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

Method for preparing microcapsule coated ammonium polyphosphate

A technology of coating ammonium polyphosphate and microcapsules, which is applied in the field of materials, can solve the problems of emigration, unsustainable flame retardancy, and poor compatibility

Inactive Publication Date: 2011-02-16
TONGJI UNIV
View PDF5 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, since APP is an inorganic flame retardant, it is easily affected by external environmental factors during use, causing it to agglomerate, causing uneven distribution, and even moving out from the inside of the matrix, making the flame retardant performance difficult to last. , APP has poor compatibility with the polymer system, and while endowing the polymer with flame retardant properties, it tends to reduce other properties of the polymer

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
  • Method for preparing microcapsule coated ammonium polyphosphate
  • Method for preparing microcapsule coated ammonium polyphosphate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Preparation of aqueous MCAPP

[0027] First use H 2 O Pre-soak APP to provide conditions for the aggregation of Sipan 80 / 85 on the APP surface.

[0028] In Example 1, the following three mixtures are marked as W 11 , W 12 , W 13 :

[0029] W 11 : "APP clay" (10g APP+1g H 2 O).

[0030] W 12 : Span 80 / 85 (Span80:Span85=3:2; 5g) dissolved in toluene (30ml).

[0031] W 13 : MDI (15g) and DBDL (0.78g) were dissolved in toluene (15ml).

[0032] Mix the organic phase W with a constant temperature magnetic stirrer 12 with W containing capsule core material 11 Stir at high speed for 30 min at room temperature. After the water-containing APP on the surface is wrapped and dispersed by the mixed dispersant, add the solution W 13 , under the condition of high-speed stirring (2000r / min), the temperature was raised to 63° C. to carry out the polymerization reaction of the mixed dispersant film wrapped on its surface, and the reaction was continued for 4 hou...

Embodiment 2

[0034] Example 2: Preparation of anhydrous MCAPP

[0035] In Example 2, the following 3 mixtures are marked as W 21 , W 22 , W 23 :

[0036] W 21 : APP paste (10g APP).

[0037] W 22 : Span 80 / 85 (Span80:Span85=3:2; 5g) dissolved in toluene (30ml).

[0038] W 23 : MDI (2g) and DBDL (0.1g) were dissolved in toluene (15ml).

[0039] The organic phase W was first mixed with a constant temperature magnetic stirrer. 22 with W containing capsule core material 21 Stir at high speed for 30 min at room temperature. After the APP coated with mixed dispersant on the surface is dispersed in toluene, add the solution W 23 , under the condition of high-speed stirring (2000r / min), the temperature was raised to 63° C., so that the mixed dispersant film wrapped on the APP surface was polymerized, and the reaction was continued for 4 hours. After the reaction, the microcapsule slurry was poured out and washed with toluene and water respectively to remove unreacted MDI and uncoated ...

Embodiment 3

[0041] Example 3: Preparation of MCAPP with acetone as organic solvent

[0042] Same as Example 1, first use H 2 O pre-soaks APP to provide conditions for the aggregation of the mixed dispersant on the APP surface.

[0043] In Example 3, the following three mixtures are marked as W31 , W 32 , W 33 ,:

[0044] W 31 : "APP clay" (10g APP+1g H 2 O).

[0045] W 32 : Span 80 / 85 (Span80:Span85=3:2; 5g) dissolved in acetone (30ml).

[0046] W 33 : MDI (15g) and DBDL (0.78g) were dissolved in acetone (15ml).

[0047] Mix the organic phase W with a constant temperature magnetic stirrer 32 with W containing capsule core material 31 Stir at high speed for 30 min at room temperature. After the water-containing APP on the surface is wrapped and dispersed by the mixed dispersant, add the solution W 33 , under the condition of high-speed stirring (2000r / min), the temperature was raised to 54° C. to carry out the polymerization reaction of the mixed dispersant film wrapped on i...

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 belongs to the technical field of materials, and in particular relates to a method for preparing microcapsule coated ammonium polyphosphate (MCAPP). The method comprises the following steps of: uniformly dispersing APP containing water or not containing water in an organic solvent by utilizing a mixed dispersing agent; adding diisocyanate substances and a catalyst, and performing polymerization with hydroxy on the dispersing agent; and washing with water and the organic solvent, filtering, and drying to obtain the microcapsulated APP. Compared with APP, the microcapsule coated ammonium polyphosphate has the advantages of obviously improving water resistance and obviously improving a moisture absorption agglomeration phenomenon; and the MCAPP has good compatibility with a polymer substrate and good dispersability in the polymer substrate, so the excellent flame retardancy of the APP is fully achieved. The method successfully solves the problem that the flame retardancy of an inorganic flame retardant in the polymer substrate cannot be last, and realizes the expansion of the field of polymer flame retardancy modification.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of ammonium polyphosphate (APP) using microcapsules. Background technique [0002] With the increasingly wide application of polymer materials, flame retardants, as the most effective flame retardant modification additives, have developed into a wide variety of systems with various properties. According to the form of flame retardant in the polymer system, it can be divided into two types: additive type and reactive type. Among them, the additive flame retardant is simply dispersed in the matrix resin, and does not chemically react with the matrix resin and other components during the process; while the reactive flame retardant often participates in chemical reactions in the form of reactive monomers or crosslinking agents, and Finally, it exists in the polymer system in the form of structural units. [0003] APP is an intumescent inorganic fl...

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
IPC IPC(8): C08L75/04C09C3/10C08K9/10C08G18/32C09C1/00B01J13/14
Inventor 刘琳朱云卿
Owner TONGJI UNIV
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