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1. 发明申请

WO2022112481A1 MICROEMULSION OR MICROSUSPENSION PROCESS FOR THE PRODUCTION OF A POLYMER DISPERSION, AND POLYMER PARTICLES OBTAINABLE BY THE PROCESS 审中-公开
公开(公告)号：WO2022112481A1
公开(公告)日：2022-06-02
申请号：PCT/EP2021/083117
申请日：2021-11-26
申请人： UNIVERSITÄT REGENSBURG
发明人： KUNZ, Werner , KRICKL, Sebastian , BLAHNIK, Jonas , SCHMID, Klaus
IPC分类号： C08F2/22 , C08F2/32 , C08F120/14 , C08F20/00
摘要： Provided is a process for the preparation of a polymer dispersion, comprising (a) a step of providing an oil-in-water microemulsion, which oil-in-water microemulsion comprises (i) dispersed domains comprising one or more types of radically polymerizable monomers which are insoluble in water or which have a miscibility gap with water, (ii) water, (iii) a hydrotrope which comprises a compound selected from compounds of the formula R1-(O-R2)m-O-R3 or of the formula R4-OH, or a mixture of two or more of these compounds, wherein R1 is a hydrocarbyl group which is free of any moiety with more than 6 carbon atoms attached to each other, m is 1 or 2, R2 is, independently for each occurrence if m is more than 1, selected from ethanediyl (-CH2-CH2-) and isopropanediyl (-CH(CH3)-CH2-), R3 is selected from hydrogen, methyl, ethyl, propyl, and -CH2-COOH, and R4 is a C3 to C6 alkyl group, and (iv) a radical initiator, and wherein, if the total amount of all radically polymerizable monomers in the oil-in-water microemulsion is 100 mol%, a molar ratio of the radically polymerizable monomers which are insoluble in water or which have a miscibility gap with water is 75 mol% to 100 mol%, and a molar ratio of other radically polymerizable monomers is 0 mol% to 25 mol%, and the oil-in-water microemulsion is substantially free of any surfactant selected from the group consisting of nonionic surfactants comprising a linear alkyl chain with more than 6 carbon atoms, cationic surfactants and anionic surfactants; and (b) a step of polymerizing the monomers comprised by the oil-in-water microemulsion to provide the polymer dispersion. Moreover, a polymer dispersion and polymer particles are provided which are obtainable by the process in accordance with the invention.

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