公开(公告)号：US5891563A

公开(公告)日：1999-04-06

申请号：US727812

申请日：1996-10-08

申请人： John B. Letts

发明人： John B. Letts

IPC分类号： B32B5/18 ,  E04C2/296 ,  E04D3/35 ,  B32B17/10

CPC分类号： B29C44/326 ,  B32B5/18 ,  E04C2/296 ,  E04D3/352 ,  Y10T428/24347 ,  Y10T428/249953 ,  Y10T428/249955 ,  Y10T428/249956 ,  Y10T428/249986 ,  Y10T428/249987 ,  Y10T428/249989

摘要： A composite iso board (10) comprises a foam core (11) selected from the group consisting of polyisocyanurate and polyurethane materials and mixtures thereof; and first and second facers (12, 13), between which the foam core is sandwiched, the facers comprising a sheet selected from the group consisting of polyamides and polycarbonates. A method of reroofing a roof comprises applying composite iso boards of the present invention to a roof deck; and, applying a weather protective layer over the iso boards. A continuous method of making a composite iso board comprising the steps of feeding a first layer of facer material into a laminator (24); depositing a foamable polymer liquid onto the first layer (12); feeding a second layer of facer material (13) into the laminator above the foamable polymer liquid; allowing the polymer liquid to rise between the first and second facer materials forming polymer foam (42) of a predetermined thickness; curing the polymer foam under heat to create the iso board; cutting the iso board to desired lengths; and stacking said boards in bundles.

摘要翻译： 复合异质板（10）包括选自聚异氰脲酸酯和聚氨酯材料及其混合物的泡沫芯（11）; 和第一和第二平面（12,13）之间，其间夹着泡沫芯，所述平板包括选自聚酰胺和聚碳酸酯的片材。 屋顶的重新铺设方法包括将本发明的复合异质板施加到屋顶板上; 并在iso板上施加防护层。 一种制造复合等离子体板的连续方法，包括以下步骤：将第一层面材料进料到层压机（24）中; 将可发泡聚合物液体沉积到所述第一层（12）上; 将第二层面材料（13）进料到可发泡聚合物液体上方的层压机中; 允许聚合物液体在形成预定厚度的聚合物泡沫（42）的第一和第二面材料之间上升; 在加热下固化聚合物泡沫以产生异质板; 将iso板切割成所需的长度; 并将所述板堆叠在一起。

公开(公告)号：US4739122A

公开(公告)日：1988-04-19

申请号：US788930

申请日：1985-10-18

申请人： John B. Letts

发明人： John B. Letts

IPC分类号： C07C45/00 ,  C07C45/62 ,  C07C45/66 ,  C07C45/72 ,  C07C45/73 ,  C07C45/74 ,  C07C45/45

CPC分类号： C07C45/66 ,  C07C45/002 ,  C07C45/62 ,  C07C45/72 ,  C07C45/73 ,  C07C45/74 ,  Y02P20/584

摘要： A process to produce Methyl Amyl Ketone heterogeneously via the cross-aldol condensation reaction between a C.sub.3 (isopropanol or acetone feed) and a C.sub.4 (butanol or butyraldehyde feed). The catalyst, hydrogen reduced copper oxide on gamma alumina, produces both high reactivity and long catalyst lifetimes. The catalyst is successfully regenerated. Efficiencies to MAK range from 50 to 80 wt. % and efficiencies to useful products range from 75 to 95 wt. % depending on the composition of the feed and temperature. Temperatures range from 200.degree. to 262.degree. C.In general, this catalyst readily catalyzes the cross-aldol condensation reaction between aldehydes (or primary alcohols) and ketones (or secondary alcohols) to produce higher molecular weight ketones; likewise, this catalyst catalyzes the aldol condensation reaction between the same or different ketones to again produce higher molecular weight ketones.

摘要翻译： 通过C3（异丙醇或丙酮进料）和C4（丁醇或丁醛进料）之间的交叉醛醇缩合反应，异相生产甲基戊基酮的方法。 催化剂，氧化还原氧化铝在氧化铝上产生高反应性和长的催化剂寿命。 催化剂成功再生。 MAK的效率范围为50〜80wt。 ％和有效产品的效率为75至95wt。 ％取决于进料和温度的组成。 通常，该催化剂容易催化醛（或伯醇）和酮（或仲醇）之间的交换醛醇缩合反应以产生较高分子量的酮; 同样，该催化剂催化相同或不同酮之间的醛醇缩合反应，以再次产生较高分子量的酮。

公开(公告)号：US4490559A

公开(公告)日：1984-12-25

申请号：US593961

申请日：1984-03-27

申请人： Richard W. Wegman ,  John B. Letts

发明人： Richard W. Wegman ,  John B. Letts

IPC分类号： C07C45/49 ,  C07C45/41

CPC分类号： C07C45/49

摘要： Saturated aliphatic aldehydes are prepared by contacting diesters of carbonic acid with synthesis gas and a Group VIII compound, preferably a cobalt compound, a halogen, and optionally a Group V trivalent ligand.

摘要翻译： 通过使碳酸的二酯与合成气和第Ⅷ族化合物，优选钴化合物，卤素和任选的第V族三价配体接触来制备饱和脂族醛。