous silica sol solution diluted with...

Embodiment 3

[0040] The components and parts by weight of the high temperature-resistant peelable water-based silica sol polyurethane microcapsule emulsion of this embodiment are shown in Table 1. Its preparation method comprises the following steps:

[0041] (1) Vacuum dehydrate 32 parts of polycaprolactone polyol with a number average molecular weight of 1500 at 125°C for 1 hour, then place it in a three-necked flask equipped with a stirrer, reflux condenser, and thermometer, and then cool it down to 55°C ℃, add 26 parts of isophorone diisocyanate (IPDI), control the temperature at 85 ℃, and copolymerize for 2.5 hours;

[0042] (2) Add 6.5 parts of dimethylolbutyric acid for chain extension reaction, the reaction time is 1h, add 4 parts of ethylene glycol to react for 2.5h;

[0043] (3) Lower the temperature to 45°C, then add 6.5 parts of triethanolamine to neutralize for 1 hour, then discharge, add to the aqueous silica sol solution diluted with 30 parts of silica sol with 250 parts of...

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
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a high-temperature resistant peelable water-based silica sol polyurethane microcapsule emulsion and a preparation method thereof. The microcapsule emulsion comprises, by weight, 26-38 parts of large-molecule polyalcohol, 22-34 parts of diisocyanate, 4-9 parts of hydrophilic chain extenders, 2.5-7 parts of small-molecule alcohol chain extenders, 4-9 parts of neutralizers, 0.6-2.8 parts of amine chain extenders, 15-40 parts of water-based silica sol and 180-320 parts of water. The preparation method includes steps of dehydrating the large-molecule polyalcohol in vacuum, adding the diisocyanate to react to obtain a prepolymer, adding the hydrophilic chain extenders, the small-molecule alcohol chain extenders and neutralizers respectively to react and then disperse the prepolymer in silica sol aqueous solution at a high speed so as to complete shearing emulsification, adding the amine chain extenders to carry out chain extending reaction so as to obtain the microcapsule emulsion. The microcapsule emulsion is applicable to a resin matrix of peelable paint, has excellent temperature resistance, weather resistance, peelability and water resistance, and can be applied to fields of packaging paints in food and tobacco industries widely.

Description

technical field [0001] The invention relates to a peeling coating and a preparation method thereof, in particular to a high temperature-resistant peelable water-based silica sol polyurethane microcapsule emulsion and a preparation method thereof. Background technique [0002] The basic performance of the peeling coating is its peelability, that is, the ease of peeling off the base film (PET film, OPP film, etc.) cleanly. The quality of peelability can generally be characterized by the peeling force between the peeling coating and the base film. Peeling coatings with high peeling properties (very small peeling force) have always been a major difficulty in the research and development and application of peeling coatings, especially with the gradual promotion of high-speed peeling machinery applications, this problem is particularly prominent. [0003] Waterborne polyurethane is a stable synthetic technology. The coating film has the advantages of non-combustibility, non-toxi...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/65C08G18/61C08G18/34C08G18/32C09D175/06C09D175/04
Inventor 虞明东刘杰李付亚
Owner SHANGHAI CHENGYING NEW MATERIALS