High-water-resistance polyester polyol and preparation method thereof

A polyester polyol and water resistance technology, applied in the field of polymers, can solve the problems of poor water resistance and decreased physical properties of materials, and achieve the effects of reducing polarity, reducing ester density and increasing flexibility

Pending Publication Date: 2022-04-15
山东亿鹏新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, polyester polyols used in polyurethane elastomers are mostly prepared by the reaction of adipic acid and ethylene glycol, butanediol, propylene glycol, etc. Polyurethane elastomers prepared from such polyester polyols have good hardness, tensile strength, Tear strength and other physical properties, but it is relatively poor on the opposite side of water resistance. Long-term placement in water medium will cause hydrolysis of a large number of ester groups in the molecular chain, which will cause a rapid decline in the physical properties of the material. Therefore, in some specific environments , limiting the use of such polyurethane elastomers

Method used

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  • High-water-resistance polyester polyol and preparation method thereof
  • High-water-resistance polyester polyol and preparation method thereof
  • High-water-resistance polyester polyol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of polyester polyol is provided in the present embodiment, and the preparation raw material of described polyester polyol comprises following component according to parts by weight:

[0029] Succinic acid: 22.5 parts;

[0030] Adipic acid: 15 parts;

[0031] Dimer acid; 7.5 parts;

[0032] Dodecanedioic acid: 30 parts;

[0033] Ethylene glycol: 7.5 parts;

[0034] 1,2-propanediol: 2.5 parts;

[0035] 1,8-octanediol: 6.25 parts;

[0036] 1,12-Dodecanediol: 8.75 parts;

[0037] Antioxidant 1098: 0.1 part;

[0038] Tetra-n-butyl titanate: 0.05 part.

[0039] The preparation method comprises the following steps:

[0040] (1) Under nitrogen protection, adipic acid, dimer acid, dodecanedibasic acid, 1,2-propanediol, 1,8-octanediol, 1,12-dodecanediol, antioxidant Add agent 1098 into a 2000mL four-necked reaction flask, stir evenly, and then raise the temperature at a constant rate of 15-20°C / h under the protection of nitrogen to 130-150°C, and carry out the est...

Embodiment 2

[0043] A kind of polyester polyol is provided in the present embodiment, and the preparation raw material of described polyester polyol comprises following component according to parts by weight:

[0044] Succinic acid: 15 parts;

[0045] Adipic acid: 22.5 parts;

[0046] Dimer acid; 7.5 parts;

[0047] Dodecanedioic acid: 30 parts;

[0048] Ethylene glycol: 7.5 parts;

[0049] 1,2-propanediol: 2.5 parts;

[0050] 1,8-octanediol: 6.25 parts;

[0051] 1,12-Dodecanediol: 8.75 parts;

[0052] Antioxidant 1098: 0.1 part;

[0053] Tetra-tert-butyl titanate: 0.05 parts.

[0054] The preparation method comprises the following steps:

[0055] (1) Under nitrogen protection, adipic acid, dimer acid, dodecanedibasic acid, 1,2-propanediol, 1,8-octanediol, 1,12-dodecanediol, antioxidant Add agent 1098 into a 2000mL four-necked reaction flask, stir evenly, and then raise the temperature at a constant rate of 15-20°C / h under the protection of nitrogen to 130-150°C, and carry out the...

Embodiment 3

[0058] A kind of polyester polyol is provided in the present embodiment, and the preparation raw material of described polyester polyol comprises following component according to parts by weight:

[0059] Succinic acid: 12 parts;

[0060] Adipic acid: 12 parts;

[0061] Dodecanedioic acid: 36 parts;

[0062] Ethylene glycol: 12 parts;

[0063] 1,2-propanediol: 4 parts;

[0064] 1,8-octanediol: 6 parts;

[0065] 1,12-Dodecanediol: 18 parts;

[0066] Antioxidant 1098: 0.1 part;

[0067] Tetra-n-butyl titanate: 0.05 part.

[0068] The preparation method comprises the following steps:

[0069] (1) Under nitrogen protection, add adipic acid, dodecanedibasic acid, 1,2-propanediol, 1,8-octanediol, 1,12-dodecanediol, and antioxidant 1098 into 2000mL In a four-necked reaction flask, stir evenly, then raise the temperature at a constant rate of 15-20°C / h under the protection of nitrogen, and raise the temperature to 130-150°C, and carry out the esterification and dehydration rea...

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PUM

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Abstract

The invention particularly relates to high-water-resistance polyester polyol and a preparation method thereof. The polyester polyol comprises the following components: 28-42 parts of long-chain dicarboxylic acid; 8 to 23 parts of short-chain dicarboxylic acid; 4 to 23 parts of succinic acid; 8 to 27 parts of long-chain dihydric alcohol; 8 to 15 parts of short-chain dihydric alcohol; 7-18 parts of ethylene glycol; 0.001 to 0.1 part of an antioxidant; and 0.005 to 0.1 part of a catalyst. The preparation method comprises the following steps: 1) uniformly stirring the long-chain dibasic acid, the long-chain dihydric alcohol, the short-chain dibasic acid, the short-chain dihydric alcohol and the antioxidant, and then carrying out esterification and dehydration reaction under the protection of nitrogen; 2) adding succinic acid and ethylene glycol into a reaction, and carrying out esterification dehydration reaction; and 3) adding a catalyst, keeping the temperature, performing reduced pressure distillation, and further performing condensation polymerization to obtain the polyester polyol. The polyurethane elastomer synthesized from the water-resistant polyester polyol prepared by the invention not only has excellent physical properties, but also has better water resistance.

Description

technical field [0001] The invention belongs to the technical field of polymers, in particular to a highly water-resistant polyester polyol and a preparation method thereof. Background technique [0002] Polyester polyol is one of the main raw materials of polyurethane, which can be used in many polyurethane products, such as coatings, adhesives, elastomers, rubber rollers, etc. At present, polyester polyols used in polyurethane elastomers are mostly prepared by the reaction of adipic acid and ethylene glycol, butanediol, propylene glycol, etc. Polyurethane elastomers prepared from such polyester polyols have good hardness, tensile strength, Tear strength and other physical properties, but it is relatively poor on the opposite side of water resistance. Long-term placement in water medium will cause hydrolysis of a large number of ester groups in the molecular chain, which will cause a rapid decline in the physical properties of the material. Therefore, in some specific envir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/52C08G63/16C08G63/78C08G18/42C08G18/68
Inventor 于向伟王宝山张淑芳王善民贾鹏
Owner 山东亿鹏新材料科技有限公司
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