Water-proof moisture-permeable polyurethane thermoplasticity elastomer and preparation method thereof

Abstract

The invention relates to the technical field of the thermoplasticity elastomer, in particular to a water-proof moisture-permeable polyurethane thermoplasticity elastomer and a preparation method thereof. The water-proof moisture-permeable polyurethane thermoplasticity elastomer is prepared from polyurethane colloidal particles, wherein the polyurethane colloidal particles are prepared from the following raw materials in parts by weight: 40-90 parts of polyester polyol or polyether polyol, 15-45 parts of diisocyanate and 3-12 parts of chain extender; the polyester polyol is obtained in a way that at least one of polyatomic acid and polyester and polyhydric alcohol are subjected to dealcoholization and dehydration condensation according to a mole ratio of 1to (1.01-1.2) in a vacuum fusion method, the hydroxyl value of the polyester polyol is 20-120mgKOH / g, and the acid value of the polyester polyol is 0.1-2mgKOH / g. The thermoplasticity elastomer has the advantages of good plasticization processing, high natural degradation speed and environmental protection, can be regulated according to the moisture-permeable requirements and can also resist bacteria and avoid dust mists.

Description

technical field

[0001] The invention relates to the technical field of thermoplastic elastomers, in particular to a waterproof and moisture-permeable polyurethane thermoplastic elastomer and a preparation method thereof. Background technique

[0002] The production process of traditional polytetrafluoroethylene composite film is not easy and the cost is high, it is difficult to be degraded by nature, and the combustion temperature is as high as 405 ℃. Large-scale use makes polytetrafluoroethylene composite film gradually become a killer of the environment and other side effects. Contents of the invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide a waterproof and moisture-permeable polyurethane thermoplastic elastomer, which is well plasticized and processed, can be adjusted according to moisture permeability requirements, and has a fast natural degradation rate , green and environment...

Examples

Embodiment 1

[0041] A waterproof and moisture-permeable polyurethane thermoplastic elastomer, the waterproof and moisture-permeable polyurethane thermoplastic elastomer is made of polyurethane granules, and the polyurethane granules are composed of the following raw materials in parts by weight:

[0042] 50 parts of polyester polyol or polyether polyol

[0043] 40 parts of diisocyanate

[0044] 10 parts of chain extender;

[0045] Among them, polyester polyol is made of polybasic acid and polyol according to the molar ratio of 1:1.01 through dealcoholization and dehydration polycondensation by vacuum melting method. Its hydroxyl value is 20mgKOH / g and acid value is 0.1mgKOH / g.

[0046] The polybasic acid is a mixture of azelaic acid, terephthalic acid and isophthalic acid in a weight ratio of 2:0.5:1.4.

[0047] The polyhydric alcohol is ethylene glycol, 1,3-butanediol, 1,4-butanediol, diethylene glycol, neopentyl glycol, 2-methyl-1,3-propanediol, hexanediol, 3 -Methyl 1,5-pentanediol, ...

Embodiment 2

[0055] A waterproof and moisture-permeable polyurethane thermoplastic elastomer, the waterproof and moisture-permeable polyurethane thermoplastic elastomer is made of polyurethane granules, and the polyurethane granules are composed of the following raw materials in parts by weight:

[0056] 60 parts of polyester polyol or polyether polyol

[0057] 32.5 parts of diisocyanate

[0058] 7.5 parts of chain extender;

[0059] Among them, polyester polyol is made of polybasic acid and polyol according to the molar ratio of 1:1.05 through dealcoholization and dehydration polycondensation by vacuum melting method. Its hydroxyl value is 40mgKOH / g and acid value is 0.5mgKOH / g.

[0060] The polybasic acid is succinic acid, adipic acid, azelaic acid, sebacic acid, terephthalic acid, isophthalic acid or maleic acid.

[0061] Described polyhydric alcohol is made of 1,3-butanediol, 2-methyl-1,3-propanediol, 3-methyl 1,5-pentanediol and 1,4-cyclohexanedimethanol with weight ratio 1: A mixt...

Embodiment 3

[0069] A waterproof and moisture-permeable polyurethane thermoplastic elastomer, the waterproof and moisture-permeable polyurethane thermoplastic elastomer is made of polyurethane granules, and the polyurethane granules are composed of the following raw materials in parts by weight:

[0070] 70 parts of polyester polyol or polyether polyol

[0071] 25 parts of diisocyanate

[0072] 5 parts of chain extender;

[0073] Among them, polyester polyol is made of polybasic acid and polyol according to the molar ratio of 1:1.1 through dealcoholization and dehydration polycondensation by vacuum melting method. Its hydroxyl value is 70mgKOH / g and acid value is 1mgKOH / g.

[0074] The polybasic acid is a mixture of azelaic acid, terephthalic acid and isophthalic acid in a weight ratio of 3:1:1.8.

[0075] Described polyhydric alcohol is made of 1,3-butanediol, 2-methyl-1,3-propanediol, 3-methyl 1,5-pentanediol and 1,4-cyclohexanedimethanol with weight ratio 1: A mixture composed of 1:1...

technical field

[0001] The invention relates to the technical field of thermoplastic elastomers, in particular to a waterproof and moisture-permeable polyurethane thermoplastic elastomer and a preparation method thereof. Background technique

[0002] The production process of traditional polytetrafluoroethylene composite film is not easy and the cost is high, it is difficult to be degraded by nature, and the combustion temperature is as high as 405 ℃. Large-scale use makes polytetrafluoroethylene composite film gradually become a killer of the environment and other side effects. Contents of the invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the object of the present invention is to provide a waterproof and moisture-permeable polyurethane thermoplastic elastomer, which is well plasticized and processed, can be adjusted according to moisture permeability requirements, and has a fast natural degradation rate , green and environment...

Examples

Embodiment 1

[0041] A waterproof and moisture-permeable polyurethane thermoplastic elastomer, the waterproof and moisture-permeable polyurethane thermoplastic elastomer is made of polyurethane granules, and the polyurethane granules are composed of the following raw materials in parts by weight:

[0042] 50 parts of polyester polyol or polyether polyol

[0043] 40 parts of diisocyanate

[0044] 10 parts of chain extender;

[0045] Among them, polyester polyol is made of polybasic acid and polyol according to the molar ratio of 1:1.01 through dealcoholization and dehydration polycondensation by vacuum melting method. Its hydroxyl value is 20mgKOH / g and acid value is 0.1mgKOH / g.

[0046] The polybasic acid is a mixture of azelaic acid, terephthalic acid and isophthalic acid in a weight ratio of 2:0.5:1.4.

[0047] The polyhydric alcohol is ethylene glycol, 1,3-butanediol, 1,4-butanediol, diethylene glycol, neopentyl glycol, 2-methyl-1,3-propanediol, hexanediol, 3 -Methyl 1,5-pentanediol, ...

Embodiment 2

[0055] A waterproof and moisture-permeable polyurethane thermoplastic elastomer, the waterproof and moisture-permeable polyurethane thermoplastic elastomer is made of polyurethane granules, and the polyurethane granules are composed of the following raw materials in parts by weight:

[0056] 60 parts of polyester polyol or polyether polyol

[0057] 32.5 parts of diisocyanate

[0058] 7.5 parts of chain extender;

[0059] Among them, polyester polyol is made of polybasic acid and polyol according to the molar ratio of 1:1.05 through dealcoholization and dehydration polycondensation by vacuum melting method. Its hydroxyl value is 40mgKOH / g and acid value is 0.5mgKOH / g.

[0060] The polybasic acid is succinic acid, adipic acid, azelaic acid, sebacic acid, terephthalic acid, isophthalic acid or maleic acid.

[0061] Described polyhydric alcohol is made of 1,3-butanediol, 2-methyl-1,3-propanediol, 3-methyl 1,5-pentanediol and 1,4-cyclohexanedimethanol with weight ratio 1: A mixt...

Embodiment 3

[0069] A waterproof and moisture-permeable polyurethane thermoplastic elastomer, the waterproof and moisture-permeable polyurethane thermoplastic elastomer is made of polyurethane granules, and the polyurethane granules are composed of the following raw materials in parts by weight:

[0070] 70 parts of polyester polyol or polyether polyol

[0071] 25 parts of diisocyanate

[0072] 5 parts of chain extender;

[0073] Among them, polyester polyol is made of polybasic acid and polyol according to the molar ratio of 1:1.1 through dealcoholization and dehydration polycondensation by vacuum melting method. Its hydroxyl value is 70mgKOH / g and acid value is 1mgKOH / g.

[0074] The polybasic acid is a mixture of azelaic acid, terephthalic acid and isophthalic acid in a weight ratio of 3:1:1.8.

[0075] Described polyhydric alcohol is made of 1,3-butanediol, 2-methyl-1,3-propanediol, 3-methyl 1,5-pentanediol and 1,4-cyclohexanedimethanol with weight ratio 1: A mixture composed of 1:1...

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