共查询到18条相似文献,搜索用时 93 毫秒
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介绍了松香、改性松香及其衍生物在胶粘剂中的应用.应用于胶粘剂的松香有脂松香、未松香和浮油松香:改性松香包括它们的氢化、脱氢、歧化,聚合以及马来酸酐反应后的产物.松香衍生物包括松香和改性松香与各种醇反应生成的松香酯,氯化松香以及与其他物质的共聚物。松香及其衍生物在热熔胶和压敏胶中应用尤其广泛. 相似文献
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我国松香工业的未来展望 总被引:6,自引:2,他引:6
现今,随着世界松香生产格局的变化,我国已成为世界上松香最大生产国和世界脂松香市场的主要供应国。我国的松香其发展过程中,由于主产区经济的速发展,使得这种资源型、劳动劳改 型的产业已呈现出向松林资源较为、劳动力相对低谦的内地省份转移的趋势。正是这种转移有可能使我国今后仍将继续成为稳定世界松香关键的国家。现在我国松香工业正面临新的历史发展机遇。中国金龙松香集团的组建和有交秋我国松香工业的发展提供了企业组 相似文献
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松香催化酯化反应研究进展 总被引:34,自引:10,他引:24
综述了30年来松香催化酯化反应的研究进展,重点考察了反应使用的催化剂、反应条件以及产品性能,对进一步研究松香酯化改性具有指导意义,并有利于我国松香资源的充分利用。 相似文献
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介绍分散松香造纸施胶剂的制备工艺,分散松香胶pH值5-6,固体含量50%-55%,分散性好,造纸厂用分散松香比用普通松香,马来松香皂节约松香用量66.7%,37.5%。 相似文献
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本文介绍了美国松香的生产、利用和进出口情况,重点为80年代末美国浮油松香的生产及加工利用,并对我国发展浮油松香提出了两点看法。 相似文献
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中国松香工业概况 总被引:3,自引:1,他引:3
中国金龙松香集团公司 《林产化学与工业》2004,24(Z1):12-19
松香是一种具有重大经济价值的天然树脂.作为重要的化工原料,松香被广泛应用于造纸、胶粘剂、油漆涂料、油墨、橡胶、食品等工业.本文将通过阐述中国松香工业的历史、现状及发展前景,从宏观角度对中国松香工业作一个概述. 相似文献
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低频采脂技术对保护松林资源,减少资源破坏和浪费程度,提高劳动生产率提供技术支持。大力推广低频采脂技术是实现江西省松香产业可持续利用的有效途径之一。 相似文献
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Preparation and sizing mechanisms of neutral rosin size II: functions of rosin derivatives on sizing efficiency 总被引:1,自引:0,他引:1
Four rosin derivatives, including rosin esters and rosinamides, were synthesized and used to prepare neutral rosin sizes. Their effects during sizing are discussed in detail. Compared to natural rosin, the rosin derivatives had nearly no effect on sizing even at high retention levels in paper. However, the rosin derivatives in the rosin sizes improved the stability of the emulsion size particles, and there was good correlation between the sizing effect and the stability of the emulsion sizes under neutral to alkaline conditions. On the other hand, the structure of the rosin derivatives significantly influenced the stability and sizing effect of the neutral rosin sizes. In particular, for glycerin rosin ester-rosin sizes, the emulsion stability and sizing effect increased with an increasing proportion of dirosinate, among the glycerin rosin esters. Consequently, it was suggested that the rosin derivatives hardly contribute to the sizing performance of paper but predominantly function to stabilize the neutral rosin size particles, thereby improving the efficiency of the size under neutral to alkaline sizing conditions. Also it was supposed that glycerol dirosinate in the neutral rosin size would probably enable formation of a more stable particle structure to prevent the destructive action of the OH– ion.This research was presented in part at the 48th annual meeting of the Japan Wood Research Society, Shizuoka, April 1998 相似文献
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