| 摘要 |
1,157,300. Cellulose graft polymers. M. IMOTO, K. TAKEMOTO and CHING YUN HUANG. 4 May, 1967 [11 May, 1966], No. 20737/67. Heading C3G. A graft polymerization process comprises heating in the liquid state at 40‹ to 100‹ C. a cellulose, at least one vinyl or vinylidene monomer and water in the absence of a polymerization catalyst and an emulsifying agent. The cellulose may be wood, leaf, stern, baste or seed fibre cellulose or pulp. The heating may be carried out under 1 to 10 atmospheres pressure (gauge). In the examples, needle-leaf tree pulp is grafted with methyl, ethyl, isobutyl or 2- ethoxyethyl methacrylate or methacrylic acid, or with a mixture of methyl methacrylate and ethyl, n-butyl, glycidyl, 2-diethylaminoethyl or 2-hydroxyethyl methacrylate, methacrylic acid, styrene, methyl or ethyl acrylate, acrylamide or a acrylonitrile, or with a mixture of ethyl methacrylate and methyl alpha-chloroacrylate, 2-ethylhexyl methacrylate, 2-diethylaminoethyl methacrylate, diethyleneglycol monomethacrylate glycidyl methacrylate, methacrylic acid, N-methylol acrylamide, ethyl vinyl ether, N-vinyl carbazole, methyl acrylate or vinyl chloride; cellulose pulp is grafted with methyl methacrylate and butadiene; cellulose is grafted with methyl methacrylate and styrene; hemp which has been treated with caustic soda is grafted with methyl methacrylate and glycidyl methacrylate and cotton is grafted with ethyl methacrylate and methacrylic acid.
|
