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Low-cost synthesis method of rosin modified phenolic resin

A technology of rosin modification and phenolic resin, which is applied in the field of synthesis of low-cost rosin modified phenolic resin, can solve the problems of poor quality and high cost, and achieve the effect of good quality, low cost and quality assurance

Pending Publication Date: 2018-10-19
新洲(武平)林化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The cost of existing rosin-modified phenolic resin is high, and the quality of low-cost rosin-modified phenolic resin is poor. For this reason, the present invention proposes a low-cost rosin-modified phenolic resin synthetic method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The low-cost synthesis method of rosin-modified phenolic resin proposed by the present invention includes the following steps:

[0020] S1: Weigh 4-n-propyl phenol and place it in a rapid reaction kettle. When 4-n-propyl phenol is solid, heat it until it melts; then add catalyst and formaldehyde, stir, and then react at 60°C for 2 hours. Prepare resole phenolic resin;

[0021] S2: Weigh the rosin, heat it until it melts, then add the resole phenolic resin prepared by S1, and react at 230°C for 6 hours;

[0022] S3: Weigh the vegetable oil, heat it to melt, then add it to S2, and react at 230°C for 6 hours;

[0023] S4: Add polyol to the mixture obtained by the S2 reaction. The added amount of polyol is 4% of the weight of rosin in S2. The esterification reaction is carried out at a temperature of 260°C. The reaction time is 11 hours, and then the low boiling point is removed under vacuum. Small molecule substance, rosin modified phenolic resin is prepared.

[0024] In the prese...

Embodiment 2

[0026] The low-cost synthesis method of rosin-modified phenolic resin proposed by the present invention includes the following steps:

[0027] S1: Weigh 4-n-propyl phenol and place it in a rapid reaction kettle. When 4-n-propyl phenol is solid, heat it until it melts; then add catalyst and formaldehyde, stir, and then react at 65°C for 2.5 hours. Prepare resole phenolic resin;

[0028] S2: Weigh the rosin, heat it until it melts, then add the resol phenolic resin prepared by S1, and react at 245°C for 7.5 hours;

[0029] S3: Weigh the vegetable oil, heat it to melt, then add it to S2, and react at 245°C for 7.5 hours;

[0030] S4: Add polyol to the mixture obtained by the S2 reaction. The added amount of polyol is 5% of the weight of rosin in S2. The esterification reaction is carried out at a temperature of 300°C. The reaction time is 15.5 hours, and then the low boiling point is removed under vacuum. Small molecule substance, rosin modified phenolic resin is prepared.

Embodiment 3

[0032] The low-cost synthesis method of rosin-modified phenolic resin proposed by the present invention includes the following steps:

[0033] S1: Weigh 4-n-propyl phenol and place it in a quick reaction kettle. When 4-n-propyl phenol is solid, heat it until it melts; then add catalyst and formaldehyde, stir, and then react at 70°C for 3 hours. Prepare resole phenolic resin;

[0034] S2: Weigh the rosin, heat it until it melts, then add the resole phenolic resin prepared by S1, and react at 260°C for 9 hours;

[0035] S3, weigh the vegetable oil, heat it until it melts, then add it to S2, and react at 260°C for 9 hours;

[0036] S4: Add polyol to the mixture obtained by the S2 reaction. The added amount of polyol is 6% of the weight of the rosin in S2. The esterification reaction is carried out at a temperature of 340°C. The reaction time is 20 hours, and then the low boiling point is removed under vacuum. Small molecule substance, rosin modified phenolic resin is prepared.

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Abstract

The invention discloses a low-cost synthesis method of rosin modified phenolic resin. The low-cost synthesis method comprises the following steps: weighing rosin and heating until the rosin is melted;then adding grade-A phenolic resin prepared by S1; reacting at 230 to 260 DEG C for 6 to 9 h; weighing vegetable oil and heating until the vegetable oil is melted; then adding the vegetable oil intoS2 and reacting at 230 to 260 DEG C for 6 to 9 h; adding polyol into a mixture obtained by S2, wherein the adding amount of the polyol is 4 to 6 percent of the weight of the rosin in S2; carrying outesterification reaction at the temperature of 260 to 340 DEG C, wherein the reaction time is 11 to 20 h; then removing a low-boiling-point small molecular substance in vacuum to obtain the rosin modified phenolic resin. The low-cost synthesis method disclosed by the invention has the advantages of reasonable design, proper method, low cost, good quality and high purity and is suitable for being popularized.

Description

Technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to a low-cost rosin-modified phenolic resin synthesis method. Background technique [0002] Rosin-modified phenolic resin is the best resin currently used in offset printing oils. It is based on alkylphenols (the phenols currently used in offset printing inks include phenol, bisphenol A, and PTBP. Tert-butyl phenol, POP p-tert-octyl phenol, PNP nonyl phenol and PDDP dodecyl phenol), formaldehyde, polyhydric alcohol and rosin are produced by chemical reactions. Due to its unique honeycomb structure characteristics, it has good pigment wetting performance, and at the same time it reacts with an appropriate gelling agent to obtain a certain viscoelastic binder, which is widely used in offset printing inks. Rosin-modified phenolic resin directly affects The gloss, dryness, water resistance, viscosity, rheology and printing performance of printing inks are currently used in offset...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/34C08G8/32
CPCC08G8/32C08G8/34
Inventor 朱志文
Owner 新洲(武平)林化有限公司
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