公开(公告)号：US3666704A

公开(公告)日：1972-05-30

申请号：US3666704D

申请日：1970-04-27

Applicant: BASF AG

Inventor： KEPPLER HANS-GEORG ,  WESSLAU HERMANN

IPC: C08F2/22 ,  C08F291/00

CPC classification number: C08F291/00 ,  C08F2/22

Abstract: Production of aqueous polymer dispersions containing relatively large polymer particles by polymerizing olefinically unsaturated monomers (A) and, if desired, olefinically unsaturated monomers (A'') in aqueous emulsion in the presence of conventional dispersing agents, catalysts and previously prepared emulsion polymers of olefinically unsaturated monomers carried out by adding, during the polymerization of the monomers (A) and, if present, (A'') up to a point where 95 percent of said monomers have been converted, minor quantities of previously prepared emulsion polymers in the form of an aqueous dispersion, which emulsion polymers contain from 0.5 to 50 percent of their weight of polymerized units of olefinically unsaturated monomers (B) which when polymerized alone yield water-soluble homopolymers, the proportion of monomers (A'') in admixture with the monomers (A) being at least 20 percent (based on the proportion of polymerized units of monomers (B) in the previously prepared emulsion polymer) less than the proportion of polymerized units of the monomers (B) in the previously prepared emulsion polymer.

Abstract translation: 通过在常规分散剂，催化剂和预先制备的烯属不饱和的乳液聚合物的存在下，通过聚合烯属不饱和单体（A）和（如果需要）水性乳液中的烯属不饱和单体（A'），生产含有相对较大的聚合物颗粒的聚合物水分散体 在单体（A）和（如果存在的话）（A'）的聚合过程中加入直到95％的所述单体被转化的点的单体进行的是少量预先制备的乳液聚合物 单体（A'）与单体（A）混合的比例（A'）与单体 ）为至少20％（基于先前制备的乳液中单体（B）的聚合单元的比例） 聚合物）小于预先制备的乳液聚合物中单体（B）的聚合单元的比例。

公开(公告)号：AU3856572A

公开(公告)日：1973-08-09

申请号：AU3856572

申请日：1972-02-02

Applicant: BASF AG

Inventor： NINTZ ECKHARD ,  KEPPLER HANS-GEORG ,  ZUERN LUDWIG ,  STAHNECKER ERHARD

IPC: C08F47/10

公开(公告)号：CA976284A

公开(公告)日：1975-10-14

申请号：CA153278

申请日：1972-10-04

Applicant: BASF AG

Inventor： KEPPLER HANS-GEORG ,  ZUERN LUDWIG ,  STAHNECKER ERHARD

IPC: C02F1/58 ,  C02F1/52 ,  C02F1/72 ,  C02F9/00

Abstract: 1396755 Purifying waste water BADISCHE ANILIN- & SODA-FABRIK AG 6 Oct 1972 [7 Oct 1971] 46193/72 Heading C1C In a process for purifying waste water, containing suspended matter and resulting from the manufacture of a styrene bead polymer in the presence of a vinyl pyrrolidone polymer or vinyl alcohol polymer used as suspension stabilizers, the suspended matter is flocculated by heating the waste water in the presence of from 0À02 to 5% by weight of sodium, potassium or ammonium persulphate. The waste water may be heated to 110-180‹ C. in the presence of the persulphate. Activated charcoal, silica or bentonite may be added to the waste water before, during or after heating. The flocculate may be removed by a suction belt strainer or by means of a decanter.

公开(公告)号：AU4727972A

公开(公告)日：1974-04-11

申请号：AU4727972

申请日：1972-10-03

Applicant: BASF AG

Inventor： KEPPLER HANS-GEORG ,  ZUERN LUDWIG ,  STAHNECKER ERHARD

IPC: C02F1/58 ,  C02F1/52 ,  C02F1/72 ,  C02F9/00 ,  C02C5/02

Abstract: 1396755 Purifying waste water BADISCHE ANILIN- & SODA-FABRIK AG 6 Oct 1972 [7 Oct 1971] 46193/72 Heading C1C In a process for purifying waste water, containing suspended matter and resulting from the manufacture of a styrene bead polymer in the presence of a vinyl pyrrolidone polymer or vinyl alcohol polymer used as suspension stabilizers, the suspended matter is flocculated by heating the waste water in the presence of from 0À02 to 5% by weight of sodium, potassium or ammonium persulphate. The waste water may be heated to 110-180‹ C. in the presence of the persulphate. Activated charcoal, silica or bentonite may be added to the waste water before, during or after heating. The flocculate may be removed by a suction belt strainer or by means of a decanter.

公开(公告)号：CA1008599A

公开(公告)日：1977-04-12

申请号：CA133803

申请日：1972-02-02

Applicant: BASF AG

Inventor： NINTZ ECKHARD ,  KEPPLER HANS-GEORG ,  ZUERN LUDWIG ,  STAHNECKER ERHARD

IPC: C08J9/00 ,  C08J9/20