Phenol formaldehyde resin and synthesis technique thereof

A phenolic resin, synthesis process technology, applied in the direction of aldehyde/ketone condensation polymer adhesives, adhesive types, adhesives, etc., can solve the problems of high curing temperature, long curing time, high toxicity, etc. Strong effect, low curing temperature and low toxicity

Inactive Publication Date: 2011-10-05
HUNAN FUXIANG WOOD
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing phenolic resin adhesives require a high curing temperature, above 140°C, a long curing time, high toxicity, and are limited in use.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take 100g of phenol, 130g of formaldehyde, 2g of sodium hydroxide, 15g of propanol, and 100g of water. Add the measured and melted phenol into the reactor and heat to 45°C; slowly add sodium hydroxide, and uniformly heat up to 70°C within 15 minutes; add formaldehyde and water, raise the temperature to 80°C within 15 minutes, and Keep at ℃ for 25 minutes; raise the temperature to 98 ℃ within 10 minutes, make it boil for 15 minutes, start sampling to measure the refractive index, when the refractive index reaches the requirement, it is the end point of condensation, start cooling, and start vacuum dehydration when the temperature drops to 70 ℃, dehydration The temperature is maintained at 50°C and the vacuum degree is 0.070MPa. When the viscosity of the resin reaches 700mPa·s, stop the dehydration, cool to 40°C, add the measured propanol, stir evenly and discharge the material.

Embodiment 2

[0021] Take 100g of phenol, 135g of formaldehyde, 2.2g of sodium hydroxide, 17g of propanol, and 110g of water. Add the measured and melted phenol into the reaction kettle and heat to 47°C; slowly add sodium hydroxide, and uniformly heat up to 70°C within 15 minutes; add formaldehyde and water, raise the temperature to 80°C within 15 minutes, and Keep at ℃ for 22 minutes; raise the temperature to 99 ℃ within 10 minutes, make it boil for 15 minutes, start sampling to measure the refractive index, when the refractive index meets the requirements, it is the end of condensation, start cooling, and start vacuum dehydration when the temperature drops to 70 ℃, dehydration The temperature is maintained at 55°C and the vacuum degree is 0.072MPa. When the viscosity of the resin reaches 700mPa·s, stop the dehydration, cool to 40°C, add the measured propanol, stir evenly and discharge the material.

Embodiment 3

[0023] Take 100g of phenol, 140g of formaldehyde, 2.5g of sodium hydroxide, 20g of propanol, and 120g of water. Add the measured and melted phenol into the reactor and heat to 50°C; slowly add sodium hydroxide, and uniformly heat up to 70°C within 15 minutes; add formaldehyde and water, raise the temperature to 80°C within 15 minutes, and Keep at ℃ for 20 minutes; raise the temperature to 100 ℃ within 10 minutes, make it boil for 15 minutes, start sampling to measure the refractive index, when the refractive index reaches the requirement, it is the end of condensation, start cooling, and start vacuum dehydration when the temperature drops to 70 ℃, dehydration The temperature is maintained at 60°C and the vacuum degree is 0.075MPa. When the viscosity of the resin reaches 700mPa·s, stop the dehydration, cool to 40°C, add the measured propanol, stir evenly and discharge the material.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a phenol formaldehyde resin and a synthesis technique thereof. The phenol formaldehyde resin comprises the following components: phenol, formaldehyde, sodium hydroxide, propanol and water. The synthesis technique of the phenol formaldehyde resin comprises the following steps: adding measured molten phenol into a reaction kettle, slowly adding sodium hydroxide, and adding formaldehyde and water; when the condensation ends as the refraction index satisfies the requirement, starting cooling; when the temperature drops to 70 DEG C, starting vacuum dehydration; when the viscosity of the resin reaches 700 mPa.s, stopping dehydration; and cooling to 40 DEG C, adding measured propanol, evenly stirring and discharging. The phenol formaldehyde resin prepared by the technique disclosed by the invention has the advantages of low curing temperature, high reaction speed and low toxicity.

Description

technical field [0001] The invention relates to a phenolic resin and a synthesis process. Background technique [0002] Phenolic resin adhesive is an important type of adhesive in the wood industry. Its dosage is second only to urea-formaldehyde resin adhesive. Its water resistance, aging resistance and heat resistance are better than UF glue, and its bonding strength is also high. It is used in Class I plywood and aviation plywood. , Ship panels, car panels, wood-laminated plastics and other products and structural wood-based panels, such as oriented strand board OSB, laminated veneer lumber LVL, etc. have a wide range of applications. However, the existing phenolic resin adhesive requires high curing temperature, above 140°C, long curing time, high toxicity, and is limited in use. Contents of the invention [0003] The object of the invention is to solve the problems in the prior art, thereby providing a synthesis process for the phenolic resin with low curing temperatu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(China)
IPC IPC(8): C08G8/10C09J161/10
Inventor陈海锋刘建新陈东辉
OwnerHUNAN FUXIANG WOOD