Mono-acid blocked unsaturated polyester resin and preparation method for same

A polyester resin, unsaturated technology, applied in the field of monoacid-capped unsaturated polyester resin and its preparation, can solve the problem that the compatibility of the resin is greatly affected, it will not be used by ordinary customers, and the compatibility of glycerin is poor, etc. problem, achieve the effect of improving anti-yellowing, reducing water absorption and improving water resistance

Inactive Publication Date: 2012-07-11
湖州红剑聚合物有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high price, the price of the products produced is too high and will not be accepted by ordinary customers
[0006] 2. This defect can also be improved by using ethylene glycol and glycerin, but ethylene glycol itself has a symmetrical structure, and glycerin has poor compatibility. After a large amount is used, it has a great impact on the compatibility of the resin, and stratification often occurs or lighting phenomenon

Method used

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  • Mono-acid blocked unsaturated polyester resin and preparation method for same
  • Mono-acid blocked unsaturated polyester resin and preparation method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A monoacid-terminated unsaturated polyester resin, fed according to the following ratio:

[0036] (1) 13 parts of ethylene glycol

[0037] (2) Diethylene glycol 12 parts

[0038] (3) 14 parts of phthalic anhydride

[0039] (4) Maleic anhydride 22 parts

[0040] (5) 3 parts of benzoic acid

[0041] (6) 36 parts of styrene,

[0042] The preparation method of this monoacid end-capping type unsaturated polyester resin comprises the following steps:

[0043] Under the protection of high-purity nitrogen, first add (1) and (2) into the reaction pot according to the above-mentioned feeding ratio, start stirring at an average speed of 60r / min, and then put in (3)~(5) in proportion, start to heat up, and heat up to Keep warm at 150~160°C for 2 hours, the temperature of the distillation head should not exceed 105°C, then raise the temperature at a rate of 10°C per hour, and at 180~190°C at a rate of 5°C per hour, then gradually polycondense at 200~210°C for 2~ 6h, the reaction...

Embodiment 2

[0045] A monoacid-terminated unsaturated polyester resin, fed according to the following ratio:

[0046] (1) 13 parts of ethylene glycol

[0047] (2) Diethylene glycol 11 parts

[0048] (3) 3 parts of glycerin

[0049] (4) 13 parts of phthalic anhydride

[0050] (5) 7 parts of maleic anhydride

[0051] (6) Fumaric acid 18 parts

[0052] (7) 1.5 parts of benzoic acid

[0053] (8) Glacial acetic acid 0.5 parts

[0054] (9) 33 parts of styrene,

[0055] The preparation method of this monoacid end-capping type unsaturated polyester resin comprises the following steps:

[0056] Under the protection of high-purity nitrogen, first add (1)~(3) into the reaction pot according to the above-mentioned feeding ratio, start stirring at an average speed of 60r / min, and then put in (4)~(8) in proportion, and start to heat up. Keep warm at 150~160°C for 2 hours, the temperature of the distillation head does not exceed 105°C, then increase the temperature at a rate of 10°C per hour, and...

Embodiment 3

[0058] A monoacid-terminated unsaturated polyester resin, fed according to the following ratio:

[0059] (1) 11 parts of ethylene glycol

[0060] (2) Diethylene glycol 14 parts

[0061] (3) 3 parts of propylene glycol

[0062] (4) 20 parts of terephthalic acid

[0063] (5) Fumaric acid 22 parts

[0064] (6) 1 part of benzoic acid

[0065] (7) 0.5 parts of isooctanoic acid

[0066] (8) Lauric acid 0.5 parts

[0067] (9) 28 parts of styrene,

[0068] The preparation method of this monoacid end-capping type unsaturated polyester resin comprises the following steps:

[0069] Under the protection of pure nitrogen, first add (1)~(3) into the reaction pot according to the above-mentioned feeding ratio, start stirring at an average speed of 60r / min, then put in (4) in proportion, add 0.04 parts of tin oxyhydroxide, and start Heat up, heat up to 170~175°C for 2 hours, the temperature of the distillation head does not exceed 105°C, then heat up at a rate of 10°C per hour, and th...

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PUM

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Abstract

The invention belongs to the technical field of unsaturated polyester resin, and particularly relates to a mono-acid blocked unsaturated polyester resin, formed by using dibasic alcohol, saturated dibasic acid, unsaturated dibasic acid, a monobasic acid blocking agent and a diluting agent as raw materials, and then performing condensation polymerization; and the raw materials comprise, in parts by weight, (1) 19-28 parts of dibasic alcohol, (2) 10-25 parts of saturated dibasic acid, (3) 15-27 parts of unsaturated dibasic acid, (4) 1-7 parts of monobasic acid blocking agent, and (5) 28-37 parts of diluting agent. The invention further provides a preparation method for the mono-acid blocked unsaturated polyester resin. The product obtained by the preparation method provided by the invention is better in compatibility, better in hydrolytic stability and higher in hardness compared with common unsaturated resin, as well as high in strength.

Description

[0001] technical field [0002] The invention belongs to the technical field of unsaturated polyester resins, and in particular relates to a monoacid-terminated unsaturated polyester resin and a preparation method thereof. Background technique [0003] Ordinary unsaturated polyester resins are generally linear polymer compounds with ester bonds and unsaturated double bonds formed by polycondensation of saturated dibasic acids, unsaturated dibasic acids, diethylene glycol, ethylene glycol and propylene glycol. The unsaturated polyester resin obtained by the traditional method has poor strength, water resistance, yellowing resistance, aging resistance and chemical resistance, and has many defects. [0004] Traditional unsaturated polyester resins generally contain a large amount of diethylene glycol, which leads to unsaturated polyester resins with insufficient flexural strength, low flexural modulus, and a large number of ether bonds. Due to the particularity of ether bonds ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01C08G63/676
Inventor 徐红姚易新
Owner 湖州红剑聚合物有限公司
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