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Regeneration process of urea-formaldehyde resin and composite material containing regenerated urea-formaldehyde resin

A technology of urea-formaldehyde resin and composite materials, which is applied in plastic recycling, reagents, educts, etc., can solve problems such as low heat resistance, serious environmental pollution, poor water resistance and electrical properties, and achieve good performance effects

Active Publication Date: 2017-06-06
广东奇德新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Urea-formaldehyde resin is hard, scratch-resistant, resistant to weak acids and bases and grease and other media, cheap, and has a certain degree of toughness, but it is easy to absorb water, so its water resistance and electrical properties are poor, and its heat resistance is not high.
[0005] As the requirements of the environment are getting higher and higher, more and more garbage is produced by urea-formaldehyde resin. Because it is difficult to recycle, the environmental pollution caused by it is becoming more and more serious.

Method used

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  • Regeneration process of urea-formaldehyde resin and composite material containing regenerated urea-formaldehyde resin
  • Regeneration process of urea-formaldehyde resin and composite material containing regenerated urea-formaldehyde resin
  • Regeneration process of urea-formaldehyde resin and composite material containing regenerated urea-formaldehyde resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A kind of regeneration process of urea-formaldehyde resin, comprises the following steps:

[0036] 1) Preliminary mechanical crushing of waste urea-formaldehyde resin products (waste urea-formaldehyde resin toilet lid);

[0037] 2) Place the particles obtained after preliminary mechanical crushing at -30°C to -20°C for sufficient low-temperature cold and brittle treatment;

[0038] 3) Mechanically pulverize the particles after low-temperature cold and brittle treatment;

[0039] 4) Perform jet milling on the material after mechanical pulverization again, fully mix and disperse the jet milled material and the mixed dispersion liquid of coupling agent and alcohol, and then dry it.

[0040] In step 1), preliminary mechanical pulverization until the particle size of the particles is below 10 cm.

[0041] In step 2), the time for the low-temperature cold-brittle treatment is 6-8 hours.

[0042] In step 3), perform mechanical pulverization again until the particle size is ...

Embodiment 2

[0050] A kind of regeneration process of urea-formaldehyde resin, comprises the following steps:

[0051] 1) Preliminary mechanical crushing of urea-formaldehyde resin products (urea-formaldehyde resin toilet lid);

[0052] 2) Place the particles obtained after preliminary mechanical crushing at -30°C to -20°C for sufficient low-temperature cold and brittle treatment;

[0053] 3) Mechanically pulverize the particles after low-temperature cold and brittle treatment;

[0054] 4) Perform jet milling on the material after mechanical pulverization again, fully mix and disperse the jet milled material and the mixed dispersion liquid of coupling agent and alcohol, and then dry it.

[0055] In step 1), preliminary mechanical pulverization until the particle size of the particles is below 10 cm.

[0056] In step 2), the time for the low-temperature cold-brittle treatment is 6-8 hours.

[0057] In step 3), perform mechanical pulverization again until the particle size is below 10 mes...

Embodiment 3

[0064] A kind of regeneration process of urea-formaldehyde resin, comprises the following steps:

[0065] 1) Preliminary mechanical crushing of urea-formaldehyde resin products (urea-formaldehyde resin toilet lid);

[0066] 2) Place the particles obtained after preliminary mechanical crushing at -30°C to -20°C for sufficient low-temperature cold and brittle treatment;

[0067] 3) Mechanically pulverize the particles after low-temperature cold and brittle treatment;

[0068] 4) Perform jet milling on the material after mechanical pulverization again, fully mix and disperse the jet milled material and the mixed dispersion liquid of coupling agent and alcohol, and then dry it.

[0069] In step 1), preliminary mechanical pulverization until the particle size of the particles is below 10 cm.

[0070] In step 2), the time for the low-temperature cold-brittle treatment is 6-8 hours.

[0071] In step 3), perform mechanical pulverization again until the particle size is below 10 mes...

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Abstract

The invention discloses a regeneration technique of a urea-formaldehyde resin, which comprises the following steps: 1) carrying out preliminary mechanical pulverization on a urea-formaldehyde resin product; 2) carrying out sufficient low-temperature cold brittleness treatment on the granules obtained by preliminary mechanical pulverization at -30--20 DEG C; 3) carrying out secondary mechanical pulverization on the granules subjected to low-temperature cold brittleness treatment; and 4) carrying out jet pulverization on the material subjected to secondary mechanical pulverization, sufficiently mixing and dispersing the material subjected to jet pulverization with a coupling agent-alcohol mixed dispersion solution, and drying. The invention also discloses a composite material containing the regenerated urea-formaldehyde resin, which is prepared from the following raw materials in parts by mass: 60-80 parts of PP (polypropylene), 10-20 parts of regenerated urea-formaldehyde resin prepared by the technique according to the claim 1, 10-20 parts of filler, 0.1-1 part of antioxidant, 1-3 parts of processing assistant, 5-10 parts of toughener and 3-5 parts of compatilizer. The technique can effectively recycle the urea-formaldehyde resin and uses the recycled urea-formaldehyde resin to prepare the composite material; and the composite material has favorable properties.

Description

technical field [0001] The invention relates to a regeneration process of urea-formaldehyde resin and a composite material containing the regenerated urea-formaldehyde resin. Background technique [0002] Classification of plastics: thermoplastic resins and thermosetting resins. The main difference between thermoplastic resins and thermosetting resins is that thermoplastic resins can be reused after heating and replasticizing, while thermosetting resins cannot be replasticized to achieve secondary use. Therefore, thermosetting resins have their own limited use, but because thermosetting resins are easy to use, low in price, and not easy to soften, they are widely used in tea sets, bath sets, and handicraft products. [0003] Urea-formaldehyde resin is generally a water-soluble resin, which is easy to cure. The cured resin is non-toxic, colorless, and has good light resistance. It will not change color after long-term use and thermoforming. Various colorants can be added to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J11/04C08L23/12C08L61/24C08L23/08C08L51/06C08K13/04C08K3/26C08K5/134C08K5/20C08K7/10C08K3/34
CPCY02P20/143Y02W30/62
Inventor 马元好饶德生陈云峰陈若垠
Owner 广东奇德新材料股份有限公司