Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Nitrogen and phosphorus containing leather fire retardant and preparation method thereof

A technology of flame retardant and leather, applied in the field of high-efficiency synergistic flame retardant containing nitrogen and phosphorus and its preparation, can solve the problems of unfavorable popularization and application, high production cost, and reduced mechanical strength, and achieve simple and easy preparation process, Improve flame retardant efficiency and good filling effect

Inactive Publication Date: 2017-03-15
海宁皮革研究院
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The properties of leather are essentially different from those of synthetic polymer materials. Using flame retardants in other industries to treat leather will greatly reduce the performance of leather, such as poor appearance and feel, reduced air permeability, and reduced mechanical strength.
So far, there has been little research on flame retardants for leather at home and abroad, and the developed products have rarely been popularized and applied.
Someone from Sichuan University synthesized an intumescent flame retardant amino resin with certain tanning properties and a leather flame retardant pentaerythritol phosphate melamine resin that integrates acid source, gas source and carbon source. These two nitrogen and phosphorus synergistic flame retardants are both It can significantly improve the flame retardancy of leather, and has little impact on the performance of leather, but the preparation process is complicated and the production cost is high, which is not conducive to popularization and application

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
  • Nitrogen and phosphorus containing leather fire retardant and preparation method thereof
  • Nitrogen and phosphorus containing leather fire retardant and preparation method thereof
  • Nitrogen and phosphorus containing leather fire retardant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: a kind of nitrogen-containing phosphorus-containing leather flame retardant, described flame retardant is hydroxymethylated four hydroxymethyl phosphorus urea, and its structural formula is: (HOCH 2 HNCONHCH 2 ) n P + (CH 2 NHCONH 2 ) 4-n (1≤n≤4).

Embodiment 2

[0023] Example 2: The first preparation method for preparing the above-mentioned nitrogen-containing and phosphorus-containing leather flame retardant, adding 4 parts of urea into a double-necked bottle connected with a condenser tube, and adding a small amount of deionized water, and placing it at a constant temperature Stir in a water-bath magnetic stirrer, add 1 part of quaternary phosphonium salt during slow heating, continue to heat up to 90 ° C, after 1 hour of reaction, add a small amount of deionized water, continue reaction for 1 hour until the reaction is complete. After the solution is naturally cooled, adjust the pH to 9.0 with 0.5mol / L NaOH, weigh 3 parts of formaldehyde, slowly add the formaldehyde into the double-necked bottle, add a small amount of distilled water, place it in a constant temperature water bath magnetic stirrer, and heat to 65 ℃, stirred for 1 hour, then added 0.9 part of sulfonating agent to carry out sulfonation reaction, and continued to stir ...

Embodiment 3

[0024] Embodiment 3: the second preparation method of the nitrogen-containing and phosphorus-containing leather flame retardant as described above is similar to Example 1, adding 4 parts of urea to a double-necked bottle connected with a condenser tube, and adding a small amount of deionized Water, placed in a constant temperature water bath magnetic stirrer, add 1 part of quaternary phosphonium salt during slow heating, continue to heat up to 100 ° C, after 1 hour of reaction, add a small amount of deionized water, continue reaction for 1 hour until the reaction is complete. After the solution is naturally cooled, adjust the pH to 8.5 with 0.5mol / L NaOH, weigh 2.5 parts of formaldehyde, slowly add the formaldehyde into the double-necked bottle, add a small amount of distilled water, place it in a constant temperature water bath magnetic stirrer, and heat to 70 ℃, after stirring for 1 h, add 1 part of sulfonating agent to carry out sulfonation reaction, and continue stirring fo...

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
oxygen indexaaaaaaaaaa
oxygen indexaaaaaaaaaa
oxygen indexaaaaaaaaaa
Login to View More

Abstract

The invention discloses a nitrogen and phosphorus containing leather fire retardant and a preparation method thereof. The fire retardant is methylolation tetrakis hydroxymethyl phosphonium sulfate urea (M-THPS-U) of which the structural formula is (HOCH2HNCONH2)nP<+>(CH2NHCONH2)4-n (n ranges from 1 to 4). The preparation method comprises the following two steps: step 1, performing reaction on phosphonium salt and urea to generate THPS-U; and step 2, performing hydroxymethyl reaction on formaldehyde and THPS-U; and then sulfonating through a sulfonating agent to obtain a target product, namely, M-THPS-U. According to the preparation method, phosphonium salt, urea and formaldehyde are treated as the main raw materials to synthesize a leather fire retardant which contains nitrogen and phosphorus fire retarding elements, is high in leather filling performance and can be combined well with leather fibers. The preparation method is simple and convenient to popularize.

Description

technical field [0001] The invention relates to the technical field of synthesis of leather flame retardants, in particular to a novel high-efficiency synergistic flame retardant containing nitrogen and phosphorus and a preparation method thereof. Background technique [0002] In recent years, in order to reduce the loss of life and property caused by fire, fire protection requirements have become increasingly stringent. The production and sales of flame retardants in the world have been increasing, and the annual production has reached 1.45-1.55 million tons. With the enhancement of human awareness of environmental protection, the most widely used halogen-based flame retardants will be difficult to continue to develop in the 21st century because of the release of toxic gases during use. Flame retardants will gradually be replaced by environmentally friendly flame retardants. Among the flame retardants that have been developed, the most commonly used flame retardants for le...

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 Applications(China)
IPC IPC(8): C14C9/00C09K21/12
CPCC14C9/00C09K21/12
Inventor 程凡孙鸣鄂涛毛培
Owner 海宁皮革研究院
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com