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Coating for multilayer coatings comprises a (meth)acrylate/vinyl aromatic dispersion, a polyurethane dispersion, a rheology aid, a polysiloxane antifoam agent, hydrophobic solid(s) and polyglycol(s)
Coating for multilayer coatings comprises a (meth)acrylate/vinyl aromatic dispersion, a polyurethane dispersion, a rheology aid, a polysiloxane antifoam agent, hydrophobic solid(s) and polyglycol(s)
Coating comprises: (i) acrylate dispersion of a (meth)acrylate copolymer comprising 1-8C alkyl (meth)acrylates, vinyl aromatic monomers and (meth)acrylic acids; (ii) aqueous dispersion of a polyurethane; (iii) rheology aid; and (iv) mixture of a polysiloxane antifoam agent, hydrophobic solid(s) and polyglycol(s). Coating comprises: (i) an acrylate dispersion of a (meth)acrylate copolymer comprising 30-60 wt.% 1-8C alkyl (meth)acrylates, 30-60 wt.% vinyl aromatic monomers and 0.5-10 wt.% (meth)acrylic acids; (ii) an aqueous dispersion of a polyurethane of Mn 1000-30,000 Da and 0.05-1.1 polymerizable double bonds/mol. and monomer(s) radically polymerized using a water-insoluble initiator(s) in a wt. ratio of polyurethane:monomer(s) of 1:10-10:1; (iii) a rheology aid, preferably a synthetic polymer with ionic and/or associative groups and optionally an inorganic rheology aid; and (iv) a mixture of a polysiloxane antifoam agent, a hydrophobic solid(s) and a polyglycol(s).
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机译： （54）标题：具有硅酸盐涂层的固体颗粒（54）：FESTKoRPERPARTKEL MIT SILKATBESCHICHTUNG（57）摘要：本发明涉及一种具有二氧化硅涂层的固体颗粒的生产方法，其包括以下步骤：将固体颗粒分散为将其涂覆在水性介质中以产生固体颗粒分散体，通过缓冲系统调节固体颗粒分散体的pH以产生缓冲的固体颗粒分散体，并向缓冲的固体颗粒分散体中添加碱性硅酸盐溶液以形成二氧化硅在涂覆期间将其涂覆在固体颗粒上，其中选择缓冲体系和碱性硅酸盐溶液的量，使得在添加碱性硅酸盐溶液之前和在添加完成之后，缓冲的固体颗粒分散体的pH至少为7.0。碱性硅酸盐溶液的最大含量为11.0。固体颗粒优选是无机固体，特别是
