CN101307138A - Unsaturated polyester resin modified by by-product of benzoic anhydride - Google Patents
Unsaturated polyester resin modified by by-product of benzoic anhydride Download PDFInfo
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- CN101307138A CN101307138A CNA2008100286643A CN200810028664A CN101307138A CN 101307138 A CN101307138 A CN 101307138A CN A2008100286643 A CNA2008100286643 A CN A2008100286643A CN 200810028664 A CN200810028664 A CN 200810028664A CN 101307138 A CN101307138 A CN 101307138A
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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 5 portions 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
The present invention relates to a kind of unsaturated polyester resin, particularly a kind of unsaturated polyester resin that utilizes the by-product of benzoic anhydride modification.
Background technology
Unsaturated polyester resin is used widely as fiber reinforced plastic pipe raw materials for production such as burning into sand pipes.The kind of unsaturated polyester resin is a lot, the higher and not environmental protection of these unsaturated polyester resin ubiquity costs shortcoming, and utilize the quality of pipelines such as burning into sand pipe of its production also not satisfactory.In addition; in the phthalic anhydride production process, can produce a certain amount of distillation light fraction---by-product of benzoic anhydride; include a certain amount of phthalic anhydride and phenylformic acid in these distillation light fractions; as directly with its discharging; phthalic anhydride and phenylformic acid in the distillation light fraction can cause severe contamination to environment, and also can cause the waste of resource, therefore are the protection environment; the saving data need be recycled the distillation light fraction.Traditional method that the distillation light fraction is recycled is that the distillation light fraction is collected, and uses as the phthalic anhydride raw materials for production after treatment.The technology of this recycling is complicated, and facility investment is more, and cost recovery is higher.For addressing the above problem, be necessary to develop a kind of new unsaturated polyester resin, be intended to utilize the distillation light fraction that in the phthalic anhydride production process, produces, reduce the cost of unsaturated polyester resin, prevent the pollution of the environment, reduce the investment that the distillation light fraction is recycled, and improve the quality of pipelines such as burning into sand pipe.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of unsaturated polyester resin that utilizes the by-product of benzoic anhydride modification, this unsaturated polyester resin has the good characteristics of pipeline quality such as burning into sand pipe that cost is low, utilize its production, and the by product of its raw material sources in phthalic anhydride is produced, thereby can prevent the pollution of the environment, and can reduce the investment that the distillation light fraction is recycled.
The technical solution adopted for the present invention to solve the technical problems is:
The unsaturated polyester resin that utilizes by-product of benzoic anhydride to produce is characterized in that it is to be made by the raw material of following parts by weight: 9.5～10 parts of MALEIC ANHYDRIDE, 1 part of phthalic anhydride, 7～7.6 parts of by-product of benzoic anhydride, 1.5～2 parts of propylene glycol, 5～6 parts of ethylene glycol, 4～5 parts of Diethylene Glycols, 10～11 parts of vinylbenzene.
The voltinism index of this unsaturated polyester resin finished product: acid value be 15～20mgKOH/g, viscosity be 300～400cps, solids content 65～70%, gel time 25～26min, set time 170～175 ℃ of 35～40min, exothermic peak temperatures, mechanical performance index is: tensile strength 40～60Mpa, elongation 5～6%, flexural strength 70～80Mpa.
By-product of benzoic anhydride is the distillation light fraction that produces in the phthalic anhydride production process.
The present invention can be prepared as follows:
Successively with the Diethylene Glycol of certain mass; ethylene glycol; propylene glycol; phthalic anhydride; through pretreated by-product of benzoic anhydride; cis-butenedioic anhydride and organotin catalysts are put in the reactor; start stirrer; heating then; make material temperature rising in the reactor; begin to carry out building-up reactions; top temperature is no more than 220 ℃ in the reaction process; and use nitrogen protection. when being reacted to a certain degree (after acid value=35～45mgKOH/g); begin to vacuumize; after about 1 hour; vacuum breaker. synthetic unsaturated polyester in the reactor is transferred to dilution dilute in the still; the dilution temperature is controlled at 60～70 ℃. wherein; phenolic inhibitor and vinylbenzene that the certain mass that drops into is in advance arranged in the dilution still. in the dilution; start stirring; and inspect the part chemical property of this unsaturated polyester resin finished product by random samples. after quality examination was qualified, the discharging can promptly obtained the special-purpose unsaturated polyester resin of fiber reinforced plastic pipe of up to specification and customer demand.
The invention has the beneficial effects as follows: unsaturated polyester resin of the present invention has the good characteristics of pipeline quality such as burning into sand pipe that cost is low, utilize its production, and its raw material has made full use of the by product in the phthalic anhydride production, thereby can prevent the pollution of the environment, and can reduce the investment that the distillation light fraction is recycled.
The present invention is further described below in conjunction with embodiment.
Embodiment
Embodiment 1
Get 9.5 kilograms of MALEIC ANHYDRIDE; 1 kilogram of phthalic anhydride; 7 kilograms of by-product of benzoic anhydride; 1.5 kilograms of propylene glycol; 5 kilograms of ethylene glycol; Diethylene Glycol is put in the reactor for 4 kilograms; start stirrer; heating then; make material temperature rising in the reactor; begin to carry out building-up reactions; top temperature is no more than 220 ℃ in the reaction process; and use nitrogen protection. when being reacted to a certain degree (after acid value=35～45mgKOH/g); begin to vacuumize; after about 1 hour; vacuum breaker. synthetic unsaturated polyester in the reactor is transferred to dilution dilute in the still; the dilution temperature is controlled at 60～70 ℃. wherein; dilution has 10 kilograms of the phenolic inhibitor of the certain mass that drops in advance and vinylbenzene in the still. in the dilution; start stirring; and inspect the part chemical property of this unsaturated polyester resin finished product by random samples. after quality examination is qualified; the discharging can, can make the acid value of meeting customer need is 15～20mgKOH/g; viscosity is 300～400cps; solids content 65～70%; gel time 25～26min; set time 35～40min; 170～175 ℃ of exothermic peaks; tensile strength 40～60Mpa; elongation 5～6%; the special-purpose unsaturated polyester resin of the fiber reinforced plastic pipe of flexural strength 70～80Mpa.
Embodiment 2
Get 10 kilograms of MALEIC ANHYDRIDE; 1 kilogram of phthalic anhydride; 7.6 kilograms of by-product of benzoic anhydride; 2 kilograms of propylene glycol; 6 kilograms of ethylene glycol; 5 kilograms of Diethylene Glycols; put in the reactor; start stirrer; heating then; make material temperature rising in the reactor; begin to carry out building-up reactions; top temperature is no more than 220 ℃ in the reaction process; and use nitrogen protection. when being reacted to a certain degree (after acid value=35～45mgKOH/g); begin to vacuumize; after about 1 hour; vacuum breaker. synthetic unsaturated polyester in the reactor is transferred to dilution dilute in the still; the dilution temperature is controlled at 60～70 ℃. wherein; dilution has 11 kilograms of the phenolic inhibitor of the certain mass that drops in advance and vinylbenzene in the still. in the dilution; start stirring; and inspect the part chemical property of this unsaturated polyester resin finished product by random samples. after quality examination is qualified; the discharging can, can make the acid value of meeting customer need is 15～20mgKOH/g; viscosity is 300～400cps; solids content 65～70%; gel time 25～26min; set time 35～40min; 170～175 ℃ of exothermic peaks; tensile strength 40～60Mpa; elongation 5～6%; the special-purpose unsaturated polyester resin of the fiber reinforced plastic pipe of flexural strength 70～80Mpa.
Claims (2)
1. utilize the unsaturated polyester resin of by-product of benzoic anhydride modification, it is characterized in that it is to be made by the raw material of following parts by weight: 9.5～10 parts of MALEIC ANHYDRIDE, 1 part of phthalic anhydride, 7～7.6 parts of by-product of benzoic anhydride, 1.5～2 parts of propylene glycol, 5～6 parts of ethylene glycol, 4～5 parts of Diethylene Glycols, 10～11 parts of vinylbenzene.
2. the unsaturated polyester resin that utilizes the by-product of benzoic anhydride modification according to claim 1, the acid value that it is characterized in that this unsaturated polyester resin are that 15～20mgKOH/g, viscosity are that 300～400cps, solids content 65～70%, gel time are 25～26min, set time to be that 35～40min, the highest heating temp are 170～175 ℃, tensile strength 40～60Mpa, elongation 5～6%, flexural strength 70～80Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100286643A CN101307138B (en) | 2008-06-05 | 2008-06-05 | Unsaturated polyester resin modified by by-product of benzoic anhydride |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100286643A CN101307138B (en) | 2008-06-05 | 2008-06-05 | Unsaturated polyester resin modified by by-product of benzoic anhydride |
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| Publication Number | Publication Date |
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| CN101307138A true CN101307138A (en) | 2008-11-19 |
| CN101307138B CN101307138B (en) | 2010-11-17 |
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| CN2008100286643A Expired - Fee Related CN101307138B (en) | 2008-06-05 | 2008-06-05 | Unsaturated polyester resin modified by by-product of benzoic anhydride |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102174178A (en) * | 2011-03-15 | 2011-09-07 | 宜兴市兴合树脂有限公司 | Unsaturated polyester resin for pultrusion and preparation method thereof |
| CN102181012A (en) * | 2011-01-24 | 2011-09-14 | 刘义贤 | Light-cured crystal rubber and use thereof |
| CN103183784A (en) * | 2011-12-29 | 2013-07-03 | 江苏长三角精细化工有限公司 | High pressure glass fiber reinforced plastic pipeline resin used for oil fields |
| CN103214626A (en) * | 2013-03-29 | 2013-07-24 | 镇江联成化学工业有限公司 | Method for synthesizing unsaturated polyester resin by utilizing glycerol and phthalic anhydride by-product |
| CN109232870A (en) * | 2018-09-11 | 2019-01-18 | 惠州市固德尔合成材料有限公司 | A kind of recycling and reusing method of unsaturated-resin synthesis process waste liquid |
| CN109651606A (en) * | 2018-12-20 | 2019-04-19 | 镇江联成化学工业有限公司 | In the method for polybasic acid anhydride by-product production unsaturated polyester resin |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325914A (en) * | 2000-05-29 | 2001-12-12 | 桂林市万和有限责任公司 | Air-drying unsaturated polyester resin for putty |
| CN1640910A (en) * | 2004-12-22 | 2005-07-20 | 华南理工大学 | Unsaturated polyester synthesizing method |
| CN100453577C (en) * | 2006-03-23 | 2009-01-21 | 华东理工大学华昌聚合物有限公司 | Process for producing terephthalic unsaturated polyester resin by using terephthalic acid rinsing residue |
-
2008
- 2008-06-05 CN CN2008100286643A patent/CN101307138B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181012A (en) * | 2011-01-24 | 2011-09-14 | 刘义贤 | Light-cured crystal rubber and use thereof |
| CN102174178A (en) * | 2011-03-15 | 2011-09-07 | 宜兴市兴合树脂有限公司 | Unsaturated polyester resin for pultrusion and preparation method thereof |
| CN102174178B (en) * | 2011-03-15 | 2012-11-14 | 宜兴市兴合树脂有限公司 | Unsaturated polyester resin for pultrusion and preparation method thereof |
| CN103183784A (en) * | 2011-12-29 | 2013-07-03 | 江苏长三角精细化工有限公司 | High pressure glass fiber reinforced plastic pipeline resin used for oil fields |
| CN103214626A (en) * | 2013-03-29 | 2013-07-24 | 镇江联成化学工业有限公司 | Method for synthesizing unsaturated polyester resin by utilizing glycerol and phthalic anhydride by-product |
| CN109232870A (en) * | 2018-09-11 | 2019-01-18 | 惠州市固德尔合成材料有限公司 | A kind of recycling and reusing method of unsaturated-resin synthesis process waste liquid |
| CN109651606A (en) * | 2018-12-20 | 2019-04-19 | 镇江联成化学工业有限公司 | In the method for polybasic acid anhydride by-product production unsaturated polyester resin |
| CN109651606B (en) * | 2018-12-20 | 2021-04-09 | 镇江联成化学工业有限公司 | Method for producing unsaturated polyester resin from polycarboxylic anhydride by-product |
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| Publication number | Publication date |
|---|---|
| CN101307138B (en) | 2010-11-17 |
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