CN105524263A - Preparation method for unsaturated polyester resin - Google Patents
Preparation method for unsaturated polyester resin Download PDFInfo
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- CN105524263A CN105524263A CN201510759093.0A CN201510759093A CN105524263A CN 105524263 A CN105524263 A CN 105524263A CN 201510759093 A CN201510759093 A CN 201510759093A CN 105524263 A CN105524263 A CN 105524263A
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- preparation
- dcpd
- reaction
- polyester resin
- unsaturated polyester
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- Macromonomer-Based Addition Polymer (AREA)
- Polyesters Or Polycarbonates (AREA)
Abstract
The invention provides a preparation method for unsaturated polyester resin, which belongs to the field of material preparation. The method is characterized by comprising the following steps: adding DCPD into a flask, carrying out heating for a reaction, then adding maleic anhydride, carrying out a reaction for 20 min with temperature controlled to be 170 to 180 DEG C, adding phthalic anhydride and propylene glycol, carrying out heating to 190 to 200 DEG C for a reaction and controlling an acid value to be 70 mg KOH/g; and then carrying out heating to 200 to 210 DEG C and vacuum-pumping, continuing the reaction until the acid value is 40 mg KOH/g, stopping the reaction and vacuum-pumping, adding a polymerization inhibitor when temperature drops to less than 90 DEG C, mixing the obtained mixture with styrene and carrying out filtering so as to obtain DCPD type UPR. Through modification of preparation technology and raw materials, the DCPD type UPR has better comprehensive properties compared with common UPR and greatly improved bending strength and air-drying properties; and the preparation method is simple, easy to operate and suitable for large-scale promotion and application.
Description
Technical field
The invention belongs to field of material preparation, particularly relate to a kind of preparation method of unsaturated polyester resin.
Background technology
Along with the continuous progress of science and technology, the technique that industry prepared by material is upgraded fast, and many new preparation technologies are applied in actual industrial production and go.Unsaturated polyester resins for general purpose (UPR) has excellent chemical resistance, electrical property and mechanical property, comparatively large portion is occupied at home in thermosetting resin application market, but because air-drying property is poor, constrain its application in the field such as glass reinforced plastic, coating.
Summary of the invention
The present invention is intended to solve the problem, and provides a kind of preparation method of unsaturated polyester resin.
A preparation method for unsaturated polyester resin, is characterized in that: get DCPD and add flask, add MALEIC ANHYDRIDE after reacting by heating, control temperature is at 170 DEG C ~ 180 DEG C reaction 20min, add phthalic anhydride and propylene glycol, be warmed up to 190 DEG C ~ 200 DEG C reactions, control acid number is 70mgKOH/g; Then be warmed up to 200 DEG C ~ 210 DEG C, vacuumize, and continuation reaction terminates reaction when acid number arrives 40mgKOH/g, stops vacuumizing, treats that temperature drops to less than 90 DEG C, add stopper, mix with vinylbenzene, obtain DCPD type UPR after filtration.
The preparation method of a kind of unsaturated polyester resin of the present invention, is characterized in that described flask is four-hole boiling flask.
The preparation method of a kind of unsaturated polyester resin of the present invention, is characterized in that the purity of described DCPD is 78%.
The preparation method of a kind of unsaturated polyester resin of the present invention, is characterized in that the purity of described DCPD is 85%.
The preparation method of a kind of unsaturated polyester resin of the present invention, it is characterized in that the Heating temperature of described DCPD is 160 DEG C, the reaction times is 30min.
The preparation method of a kind of unsaturated polyester resin of the present invention, by to preparation technology and starting material modified, the over-all properties of DCPD modification UPR is made to be better than general UPR, and flexural strength and air-drying property have significant improvement, preparation method preparation technology of the present invention is simple, easy handling, is suitable for large range promotion use.
Embodiment
A preparation method for unsaturated polyester resin, is characterized in that: get DCPD and add flask, add MALEIC ANHYDRIDE after reacting by heating, control temperature is at 170 DEG C ~ 180 DEG C reaction 20min, add phthalic anhydride and propylene glycol, be warmed up to 190 DEG C ~ 200 DEG C reactions, control acid number is 70mgKOH/g; Then be warmed up to 200 DEG C ~ 210 DEG C, vacuumize, and continuation reaction terminates reaction when acid number arrives 40mgKOH/g, stops vacuumizing, treats that temperature drops to less than 90 DEG C, add stopper, mix with vinylbenzene, obtain DCPD type UPR after filtration.
The preparation method of a kind of unsaturated polyester resin of the present invention, described flask is four-hole boiling flask.The purity of described DCPD is 78%.The purity of described DCPD is 85%.The Heating temperature of described DCPD is 160 DEG C, and the reaction times is 30min.In the process of hydrolyzed addition process synthesis DCPD modification UPR, along with the rising of temperature of reaction, lower boiling component can distillate together along with water from fractional column, and not too can affect the performance of product.Therefore, not high to the purity requirement of DCPD, but the form and aspect of DCPD can affect the quality of modification UPR.Along with the increase of DCPD consumption, viscosity, the acid number of modification UPR reduce gradually, and this is the hydroxyl reduction in the UPR owing to being formed, thus causes polarity to reduce, and acid number is reduced.Compared with universal UPR, modification UPR improves a lot than universal in flexural strength and air-drying property, and has the performances such as viscosity is little, solid content is high, is a kind ofly to have good electric property and the matrices of composite material of mechanical strength characteristics.Few than general UPR of pure free hydroxyl in DCPD modification UPR molecule, its oxygen solidification resistance to system when solidifying is little, so, good than general UPR of the air-drying property of DCPD modification UPR; The modification of DCPD makes alkyl 2986cm wherein
-1the peak area at place also reduces.Along with the raising of temperature, the pyrolysis characteristic temperature of DCPD modification UPR raises, and illustrate that its thermostability is become better and better, when temperature is lower than 420 DEG C, DCPD modification UPR and general UPR all has good thermostability.
Claims (5)
1. a preparation method for unsaturated polyester resin, is characterized in that: get DCPD and add flask, add MALEIC ANHYDRIDE after reacting by heating, control temperature is at 170 DEG C ~ 180 DEG C reaction 20min, add phthalic anhydride and propylene glycol, be warmed up to 190 DEG C ~ 200 DEG C reactions, control acid number is 70mgKOH/g; Then be warmed up to 200 DEG C ~ 210 DEG C, vacuumize, and continuation reaction terminates reaction when acid number arrives 40mgKOH/g, stops vacuumizing, treats that temperature drops to less than 90 DEG C, add stopper, mix with vinylbenzene, obtain DCPD type UPR after filtration.
2. the preparation method of a kind of unsaturated polyester resin as claimed in claim 1, is characterized in that described flask is four-hole boiling flask.
3. the preparation method of a kind of unsaturated polyester resin as claimed in claim 1, is characterized in that the purity of described DCPD is 78%.
4. the preparation method of a kind of unsaturated polyester resin as claimed in claim 1, is characterized in that the purity of described DCPD is 85%.
5. the preparation method of a kind of unsaturated polyester resin as claimed in claim 1, it is characterized in that the Heating temperature of described DCPD is 160 DEG C, the reaction times is 30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510759093.0A CN105524263A (en) | 2015-11-10 | 2015-11-10 | Preparation method for unsaturated polyester resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510759093.0A CN105524263A (en) | 2015-11-10 | 2015-11-10 | Preparation method for unsaturated polyester resin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105524263A true CN105524263A (en) | 2016-04-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510759093.0A Pending CN105524263A (en) | 2015-11-10 | 2015-11-10 | Preparation method for unsaturated polyester resin |
Country Status (1)
| Country | Link |
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| CN (1) | CN105524263A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906793A (en) * | 2016-06-25 | 2016-08-31 | 成都杰晟蜀邦新材料科技有限公司 | Water-based unsaturated polyester resin and preparation method thereof |
-
2015
- 2015-11-10 CN CN201510759093.0A patent/CN105524263A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105906793A (en) * | 2016-06-25 | 2016-08-31 | 成都杰晟蜀邦新材料科技有限公司 | Water-based unsaturated polyester resin and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160427 |