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    Method of making thermally removable polyurethanes
    3.
    发明授权
    Method of making thermally removable polyurethanes 有权
    制造热可去除的聚氨酯的方法

    公开(公告)号：US06403753B1

    公开(公告)日：2002-06-11

    申请号：US09863173

    申请日：2001-05-22

    申请人： Douglas A. Loy ,  David R. Wheeler ,  James R. McElhanon ,  Randall S. Saunders

    发明人： Douglas A. Loy ,  David R. Wheeler ,  James R. McElhanon ,  Randall S. Saunders

    IPC分类号： C08G1862

    CPC分类号： C08G18/6765

    摘要： A method of making a thermally-removable polyurethane material by heating a mixture of a maleimide compound and a furan compound, and introducing alcohol and isocyanate functional groups, where the alcohol group and the isocyanate group reacts to form the urethane linkages and the furan compound and the maleimide compound react to form the thermally weak Diels-Alder adducts that are incorporated into the backbone of the urethane linkages during the formation of the polyurethane material at temperatures from above room temperature to less than approximately 90° C. The polyurethane material can be easily removed within approximately an hour by heating to temperatures greater than approximately 90° C. in a polar solvent. The polyurethane material can be used in protecting electronic components that may require subsequent removal of the solid material for component repair, modification or quality control.

    摘要翻译： 通过加热马来酰亚胺化合物和呋喃化合物的混合物并引入醇和异氰酸酯官能团来制备热可去除的聚氨酯材料的方法，其中醇基和异氰酸酯基团反应形成氨基甲酸酯键和呋喃化合物， 马来酰亚胺化合物在高于室温至小于约90℃的温度下，在形成聚氨酯材料期间反应形成加入了弱的Diels-Alder加合物，其加入聚氨酯键的主链中。聚氨酯材料可以容易地 在大约1小时内通过在极性溶剂中加热至大于约90℃的温度来除去。 聚氨酯材料可用于保护可能需要随后去除固体材料的电子部件，用于部件修理，修改或质量控制。

    Polyimide foam precursor and its use in reinforcing open-cell materials
    4.
    发明授权
    Polyimide foam precursor and its use in reinforcing open-cell materials 失效

    公开(公告)号：US4830883A

    公开(公告)日：1989-05-16

    申请号：US209757

    申请日：1988-06-22

    申请人： Kyu W. Lee

    发明人： Kyu W. Lee

    IPC分类号： C08G18/34 ,  C08G18/67 ,  C08G18/81 ,  C08J9/02

    CPC分类号： C08J9/02 ,  C08G18/346 ,  C08G18/674 ,  C08G18/6765 ,  C08G18/8183 ,  B29K2079/00 ,  C08J2379/08

    摘要： Open-cell structures are filled with polyimide foam formed in place by the use of a foam precursor in powdered form comprised of a combination of (a) the reaction product of an excess of organic polyisocyanate and a member selected from the group consisting of furfuryl alcohol and condensation products thereof, and (b) an organic polycarboxylic compound containing two carboxylic anhydride groups. The precursor is prepared by combining the species under conditions which favor the reaction of the furfuryl alcohol with the polyisocyanate, but not the polyimide-forming reaction. The polyimide-forming reaction itself is then performed by adding preselected amounts of the powdered precursor, depending on the desired ultimate density of the foam, to each cell of the open-cell structure, then heating to initiate the polyimide reaction, and permitting the carbon dioxide generated by the reaction to escape while confining the resulting foam to the cells.

    Thereof as polyols in the formation of polyurethanes, polyurethanes etc.
    6.
    发明授权
    Thereof as polyols in the formation of polyurethanes, polyurethanes etc. 失效
    作为聚氨酯，聚氨酯等的形成中的多元醇

    公开(公告)号：US5091495A

    公开(公告)日：1992-02-25

    申请号：US580152

    申请日：1990-09-10

    申请人： Gabriel Roux ,  Janine Rivero ,  Alessandro Gandini

    发明人： Gabriel Roux ,  Janine Rivero ,  Alessandro Gandini

    IPC分类号： C07D307/42 ,  C07D307/46 ,  C07D307/68 ,  C08G18/67

    CPC分类号： C07D307/42 ,  C07D307/46 ,  C07D307/68 ,  C08G18/6765 ,  C08G2105/02

    摘要： This invention relates to novel furan polyols, which are characterized in that they are the product of reaction of a strain selected from the group or consisting of a polyalcohol, a monoamine or polyamine, said polyalcohol or said amine possibly containing a furan cycle and mixtures thereof with a chain extension agent constituted by an organic epoxide, with the proviso that this organic epoxide is a furannic oxiran when this polyalcohol does not contain a furan cycle with the exclusion of 2,5(bis-hydroxy)furan as sole strain, when the chain extension agent does not contain any furan cycle. These furan polyols are used for the preparation of polyurethane foams having improved properties.

    摘要翻译： 本发明涉及新的呋喃多元醇，其特征在于它们是选自下组的一种或多种醇，单胺或多胺，所述多元醇或可能含有呋喃循环的胺的混合物或其混合物的反应产物 具有由有机环氧化物构成的扩链剂，条件是当该多元醇不包含不包括2,5（双羟基）呋喃作为唯一菌株的呋喃循环时，该有机环氧化物是呋喃基环氧乙烷，当 链延长剂不含任何呋喃循环。 这些呋喃多元醇用于制备具有改进性能的聚氨酯泡沫体。

    Polyimide foam precursor and its use in reinforcing open-cell materials
    7.
    发明授权
    Polyimide foam precursor and its use in reinforcing open-cell materials 失效

    公开(公告)号：US4806573A

    公开(公告)日：1989-02-21

    申请号：US209760

    申请日：1988-06-22

    申请人： Kyu W. Lee

    发明人： Kyu W. Lee

    IPC分类号： C08G18/34 ,  C08G18/67 ,  C08G18/81 ,  C08J9/02 ,  C08J9/00

    CPC分类号： C08J9/02 ,  C08G18/346 ,  C08G18/674 ,  C08G18/6765 ,  C08G18/8183 ,  B29K2079/00 ,  C08J2379/08

    摘要： Open-cell structures are filled with polyimide foam formed in place by the use of a foam precursor in powdered form comprised of a combination of (a) the reaction product of an excess of organic polyisocyanate and a member selected from the group consisting of furfuryl alcohol and condensation products thereof, and (b) an organic polycarboxylic compound containing two carboxylic anhydride groups. The precursor is prepared by combining the species under conditions which favor the reaction of the furfuryl alcohol with the polyisocyanate, but not the polyimide-forming reaction. The polyimide-forming reaction itself is then performed by adding preselected amounts of the powdered precursor, depending on the desired ultimate density of the foam, to each cell of the open-cell structure, then heating to initiate the polyimide reaction, and permitting the carbon dioxide generated by the reaction to escape while confining the resulting foam to the cells.

    Chemical compositions and methods
    8.
    发明授权
    Chemical compositions and methods 失效
    化学成分和方法

    公开(公告)号：US4548752A

    公开(公告)日：1985-10-22

    申请号：US535252

    申请日：1983-11-14

    申请人： William J. Pentz

    发明人： William J. Pentz

    IPC分类号： C08G18/67 ,  C08G18/79 ,  C08G18/14

    CPC分类号： C08G18/791 ,  C08G18/6765 ,  C08G18/6795

    摘要： Improved rigid urethane and isocyanurate foam compositions having improved fire resistance are described. The urethane foams are based on furan compositions and are chiefly made from adding propylene oxide to bis(hydroxymethyl)furan.

    摘要翻译： 描述了具有改进的耐火性的改进的刚性聚氨酯和异氰脲酸酯泡沫组合物。 聚氨酯泡沫以呋喃组成为基础，主要由二氧化丙烯加成环氧丙烷制成。