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Atactic amorphous copolyester as well as preparation method and application thereof

A technology of amorphous copolyester, applied in the field of amorphous copolyester

Active Publication Date: 2012-05-30
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, amorphous copolyesters are mainly copolyester polymers (also known as PETG) polymerized with 1,4-cyclohexanedimethanol (1,4-cyclohexanedimethanol) monomers from Eastman Kodak company in the United States. ) mainly, but currently cannot effectively shrink at higher temperatures, so the industry urgently needs a novel amorphous copolyester with a wide heat shrinkage temperature and its manufacturing method

Method used

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  • Atactic amorphous copolyester as well as preparation method and application thereof
  • Atactic amorphous copolyester as well as preparation method and application thereof
  • Atactic amorphous copolyester as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1, PETG x N y

[0043] The structural formula of this amorphous copolyester is shown in formula (II):

[0044]

[0045]

[0046] The amorphous copolyester of this embodiment is synthesized from two kinds of diacid monomers and two kinds of diol monomers, and the diacid monomers include terephthalic acid (TPA) and dimethyl 2,6-naphthalene dicarboxylate ( NDC); diol monomers include ethylene glycol (EG) and 1,3 / 1,4-cyclohexanedimethanol (1,3 / 1,4-CHDM) (Dow Chemical Company, UNOXOL TM 34 Diol). The molar percentages of terephthalic acid (TPA), dimethyl 2,6-naphthalene dicarboxylate (NDC), ethylene glycol (EG) and 1,3 / 1,4-cyclohexanedimethanol are shown in Table 1 . As can be seen from Table 1, the glass transition temperature of the copolyester can be changed by adjusting the content of 2,6-dimethyl naphthalene dicarboxylate, for example, the higher the content of 2,6-dimethyl naphthalene dicarboxylate, the higher the glass transition temperature. T...

Embodiment 2

[0057] Embodiment 2, PETG x S y

[0058] The structural formula of this amorphous copolyester is shown in formula (III):

[0059]

[0060] The amorphous copolyester of this embodiment is synthesized by two kinds of diacid monomers and two kinds of diol monomers, and diacid monomers comprise terephthalic acid (TPA) and succinic acid (SA); Including ethylene glycol (EG) and 1,3 / 1,4-cyclohexanedimethanol (1,3 / 1,4-CHDM) (Dow Chemical Company, UNOXOL TM 34 Diol), wherein the molar percentages of terephthalic acid (TPA), succinic acid (SA), ethylene glycol (EG) and 1,3 / 1,4-cyclohexanedimethanol are shown in Table 2. It can be seen from Table 2 that the glass transition temperature of the copolyester can be changed by adjusting the content of succinic acid, for example, the higher the content of succinic acid, the lower the glass transition temperature. The diacid monomer and the diol monomer are produced through two-stage esterification and polycondensation reaction, and a te...

Embodiment 3

[0071] Embodiment 3, shrinkage test

[0072] Cut the amorphous copolyesters of Examples 1 and 2 into appropriate sizes, extend them at 10-20°C higher than the glass transition temperature, and double the extension ratio, and place the extended amorphous copolyesters Calculate its shrinkage in ovens at different temperatures for five minutes, which is defined as:

[0073]

[0074] l is the length of the sample after oven treatment, l 0 is the original length of the sample

[0075] refer to figure 1 , Different concentrations of succinic acid and dimethyl 2,6-naphthalene dicarboxylate can change the shrinkage temperature of the amorphous copolyesters of Examples 1 and 2.

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Abstract

The invention provides an irregular amorphous copolymerized ester, which comprises diacid monomer and diol monomer, and has a structure shown as formula (I), wherein R1 and R2 are aromatic or aliphatic groups, A is 0 to 0.8, B is 0 to 0.8, C is 0 to 1, D is 0 to 1, E is 0 to 0.8, F is 0 to 0.8, wherein the sum of the C and the D is more than 0.2, and the sum of the A, the B, the E and the F is less than 0.8; wherein the diacid monomer comprises terephthalic acid and aromatic or aliphatic diacid monomer, and the diol monomer comprises glycol, 1, 3 / 1, 4-cyclohexane dimethanol and aromatic or aliphatic diol monomer, wherein the 1, 3 / 1, 4-cyclohexane dimethanol accounts for 20 to 100 mol percent in 100 mol percent of diol, the aromatic or aliphatic diacid monomer accounts for 0 to 100 mol percent in 100 mol percent of diacid, and the aromatic or aliphatic diol monomer accounts for 0 to 80 mol percent in 100 mol percent of diol.

Description

【Technical field】 [0001] The present invention relates to an amorphous copolyester, in particular to an amorphous copolyester with a broad glass transition temperature. 【Background technique】 [0002] Heat shrinkable film is widely used for labeling, protecting, bundling and wrapping glass, metal, ceramic or plastic bottles, boxes, containers and columns. For example, heat-shrinkable film can be used as a label for food or medicine, that is, for marking on plastic containers (such as beverage cans). Generally speaking, shrink films can be divided into two types: (1) biaxially oriented films used for packaging materials, which can shrink in the directions of x and y axes; Biaxially oriented film (unbiaxially oriented film), the non-biaxially oriented film itself can shrink in the stretching or compressing direction, and the shrinkage in the non-stretching or compressing direction is small. [0003] Although the shrink film can be made of materials such as polystyrene (OPS),...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/183C08G63/199C08G63/19C08G63/672C08G63/78B65D65/02
Inventor 洪启源范正欣蔡育勋蔡福裕
Owner IND TECH RES INST
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