公开(公告)号：CA1098249A

公开(公告)日：1981-03-24

申请号：CA296889

申请日：1978-02-15

Applicant: STAMICARBON

Inventor： SCHOEN LOEWHARDT A A ,  VAN ASPEREN PIETER J ,  BRULS WILHELMUS G M ,  DEBETS WILHELMUS A M

IPC: C08F8/00 ,  C08F8/20 ,  C08F8/22 ,  C08F110/02 ,  C08F10/02

Abstract: An improved process for chlorinating high density polyethylene "in bulk" is described, with a two-stage reaction, the first at temperatures below the crystalline melting point, and the second above that temperature, and using a polyethylene starting material having a critical combination of characteristics, as described.

公开(公告)号：CA1083298A

公开(公告)日：1980-08-05

申请号：CA250483

申请日：1976-04-20

Applicant: STAMICARBON

Inventor： SCHOEN LOEWHARDT A A ,  BRULS WILHELMUS G M ,  DEBETS WILHELMUS A M

IPC: C08F8/00 ,  C08F8/20 ,  C08F8/22 ,  C08F14/06

Abstract: Vinyl chloride polymers are chlorinated in a dry, two-step process including treating particulate vinyl chloride with gaseous chlorine at temperatures in the range of -20.degree.C to +150.degree.C, preferably 20-25.degree.C and without the use of radical-forming initiators or radiation for at least about 30 minutes, then increasing the temperature of the reaction to at least 70.degree.C until thermal radical formation occurs. In the second step the temperature is maintained below the point where the vinyl chloride is apt to agglomerate or discoloration occurs. This process avoids the use of liquid systems and provides a final product in a dry powder form having an increased dimensional stability.

公开(公告)号：CA978997A

公开(公告)日：1975-12-02

申请号：CA107087

申请日：1971-03-08

Applicant: STAMICARBON

Inventor： SCHOEN LOEWHARDT A A

IPC: C07F5/06 ,  C08G63/82

公开(公告)号：DD134533A5

公开(公告)日：1979-03-07

申请号：DD20370078

申请日：1978-02-14

Applicant: STAMICARBON

Inventor： SCHOEN LOEWHARDT A A ,  VAN ASPEREN PIETER J ,  BRULS WILHELMUS G M ,  DEBETS WILHELMUS A M

IPC: C08F8/00 ,  C08F8/20 ,  C08F8/22 ,  C08F110/02

Abstract: An improved process for chlorinating high density polyethylene "in bulk" is described, with a two-stage reaction, the first at temperatures below the crystalline melting point, and the second above that temperature, and using a polyethylene starting material having a critical combination of characteristics, as described.

公开(公告)号：CA1026047A

公开(公告)日：1978-02-07

申请号：CA207988

申请日：1974-08-28

Applicant: STAMICARBON

Inventor： SCHOEN LOEWHARDT A A

IPC: C08F14/00 ,  C08F8/00 ,  C08F8/20 ,  C08F8/22

Abstract: A process for chlorinating solid, finely-divided ethylene polymers is disclosed, wherein the resulting chloropolyethylene has a statistical or hybridical distribution of chlorine in the polymer. The polymer is mixed with 10 - 100% by weight of water, based on the weight of the ethylene polymer, and the polymer is chlorinated with chlorine at a temperature which is above the crystalline melting point of the ethylene polymer during at least 70% of the chlorination period. The chlorination pressure is such that the boiling point of water at that pressure is at least equal to the chlorination temperature. The amount of water in the ethylene polymer is maintained at a level of at least 10% by weight based on starting ethylene polymer until the chlorination has proceeded at least to the point where the chlorine content of the polymer is 15% by weight.

公开(公告)号：CA1021643A

公开(公告)日：1977-11-29

申请号：CA202728

申请日：1974-06-18

Applicant: STAMICARBON

Inventor： SCHOEN LOEWHARDT A A ,  BUSSCHERS FRANCISCUS A

IPC: B05D7/02 ,  C08J5/12 ,  C08J7/04 ,  C09D175/04

Abstract: A process for improving the adhesive properties of the surface of a body or article derived from co-polymers or terpolymers of ethylene and propylene wherein the surface of the article or body is treated with a primer containing an isocyanate-terminated prepolymer which is the reaction product of a rubber-like, hydroxyl-containing alkadiene-derived polymer and an organic diisocyanate.