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Method for in situ polymerization of surface modified hollow micro glass bead from urea-formaldehyde resin

A technology of hollow glass microspheres and urea-formaldehyde resin, which is applied in the treatment of dyed polymer organic compounds and fibrous fillers, etc., which can solve the problems of limited effect and reduction compared to the base material

Inactive Publication Date: 2012-01-11
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these modification methods have limited effects. Although the mechanical properties of composite materials have been significantly improved compared with those without modification, they are still seriously reduced compared to the base material.

Method used

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  • Method for in situ polymerization of surface modified hollow micro glass bead from urea-formaldehyde resin
  • Method for in situ polymerization of surface modified hollow micro glass bead from urea-formaldehyde resin
  • Method for in situ polymerization of surface modified hollow micro glass bead from urea-formaldehyde resin

Examples

Experimental program
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Effect test

example 1

[0022] Example 2: 30g of urea, 60g of formaldehyde and 400g of distilled water are fully mixed, and after the urea is dissolved, the pH of the system is adjusted to 7.5-8 with triethanol diamine, and the urea-formaldehyde prepolymerization is obtained after keeping at 65-70°C for 2 hours thing. Then add 5g of Tween 60 and 95g of hollow glass microspheres into the above prepolymer, and adjust the pH of the system to 3-4 after fully stirring; after 1.5h, filter, wash and dry the white product to obtain the modified product. Hollow glass microspheres with a core-shell structure—urea-formaldehyde resin products.

example 2

[0023] Example 3: 30g of urea, 30g of formaldehyde and 400g of distilled water are fully mixed, and after the urea is dissolved, the pH of the system is adjusted to 7.5-8 with triethanol diamine, and the urea-formaldehyde prepolymerization is obtained after keeping at 65-70°C for 2 hours things. Then add 2g Tween into 80g and 80g hollow glass microspheres into the above prepolymer, adjust the pH of the system to 3~4 after stirring thoroughly; after 1.5h, filter, wash and dry the white product to obtain the modified Good, hollow glass microspheres with core-shell structure - urea-formaldehyde resin products.

example 3

[0024] Example 4: 30g of urea, 60g of formaldehyde and 400g of distilled water are fully mixed, and after the urea is dissolved, the pH of the system is adjusted to 7.5-8 with triethylene glycol diamine, and the urea-formaldehyde prepolymerization is obtained after keeping at 65-70°C for 2 hours thing. Then add 5g of Tween 85 and 105g of hollow glass microspheres into the above prepolymer, and adjust the pH of the system to 3-4 after fully stirring; after 1.5h, filter, wash and dry the white product to obtain the modified product. Hollow glass microspheres with a core-shell structure—urea-formaldehyde resin products.

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Abstract

The invention relates to a new method for in situ polymerization of a surface modified hollow micro glass beads from urea-formaldehyde resin. The raw materials comprise the following components in part by weight: 30 parts of urea, 30-60 parts of formaldehyde, 2-5 parts of tween dispersant, 75-105 parts of hollow micro glass beads and 400 parts of distilled water. The method has a simple process; a product has a core-shell structure, wherein the core is the hollow micro glass beads and the shell is the urea-formaldehyde resin; the hollow micro glass beads modified by the method are added into a polypropylene / ethylene-octene copolymer base materials (PP / POE); and compared with a composite material of the hollow micro glass beads which are not subjected to surface modification and the hollow micro glass beads which are subjected to KH-550 silane coupling agent surface modification, the method has the advantages of obviously improving the interface compatibility of the hollow micro glass beads and the base materials and obviously improving the mechanical property of the composite materials. The hollow micro glass beads modified by the method can be widely applied to the fields of high-grade building materials, plastic, rubber, paints, electrical insulation materials, heat insulation, sound insulation, automobiles, aerospace, military special high-molecular composite materials and the like; meanwhile, the method provides a new idea for the surface modification of other inorganic particles.

Description

technical field [0001] The invention relates to a method for surface modification of hollow glass microspheres. It specifically relates to a new method for surface modification of hollow glass microspheres by in-situ polymerization using urea and formaldehyde as main raw materials. Background of the invention [0002] Hollow glass microspheres (also known as hollow glass microspheres, abbreviated as HGB) are a new micron-sized lightweight material developed in the 1950s and 1960s. Due to their excellent physical and chemical properties and performance, they are Known as "space age material". It has a series of advantages such as low density, high melting point, good electrical insulation, good fluidity, small shrinkage, strong stability, heat insulation, sound insulation, high temperature resistance, small thermal conductivity and thermal shrinkage coefficient, and is compounded with polymers. After endowing composite materials with many special functions, they are widely ...

Claims

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Application Information

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IPC IPC(8): C08G12/12C08K7/28C09C1/28C09C3/10
Inventor 李军伟吴湘锋刘峰
Owner TIANJIN CHENGJIAN UNIV
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