公开(公告)号：JPS6211710A

公开(公告)日：1987-01-20

申请号：JP10125886

申请日：1986-05-02

Applicant: STAMICARBON

Inventor： MEYER PETER J N ,  STEEMAN REINARD J M

IPC: B01J19/18 ,  C08F2/00 ,  C08F212/00 ,  C08F212/04 ,  C08F222/08 ,  C08F291/00 ,  C08F291/02

公开(公告)号：CA1254327A

公开(公告)日：1989-05-16

申请号：CA452764

申请日：1984-04-25

Applicant: STAMICARBON

Inventor： TUYT ROBERT C ,  EVENS GEORGES G ,  MEYER PETER J N ,  PONS DICK A

IPC: C08F2/00 ,  C08F2/18 ,  C08F2/20 ,  C08F2/44 ,  C08F14/06

Abstract: 22772-1007 The invention relates to a process for preparing vinyl chloride polymers by suspension polymerization in a polymerization reactor of vinyl chloride, optionally in combination with at most 30 % (wt) of one or more monomers copolymerizable therewith, with monomer - soluble, radical - forming initiators and possibly in the presence of primary suspending agents. The improvement comprises the addition of an aqueous dispersion of at least one polyvinyl ester with a degree of solvolysis in respect of the dry substance lower than 25 moles % to the polymerizetion reactor before or during said polymerization, which polyvinyl ester is chosen from the polymeric vinyl esters of aliphatic and/or aromatic carboxylic acids, the amount of the aqueous dispersion supplied being such that after this addition the reaction mixture contains 0.01-0.5 part by weight of the polyvinyl ester per 100 parts by weight of the starting monomer.

公开(公告)号：CA1243795A

公开(公告)日：1988-10-25

申请号：CA452765

申请日：1984-04-25

Applicant: STAMICARBON

Inventor： TUYT ROBERT C ,  EVENS GEORGES G ,  MEYER PETER J N ,  PONS DICK A

IPC: C08F2/00 ,  C08F2/18 ,  C08F2/20 ,  C08F2/44 ,  C08F14/06

Abstract: The invention relates to a process for preparing vinyl chloride polymers by suspension polymerization in a polymerization reactor of vinyl chloride, optionally in combination with at most 30 % (wt) of one or more monomers copolymerizable therewith, with monomer-soluble, radicalforming initiators and optionally in the presence of primary suspending agents. The improvement comprises the addition of 0.01-0.5 part by weight of at least one polyvinyl ester with an average degree of solvolysis lower than 70 moles % per 100 parts by weight of the starting monomer to the polymerization reactor before or during this polymerization, which polyvinyl ester is chosen from the polymeric vinyl esters of aliphatic and/or aromatic carboxylic acids with 3-20 C-atoms per molecule. The process enables production of polymers with lower fish-eye numbers.

公开(公告)号：DE3681822D1

公开(公告)日：1991-11-14

申请号：DE3681822

申请日：1986-05-02

Applicant: STAMICARBON

Inventor： MEYER PETER J N ,  STEEMAN REINARD J M

IPC: B01J19/18 ,  C08F2/00 ,  C08F212/00 ,  C08F212/04 ,  C08F222/08 ,  C08F291/00 ,  C08F291/02

Abstract: The invention relates to a preocess for the preparation of a thermoplastic polymer on the basis of an alkenyl aromatic monomer, an unsaturated dicarboxylic anhydride, and, optionally, a rubber, characterized in that the monomers and/or solution thereof are/is reacted in at least two reaction zones that are in open connection with each other at the top and at the bottom, the reaction mixture being circulated through the reaction zones by means of a mixing device and/or a conveying device.Using the process, a homogeneous product of constant composition is obtained.

公开(公告)号：AT68192T

公开(公告)日：1991-10-15

申请号：AT86200768

申请日：1986-05-02

Applicant: STAMICARBON

Inventor： MEYER PETER J N ,  STEEMAN REINARD J M

IPC: B01J19/18 ,  C08F2/00 ,  C08F212/00 ,  C08F212/04 ,  C08F222/08 ,  C08F291/00 ,  C08F291/02

Abstract: The invention relates to a preocess for the preparation of a thermoplastic polymer on the basis of an alkenyl aromatic monomer, an unsaturated dicarboxylic anhydride, and, optionally, a rubber, characterized in that the monomers and/or solution thereof are/is reacted in at least two reaction zones that are in open connection with each other at the top and at the bottom, the reaction mixture being circulated through the reaction zones by means of a mixing device and/or a conveying device.Using the process, a homogeneous product of constant composition is obtained.

公开(公告)号：CA1148960A

公开(公告)日：1983-06-28

申请号：CA367177

申请日：1980-12-19

Applicant: STAMICARBON

Inventor： MEYER PETER J N ,  NIEUWKAMP JOHANNES G M

IPC: C07D207/263 ,  B01J23/00 ,  C07B61/00 ,  C07D201/08 ,  C07D207/267

Abstract: 3149 Process for the preparation of a 2-pyrrolidone by hydrogenation of optionally substituted succinonitrile in het liquid phase in the presence of ammonia using a fixed-bed catalyst and treatment of the hydrogenated product with water, in which the hydrogenation one or more times is interrupted for regeneration of the catalyst by passing liquid ammonia at 75-130 .degree.C, subsequently hydrogen at 130-350 .degree.C and then liquid ammonia again at 75-130 .degree.C over the catalyst.

公开(公告)号：CA1140573A

公开(公告)日：1983-02-01

申请号：CA333791

申请日：1979-08-15

Applicant: STAMICARBON

Inventor： MEYER PETER J N ,  PENDERS JOSEF M

IPC: C07C69/716 ,  B01J31/02 ,  B01J31/04 ,  C07B61/00 ,  C07C51/373 ,  C07C59/185 ,  C07C69/738 ,  C07C121/34

Abstract: A process is described for the preparation of delta keto-acids wherein there is used as a catalyst the condensation adduct of a cyclic secondary amine with an .alpha.-.beta.-acrylic-type unsaturated compound, providing high selectivity and conversion results.