| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a chloroprene polymer latex excellent in the balance of temporal stability of flexibility and tensile strength and tensile elongation and useful as a raw material for expendable gloves for medical use etc. <P>SOLUTION: In this chloroprene polymer latex, the fraction of each monomer unit constituting the polymer, when the total of the monomer units is represented in 100 mass%, comprises 85-95 mass% chloroprene (A-1) and 15-5 mass% 2,3-dichloro-1,3-butadiene (A-2), or 77-95 mass% chloroprene (A-1), 15-5 mass% 2,3-dichloro-1,3-butadiene (A-2) and 0.2-13 mass% monomer (A-3)capable of copolymerizing with them, and the quantity of tetrahydrofuran insoluble in the polymer is 3-34 mass% and crystallization rate R äR represents the time required for the increase of hardness by 5 points from the initial (time=0) hardness measured at -10°C based on JIS K6253}, which is represented by the increase in the hardness at -10°C of the dried polymer, is not less than 200 hours. <P>COPYRIGHT: (C)2011,JPO&INPIT |
