TWI720415B - Thermoplastic polyurethane composition without added diisocyanate - Google Patents

Abstract

A thermoplastic polyurethane composition without added diisocyanate, comprising butyl acrylate, methyl acrylate and acrylic acid added 10 to 50 parts by weight, 10 to 60 parts by weight, and 10 to 95 parts by weight, and 5 to 40 parts by weight The solvent is mixed, and the use amounts of diaminodiphenylmethane, phthalic anhydride and 1,3,5-tripropenylhexahydro-1,3,5-triazine are 0.01 to 20 parts by weight respectively, and Add 0.01 to 5 parts by weight of the initiator, and any one selected from the dispersion of tetraethylenepentamine, aminocyclohexane, diaminodiphenylmethane, m-xylene diamine and isophorone diamine as Additives are mixed and obtained by reaction.

Description

Thermoplastic polyurethane composition without added diisocyanate

The present invention is related to thermoplastic polyurethane (TPU), especially a thermoplastic polyurethane composition without added diisocyanate.

According to, Thermoplastic polyurethanes (TPU) is a kind of elastomer, which has been widely used in textile fabrics, shoe materials, clothing and other fields. It is usually through a film, and is bonded to clothing fabrics, such as high frequency. Or on shoes, it can be used as a trademark or other decoration, or it can further provide waterproof and moisture-permeable effects.

However, as shown in Figure 1, since traditional thermoplastic polyurethane is applied to films, the adhesion between it and fabrics such as fibers is temporary adhesion, which mainly uses polyurethane polymer chains 1a and 2 The isocyanate compound 2a is connected, but there is no other link to the film or the bonding site to be applied, so the bonding property is not good. In addition, if you look through an optical microscope, you can see that there is a gap between it and the fabric, and it is not fully bonded, and it is easy to produce obvious bubbles and holes; and through a scanning electron microscope (SEM), you can also see that it and the fabric Obviously still present a state of separation. This represents the poor fit of traditional thermoplastic polyurethane. In actual tests such as peel strength and tensile strength, it can also be found that the existing thermoplastic polyurethane is still insufficient in fit, and it is often easy to find peeling when using actual products. phenomenon.

In addition, the existing thermoplastic polyurethanes also contain diisocyanates, which not only generate cyanide free radicals during the bonding process between the thermoplastic polyurethane and the cloth, but also cause considerable damage to the environment and the human body, so it is not ideal. .

In view of this, in order to improve and solve the above-mentioned shortcomings, the inventor of the present invention made great efforts to research and cooperate with the application of scientific theory, and finally proposed an invention that is reasonable in design and effectively improves the above-mentioned shortcomings.

The main purpose of the present invention is to provide a thermoplastic polyurethane composition without added diisocyanate, which is selected from the group consisting of tetraethylenepentamine, aminocyclohexane, diaminodiphenylmethane, m-xylene diamine and isophos Any one of the dispersions of ketone diamine is used as an additive, so that there is no need to add diisocyanate when preparing the thermoplastic polyurethane composition, thereby improving the heat resistance of the thermoplastic polyurethane (TPU) at high temperature and the heat resistance at high temperature. It is stable and environmentally friendly due to the absence of diisocyanate and harmless to the human body.

Another object of the present invention is to provide a thermoplastic polyurethane composition without added diisocyanate, which can be further prepared into a film shape for use on fabrics such as fibers, which can improve the strong bonding effect with the fabric .

In order to achieve the above objective, the present invention provides a thermoplastic polyurethane composition without added diisocyanate, comprising butyl acrylate, methyl acrylate, acrylic acid, diaminodiphenylmethane, phthalic anhydride and 1,3, 5-triacryloylhexahydro-1,3,5-triazine dispersions are mixed; wherein, butyl acrylate, methyl acrylate and acrylic acid are added 10 to 50 parts by weight, 10 to 60 parts by weight, and 10 to 95 parts by weight, mixed with 5 to 40 parts by weight of solvent, and diaminodiphenylmethane, phthalic anhydride and 1,3,5-tripropenylhexahydro-1,3,5- The amount of triazine used is 0.01 to 20 parts by weight, and the starting agent is added in a weight ratio of 0.01 to 5 parts by weight, and is selected from the group consisting of tetraethylenepentamine, aminocyclohexane, diaminodiphenylmethane, and m-xylene. It is obtained by mixing any one of diamine and isophorone diamine dispersion with a usage amount of 0.01 to 0.5 parts by weight as an additive and reacting.

Based on the above list of ingredients as follows:

In order to enable your reviewer to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. However, the accompanying drawings are only for reference and illustration, and are not used to limit the present invention. .

Please refer to FIG. 1, which is a schematic diagram of the free radical chemical bonding according to the present invention. The present invention provides a thermoplastic polyurethane composition of a thermoplastic polyurethane composition without added diisocyanate. The large system includes butyl acrylate, methyl acrylate, acrylic acid, and diaminodiphenyl. Diaminodiphenylmethane (Diaminodiphenylmethane), phthalic acid anhydride (phthalic acid anhydride), 1,3,5-triacryloylhexahydro-1,3,5-triazine (Triacryloylhexahydro-1,3,5-triazin) The dispersion is mixed. In a specific embodiment, 30 parts by weight, 35 parts by weight, and 90 parts by weight of butyl acrylate, methyl acrylate, and acrylic are added, and mixed with 25 parts by weight of solvent. The solvent may be methyl formate, ethyl formate, propyl formate, n-butyl formate, n-pentyl formate, isoamyl formate, ethyl acetate, propyl acetate, butyl acetate, pentyl acetate or acetic acid Isoamyl ester.

The above-mentioned dispersions such as diaminodiphenylmethane, phthalic anhydride and 1,3,5-tripropenylhexahydro-1,3,5-triazine can also be powders or granules, and various usage amounts Both are 5 parts by weight. At the same time, add 0.5 parts by weight of the initiator. The initiator is a photo-initiator or a thermal initiator, and can be selected from potassium persulfate and azobisisobutyronitrile (Azobisisbutyronitrile). And any one of Benzildimethylketal (Benzildimethylketal). Finally, it is selected from tetnaethylene pentamine, diaminocyclohexane, diminodiphenylmethane, metaxylenediamine and isophoronedicamine. Any one of the dispersions is used as an additive, and the used amount is 0.5 parts by weight mixed and obtained by reaction.

In another embodiment, 25 parts by weight, 40 parts by weight, and 90 parts by weight of butyl acrylate, methyl acrylate and acrylic are added, and mixed with 25 parts by weight of solvent. The above-mentioned diaminodiphenylmethane, phthalic anhydride and 1,3,5-tripropenylhexahydro-1,3,5-triazine and other dispersions are used in 5 parts by weight, and then 0.5 Parts by weight of the starter, and selected from tetnaethylene pentamine, diaminocyclohexane, diminodiphenylmethane, metaxylenediamine and isophos Any one of the dispersions of Isophoronedicamine is used as an additive, and its usage amount is 0.5 parts by weight mixed and reacted to obtain another embodiment of the present invention.

Therefore, by the above-mentioned structure and composition, the thermoplastic polyurethane composition of the present invention without added diisocyanate can be obtained.

Accordingly, as shown in Figure 2, the bonding between the present invention and fabrics such as fibers is a free radical chemical bonding, and the composition can be further prepared into a film, except for the original polyurethane polymer chain 1. In addition, it can further provide such as diaminodiphenylmethane 2 and tetraethylenepentamine 3 to improve the bonding strength of the film or the bonding site to be applied. Therefore, in addition to improving the thermoplastic polyurethane (TPU) The heat resistance at high temperature and the thermal stability at high temperature are more environmentally friendly and harmless to the human body due to the absence of diisocyanate. It can also further improve the adhesion to achieve several effects.

Furthermore, since the composition of the present invention can be coated on a thermoplastic polyurethane film, the thermoplastic polyurethane can be prepared into a film by extrusion, injection, etc., and then the composition can be coated on It is formed on a film, so it can be used in conjunction with fabrics such as fibers to improve the strong bonding effect with the fabric.

In summary, this invention clearly achieves the intended purpose of use, and solves the deficiencies of conventional knowledge, and because of its novelty and advancement, it fully meets the requirements of an invention patent application. The application is filed in accordance with the Patent Law. Please check and verify in detail. Grant the patent in this case to protect the rights of the inventor.

However, the above descriptions are only the preferred and feasible embodiments of the present invention, and the scope of the patent of the present invention is not limited thereby. Therefore, all equivalent technologies, means and other changes made by using the description and drawings of the present invention are the same. It is included in the scope of the present invention, and is fully disclosed.

＜Acquaintances＞

1a: Polyurethane polymer chain

2a: Diisocyanate compound

<The present invention>

1: Polyurethane polymer chain

2: Diaminodiphenylmethane

3: Tetraethylenepentamine

Figure 1 is a schematic diagram of conventional transient bonding.

Figure 2 is a schematic diagram of the free radical chemical bonding according to the present invention.

1: Polyurethane polymer chain

2: Diaminodiphenylmethane

3: Tetraethylenepentamine

Claims (9)

A thermoplastic polyurethane composition without added diisocyanate, comprising butyl acrylate, methyl acrylate, acrylic acid, diaminodiphenylmethane, phthalic anhydride and 1,3,5-triacryloylhexahydro-1 ,3,5-triazine dispersions are mixed; among them, butyl acrylate, methyl acrylate and acrylic acid are added 10 to 50 parts by weight, 10 to 60 parts by weight, and 10 to 95 parts by weight, and 5 to 95 parts by weight 40 parts by weight of the solvent are mixed, and the use amounts of diaminodiphenylmethane, phthalic anhydride and 1,3,5-tripropenylhexahydro-1,3,5-triazine are 0.01 to 20, respectively. Parts by weight, and adding a weight ratio of 0.01 to 5 parts by weight of the initiator, and any one selected from the dispersion of tetraethylenepentamine, aminocyclohexane, m-xylene diamine and isophorone diamine and is It is obtained by mixing and reacting 0.01 to 5 parts by weight as an additive. In the thermoplastic polyurethane composition without added diisocyanate as described in item 1 of the scope of patent application, the amount of acrylic acid used is 90 parts by weight. The thermoplastic polyurethane composition without added diisocyanate as described in item 1 of the scope of patent application, wherein the solvent is methyl formate, ethyl formate, propyl formate, n-butyl formate, n-pentyl formate, isoformate Amyl ester, ethyl acetate, propyl acetate, butyl acetate, pentyl acetate or isoamyl acetate. The thermoplastic polyurethane composition without added diisocyanate as described in item 1 of the scope of patent application, wherein diaminodiphenylmethane, phthalic anhydride or 1,3,5-triacryloylhexahydro-1,3 The amount of 5-triazine used is 5 parts by weight. The thermoplastic polyurethane composition without added diisocyanate as described in item 1 of the scope of patent application, wherein the initiator is a photoinitiator or a thermal initiator. The thermoplastic polyurethane composition without added diisocyanate as described in item 1 of the scope of patent application, wherein the initiator is potassium persulfate, azobisisobutyronitrile or benzoin dimethyl ether. The thermoplastic polyurethane composition without added diisocyanate as described in item 1, 5 or 6 of the scope of patent application, wherein the use amount of the initiator is 0.5 parts by weight. A film prepared from the thermoplastic polyurethane composition without added diisocyanate as described in item 1 of the scope of patent application. A use of a thermoplastic polyurethane composition without added diisocyanate, which is composed of the thermoplastic polyurethane composition without added diisocyanate as described in item 1 of the scope of patent application, which is coated on a thermoplastic polyurethane film.

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