This standard is applicable to the determination of non-volatile components in various resin finishing agents. GB/T 5546-1985 Determination of non-volatile components in resin finishing agents GB/T5546-1985 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Determination of the nonyolatile content in resin finishing agentResin finishing agent
Determination of the nonyolatile contentThis standard applies to the determination of non-volatile components in various resin finishing agents. 1 Definition
UDC 678:044.33
：543.062
GB5546--85
The content of non-volatile components (solid and liquid) in resin finishing agent at a certain time and drying temperature. 2 Instruments and equipment
2.1 Analytical balance: sensitivity 0.1 mg.
2.2 Thermometer: glass thermometer with a temperature range of 0~150℃ and a graduation of 1℃. 2.3 Electric blast oven: sensitivity ±1℃. 2.4 Weighing bottle: diameter 60 mm, height 30 mm. 2.5 Dryer: with a tray, silica gel or anhydrous calcium chloride desiccant is placed underneath. 3 Determination Procedures
Weigh about 1 gram of sample (non-volatile components after drying are 0.4-0.5 grams, accurate to ±0.1 mg) and place it in a weighing bottle that has been dried and weighed, and add 5 ml of distilled water and gently rotate it by hand to fully mix the sample and water, and evenly distribute it on the bottom of the entire weighing bottle. Within 30 minutes, place it in the upper frame of an electric oven at 105±1℃, close to the glass ball of the thermometer, turn on the blower to keep the air circulating, and keep the temperature at 105±1℃ and dry for 3 hours. Take it out of the oven, cover the weighing bottle immediately, put it in a dryer to cool to room temperature, and weigh it (accurate to ±0.1 mg). 4 Calculation
Calculate the percentage of non-volatile components as follows: Non-volatile components %
Where: G1--Weighing bottle and sample mass, g, G2--Weighing bottle and sample mass after drying, g; A--Weighing bottle mass, g.
G,-A
G,-Ａbzxz.net
￥100
The relative error of three parallel determinations is not more than 1%, and the average value is taken as the result. Issued by the State Bureau of Standards on October 29, 1985
Implemented on August 1, 1986
Additional Notes:
GB5546-85
This standard was proposed by the Ministry of Chemical Industry of the People's Republic of China and is under the jurisdiction of the Shenyang Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard was drafted by the Dalian Light Chemical Industry Research Institute. The main drafter of this standard is Jin Liwen.
This standard adopts the American Society for Testing and Materials standard ASTMD1490--1967 (revised in 1978) "Standard method for determination of non-volatile components in urea-formaldehyde resin"
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