Improvement of core-making technology was conducted by adopting basic phenolic resin sand for aluminum alloy air guide ring in the turbogenerator produced by Harbin Rlectric Machine Co.
介绍了我公司在应用碱性酚醛树脂砂工艺生产汽轮发电机铝合金铸件导风环的过程中，对制芯工艺进行的改进。
The title photosensitive phenolic epoxy acrylate resin has been prepared based on acrylic acid and F-44 epoxy resin as basic materials, which contains epoxy as well as acrylic groups.
本文以丙烯酸和F - 44环氧树脂为原料，合成了一种既含有环氧基又含有丙烯酸基的光敏酚醛环氧丙烯酸酯树脂。
A phenolic resin was synthesized from bisphenol a and aqueous formaldehyde in the presence of basic catalyst.
以双酚a，甲醛水溶液为原料，在碱性催化剂的作用下，合成双酚a型甲阶酚醛树脂。
They can be greatly reduced by acidic or basic polycondensation process, a certain amount of phenolic resin can also be recovered.
酚醛树脂生产废水含酚量和含醛量都较高，采用酸性缩聚法或碱性缩聚法处理，能大大降低酚和醛的含量，而且能回收到一定量的树。
They can be greatly reduced by acidic or basic polycondensation process, a certain amount of phenolic resin can also be recovered.
酚醛树脂生产废水含酚量和含醛量都较高，采用酸性缩聚法或碱性缩聚法处理，能大大降低酚和醛的含量，而且能回收到一定量的树。
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