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1. 发明公开

EP3936555A1 PLASTICISED POLYVINYL ALCOHOL MIXTURE AND METHOD FOR MAKING IT. 审中-公开
公开(公告)号：EP3936555A1
公开(公告)日：2022-01-12
申请号：EP20184345.5
申请日：2020-07-06
申请人： Aquapak Polymers Limited
发明人： ASHWORTH, Robert , GRIFFITHS, Sian , WILLIAMS, John
IPC分类号： C08J3/18 , C08K5/053 , C08L29/04 , B29C48/00 , B29C48/345 , B29C48/385 , B29C48/92 , B29B9/06
摘要： The invention describes a method for the manufacture of a plasticised polyvinyl alcohol polymer mixture, the method comprising the steps of:
introducing a polyvinyl alcohol polymer comprising polyvinyl alcohol or a blend thereof having a degree of hydrolysis in the range of 93wt% to less than 98wt% into a mixing reactor;
wherein the mixing reactor comprises a blending chamber having a primary inlet, a primary outlet and at least two inter-engaging components extending between the primary inlet and primary outlet, the components being arranged to apply a shearing force to the polymer while the polymer is conveyed by the components from the inlet through a reaction zone to the outlet;
one or more secondary inlets located downstream from the primary inlet for introducing reactants comprising a processing aid and a plasticiser to the chamber to form a reaction mixture;
wherein the plasticiser is selected from the group consisting of:
pentaerythritol
tripentaerythritol (TPE)
neopentyl glycol (NPG)
trimethylol propane (TMP)
trimethylol ethane (TME)
di(trimethylol propane) (DTMP)
2,2 - diethyl-1,3-propanediol (DEPD)
itaconic acid and its salts
and mixtures thereof
wherein the blending chamber comprises a plurality of heated regions arranged so that the mixture is subjected to a temperature profile whereby the temperature increases from the inlet to the outlet;
a secondary outlet located between the reaction zone and primary outlet arranged to allow removal of processing aid from the chamber;
reacting the processing agent, plasticiser and polymer in the reaction zone to form plasticised polymer; and
allowing the plasticised polymer mixture to pass from the primary outlet.

2. 发明公开

EP4175997A1 PROCESS FOR MANUFACTURE OF PLASTICISED HOMOPOLYMERIC POLYVINYL ALCOHOL AND PLASTICISED POLYVINYL ALCOHOL POLYMER OBTAINED THEREFROM 审中-实审转让
公开(公告)号：EP4175997A1
公开(公告)日：2023-05-10
申请号：EP21740033.2
申请日：2021-07-06
申请人： Aquapak Polymers Limited
发明人： WILLIAMS, John , GRIFFITHS, Sian , ASHFORD, Robert
IPC分类号： C08J3/18 , C08K5/09 , C08K5/098 , C08K5/053 , C08L29/04

3. 发明公开

EP4175996A1 METHOD FOR MANUFACTURE OF A PLASTICISED POLYVINYL ALCOHOL MIXTURE 审中-实审转让
公开(公告)号：EP4175996A1
公开(公告)日：2023-05-10
申请号：EP21740030.8
申请日：2021-07-06
申请人： Aquapak Polymers Limited
发明人： WILLIAMS, John , GRIFFITHS, Sian , ASHWORTH, Robert
IPC分类号： C08J3/18 , C08K5/053 , C08K5/3412 , C08L29/04

4. 发明公开

EP3350231A1 PROCESS AND APPARATUS FOR MANUFACTURE OF PROCESSABLE POLYVINYL ALCOHOL 有权
公开(公告)号：EP3350231A1
公开(公告)日：2018-07-25
申请号：EP16793761.4
申请日：2016-09-16
申请人： Aquapak Polymers Limited
发明人： JOHNSON, Anthony Francis , WONG, Stephen Sik Fan
IPC分类号： C08F8/00 , C08F16/06 , C08L29/04 , C08K5/00 , C08L71/02 , B29C47/00 , B29K29/00 , C08J3/18 , C08K5/053 , C08K5/06
CPC分类号： C08J3/18 , B29B9/06 , B29C47/0014 , B29C47/0066 , B29C47/30 , B29C47/366 , B29C47/40 , B29C47/92 , C08F8/00 , C08J2329/04 , C08K5/053 , C08L29/04 , C08L2203/16 , C08L2205/025 , C08L2205/03 , C08F16/06 , C08L71/02
摘要： The invention describes a method for the manufacture of a plasticised polyvinyl alcohol polymer mixture, the method comprising the steps of: introducing a polyvinyl alcohol polymer comprising at least 98wt% polyvinyl alcohol or a blend of the polymer into a mixing reactor; wherein the mixing reactor comprises a blending chamber having a primary inlet, a primary outlet and at least two inter-engaging components extending between the primary inlet and primary outlet, the components being arranged to apply a shearing force to the polymer while the polymer is conveyed by the components from the inlet through a reaction zone to the outlet; one or more secondary inlets located downstream from the primary inlet for introducing reactants comprising a processing agent and a plasticiser to the chamber to form a reaction mixture; wherein the blending chamber comprises a plurality of heated regions arranged so that the mixture is subjected to a controlled temperature profile; a secondary outlet located between the reaction zone and primary outlet arranged to allow removal of processing agent from the chamber; reacting a reaction mixture comprising the processing agent, plasticiser and polymer in the reaction zone to form plasticised polymer; wherein when the processing agent is water the amounts of water is from 3wt% to 18wt%; and allowing the plasticised polymer to pass from the primary outlet.

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