Unlock instant, AI-driven research and patent intelligence for your innovation.

Unsaturated polyester resin modified by by-product of benzoic anhydride

A technology of phthalic anhydride by-products and polyester resin, which is applied in the field of unsaturated polyester resin, can solve the problems of high recycling cost, complicated process, and large investment in equipment, and achieve the effects of good pipeline quality, reduced investment, and prevention of environmental pollution

Inactive Publication Date: 2010-11-17
中山联成化学工业有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of recycling process is more complicated, the equipment investment is more, and the recycling cost is higher.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take 9.5 kg of maleic anhydride, 1 kg of phthalic anhydride, 7 kg of by-products of phthalic anhydride, 1.5 kg of propylene glycol, 5 kg of ethylene glycol, and 4 kg of diethylene glycol and put them into the reactor, start the mixer, and then heat to make the reactor The temperature of the internal substance rises, and the synthesis reaction begins. During the reaction, the maximum temperature does not exceed 220°C, and it is protected with nitrogen. When the reaction reaches a certain level (acid value = 35 ~ 45mgKOH / g), start vacuuming, about 1 hour later , break the vacuum. Transfer the unsaturated polyester synthesized in the reaction kettle to the dilution kettle for dilution, and the dilution temperature is controlled at 60-70°C. Among them, there is a certain quality of phenolic polymerization inhibitor and benzene in the dilution kettle in advance. 10 kg of ethylene. During the dilution process, start stirring, and spot check some chemical properties of the unsa...

Embodiment 2

[0015] Take 10 kg of maleic anhydride, 1 kg of phthalic anhydride, 7.6 kg of by-products of phthalic anhydride, 2 kg of propylene glycol, 6 kg of ethylene glycol, and 5 kg of diethylene glycol, and put them into the reaction kettle, start the mixer, and then heat to make the reaction The temperature of the material in the kettle rises, and the synthesis reaction starts. During the reaction, the maximum temperature does not exceed 220°C, and it is protected with nitrogen. When the reaction reaches a certain level (acid value = 35 ~ 45mgKOH / g), start vacuuming, about 1 hour Finally, break the vacuum. Transfer the unsaturated polyester synthesized in the reaction kettle to the dilution kettle for dilution. The dilution temperature is controlled at 60-70°C. Among them, there is a certain quality of phenolic polymerization inhibitor and Styrene 11 kg. During the dilution process, start stirring, and sample some chemical properties of the finished unsaturated polyester resin. After p...

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
curing timeaaaaaaaaaa
elongationaaaaaaaaaa
bending strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses unsaturated polyester resin produced by utilization of phthalic anhydride by-products. The unsaturated polyester resin is made by the following raw materials by weight portion: 9.5 to 10 portions of maleic anhydride, 1 portion of phthalic anhydride, 7 to 7.6 portions of phthalic anhydride by-products, 1.5 to 2 portions of propylene glycol, 5 to 6 portions of glycol, 4 to 5portions of diethylene glycol and 10 to 11 portions of styrene. The unsaturated polyester resin is characterized by low cost and good quality of pipes such as sand-filled pipes and so on produced by utilization of the unsaturated polyester resin. Moreover, the raw materials of the unsaturated polyester resin fully utilize the by-products during the process of producing the phthalic anhydride, thereby the unsaturated polyester resin can prevent environmental pollution and reduce the investment for recycling distillation light fractions. The unsaturated polyester resin can be widely applied in the glass reinforced plastic pipe field.

Description

technical field [0001] The invention relates to an unsaturated polyester resin, in particular to an unsaturated polyester resin modified by phthalic anhydride by-products. Background technique [0002] Unsaturated polyester resin has been widely used as raw material for the production of FRP pipes such as sand pipes. There are many kinds of unsaturated polyester resins. These unsaturated polyester resins generally have the disadvantages of high cost and environmental protection, and the quality of pipelines such as sand-infused pipes produced by using them is not ideal. In addition, in the production process of phthalic anhydride, a certain amount of distilled light fractions—phthalic anhydride by-products will be produced. These distilled light fractions contain a certain amount of phthalic anhydride and benzoic acid. If they are directly discharged, the phthalic anhydride in the distilled light fractions And benzoic acid can cause serious pollution to the environment, and...

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 Patents(China)
IPC IPC(8): C08G63/40C08G63/52F16L9/12C08G63/181
Inventor 吴雄军
Owner 中山联成化学工业有限公司