HIGH MELT STRENGTH POLYESTER RESIN COMPOSITION AND MANUFACTURING METHOD THEREOF

Abstract

The disclosure provides a high melt strength polyester resin composition and a manufacturing method thereof. The high melt strength polyester resin composition includes a polyester resin, a polyolefin resin, a chain extender, an antioxidant, and a phosphorus compound stabilizer. A melting point of the polyester resin is 150° C. to 200° C.

Claims

1. A polyester resin composition, comprising: a polyester resin with a melting point of 150° C. to 200° C.; a polyolefin resin; a chain extender; an antioxidant; and a phosphorus compound stabilizer.

2. The polyester resin composition according to claim 1, wherein the chain extender comprises dianhydrides and polyepoxides of tetracarboxylic aromatic hydrocarbons, polycarboxylic aromatic hydrocarbons, or fatty acids.

3. The polyester resin composition according to claim 1, wherein the antioxidant comprises a hindered phenol antioxidant or a phosphite antioxidant.

4. The polyester resin composition according to claim 1, wherein based on a total weight of a content of the polyester resin composition calculated as 100 wt %, a content of the polyester resin is 30 wt % to 93.8 wt %, a content of the polyolefin resin is 5 wt % to 68.8 wt %, a content of the chain extender is 1 wt % to 20 wt %, a content of the antioxidant is 0.1 wt % to 3 wt %, and a content of the phosphorus compound stabilizer is 0.1 wt % to 1 wt %.

5. A manufacturing method of a polyester resin composition, comprising: uniformly mixing a polyester resin, a polyolefin resin, a chain extender, an antioxidant, and a phosphorus compound stabilizer to be processed into a masterbatch by a kneader, wherein a melting point of the polyester resin is 150° C. to 200° C.

6. The manufacturing method of the polyester resin composition according to claim 5, wherein a processing temperature of the kneader is 150° C. to 200° C.

7. The manufacturing method of the polyester resin composition according to claim 5, wherein the chain extender comprises dianhydrides and polyepoxides of tetracarboxylic aromatic hydrocarbons, polycarboxylic aromatic hydrocarbons, or fatty acids.

8. The manufacturing method of the polyester resin composition according to claim 5, wherein the antioxidant comprises a hindered phenol antioxidant or a phosphite antioxidant.

9. The manufacturing method of the polyester resin composition according to claim 5, wherein based on a total weight of a total usage amount of each component calculated as 100 wt %, an additive amount of the polyester resin is 30 wt % to 93.8 wt %, an additive amount of the polyolefin resin is 5 wt % to 68.8 wt %, an additive amount of the chain extender is 1 wt % to 20 wt %, an additive amount of the antioxidant is 0.1 wt % to 3 wt %, and an additive amount of the phosphorus compound stabilizer is 0.1 wt % to 1 wt %.

Description

DETAILED DESCRIPTION OF DISCLOSED EMBODIMENTS

[0016] Hereinafter, embodiments of the disclosure will be described in detail. However, these embodiments are illustrative, and the disclosure is not limited thereto.

[0017] In the present specification, a range represented by “a numerical value to another numerical value” is a schematic representation for avoiding listing all of the numerical values in the range in the specification. Therefore, the recitation of a specific numerical range covers any numerical value in the numerical range and a smaller numerical range defined by any numerical value in the numerical range, as is the case with any numerical value and a smaller numerical range thereof in the specification.

[0018] The disclosure provides a high melt strength polyester resin composition, which includes a polyester resin, a polyolefin resin, a chain extender, an antioxidant, and a phosphorus compound stabilizer. In this embodiment, a melting point of the polyester resin is, for example, 150° C. to 200° C. Therefore, the polyester resin used in the disclosure is preferably, for example, the polyester resin with a low melting point. The chain extender may include dianhydrides and polyepoxides of tetracarboxylic aromatic hydrocarbons, polycarboxylic aromatic hydrocarbons, or fatty acids. The antioxidant may include a hindered phenol antioxidant or a phosphite antioxidant. The phosphorus compound stabilizer may include triphenyl phosphite or triethylene phosphorothioate.

[0019] In this embodiment, based on a total weight of a content of the polyester resin composition, for example, calculated as 100 wt %, a content of the polyester resin is, for example, 30 wt % to 93.8 wt %; a content of the polyolefin resin is, for example, 5 wt % to 68.8 wt %. %; a content of the chain extender is, for example, 1 wt % to 20 wt %; a content of the antioxidant is, for example, 0.1 wt % to 3 wt %, and a content of the phosphorus compound stabilizer is, for example, 0.1 wt % to 1 wt %.

[0020] The disclosure also provides a manufacturing method of the polyester resin composition, which includes the following steps. The polyester resin, the polyolefin resin, the chain extender, the antioxidant, and the phosphorus compound stabilizer are uniformly mixed, and then processed into a foamed chain extender masterbatch by a kneader. In this embodiment, a processing temperature of the kneader is preferably, for example, 150° C. to 200° C.

[0021] In this embodiment, based on a total weight of a total usage amount of each component, for example, calculated as 100 wt %, an additive amount of the polyester resin is, for example, 30 wt % to 93.8 wt %; an additive amount of the polyolefin resin is, for example, 5 wt % to 68.8 wt %. %; an additive amount of the chain extender is, for example, 1 wt % to 20 wt %; an additive amount of the antioxidant is, for example, 0.1 wt % to 3 wt %, and an additive amount of the phosphorus compound stabilizer is, for example, 0.1 wt % to 1 wt %.

[0022] Hereinafter, the high melt strength polyester resin composition and the manufacturing method thereof according to the disclosure is described below in detail by way of experimental examples. However, the following experimental examples are not intended to limit the disclosure.

Experimental Example

[0023] In order to verify that the high melt strength polyester resin composition and the manufacturing method thereof according to the disclosure are helpful for a subsequent foaming process, the experimental examples are provided as follows.

Example 1

[0024] A mixture of the polyester resin of 78.5 wt %, the polyolefin resin of 10 wt %, the chain extender of 10 wt %, the antioxidant of 1 wt %, and the phosphorus compound stabilizer of 0.5 wt % is uniformly mixed with a mixer, and then processed by the kneader to be granulated.

[0025] Processing conditions of the kneader: [0026] The rotor speed: 60 rpm [0027] The processing temperature: [0028] The zone 1: 150° C. [0029] The Zone 2: 170° C. [0030] The zone 3: 170° C. [0031] The processing time: 10 minutes

Example 2

[0032] The processing is performed in the same manner as in Example 1. However, a proportion of the chain extender is increased to 20 wt %, and a proportion of the polyester resin is reduced to 68.5 wt %.

Example 3

[0033] The processing is performed in the same manner as in Example 1. However, a proportion of the polyolefin resin is increased to 30 wt %.

Comparative Example 1

[0034] The processing is performed in the same manner as in Example 1. However, the polyolefin resin is not used, and the polyester resin is 78.5 wt %.

[0035] Composition ratios of Examples 1 to 3 and Comparative Example 1 as well as the density and average cell size after foaming applied to the subsequent foaming process are shown in Table 1 below. Referring to Table 1, the high melt strength polyester resin composition according to the disclosure are used in Examples 1 to 3, which is helpful for the subsequent foaming process. In contrast, the polyolefin resin is not used in Comparative Example 1. Therefore, a discontinuous phase may not be formed in the masterbatch, so the technical effect of the disclosure that is helpful for dispersion of the chain extender may not be achieved, which is not helpful for the subsequent foaming process.

TABLE-US-00001 Comparative Example example Composition (wt %) 1 2 3 1 The polyester resin 78.5 68.5 58.5 78.5 The polyolefin resin 10 10 30 0 The chain extender 10 20 10 20 The antioxidant 1 1 1 1 The phosphorus compound 0.5 0.5 0.5 0.5 stabilizer applied to the subsequent foaming process The density after foaming 0.135 0.127 0.129 0.288 (g/cm.sup.3) The average cell size 93 88 81 151

[0036] Based on the above, the high melt strength polyester resin composition in the disclosure includes the polyolefin resin. Therefore, the discontinuous phase may be formed in the masterbatch to facilitate the dispersion of the chain extender and further contribute to the subsequent foaming process. On the other hand, the manufacturing method of the polyester resin composition in the disclosure lowers the processing temperature (150° C. to 200° C.), so that the chain extender may be processed without sublimation. In this way, the high melt strength polyester resin composition and the manufacturing method thereof in the disclosure may effectively solve the issue of the melt strength of PET.