PBT resin with low dyne value and preparation method thereof

A technology of PBT resin and dyne value, which is applied in the field of PBT resin with low dyne value and its preparation, can solve the problems of high surface tension of PBT, difficult target separation, limited reduction effect, etc., and achieve reduction of surface crystal content, Effect of increasing reactivity and reducing crystallinity

Active Publication Date: 2022-01-28
上海日之升科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high surface tension of PBT, it is difficult to separate it from the target, which limits its application in the fields of thin films, especially PCB packaging.
The report about low dyne value PBT resin is less, as in CN105440604A, by adding the auxiliary agent of external lubricating class, such as: oxidized polyethylene wax, stearic acid ester, stearic acid amide etc., reduce the dyne value of PBT surface , but its reduction effect is limited, and there is a risk of precipitation when added in large quantities

Method used

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  • PBT resin with low dyne value and preparation method thereof
  • PBT resin with low dyne value and preparation method thereof
  • PBT resin with low dyne value and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A kind of PBT resin of low dyne value, comprises each component of following parts by weight:

[0040]

[0041] The preparation method of PBT resin is as follows:

[0042] (1) Weigh each component by weight ratio: polybutylene terephthalate (PBT), polypropylene GMA graft, crystallization inhibitor, catalyst.

[0043] (2) After each component in the step (1) is fully mixed through a high-speed mixer, extrude and granulate the PBT resin to obtain low dyne value by a twin-screw extruder; the rotating speed of the twin-screw extruder is 450 -600 rev / min, the temperature is 230-240°C.

[0044] The prepared PBT resin was injection molded into a standard test sample with a size of 10cm×10cm×2cm, and a mark was drawn on the sample with a dyne pen, and the dyne value of the sample was tested according to the shrinkage of the mark.

Embodiment 2

[0046] A kind of PBT resin of low dyne value, comprises each component of following parts by weight:

[0047]

[0048]

[0049] The preparation method is the same as in Example 1.

[0050] The prepared PBT resin was injection molded into a standard test sample with a size of 10cm×10cm×2cm, and a mark was drawn on the sample with a dyne pen, and the dyne value of the sample was tested according to the shrinkage of the mark.

Embodiment 3

[0052] A kind of PBT resin of low dyne value, comprises each component of following parts by weight:

[0053]

[0054] The preparation method is the same as in Example 1.

[0055] The prepared PBT resin was injection molded into a standard test sample with a size of 10cm×10cm×2cm, and a mark was drawn on the sample with a dyne pen, and the dyne value of the sample was tested according to the shrinkage of the mark.

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Abstract

The invention provides PBT resin with low dyne value and a preparation method thereof. The PBT resin with low dyne value comprises the following components in parts by weight: 100 parts of polybutylene terephthalate (PBT), 8 to 20 parts of a polypropylene GMA graft, 0.5 to 2 parts of a crystallization inhibitor, and 0.01 to 0.05 part of a catalyst. The preparation method of the PBT resin with low dyne value comprises the following steps: S1, weighing the following components in parts by weight: 100 parts of polybutylene terephthalate, 8 to 20 parts of the polypropylene GMA graft, 0.5 to 2 parts of the crystallization inhibitor and 0.01 to 0.05 part of the catalyst; and S2, fully and uniformly mixing the components in the step S1 by a high-speed mixer, extruding by a twin-screw extruder, and granulating to obtain the PBT resin with low dyne value. The dyne value of the low-dyne-value PBT resin is lower than 38, the precipitation risk is avoided, and the PBT resin can be applied to the fields needing low-dyne-value application such as PCB packaging.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a low dyne value PBT resin and a preparation method thereof. Background technique [0002] A printed circuit board (PCB for short) is formed on a general substrate according to a predetermined design. In the PCB production process, lamination (such as cover film, PI film, pure rubber steel sheet, etc.) usually uses a release film for protection and isolation. At present, the common silicone release film in the existing technology will produce different degrees of silicone oil transfer after high-temperature lamination, which is manifested by residual silicone oil or mist on the board surface, which will lead to a decrease in the peeling strength of the laminated surface in the subsequent process Not even up to standard. Non-silicon release materials are mainly TPX, PTFE and FEP, etc., but such release materials with low dyne value are too expensive and are not suitabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L51/06C08K5/159
CPCC08L67/02C08L51/06C08K5/159
Inventor 王尹杰申维新石景丽岳同健
Owner 上海日之升科技有限公司
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