公开(公告)号：US5990268A

公开(公告)日：1999-11-23

申请号：US754746

申请日：1996-11-21

申请人： Elmer Douglas Dickens, Jr. ,  Biing Lin Lee ,  Glenn Alfred Taylor ,  Angelo Joseph Magistro ,  Hendra Ng

发明人： Elmer Douglas Dickens, Jr. ,  Biing Lin Lee ,  Glenn Alfred Taylor ,  Angelo Joseph Magistro ,  Hendra Ng

IPC分类号： B29C35/08 ,  B29C41/00 ,  B29C67/00 ,  B29C67/04 ,  C08G69/14 ,  C08J3/12 ,  C08J9/24

CPC分类号： B29C67/0077 ,  B29C41/003 ,  B29C67/04 ,  C08J3/12 ,  C08J9/24 ,  B29C2035/0838 ,  B29K2023/00 ,  B29K2023/06 ,  B29K2023/12 ,  B29K2059/00 ,  B29K2067/006 ,  B29K2077/00 ,  B29K2079/00 ,  B29K2995/0094 ,  Y10S521/919 ,  Y10T428/249958

摘要： A laser-sinterable powder product has been prepared having unique properties which allow the powder to be sintered in a selective laser sintering machine to form a sintered part which is near-fully dense. For most purposes, the sintered part is indistinguishable from another part having the same dimensions made by isotropically molding the powder. In addition to being freely flowable at a temperature near its softening temperature, a useful powder is disclosed that has a two-tier distribution in which substantially no primary particles have an average diameter greater than 180 .mu.m, provided further that the number average ratio of particles smaller than 53 .mu.m is greater than 80%, the remaining larger particles being in the size range from 53 .mu.m to 180 .mu.m. A powder with slow recrystallization rates, as evidenced by non-overlapping endothermic and exothermic peaks in their differential scanning calorimetry characteristics for scan rates of on the order of 10.degree. C. to 20.degree. C. per minute, will also result in sintered parts that are near-fully dense, with minimal dimensional distortion.

摘要翻译： 已经制备了具有独特性质的激光可烧结粉末产品，其允许粉末在选择性激光烧结机中烧结以形成接近完全致密的烧结部分。 对于大多数目的，烧结部分与通过各向同性地成型粉末制成的具有相同尺寸的另一部件是不可区分的。 除了在接近其软化温度的温度下可自由流动外，还公开了一种有用的粉末，其具有两层分布，其中基本上没有一次颗粒的平均直径大于180μm，条件是， 小于53μm的颗粒大于80％，剩余的较大颗粒的尺寸范围为53μm至180μm。 具有缓慢重结晶速率的粉末，其扫描速率在每分钟10℃至20℃的差示扫描量热法特征中不重叠的吸热和放热峰所证明的也将导致烧结部分 几乎完全密集，具有最小的尺寸变形。

公开(公告)号：USRE39354E1

公开(公告)日：2006-10-17

申请号：US10282191

申请日：2002-10-24

申请人： Elmer Douglas Dickens, Jr. ,  Biing-Lin Lee ,  Glenn Alfred Taylor ,  Angelo Joseph Magistro ,  Hendra Ng ,  Kevin P. McAlea ,  Paul F. Forderhase

发明人： Elmer Douglas Dickens, Jr. ,  Biing-Lin Lee ,  Glenn Alfred Taylor ,  Angelo Joseph Magistro ,  Hendra Ng ,  Kevin P. McAlea ,  Paul F. Forderhase

IPC分类号： C08G69/14

CPC分类号： C08J9/24 ,  B29C41/003 ,  B29C64/153 ,  B29C67/04 ,  B29C2035/0838 ,  B29K2023/00 ,  B29K2023/06 ,  B29K2023/12 ,  B29K2059/00 ,  B29K2067/006 ,  B29K2077/00 ,  B29K2079/00 ,  B29K2995/0094 ,  B33Y10/00 ,  B33Y70/00 ,  C08J3/12 ,  Y10S521/919 ,  Y10T428/249958

摘要： A laser-sinterable powder product has been prepared having unique properties which allow the powder to be sintered in a selective laser sintering machine to form a sintered part which is near-fully dense. For most purposes, the sintered part is indistinguishable from another part having the same dimensions made by isotropically molding the powder. In addition to being freely flowable at a temperature near its softening temperature, a useful powder is disclosed that has a two-tier distribution in which substantially no primary particles have an average diameter greater than 180 μm, provided further that the number average ratio of particles smaller than 53 μm is greater than 80%, the remaining larger particles being in the size range from 53 μm to 180 μm. A powder with slow recrystallization rates, as evidenced by non-overlapping or slightly overlapping endothermic and exothermic peaks in their differential scanning calorimetry characteristics for scan rates of on the order of 10° C. to 20° C. per minute, will also result in sintered parts that are near-fully dense, with minimal dimensional distortion.

摘要翻译： 已经制备了具有独特性质的激光可烧结粉末产品，其允许粉末在选择性激光烧结机中烧结以形成接近完全致密的烧结部分。 对于大多数目的，烧结部分与通过各向同性地成型粉末制成的具有相同尺寸的另一部件是不可区分的。 除了在接近其软化温度的温度下可自由流动外，还公开了一种有用的粉末，其具有两层分布，其中基本上没有一次颗粒的平均直径大于180μm，只要颗粒的数均比例 小于53μm的大于80％，剩余的较大的颗粒的尺寸范围为53μm至180μm。 具有缓慢重结晶速率的粉末，其扫描速率在每分钟10℃至20℃的差示扫描量热法特征中不重叠或轻微重叠的吸热和放热峰所证明的也将导致 几乎完全致密的烧结部件，具有最小的尺寸变形。

公开(公告)号：US6136948A

公开(公告)日：2000-10-24

申请号：US892583

申请日：1997-07-14

申请人： Elmer Douglas Dickens, Jr. ,  Biing Lin Lee ,  Glenn Alfred Taylor ,  Angelo Joseph Magistro ,  Hendra Ng ,  Kevin P. McAlea ,  Paul F. Forderhase

发明人： Elmer Douglas Dickens, Jr. ,  Biing Lin Lee ,  Glenn Alfred Taylor ,  Angelo Joseph Magistro ,  Hendra Ng ,  Kevin P. McAlea ,  Paul F. Forderhase

IPC分类号： B29C35/08 ,  B29C41/00 ,  B29C67/00 ,  B29C67/04 ,  C08G69/14 ,  C08J3/12 ,  C08J9/24

CPC分类号： B29C67/04 ,  B29C41/003 ,  B29C67/0077 ,  C08J3/12 ,  C08J9/24 ,  B29C2035/0838 ,  B29K2023/00 ,  B29K2023/06 ,  B29K2023/12 ,  B29K2059/00 ,  B29K2067/006 ,  B29K2077/00 ,  B29K2079/00 ,  B29K2995/0094 ,  Y10S521/919 ,  Y10S525/902 ,  Y10T428/252

摘要： A laser-sinterable powder product has been prepared having unique properties which allow the powder to be sintered in a selective laser sintering machine to form a sintered part which is near-fully dense. For most purposes, the sintered part is indistinguishable from another part having the same dimensions made by isotropically molding the powder. In addition to being freely flowable at a temperature near its softening temperature, a useful powder is disclosed that has a two-tier distribution in which substantially no primary particles have an average diameter greater than 180 .mu.m, provided further that the number average ratio of particles smaller than 53 .mu.m is greater than 80%, the remaining larger particles being in the size range from 53 .mu.m to 180 .mu.m. A powder with slow recrystallization rates, as evidenced by non-overlapping or slightly overlapping endothermic and exothermic peaks in their differential scanning calorimetry characteristics for scan rates of on the order of 10.degree. C. to 20.degree. C. per minute, will also result in sintered parts that are near-fully dense, with minimal dimensional distortion.

摘要翻译： 已经制备了具有独特性质的激光可烧结粉末产品，其允许粉末在选择性激光烧结机中烧结以形成接近完全致密的烧结部分。 对于大多数目的，烧结部分与通过各向同性地成型粉末制成的具有相同尺寸的另一部件是不可区分的。 除了在接近其软化温度的温度下可自由流动外，还公开了一种有用的粉末，其具有两层分布，其中基本上没有一次颗粒的平均直径大于180μm，条件是， 小于53μm的颗粒大于80％，剩余的较大颗粒的尺寸范围为53μm至180μm。 具有缓慢重结晶速率的粉末，其扫描速率在每分钟10℃至20℃的差示扫描量热法特性中的非重叠或稍微重叠的吸热和放热峰所证明的也将导致 几乎完全致密的烧结部件，具有最小的尺寸变形。

公开(公告)号：US5648450A

公开(公告)日：1997-07-15

申请号：US664356

申请日：1996-06-17

申请人： Elmer Douglas Dickens, Jr. ,  Biing Lin Lee ,  Glenn Alfred Taylor ,  Angelo Joseph Magistro ,  Hendra Ng ,  Kevin P. McAlea ,  Paul F. Forderhase

发明人： Elmer Douglas Dickens, Jr. ,  Biing Lin Lee ,  Glenn Alfred Taylor ,  Angelo Joseph Magistro ,  Hendra Ng ,  Kevin P. McAlea ,  Paul F. Forderhase

IPC分类号： B29C35/08 ,  B29C41/00 ,  B29C67/00 ,  B29C67/04 ,  C08G69/14 ,  C08J3/12 ,  C08J9/24

CPC分类号： B29C67/04 ,  B29C41/003 ,  B29C67/0077 ,  C08J3/12 ,  C08J9/24 ,  B29C2035/0838 ,  B29K2023/00 ,  B29K2023/06 ,  B29K2023/12 ,  B29K2059/00 ,  B29K2067/006 ,  B29K2077/00 ,  B29K2079/00 ,  B29K2995/0094 ,  Y10S521/919 ,  Y10S525/902 ,  Y10T428/249958 ,  Y10T428/249986 ,  Y10T428/252

摘要： A laser-sinterable powder product has been prepared having unique properties which allow the powder to be sintered in a selective laser sintering machine to form a sintered part which is near-fully dense. For most purposes, the sintered part is indistinguishable from another part having the same dimensions made by isotropically molding the powder. In addition to being freely flowable at a temperature near its softening temperature, a useful powder is disclosed that has a two-tier distribution in which substantially no primary particles have an average diameter greater than 180 .mu.m, provided further that the number average ratio of particles smaller than 53 .mu.m is greater than 80%, the remaining larger particles being in the size range from 53 .mu.m to 180 .mu.m. A powder with slow recrystallization rates, as evidenced by non-overlapping or slightly overlapping endothermic and exothermic peaks in their differential scanning calorimetry characteristics for scan rates of on the order of 10.degree. C. to 20.degree. C. per minute, will also result in sintered parts that are near-fully dense, with minimal dimensional distortion.

摘要翻译： 已经制备了具有独特性质的激光可烧结粉末产品，其允许粉末在选择性激光烧结机中烧结以形成接近完全致密的烧结部分。 对于大多数目的，烧结部分与通过各向同性地成型粉末制成的具有相同尺寸的另一部件是不可区分的。 除了在接近其软化温度的温度下可自由流动外，还公开了一种有用的粉末，其具有两层分布，其中基本上没有一次颗粒的平均直径大于180μm，条件是， 小于53μm的颗粒大于80％，剩余的较大颗粒的尺寸范围为53μm至180μm。 具有缓慢重结晶速率的粉末，其扫描速率在每分钟10℃至20℃的差示扫描量热法特性中的非重叠或稍微重叠的吸热和放热峰所证明的也将导致 几乎完全致密的烧结部件，具有最小的尺寸变形。

公开(公告)号：US4117250A

公开(公告)日：1978-09-26

申请号：US863352

申请日：1977-12-22

申请人： Robert Dean Foster ,  Thomas Arthur Maliszewski ,  Joseph Alton Sims, Jr. ,  Glenn Alfred Taylor

发明人： Robert Dean Foster ,  Thomas Arthur Maliszewski ,  Joseph Alton Sims, Jr. ,  Glenn Alfred Taylor

IPC分类号： C07C29/12 ,  C07C27/00 ,  C07C29/09 ,  C07C31/20 ,  C07C67/00

CPC分类号： C07C29/095

摘要： A continuous process for hydrolyzing alkylene carbonates according to specific procedure whereby the akylene glycol obtained is essentially free of polymeric glycols and contains minimum amounts of dimeric glycols.