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公开(公告)号：DE3921147A1
公开(公告)日：1991-01-10
申请号：DE3921147
申请日：1989-06-28
Applicant: BASF AG
Inventor： HINTZ HANS DR , GUHR UWE DR , HAHN KLAUS DR , KEPPLER HANS GEORG DR
Abstract: Bead-form expandable styrene polymers are obtained by suspension polymerization of styrene with addition of from 1 to 10% by weight of C3- to C6-hydrocarbons as blowing agents and, if desired, customary additives, where (a) the polymerization is initiated by rapidly heating the polymerization batch to form 80 DEG to 90 DEG C. within a maximum of 2 hours, (b) subsequently allowing the reaction temperature to increase to from 120 DEG C. to 130 DEG C. by from 8 DEG to 17 DEG C. per hour, and (c) the conversion is formed 30 to 60% when 100 DEG C. is reached, and (d) the conversion is 80% or more when the maximum temperature is reached, and (e) the batch is subsequently kept at from 100 DEG to 130 DEG C. until the residual monomer content in the polymer has dropped to less than 0.1%.
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Patent Agency Ranking
公开(公告)号：ES2058688T3
公开(公告)日：1994-11-01
申请号：ES90111719
申请日：1990-06-21
Applicant: BASF AG
Inventor： HINTZ HANS DR , GUHR UWE DR , HAHN KLAUS DR , KEPPLER HANS GEORG DR
Abstract: Bead-form expandable styrene polymers are obtained by suspension polymerization of styrene with addition of from 1 to 10% by weight of C3- to C6-hydrocarbons as blowing agents and, if desired, customary additives, where (a) the polymerization is initiated by rapidly heating the polymerization batch to form 80 DEG to 90 DEG C. within a maximum of 2 hours, (b) subsequently allowing the reaction temperature to increase to from 120 DEG C. to 130 DEG C. by from 8 DEG to 17 DEG C. per hour, and (c) the conversion is formed 30 to 60% when 100 DEG C. is reached, and (d) the conversion is 80% or more when the maximum temperature is reached, and (e) the batch is subsequently kept at from 100 DEG to 130 DEG C. until the residual monomer content in the polymer has dropped to less than 0.1%.
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公开(公告)号：DE3264023D1
公开(公告)日：1985-07-11
申请号：DE3264023
申请日：1982-06-16
Applicant: BASF AG
Inventor： KEPPLER HANS GEORG DR
Abstract: A process for the preparation of styrene homopolymers or copolymers by suspension polymerization of monomers which contain dissolved styrene polymers from a preceding suspension polymerization, in the presence of sparingly soluble metal phosphates as suspension stabilizers, wherein, before the polymerization is started, the monomer phase is dispersed in an aqueous phase, containing a dissolved mineral acid, preferably phosphoric acid, at from 10 DEG to 80 DEG C. for from 5 to 120 minutes, after which the sparingly soluble metal phosphate is formed in situ in the aqueous phase. The process is particularly suitable for the preparation of expandable styrene polymers, in which case a volatile blowing agent is added to the suspension before, during or after polymerization.
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公开(公告)号：DE59007037D1
公开(公告)日：1994-10-13
申请号：DE59007037
申请日：1990-06-21
Applicant: BASF AG
Inventor： HINTZ HANS DR , GUHR UWE DR , HAHN KLAUS DR , KEPPLER HANS GEORG DR
Abstract: Bead-form expandable styrene polymers are obtained by suspension polymerization of styrene with addition of from 1 to 10% by weight of C3- to C6-hydrocarbons as blowing agents and, if desired, customary additives, where (a) the polymerization is initiated by rapidly heating the polymerization batch to form 80 DEG to 90 DEG C. within a maximum of 2 hours, (b) subsequently allowing the reaction temperature to increase to from 120 DEG C. to 130 DEG C. by from 8 DEG to 17 DEG C. per hour, and (c) the conversion is formed 30 to 60% when 100 DEG C. is reached, and (d) the conversion is 80% or more when the maximum temperature is reached, and (e) the batch is subsequently kept at from 100 DEG to 130 DEG C. until the residual monomer content in the polymer has dropped to less than 0.1%.
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公开(公告)号：AT111130T
公开(公告)日：1994-09-15
申请号：AT90111719
申请日：1990-06-21
Applicant: BASF AG
Inventor： HINTZ HANS DR , GUHR UWE DR , HAHN KLAUS DR , KEPPLER HANS GEORG DR
Abstract: Bead-form expandable styrene polymers are obtained by suspension polymerization of styrene with addition of from 1 to 10% by weight of C3- to C6-hydrocarbons as blowing agents and, if desired, customary additives, where (a) the polymerization is initiated by rapidly heating the polymerization batch to form 80 DEG to 90 DEG C. within a maximum of 2 hours, (b) subsequently allowing the reaction temperature to increase to from 120 DEG C. to 130 DEG C. by from 8 DEG to 17 DEG C. per hour, and (c) the conversion is formed 30 to 60% when 100 DEG C. is reached, and (d) the conversion is 80% or more when the maximum temperature is reached, and (e) the batch is subsequently kept at from 100 DEG to 130 DEG C. until the residual monomer content in the polymer has dropped to less than 0.1%.
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公开(公告)号：DE2860059D1
公开(公告)日：1980-11-13
申请号：DE2860059
申请日：1978-07-12
Applicant: BASF AG
Inventor： KNIESE WILHELM DR , KEPPLER HANS GEORG DR , MOELLER ROLF DR , GUHR UWE DR
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