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公开(公告)号：DK135381B
公开(公告)日：1977-04-18
申请号：DK141671
申请日：1971-03-23
Applicant: HOECHST AG
Abstract: 1295597 Polymerizing vinyl chloride KNAPSACK AG 19 April 1971 [24 March 1970] 24683/71 Heading C3P Vinyl chloride is polymerized in aqueous suspension at 55-65‹C. and the particle size distribution is controlled by changing the speed of stirring at least once, increasing the speed to increase the proportion of coarse particles and decreasing to increase the proportion of fine particles.
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公开(公告)号：DK399677A
公开(公告)日：1978-03-10
申请号：DK399677
申请日：1977-09-08
Applicant: HOECHST AG
Inventor： KUXDORF B , KAISER K , WESSELMANN R
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公开(公告)号：NO135668C
公开(公告)日：1977-05-11
申请号：NO80471
申请日：1971-03-03
Applicant: HOECHST AG
IPC: C08F14/06 , C08F114/06 , C08F2/18
Abstract: 1308574 Porous polyvinyl chloride KNAPSACK AG 19 April 1971 [24 March 1970] 24682/71 Headings C3C and C3P Porous polyvinyl chloride is prepared by polymerization of vinyl chloride in aqueous suspension in the presence of a protective colloid and an initiator, the suspension being agitated throughout save for a pause of between ¢ and 1¢ hours commencing between 10 and 20 minutes after the start of the reaction, the polymer resulting being isolated and dried. The reaction is performed at temperatures between 50‹ and 65‹ C., preferably 55‹ C. The initiator is soluble in the monomer. Examples given are tertiary butylperpivalate, diisopropylperoxidicarbonate, and acetyl cyclohexane-sulphonyl peroxide. The initiator is used in a quantity of preferably 0À02% by weight of vinyl chloride. The resulting polyvinylchloride has, at best, a K value of 70, a bulk density of 470 g./litre and a softener absorption power of at least 28%.
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Patent Agency Ranking
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公开(公告)号：NO135668B
公开(公告)日：1977-01-31
申请号：NO80471
申请日：1971-03-03
Applicant: HOECHST AG
IPC: C08F14/06 , C08F114/06 , C08F2/18
Abstract: 1308574 Porous polyvinyl chloride KNAPSACK AG 19 April 1971 [24 March 1970] 24682/71 Headings C3C and C3P Porous polyvinyl chloride is prepared by polymerization of vinyl chloride in aqueous suspension in the presence of a protective colloid and an initiator, the suspension being agitated throughout save for a pause of between ¢ and 1¢ hours commencing between 10 and 20 minutes after the start of the reaction, the polymer resulting being isolated and dried. The reaction is performed at temperatures between 50‹ and 65‹ C., preferably 55‹ C. The initiator is soluble in the monomer. Examples given are tertiary butylperpivalate, diisopropylperoxidicarbonate, and acetyl cyclohexane-sulphonyl peroxide. The initiator is used in a quantity of preferably 0À02% by weight of vinyl chloride. The resulting polyvinylchloride has, at best, a K value of 70, a bulk density of 470 g./litre and a softener absorption power of at least 28%.
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公开(公告)号：YU271476A
公开(公告)日：1982-05-31
申请号：YU271476
申请日：1976-11-04
Applicant: HOECHST AG
Inventor： KUXDOREF B , KAISER K , WISSEL K
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