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

A kind of tertiary amine modified product of aliphatic isocyanate and its preparation method and light-stable polyurethane foam

An isocyanate and aliphatic technology, used in the field of light-stabilized polyurethane foam, can solve the problems of insufficient mechanical properties, durability, poor aging resistance, and reduced foam physical properties.

Active Publication Date: 2021-11-23
WANHUA CHEM GRP CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Compared with aromatic isocyanates, aliphatic isocyanates have lower activity, and the overall degree of post-curing reaction of foams is lower, resulting in shorter polyurethane chain segments formed, reducing the physical properties of foams, causing insufficient mechanical properties, and lower durability and aging resistance. Bad question

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
  • A kind of tertiary amine modified product of aliphatic isocyanate and its preparation method and light-stable polyurethane foam
  • A kind of tertiary amine modified product of aliphatic isocyanate and its preparation method and light-stable polyurethane foam
  • A kind of tertiary amine modified product of aliphatic isocyanate and its preparation method and light-stable polyurethane foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] N,N,N'-trimethyl-N'-hydroxyethyl bisaminoethyl ether modification of HDI trimer:

[0047] Put 200g of HT100 (HDI trimer, Wanhua Chemical) into a three-neck round bottom flask, heat to 60°C, add N,N,N'-trimethyl-N'-hydroxyethyl bisaminoethyl ether dropwise A total of 70g, the control dripping time is 1 hour. After the dropwise addition was complete, the reaction was allowed to proceed for another 2 hours. Nitrogen protection was introduced during the reaction. After the reaction was carried out for 3 hours, the reaction solution was taken every 15 minutes to titrate the NCO content. NCO content is tested according to "HGT2409-1992-Determination of Isocyanate Group Content in Polyurethane Prepolymer". The theoretical initial NCO content of this reaction is 16.30%, and the theoretical end point NCO content is 10.57%. When the NCO content of the reaction solution is close to the theoretical end point, and the difference between the NCO values ​​of two consecutive tests i...

Embodiment 2、3、4、5

[0054] Embodiment 2,3,4,5 and comparative example 1,2

[0055] The combination of isocyanates is shown in the table below:

[0056] Table 3 isocyanate combination formula

[0057]

[0058] The foaming formula is shown in the table below:

[0059] Table 4 Composition formula and foaming formula

[0060]

[0061]

[0062] Note: F3135 and K542 are polyether polyols produced by Wanhua Chemical; ZT1500 is polyetheramine produced by Zibo Zhengda Company; F420 is chain extender polyaspartate produced by Feiyang Chemical; XH2902 is developed by Hangzhou Chongyao Technology Co., Ltd. production of polyether modified silicone surfactant (commonly known as silicone oil); DBU: amine catalyst; Valikat Zr: organic zirconium catalyst produced by Umicore.

[0063] The foam preparation process is as follows: prepare the isocyanate composition according to the formula in Table 3, and after the dispersion is uniform, control the temperature of the material at 21-23°C for later use; p...

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

PropertyMeasurementUnit
densityaaaaaaaaaa
Functional group degreeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a tertiary amine modified product of aliphatic isocyanate and its preparation method and light-stable polyurethane foam, obtained by introducing molecular side chains containing tertiary amines into the structure of aliphatic isocyanate monomer derivatives. The aliphatic isocyanate is at least 2 functionality. The tertiary amine modified product of the aliphatic isocyanate in the present invention has self-catalysis, and can improve the reactivity of the aliphatic isocyanate monomer derivatives. When the tertiary amine modified product of aliphatic isocyanate described in the present invention is used to prepare polyurethane foam, the foam system can have good formability and after-curing performance, and the foam has good ultraviolet stability and excellent tensile properties and load-bearing capacity , elasticity and dimensional stability.

Description

technical field [0001] The invention relates to a tertiary amine modified product of aliphatic isocyanate, a preparation method thereof and a light-stable polyurethane foam prepared from the tertiary amine modified product of aliphatic isocyanate. Background technique [0002] Polyurethane foam is widely used in various industries of society due to its good performance, easy availability of raw materials and simple manufacturing methods. Generally, aromatic polyisocyanate such as toluene diisocyanate (TDI) or diphenylmethane diisocyanate (MDI) is used as the main raw material to produce polyurethane foam. However, the foam made of aromatic polyisocyanate is prone to aging under environmental factors such as light and humidity, and the specific performance is that it is easy to turn yellow, which brings troubles to downstream users in manufacturing and use. This is mainly due to the fact that the aromatic urethane bond is easily decomposed under ultraviolet radiation or humi...

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): C07D251/32C08G18/80C08G18/48C08G18/50C08G18/64C08G101/00
CPCC07D251/32C08G18/4081C08G18/482C08G18/4837C08G18/5024C08G18/6438C08G18/807C08G2110/0083
Inventor 滕向刘赵兴张聪颖孙立冬孙烨
Owner WANHUA CHEM GRP CO LTD