High-molar-ratio environment-friendly phenolic resin glue and preparation method and application thereof

An environmentally friendly phenolic resin and phenolic resin adhesive technology, applied in the direction of adhesives, aldehyde/ketone condensation polymer adhesives, adhesive types, etc., can solve the physical and mental health injuries of production workers, incomplete reaction of phenol and formaldehyde, and production costs. Advanced problems, to achieve the effect of being conducive to environmental protection, large industrial application value, and thorough chemical reaction

Inactive Publication Date: 2016-11-16
福建和其昌竹业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are many differences between bamboo and wood in structure, performance and production process. Compared with wood, bamboo has high strength, high toughness, good wear resistance, high density, strong texture and color sense, and the production cycle of moso bamboo is short, and the source of raw materials is wide. , especially bamboo wood-based panels, after nearly ten years of development, has now become an emerging wood-based panel species in my country, playing an important role in national economic construction and people's lives, and the urea-formaldehyde resin used in wood-based panels, melamine modified Non-toxic urea-formaldehyde resin cannot meet the requirements of bamboo wood-based panel production, so most bamboo plywood factories, car floor panels, and container floor manufacturers use phenolic resin adhesives for bamboo gluing, and most of the production plants use phenolic resin with a low molar ratio. Glue (molar ratio P: F = 1: 2.0 or less, wherein P is Phenol, F is Formaldehyde), and it is produced by secondary feeding, which causes the addition of phenol and formaldehyde to react incompletely, resulting in high production costs and free phenol , high free aldehydes, serious environmental pollution, and some damage to the physical and mental health of production workers
In particular, the container bottom plate has higher requirements on the physical and mechanical properties of the plate than other plates. Its longitudinal static bending strength requires ≥ 85Mpa, elastic modulus ≥ 10000Mpa, and it is required that the molar ratio of phenolic resin glue should not be too high. Generally, most manufacturers use molar ratio P: F = 1: 1.8 or so phenolic resin glue for production, due to the high price of phenol, long-term use of this kind of glue invisible will cause the cost of glue to rise, and the high free phenol and free aldehyde during use will cause air pollution and affect workers Healthy body

Method used

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  • High-molar-ratio environment-friendly phenolic resin glue and preparation method and application thereof
  • High-molar-ratio environment-friendly phenolic resin glue and preparation method and application thereof
  • High-molar-ratio environment-friendly phenolic resin glue and preparation method and application thereof

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preparation example Construction

[0026] A preparation method of high molar ratio environmentally friendly phenolic resin glue includes the following steps:

[0027] (1) Weigh each component in parts by weight, take 55-65 parts by weight of 98% phenol as primary phenol and add it to the reactor, add 15.1-24.4 parts by weight of caustic soda, and then add 6-16 parts by weight Parts of process water and 1.0-10 parts by weight of coupling agent. When the temperature is lower than 50°C, 91-96 parts by weight of a 37% aqueous formaldehyde solution with a mass fraction of 37% are added as primary formaldehyde to the reactor;

[0028] (2) The reaction kettle is heated from below 50°C, and after 40-45 minutes, the temperature is raised to 90-95°C, and the temperature is kept at 90-95°C for 30 minutes;

[0029] (3) Cool the reactor with water to 70°C, take the remaining 98% phenol as the secondary phenol and add it to the reactor, and add the remaining caustic soda and all melamine;

[0030] (4) When the temperature is lower t...

Embodiment 1

[0034] A high molar ratio environmentally friendly phenolic resin adhesive prepared from the following components by weight:

[0035]

[0036] A preparation method of high molar ratio environmentally friendly phenolic resin glue includes the following steps:

[0037] (1) Weigh each component in parts by weight, take 55 parts by weight of 98% phenol as a primary phenol and add 19.8 parts by weight of caustic soda, then add 16 parts by weight of process water and 6.3 parts by weight. Parts by weight of polyisocyanate, when the temperature is lower than 50°C, take 96.0 parts by weight of a 37% aqueous formaldehyde solution as primary formaldehyde and add it to the reactor;

[0038] (2) Start the temperature of the reaction kettle from below 50°C, after 40 minutes, the temperature rises to 90°C, and keep the temperature at 90°C for 30 minutes;

[0039] (3) Cool the reactor with water to 70°C, take the remaining 98% phenol as the secondary phenol and add it to the reactor, and add the rema...

Embodiment 2

[0049] A high molar ratio environmentally friendly phenolic resin adhesive prepared from the following components by weight:

[0050]

[0051] A preparation method of high molar ratio environmentally friendly phenolic resin glue includes the following steps:

[0052] (1) Weigh each component in parts by weight, take 65 parts by weight of 98% phenol as a primary phenol and add 24.4 parts by weight of caustic soda, and then add 11 parts by weight of process water and 10 parts by weight. Parts by weight of the silicone coupling agent, when the temperature is lower than 50°C, take 91 parts by weight of a 37% aqueous formaldehyde solution as primary formaldehyde and add it to the reactor;

[0053] (2) The reaction kettle is heated from below 50°C, after 45 minutes, the temperature is raised to 95°C, and the reaction is kept at 95°C for 30 minutes;

[0054] (3) Cool the reactor with water to 70°C, take the remaining 98% phenol as the secondary phenol and add it to the reactor, and add the r...

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Abstract

The invention discloses a high molar ratio environment-friendly phenolic resin glue and its preparation method and application. The phenolic resin glue is prepared from the following components: phenol with a mass fraction of 98%, formaldehyde aqueous solution with a mass fraction of 37%, caustic soda, Process water, coupling agent, melamine. P:F=1:(2.18-2.25) of the present invention, the amount of formaldehyde added is higher than that of ordinary phenolic resin glue formula, which saves the amount of phenol and reduces the production cost; the preparation process makes phenol and formaldehyde go through multiple polycondensation The reaction is divided into three feedings, the chemical reaction is more thorough, and the curing temperature is lower, the amount of free formaldehyde and phenol in the phenolic resin glue is small, and no toxic substances are released during the preparation process, which is harmless to the human body and beneficial to environmental protection; the present invention The phenolic resin glue has great industrial application value.

Description

Technical field [0001] The invention relates to a high molar ratio environmentally friendly phenolic resin glue, and a preparation method and application thereof. Background technique [0002] There are many differences between bamboo and wood in structure, performance and production technology. Compared with wood, bamboo has high strength, high toughness, good wear resistance, high density, strong texture and color, and the production cycle of bamboo is short, and the source of raw materials is wide. , Especially the bamboo wood-based panel after nearly ten years of development, has now become a new type of wood-based panel in China, playing an important role in the national economic construction and people’s lives, and the wood-based panel uses urea-formaldehyde resin, melamine Polyurea resin cannot meet the requirements of bamboo wood-based panel production. Therefore, most bamboo plywood plants, automobile compartment floor panels, and container floor panel manufacturers use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G14/10C09J161/34
CPCC08G14/10C09J161/34
Inventor 郑忠福马昭明肖卫红俞艳罗显呈林上禄
Owner 福建和其昌竹业股份有限公司
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