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Preparation method of polymerized rosin pentaerythritol ester for paint

A technology of rosin pentaerythritol ester and pentaerythritol ester, which is applied in the field of preparation of polymerized rosin pentaerythritol ester for coatings, can solve the problem of low softening point, achieve the effects of reducing production cost, reducing side reactions, and saving energy

Inactive Publication Date: 2017-05-10
广西梧州通轩林产化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of this invention is to provide a kind of preparation method of polymerized rosin pentaerythritol ester for coating, and the preparation method of this polymerized rosin pentaerythritol ester for coating can solve the problem of low softening point

Method used

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Comparison scheme
Effect test

Embodiment 1

[0014] The preparation method of polymerized rosin pentaerythritol ester for the coating of this embodiment is: add polymerized rosin, pentaerythritol ester and catalyst to the reactor, stir evenly, heat to react while polymerizing rosin while melting, within the first hour, the temperature in the reactor rises to 183°C to 188°C, from the 2nd hour to the 2.5th hour, the temperature in the reactor rose to 200°C to 207°C, from the 2.5th hour to the 3rd hour, the temperature in the reactor rose to 240°C to 247°C, keep the temperature constant Change, continue to react until polymerized rosin glyceride acid value (in terms of potassium hydroxide) is 16.4mg / g, and softening point stops reaction when being 133 ℃; Catalyst is zinc oxide;

[0015] The mass ratio of polymerized rosin, glycerin and catalyst is 1:0.1:0.01.

Embodiment 2

[0017] The preparation method of polymerized rosin pentaerythritol ester for the coating of this embodiment is: add polymerized rosin, pentaerythritol ester and catalyst to the reactor, stir evenly, heat to react while polymerizing rosin while melting, within the first hour, the temperature in the reactor rises to 183°C to 190°C, from the 2nd hour to the 2.5th hour, the temperature in the reactor rose to 227°C to 240°C, from the 2.5th hour to the 3rd hour, the temperature in the reactor rose to 240°C to 246°C, keep the temperature constant Change, continue to react until the polymerized rosin glyceric acid value (in terms of potassium hydroxide) is 16.2mg / g, and the softening point stops the reaction when it is 136°C; the catalyst is tungstogermanic acid;

[0018] The mass ratio of polymerized rosin, glycerin and catalyst is 1:0.15:0.015.

Embodiment 3

[0020] The preparation method of polymerized rosin pentaerythritol ester for the coating of this embodiment is: add polymerized rosin, pentaerythritol ester and catalyst to the reactor, stir evenly, heat to react while polymerizing rosin while melting, within the first hour, the temperature in the reactor rises to 180°C to 186°C, from the 2nd hour to the 2.5th hour, the temperature in the reactor rose to 200°C to 212°C, from the 2.5th hour to the 3rd hour, the temperature in the reactor rose to 243°C to 250°C, keep the temperature constant change, continue to react until the polymerized rosin glyceride acid value (in terms of potassium hydroxide) is 15.8mg / g, and the softening point stops the reaction when it is 136°C; the catalyst is zinc oxide;

[0021] The mass ratio of polymerized rosin, glycerin and catalyst is 1:0.13:0.02.

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Abstract

The invention discloses a preparation method of polymerized rosin pentaerythritol ester for paint, and relates to the technical field of deep processing of rosin. Polymerized rosin, pentaerythritol ester and a catalyst are added into a reaction vessel, heating is carried out, the polymerized rosin is melted and a reaction is carried out, heating is carried out sectionally, an esterification reaction is carried out till the polymerized rosin glyceride acid value (calculated by potassium hydroxide) is less than or equal to 17mg / g, and when the softening point is higher than or equal to 130 DEG C, the reaction stops. The softening point of the product is high than 130 DEG C.

Description

technical field [0001] The invention relates to the technical field of rosin deep processing, in particular to a preparation method of polymerized rosin pentaerythritol ester for coating. Background technique [0002] Polymerized rosin pentaerythritol ester has more oxidation resistance, better thermal stability, higher cohesion than polymerized rosin, suitable for more solvent viscosity, wide compatibility and solubility, and has higher softening point and lower acidity. Value and other characteristics, widely used in adhesives, paints and inks, and other polymer modifiers. Although polymerized rosin pentaerythritol ester has many advantages, its softening point still needs to be improved. Contents of the invention [0003] The purpose of the present invention is to provide a kind of preparation method of polymerized rosin pentaerythritol ester for coating, the preparation method of this polymerized rosin pentaerythritol ester for coating can solve the problem of low sof...

Claims

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Application Information

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IPC IPC(8): C09F1/04
CPCC09F1/04
Inventor 关炽昌
Owner 广西梧州通轩林产化学有限公司
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