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Regenerative modification method of thermoset unsaturated polyester resin waste material

A polyester resin and unsaturated technology, applied in the field of regeneration and modification of thermosetting unsaturated polyester resin waste, can solve the problem that thermosetting unsaturated polyester resin waste cannot be effectively recycled and reused, and achieve good plasticity and reduce cross-linking. The effect of density

Inactive Publication Date: 2017-10-17
JIANGSU RUIKANG NEW MATERIAL TECH CO LTD
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the cured thermosetting unsaturated polyester resin waste cannot be effectively recycled and utilized, the present invention provides a method for regeneration and modification of thermosetting unsaturated polyester resin waste. The modified thermosetting unsaturated polyester resin obtained by the method is Saturated polyester resin has good plasticity and can be plasticized repeatedly

Method used

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  • Regenerative modification method of thermoset unsaturated polyester resin waste material
  • Regenerative modification method of thermoset unsaturated polyester resin waste material
  • Regenerative modification method of thermoset unsaturated polyester resin waste material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Stir 200 kg of the above-mentioned modified matrix, 300 kg of water, and 5 kg of alcoholysis agent ethylene glycol in an enamel kettle equipped with a 20kw high-shear emulsifying disperser to raise the temperature to 80-90°C, stirring intermittently, each time Run for 5 minutes with an interval of 2 minutes. After the temperature reaches 80°C, 0.8 kg of catalyst 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) is added, and the surface of the modified substrate is activated under high-speed shear stirring to activate the catalyst The time is 30-60 minutes.

[0049] Put the catalytically activated thermosetting resin waste slurry into a 1-ton enamel polymerization kettle, add 140 kg of water, 0.8 kg of dispersant calcium hydroxyphosphate, 0.2 kg of initiator azobisisobutyronitrile, and 10 kg of styrene (St) 20 kg of butyl acrylate (BA), heat up to 80°C, carry out suspension polymerization while stirring, polymerize for 3 hours, add a small amount of tert-butyl hydroperoxide, h...

Embodiment 2

[0052] The proportioning and process of this embodiment are as in embodiment 1, the only difference is that the catalyst is zinc acetylacetonate.

Embodiment 3

[0054] The proportioning and process of the present embodiment are as in embodiment 1, the only difference is that the catalyst is zinc acetate.

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Abstract

The invention discloses a regenerative modification method of a thermoset unsaturated polyester resin waste material. The method includes: using thermoset unsaturated polyester resin waste material particles as the modification base, using acrylate monomers as the modification monomers, using high-shear emulsifying and dispersing equipment to perform shear dispersion in aqueous dispersion at 80-100 DEG C and in the presence of a catalyst and an alcoholysis agent for 30-180 minutes, performing suspension polymerization or emulsion polymerization, and filtering to obtain modified thermoset unsaturated polyester resin, wherein the particle size of the modification base is 200-600 meshes, the catalyst is one or more of 1, 5, 7-triazabicyclo[4.4.0]dec-5-ene, acetylacetone and zinc acetate, and the alcoholysis agent is one or more of water, alcohol and carboxylic acid. The regenerative modification method has the advantages that a traditional polymerization method is used, large-scale regenerative modification of the thermoset unsaturated polyester resin waste material can be performed under the situation of low equipment investment, modification cost is low, and the thermoset unsaturated polyester resin waste material can be modified into novel thermoset high-molecular polymer capable of being subjected to direct compression molding.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a method for regeneration and modification of thermosetting unsaturated polyester resin waste. Background technique [0002] Thermosetting resins account for 15% of the entire plastic usage. The fully cured thermosetting resin, due to its non-melting and insoluble properties, becomes a kind of polymer waste that cannot be recycled, and is often classified as hazardous organic waste because it contains a small amount of organic volatiles, referred to as hazardous waste. Thermosetting resin waste has always been a high-molecular compound with high processing costs (incineration) and is difficult to recycle. However, with the development of the thermosetting resin industry, the domestic usage is increasing. According to the statistics of "China Synthetic Resin Association Unsaturated Resin Industry Association", the unsaturated resin in thermosetting resin reached 2.1 million tons in ...

Claims

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Application Information

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IPC IPC(8): C08F283/01C08F212/08C08F220/18C08F220/14C08F2/18C08F2/26C08F2/30C08L67/06C08L51/08
CPCC08F2/18C08F2/26C08F2/30C08F283/01C08L51/08C08L67/06C08F220/1804
Inventor 江永波
Owner JIANGSU RUIKANG NEW MATERIAL TECH CO LTD
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