Melamine-formaldehyde impregnating resin and preparing method thereof

A technology of melamine and impregnated resin, which is applied in the field of resin and its manufacture, can solve the problems of high production cost and high price of melamine-formaldehyde impregnated resin, and achieve the effects of saving resources and energy consumption, improving production efficiency and reducing costs

Active Publication Date: 2009-07-15

圣象实业(江苏)有限公司

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AI-Extracted Technical Summary

Problems solved by technology

Due to the high price of caprolactam, the production cos...

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Abstract

The invention discloses a melamine-formaldehyde dipping resin which consists of 34-45 percent of formaldehyde, 30-40 percent of melamine, 1-4 percent of diethylene glycol, 12-28 percent of purified water, 1-4 percent of modifying agent and sodium hydroxide according to weight percentage; the invention further discloses a preparation method of the melamine-formaldehyde dipping resin. Caprolactam is omitted in the raw material formulation; by changing the formulation of raw material composition, each performance index of the polymer resin, which is finally generated, meets each index requirement of the dipping resin; when the dipping resin is used for manufacturing laminated flooring, the detected performance indexes of the flooring also meet the quality index requirements. As the caprolactam is omitted in the raw material formulation, production cost is greatly saved and process steps are simplified.

Technology Topic

ChemistryDiethylene glycol +8

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Examples

Experimental program(5)

Example Embodiment

[0018] Example 1

[0019] Add 3500kg of purified water, 7500kg of formaldehyde, 600kg of diethylene glycol and 720kg of modifier into the reactor in turn, stir and add 7L of sodium hydroxide solution to adjust the pH to 9.23, then add 6800kg of melamine and stir for 10 minutes , Raise the temperature to 90.1°C within 30 minutes, control the system to react for 30 minutes at a temperature of 90.1°C and a pH value of 9.23, and then take a sample to detect the water-soluble multiple of the reaction solution. When the water-soluble multiple reaches 2.5, the temperature will drop quickly. When it falls below 30°C, adjust the pH to 8.92, then sample and discharge.

[0020] Various test results

[0021] Test items Quality Index Test results Exterior Colorless transparent liquid Colorless transparent liquid pH value 8.5-9.6 9.0

[0022] Viscosity (s/20℃) Tu 4# cup 15-25 18 Solid content (wt%) 45-60 56 Water soluble multiple (25℃) 1.5-2.5 1.9 Free formaldehyde (wt%) ≤0.3 0.3

[0023] Floor testing indicators:

[0024]

[0025]

Example Embodiment

[0026] Example 2

[0027] Add 3274kg of purified water, 6100kg of formaldehyde, 400kg of diethylene glycol and 600kg of modifier to the reactor in turn, stir and add 8L sodium hydroxide solution to adjust the pH to 9.5, then add 5426kg of melamine and stir for 10 minutes , Raise the temperature to 85°C within 40 minutes, control the system to react for 30 minutes at a temperature of 85°C and a pH of 9.5, and then take a sample to detect the water-soluble multiple of the reaction solution. When the water-soluble multiple reaches 1.7, the temperature will drop quickly. When it drops below 30°C, adjust the pH to 9.6, then sample and discharge.

[0028] Various test results

[0029] Test items Quality Index Test results Exterior Colorless transparent liquid Colorless transparent liquid pH value 8.5-9.6 9.5 Viscosity (s/20℃) Tu 4# cup 15-25 17 Solid content (wt%) 45-60 53.9 Water soluble multiple (25℃) 1.5-2.5 1.6 Free formaldehyde (wt%) ≤0.3 0.2

[0030] Floor testing indicators:

[0031]

[0032]

Example Embodiment

[0033] Example 3

[0034] Add 1990kg of purified water, 7290kg of formaldehyde, 324kg of diethylene glycol and 162kg of modifier into the reactor in turn, stir and add 7L of sodium hydroxide solution to adjust the pH to 9.26, then add 6434kg of melamine and stir for 10 minutes , Raise the temperature to 90.1°C within 30 minutes, control the system to react for 30 minutes at a temperature of 90.1°C and a pH value of 9.26, and then take a sample to detect the water-soluble multiple of the reaction solution. When the water-soluble multiple reaches 2.5, the temperature will drop quickly. When it drops below 30°C, adjust the pH to 8.97, then sample and discharge.

[0035] Various test results

[0036] Test items Quality Index Test results Exterior Colorless transparent liquid Colorless transparent liquid pH value 8.5-9.6 9.0 Viscosity (s/20℃) Tu 4# cup 15-25 18 Solid content (wt%) 45-60 59 Water soluble multiple (25℃) 1.5-2.5 1.9 Free formaldehyde (wt%) ≤0.3 0.3

[0037] Floor testing indicators:

[0038]

[0039]

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Description & Claims & Application Information

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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

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Classification and recommendation of technical efficacy words

Reduce manufacturing cost
The process steps are simple

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Melamine-formaldehyde impregnating resin and preparing method thereof

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

Example Embodiment

Example Embodiment

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Description & Claims & Application Information

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