公开(公告)号：US3855172A

公开(公告)日：1974-12-17

申请号：US24203972

申请日：1972-04-07

Applicant: DU PONT

Inventor： ILER R ,  MCQUESTON H

IPC: B01J2/00 ,  B01J2/08 ,  B01J13/00 ,  B01J13/02 ,  B01J13/14 ,  B01J20/28 ,  B01J37/00 ,  C01B13/14 ,  C04B14/02 ,  C04B14/30 ,  C04B35/628 ,  C09C3/00 ,  C08G51/04

CPC classification number: B01J13/025 ,  B01J2/08 ,  B01J13/14 ,  C01P2004/32 ,  C01P2004/50 ,  C01P2004/52 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/13 ,  C01P2006/14 ,  C01P2006/16

Abstract: Oxide microspheres having a diameter in the 0.5 to 20 micron range are produced by forming a mixture of urea or melamine and formaldehyde in an aqueous sol containing colloidal oxide particles. Copolymerization of the organic constituents produces coacervation of the organic material into microparticles containing the inorganic material. The organic constituent can be burned out to form a powder of uniform-sized porous microparticles consisting of an interconnected array of inorganic colloidal particles separated by uniform-sized pores.

Abstract translation: 通过在含有胶体氧化物颗粒的水性溶胶中形成尿素或三聚氰胺和甲醛的混合物来生产直径在0.5至20微米范围内的氧化物微球。 有机成分的共聚使有机材料凝聚成含有无机材料的微粒。 可以将有机成分烧成，形成均匀尺寸的多孔微粒的粉末，其由均匀孔隙分离的无机胶体粒子的相互连接的阵列组成。

公开(公告)号：US3762936A

公开(公告)日：1973-10-02

申请号：US3762936D

申请日：1971-02-02

Applicant: DU PONT

Inventor： ILER R

IPC: C03C1/00 ,  C03C1/02 ,  C03C3/06 ,  C03C3/089 ,  C03C3/08 ,  C03C3/04

CPC classification number: C03C1/00 ,  C03C1/026 ,  C03C3/06 ,  C03C3/089 ,  C03C2201/10 ,  C03C2203/10 ,  Y10S65/901

Abstract: An intimate mixture of a boric oxide source compound and colloidally subdivided amorphous silica is slowly heated to evolve all moisture and boric oxide source decomposition products. The mixture is then heated to a final temperature between 500* and 900* C. to form a borosilicate glass powder directly, or to form a borosilicate glass agglomerate which may readily be crushed to a powder.

公开(公告)号：US3756958A

公开(公告)日：1973-09-04

申请号：US3756958D

申请日：1972-04-12

Applicant: DU PONT

Inventor： ILER R

IPC: C01B33/146 ,  C01B33/143 ,  B01J13/00 ,  C01B33/14

CPC classification number: C01B33/1435

Abstract: THE SIZE OF SILICA PARTICLES IN A HOT ALKALINE COLLOIDAL SILICA SOL CAN BE INCREASED BY ADDING SODIUM SILICATE TO THE SOL AND REMOVING SODIUM IONS FROM THE SOL THROUGH A CATION EXCHANGE MEMBRANE INTO AN ACID. SALT FORMED BY MIGRATION OF ANIONS FROM THE ACID INTO THE SOL MUST BE MAINTAINED WITHIN A CONCENTRATION RANGE DETERMINED BY THE CONCENTRATION OF SILICA IN THE SOL.

公开(公告)号：US3738957A

公开(公告)日：1973-06-12

申请号：US3738957D

申请日：1971-03-18

Applicant: DU PONT

Inventor： ILER R

IPC: B01J13/00 ,  B01J20/32 ,  B01J21/08 ,  C01B33/155 ,  C01B33/16 ,  C08K3/36 ,  D21H19/40 ,  D21H19/60 ,  C08F45/04

CPC classification number: D21H19/60 ,  B01J13/0065 ,  B01J20/103 ,  B01J20/261 ,  B01J20/28007 ,  B01J20/28047 ,  B01J20/3204 ,  B01J20/327 ,  B01J21/08 ,  B82Y30/00 ,  C01B33/155 ,  C01B33/16 ,  C08K3/36 ,  D21H19/40 ,  Y10S516/922 ,  Y10S516/928 ,  C08L29/04

Abstract: COACERVATES OF POLYVINYL ALCOHOL AND COLLOIDAL SILICA HAVING THE AVERAGE PARTICLE DIAMETER OF 4-50 NANOMETERS ARE FORMED IN GOOD YIELDS WITHIN THE PH RANGE OF 1.5-4.5 AND WITH THE SILICA/POLYVINYL ALCOHOL CAN BE FORMED MOMOMOLECULAR LAYER OF POLYVINYL ALCOHOL CAN BE FORMED ON THE SILICA SURFACE. THE CONCENTRATION OF POLYVINYL ALCOHOL IS SUCH THAT THERE ARE 1-5 ALCOHOLIC HYDROXYL GROUPS PER SQUARE NANOMETER OF SILICA SURFACE. SUCH COACERVATES ARE USEFUL AS INSOLUBILIZERS AND EXTENDERS FOR POLYVINYL ACETATE EMULSIONS, AS A SOURCE OF FINE SILICA POWDERS THAT CAN BE USED AS ADSORBENTS FOR VAPORS OR AS A SOURCE OF COLLOIDAL SILICA DISPERSIBLE IN WATER-MISCIBLE ORGANIC SOLVENTS.

公开(公告)号：US3776706A

公开(公告)日：1973-12-04

申请号：US3776706D

申请日：1971-12-15

Applicant: DU PONT

Inventor： DANIELS A ,  ILER R

IPC: C04B35/10 ,  C04B35/56 ,  C30B29/26 ,  B22F5/00 ,  C22C29/00

CPC classification number: C04B35/645 ,  C04B35/10 ,  C04B35/5611 ,  C30B29/26 ,  Y10S75/951 ,  Y10S428/927 ,  Y10T29/49584 ,  Y10T29/49597

Abstract: Fine-grained mixtures of 25 to 75 volume percent refractory aluminum oxide, 25 to 75 volume percent refractory titanium carbide, and 0 to 10 volume percent metal are sintered or hotpressed to form articles of jewelry having low porosity, a metallic-grey appearance, perspiration resistance and a high luster when polished.

Abstract translation: 将25至75体积百分比的耐火氧化铝，25至75体积％的耐火碳化钛和0至10体积％的金属的细粒混合物烧结或热压以形成具有低孔隙率，金属灰色外观的首饰制品 耐汗，耐磨性好。

公开(公告)号：US3773776A

公开(公告)日：1973-11-20

申请号：US3773776D

申请日：1971-03-31

Applicant: DU PONT

Inventor： ILER R

IPC: C08K3/36 ,  C08F45/24

CPC classification number: C08K3/36 ,  C08L29/04

Abstract: COMPOSITIONS OF COLLOIDAL SILICAL HAVING THE AVERAGE PARTICLE SIZE DIAMETER OF 4-30 NANOMETERS AND OF POLYVINYL ALCOHOL FORM COHERENT, HOMOGENEOUS FILMS THAT ARE WATER-RESISTANT, PROVIDED THE PH OF SUCH COMPOSITIONS IS LESS THAN ABOUT 6 AND THAT THE FOLLOWING REQUIREMENTS ARE SATISIFIED: THE WEIGHT RATION OF SILICAL TO THE POLYVINYL ALCOHOL IS GREATER THAN THE NUMERICAL VALUE OF 0.0062 D.2 BUT LESS THAN THE NUMERICAL VALUE OF 0.25 D., WHERE D. IS THE AVRAGE PARTICLE DIAMETER OF THE COLLODIAL SILICA EXPRESSED IN NANOMETERS; BUT THIS RATIO IS ALWAYS AT LEAST 0.22. THE SILICA/POLYVINYL ALCOHOL FILMS OBTAINED IN THIS MANNER ARE USEFUL FOR GREASEPROOFING AND WATERPROOFING PAPER AND ARTICLES AND FOR RENDERING SURFACES SLIP-RESISTANT.