ASTM D1490-2001(2013) Standard Test Method for Nonvolatile Content of Urea-Formaldehyde Resin Solutions《脲甲醛树脂溶液中非挥发性物质含量的标准测试方法》.pdf
《ASTM D1490-2001(2013) Standard Test Method for Nonvolatile Content of Urea-Formaldehyde Resin Solutions《脲甲醛树脂溶液中非挥发性物质含量的标准测试方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D1490-2001(2013) Standard Test Method for Nonvolatile Content of Urea-Formaldehyde Resin Solutions《脲甲醛树脂溶液中非挥发性物质含量的标准测试方法》.pdf(2页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D1490 01 (Reapproved 2013)Standard Test Method forNonvolatile Content of Urea-Formaldehyde Resin Solutions1This standard is issued under the fixed designation D1490; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This test method covers the determination of the appar-ent nonvolatile content of urea-formaldehyde resin sol
3、utionsintended for use as wood adhesives. Due to the chemical natureof such resins, the nonvolatile content determined variesmarkedly according to the type of test used. In order tominimize this condition, this test method is designed to yieldreasonably uniform agreement among different laboratories
4、testing specimens from the same sample.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the
5、 user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D907 Terminology of Adhesives3. Terminology3.1 DefinitionsMany terms in this test method are definedin Termi
6、nology D907.4. Significance and Use4.1 Wood adhesive performance and cost is often related tothe solids level (nonvolatile content).4.2 This test method determines the apparent nonvolatilecontent for urea-formaldehyde resins.5. Apparatus5.1 Analytical Balance, accurate to 61.0 mg.5.2 ThermometerA gl
7、ass thermometer having a rangefrom 0 to 110 or 150C (32 to 230 or 302F) and accurate to61C (62F) at the required immersion.5.3 Constant-Temperature Oven, capable of maintaining atemperature of 105 6 1C (221 6 2F) and an air turnover of15 to 17 times per min. Use only one shelf for supporting thespec
8、imens. Position this shelf in the upper third of the oven, asnear one third from the ceiling as possible. Level the shelf towithin 0.025 mm from edge to edge in all directions. Place thethermometer bulb as close to the center of the shelf as possible.5.4 Tared Lunge Weighing Pipet, stoppered weighin
9、g bottle,or equivalent dispenser for accurately weighing by difference.5.5 Drying Dishesluminum foil dishes, with 57 to 58-mminside diameter and 17 mm deep, with flat bottoms, having atolerance of 60.076 mm.5.6 Desiccator, with tray, containing active anhydrous cal-cium chloride desiccant.6. Samplin
10、g6.1 Take a sufficient quantity of the resin lot being evaluatedto conduct the test. While the test consumes less than 10 g ofresin, a sample of approximately 0.23 L (12 pt) is suggested toensure that it is representative and will permit rechecks, ifnecessary. Record the lot number of the resin bein
11、g used.6.2 As urea-formaldehyde resin solutions have a varyingtendency toward mild settling or stratification, agitate the resinthoroughly before sampling, and mix the sample well before itis used in the test.7. Procedure7.1 Preparation of Test SpecimensPlace a portion of thesample in the weighing d
12、ispenser and weigh to 61.0 mg.Transfer a sufficient amount of the sample to yield 0.45 6 0.05g of dried residue, to a tared drying dish which has beenpreviously dried for1hat1056 1C (221 6 2F), and cooledand held in the desiccator until time of use. Reweigh thedispenser and determine, by difference
13、to 61.0 mg, the exactweight of the specimen transferred to the drying dish. Preparea total of three such specimens from the contents of theweighing dispenser. Pipet 5 mL (0.01 pt) of water into eachtared drying dish and mix the water and resin thoroughly bygently rotating the dish.1This test method
14、is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.30 on WoodAdhesives.Current edition approved May 1, 2013. Published May 2013. Originallyapproved in 1957. Last previous edition approved in 2006 as D1490 01 (2006).DOI: 10.1520/D1490-01R1
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