Container for clean room
A container and clean room technology, applied in semiconductor/solid-state device manufacturing, electrical components, packaging, etc., can solve problems such as odor, clean room pollution, and non-use of ABS
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Synthetic example 1
[0064] 50 parts (solid content) of polybutadiene latex (weight average particle diameter 0.30 μm, gel content 85%), 150 parts of water, 0.1 part of disodium ethylenediaminetetraacetic acid were charged into the polymerization reactor after nitrogen substitution Salt, 0.001 parts of iron sulfate, 0.3 parts of sodium formaldehyde sulfoxylate, after heating to 60 ° C, continuously add 3 parts of acrylonitrile, 12 parts of styrene, 35 parts of methyl methacrylate and 0.2 parts of hydroperoxide for 3 hours. The mixture of cumene was further polymerized at 60° C. for 2 hours to obtain a graft copolymer latex. Afterwards, relative to 100 parts by weight (solid content) of this latex, use 3.0 parts by weight of magnesium sulfate as a salting out agent to carry out salting out, then add 1.5 times the volume of water of the graft copolymer resin particles and stir, dehydration washing, and then drying, Graft-copolymerized resin particles (1) were obtained.
Synthetic example 2
[0066] In Synthesis Example 1, graft copolymer resin particles were obtained in the same manner as in Synthesis Example 1, except for performing steam distillation after polymerization and changing the coagulation and washing steps. That is, steam was blown into the graft copolymer latex obtained after polymerization, and steam distillation was performed for 1 hour. At this time, the latex temperature was 80°C. After steam distillation, use 1.0 parts by weight of sulfuric acid to coagulate as a coagulant, then add 2.5 times the volume of water of the graft copolymer resin particles to stir, dehydrate, repeat the washing operation 3 times, except the above points, and synthesize In Example 1, graft copolymer resin particles (2) were obtained in the same manner.
Synthetic example 3
[0068] 130 parts of pure water and 0.3 parts of potassium persulfate were charged into the polymerization reactor after nitrogen substitution, and the temperature was raised to 65° C. while stirring. Then spend 4 hours to continuously add a mixed monomer solution containing 10 parts of acrylonitrile, 30 parts of styrene, 60 parts of methyl methacrylate and 0.35 parts of tert-dodecyl mercaptan, and 30 parts of 2 parts of disproportionated rosinic acid Potassium emulsifier aqueous solution. Thereafter, the temperature of the polymerization system was raised to 70° C., and aging was performed for 2 hours to obtain a styrene-based polymer latex. After that, with respect to 100 parts by weight (solid content) of this latex, use 2.5 parts by weight of magnesium sulfate as a salting out agent to carry out salting out, then add 1.5 times the volume of water of the styrene-based polymer and stir, dehydration washing, and then drying, Styrenic polymer (3) was obtained.
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