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Self-fixing phenol-free cashew nut shell oil resin and preparation method thereof

A technology of cashew nut shell oil resin and cashew nut shell oil, which is applied in the field of resin, can solve the problems of restricting the full utilization of cashew nut shell oil, difficulty in controlling the reaction process, and limiting the modification effect, so as to reduce the amount of formaldehyde released, stabilize product quality, reduce The effect of formaldehyde pollution

Active Publication Date: 2019-12-10
上海长风石棉五金厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, one application of cashew nut shell oil is to introduce cashew nut shell oil in the production of phenolic resin to improve the hardness and impact strength of phenolic resin. The problem is that with the increase of the amount of cashew nut shell oil, the viscosity of the whole reaction system increases rapidly. The reaction process is difficult to control, which limits its modification effect and the full utilization of cashew nut shell oil. At the same time, there is still the problem of phenol pollution in the production of modified phenolic resin

Method used

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  • Self-fixing phenol-free cashew nut shell oil resin and preparation method thereof

Examples

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preparation example Construction

[0024] The preparation method of this embodiment adopts a one-step production process, that is, after the raw material formula is determined, by controlling the process of the polycondensation reaction, the liquid cashew nut shell oil resin can be obtained, and the liquid cashew nut shell oil resin is an active intermediate product.

[0025] In one embodiment, the feeding process of the cashew nut shell liquid and urotropine is as follows: first, the cashew nut shell liquid is added into the reactor, and the temperature is raised to 30-50° C. under stirring, and then, the urotropine is added in batches In the reactor, the agglomeration phenomenon is prevented by one-time addition of urotropine, so that the urotropine is uniformly dissolved in the cashew nut shell oil, and stirred at 30-50° C. for 0.5-2 hours to obtain a liquid cashew nut shell oil resin. By controlling the reaction temperature at 30-50°C, it is possible to ensure that the reaction solution does not undergo dee...

Embodiment 1

[0036] This embodiment is used to prepare a block, flexible semi-solid self-curing cashew nut shell oil resin without phenol, which is mainly used as a wrapping clutch face adhesive, and its raw material is composed of the following components: 500g cashew nuts Shell oil, 45g urotropine, 0.068g silicone oil.

[0037] Its preparation method comprises the following steps:

[0038] 1) Add 500g of cashew nut shell oil weighed into the reactor, start the stirring device, and heat up to 35°C.

[0039] 2) Pulverize the agglomerated urotropine until it passes through a 40-mesh sieve, weigh it according to the formula, and set aside.

[0040] 3) Under stirring, slowly add 45g of urotropine weighed into the reactor in batches, after the addition is completed, add 0.068g of silicone oil weighed in advance and react at a constant temperature of 35°C for 2 hours to obtain liquid Cashew shell oleoresin.

[0041] 4) The main technical indicators of liquid cashew nut shell oleoresin are as...

Embodiment 2

[0050] This example is used to prepare a self-solidifying phenol-free cashew nut shell oil resin that can be processed into fine powder. It is mainly used in the production of dry-process molding compounds, wet-process fiberboards and other products. Its raw materials are composed of the following components: 500g Cashew nut shell liquid, 45g urotropine, 0.068g silicone oil.

[0051] Its preparation method comprises the following steps:

[0052] 1) Add 500g of cashew nut shell oil weighed into the reactor, start the stirring device, and heat up to 35°C.

[0053] 2) Pulverize the agglomerated urotropine until it passes through a 40-mesh sieve, weigh it according to the formula, and set aside.

[0054] 3) Under stirring, slowly add 45g of urotropine weighed into the reactor in batches, after the addition is completed, add 0.068g of silicone oil weighed in advance and react at a constant temperature of 35°C for 2 hours to obtain liquid Cashew shell oleoresin.

[0055] 4) The l...

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Abstract

The invention discloses self-solidified cashew nut shell oil resin containing no phenol and a preparation method of the self-solidified cashew nut shell oil resin containing no phenol. The preparation method of the self-solidified cashew nut shell oil resin containing no phenol comprises the following steps: (1) adding cashew nut shell oil and urotropine to a reactor, wherein the weight percentage of the cashew nut oil is 85% to 95%, and the weight percentage of urotropin is 5% to 15%, furthermore, according to requirements of the product, adding a defoamer to the reactor and stirring at a temperature of 30 to 50 DEG C to obtain the self-solidified liquid cashew nut shell oil resin containing no phenol. The cashew nut shell oil resin prepared by the preparation method can reduce phenol pollution and formaldehyde pollution. The liquid cashew nut shell oil resin is continuously heated, the reaction temperature and time are controlled, and the reaction degree is controlled, therefore, the self-solidified semisolid or ground solid cashew nut shell oil resin containing no phenol can be further obtained to expand the application range of the product. The preparation method is stronger in operability and favorable for large-scale production and stable product quality and the product is convenient to use.

Description

technical field [0001] The invention relates to the technical field of resins, in particular to a self-curing phenol-free cashew nut shell liquid resin and a preparation method thereof. Background technique [0002] Cashew nuts grown on trees are composed of cashew nut kernels and cashew nut shells, among which cashew nut kernels are a high-grade food, but only account for about 25% of the weight of cashew nuts, and the rest are cashew nut shells. For quite a long period of time, the utilization of cashew nut shells has not been paid enough attention. Due to its combustion-supporting effect, in some countries, cashew nut shells have been used as cheap fuel for a long time, or even discarded as garbage. [0003] With the advancement of technology, people have gradually discovered that cashew nut shells contain a large amount of cashew nut shell oil, which is a dark brown oily substance extracted from cashew nut shells, mainly including anacardic acid, cardol and cardanol. At...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/06C08G8/28
CPCC08G8/28C08G73/06
Inventor 潘继城时秀珍
Owner 上海长风石棉五金厂有限公司