Preparation method of furan-modified cashew phenolic resin

A technology of cardanol phenolic resin and cardanol, which is applied in the preparation field of furan-modified cardanol phenolic resin, can solve problems such as the inability to meet application requirements in boiling water resistance, and achieve excellent boiling water resistance, improved boiling water resistance, and superior heat resistance. Effect

Active Publication Date: 2015-03-11
天津市中海科技有限公司
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  • Abstract
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Problems solved by technology

Cardanol formaldehyde resin is the basis of cardanol modification, and it is mostly used in the fields of adhesives, friction materials, and ordinary coatings. However, it is used as a paint base in the field of industrial heavy-duty organic coatings in high-temperature water media, and its boiling water resistance is still not satisfactory. application requirements

Method used

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  • Preparation method of furan-modified cashew phenolic resin
  • Preparation method of furan-modified cashew phenolic resin
  • Preparation method of furan-modified cashew phenolic resin

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preparation example Construction

[0015] The design concept of the preparation method of the furan-modified cashew phenolic resin of the present invention is based on the fact that the furan ring of the furan-modified cashew phenolic resin has a heterocyclic structure with conjugated double bonds, and its performance is stable. As a structural unit of the condensation polymer, it can effectively improve Acid resistance, alkali resistance, solvent resistance and heat resistance of the resin. At the same time, the introduction of the furan ring increases the molecular weight of the polycondensate, and at the same time increases the distance between the hydroxymethylbenzene rings, reducing the steric hindrance of the methylol group in the further polycondensation process during thermal curing, so that the resin after thermal curing The cross-linking is more sufficient and the cross-linking density is higher, which promotes the formation of a network structure with high cross-linking density, and improves the perme...

Embodiment 1

[0030] Embodiment 1: (by weight part)

[0031] (1) The component proportions are: cardanol: 100 parts, formaldehyde: 32 parts, furfuryl alcohol: 10 parts, xylene: 80 parts, catalyst: zinc oxide 2 parts, ammonia water 6 parts.

[0032] (2) In the resin preparation process of the present invention, cardanol, formaldehyde, and catalyst are added in proportion to the reaction kettle, and reacted at 70°C-80°C for 1-2 hours; furfuryl alcohol is added, and reacted at 90°C-100°C for 1-2 hours; Then add 80-120 parts of xylene, heat up, and use an oil-water separation device to remove water until the temperature reaches 155-160°C and keep it for 1-2 hours to obtain the resin of the present invention.

Embodiment 2

[0033] Embodiment 2 (by weight):

[0034] (1) The proportions of the components in parts by weight are: cardanol: 140 parts, formaldehyde: 54 parts, furfuryl alcohol: 23 parts, xylene: 120 parts, catalyst: ammonia water 9 parts.

[0035] (2) The preparation method of this embodiment is the same as that of the embodiment (1).

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Abstract

The invention provides a preparation method of furan-modified cashew phenolic resin. The preparation method comprises the following steps of: selecting the following raw materials in parts by weight: 100-140 parts of cardanol, 32-54 parts of formaldehyde, 10-23 parts of furfuryl alcohol, 80-120 parts of dimethyl benzene and 8-10 parts of catalyst; adding the cardanol, the formaldehyde and the catalyst into a reaction kettle in proportion, reacting for 1 hour to 2 hours at 70 DEG C-80 DEG C; adding the furfuryl alcohol, and reacting for 1 hour to 2 hours at 90 DEG C-100 DEG C; adding the 80-120 parts of dimethyl benzene, heating up, separating the water by adopting an oil-water separating device until the temperature reaches 155 DEG C-160 DEG C, and performing heat preservation for 1 hour to 2 hours to obtain the furan-modified cashew phenolic resin. The preparation method of the furan-modified cashew phenolic resin has the beneficial effects of remarkably improving boiling water resistance and heat resistance of the resin, having a practical application meaning in corrosion resistance and scaling prevention of a distillation-process seawater desalting heat transfer tube as well as steam blowing resistance of a heat exchanger tube bundle of a petrifaction system, and being applicable to paint base preparation of industrial heavy-duty anticorrosive coating.

Description

technical field [0001] The invention relates to the technical field of synthetic resin preparation, in particular to a preparation method of furan-modified cashew nut phenolic resin. The resin is used as a paint base and can be used in the production of industrial heavy-duty anti-corrosion coatings. Background technique [0002] Cardanol is a natural product extracted from cashew nut shells, which is a renewable natural resource with low price. Cardanol is a derivative of phenol. The meta-position of the phenolic hydroxyl group contains long-chain unsaturated alkanes. As a raw material for synthetic resins, it can play an internal plasticizing role in the resin and increase the flexibility of the resin. Its application value has attracted more and more attention. . Cardanol formaldehyde resin is the basis of cardanol modification, and it is mostly used in the fields of adhesives, friction materials, and ordinary coatings. However, it is used as a paint base in the field of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G8/28
Inventor 黄鑫闫志山唐功文黄先群
Owner 天津市中海科技有限公司
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