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公开(公告)号：US4244906A
公开(公告)日：1981-01-13
申请号：US38613
申请日：1979-05-14
摘要： Phenol-aldehyde resins are prepared by condensing phenol with formaldehyde and isobutyraldehyde in the presence of an alkali. The resulting resins are particularly suited for manufacturing products such as fiberboard and chipboard.
摘要翻译： 酚醛树脂通过在碱存在下将苯酚与甲醛和异丁醛缩合而制备。 所得树脂特别适用于制造诸如纤维板和刨花板的产品。
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公开(公告)号：US4396787A
公开(公告)日：1983-08-02
申请号：US324331
申请日：1981-11-23
IPC分类号： B01J10/00 , B01J19/00 , B01J27/00 , C07B61/00 , C07C1/00 , C07C2/44 , C07C2/50 , C07C7/20 , C07C13/06 , C07C13/20 , C07C13/263 , C07C67/00 , C07C3/035
CPC分类号： C07C7/20 , B01J19/0013 , B01J19/002 , C07C2/44 , C07C2/50 , B01J2219/00063 , B01J2219/00065 , B01J2219/00094 , B01J2219/00159 , B01J2219/00182 , B01J2219/00186 , B01J2219/00252 , C07C2101/16
摘要： Formation of undesirable popcorn polymer on the walls of a reaction vessel during thermal dimerization of butadiene is prevented by coating the walls with a falling film of aqueous sodium nitrite solution.
摘要翻译： 通过用亚硝酸钠水溶液的降膜涂覆壁，防止在丁二烯的热二聚期间在反应容器的壁上形成不期望的爆米花聚合物。
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3.发明授权Molding compositions or masses suitable for manufacturing foundry molds and cores using the cold box method 失效适用于使用冷箱法制造铸造模具和型芯的成型组合物或质量
公开(公告)号：US4076683A
公开(公告)日：1978-02-28
申请号：US605111
申请日：1975-08-15
CPC分类号： C08G18/548 , B22C1/2273
摘要： Molding compositions or masses comprising sand and a two-component binder system are prepared. These two-component binders consist essentially of 1) polyisocyanate and 2) a low molecular weight polymethylol produced by the controlled condensation of narrow mole ratios of acetone and formaldehyde under alkaline reaction conditions followed by acidification and removal of sufficient water to produce a minimum solid content of at least 95%. These molding compositions cure so fast that they may be taken off the mold five minutes after having been cured with an amine curing agent, and reach a substantial bending strength within minutes of curing compared to prior art compositions which achieve comparable bending strength only after a period of as long as one hour.
摘要翻译： 制备包含砂和双组分粘合剂体系的成型组合物或质量。 这些双组分粘合剂基本上由1）多异氰酸酯和2）通过在碱性反应条件下由丙酮和甲醛的窄摩尔比控制缩合产生的低分子量多羟甲基，然后酸化并除去足够的水以产生最小的固含量 至少95％。 这些成型组合物固化得如此之快，使得它们可以在用胺固化剂固化5分钟后从模具中取出，并且在固化后几分钟内可以达到相当于弯曲强度的现有技术组合物，而现有技术的组合物仅在一段时间之后实现可比较的弯曲强度 长达一个小时。
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4.发明授权
公开(公告)号：US3949149A
公开(公告)日：1976-04-06
申请号：US534656
申请日：1974-12-19
CPC分类号： C08K5/109 , C08L97/02 , Y10T428/3196 , Y10T428/31989
摘要： Wood materials are prepared, characterised by improved resistance to hot water and by high weather resistance, by combining wood products with a phenol-aldehyde resin and alkylene carbonate hardener, the latter being incorporated in said resin as an aqueous formaldehyde solution.
摘要翻译： 通过将木制品与酚醛树脂和碳酸亚烷基碳酸酯固化剂组合，制备木质材料，其特征在于改善的耐热水性和耐高温性，后者作为甲醛水溶液掺入所述树脂中。
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