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公开(公告)号：US09777183B2
公开(公告)日：2017-10-03
申请号：US15156390
申请日：2016-05-17
Applicant: Rohm and Haas Company
Inventor： James C. Bohling , David G. Kelly , Pu Luo , Yogesh Tiwary
IPC: C08F220/18 , C09D133/08 , C09C1/36 , C09D4/00
CPC classification number: C09D133/08 , C08F220/18 , C09C1/3676 , C09D4/00 , C08F220/06
Abstract: The present invention relates to a process for preparing an aqueous dispersion of polymer encapsulated TiO2 particles, comprising a multistage polymerization steps that includes a relatively large amount of low Tg first monomers and a relatively small amount of high Tg second monomers that comprise a relatively high concentration of an acid monomer. The dispersion of encapsulated TiO2 particles shows significantly improved freeze-thaw stability as compared with prior art processes that do not include staging with the second monomers described herein.
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公开(公告)号：US09371466B2
公开(公告)日：2016-06-21
申请号：US14483796
申请日：2014-09-11
Applicant: Rohm and Haas Company
Inventor： Kathleen A. Auld , James Keith Bardman , Michele Heffner , David G. Kelly , Michael Rhodes
CPC classification number: C09D131/04 , C08K3/22 , C08K9/10 , C08K2003/2241 , C09C1/3676 , C09D5/028 , C09D7/62 , Y10T428/2998
Abstract: A process for encapsulating TiO2 particles by polymerizing sodium styrene sulfonate with a redox initiator system; then polymerizing a first monomer mixture comprising at least 60 wt % acrylic monomers; then polymerizing a second monomer mixture comprising at least 40 wt % vinyl ester monomers.
Abstract translation: 一种通过用氧化还原引发剂体系聚合苯乙烯磺酸钠来包封TiO 2颗粒的方法; 然后聚合包含至少60重量％丙烯酸单体的第一单体混合物; 然后聚合包含至少40重量％乙烯基酯单体的第二单体混合物。
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公开(公告)号：US20160152852A1
公开(公告)日：2016-06-02
申请号：US15014069
申请日：2016-02-03
Applicant: Rohm and Haas Company
Inventor： David G. Kelly , Pu Luo , Michael Rhodes , Yogesh Tiwary
IPC: C09D17/00
CPC classification number: C09D17/008 , C08F2/26 , C08F2/44 , C08K9/10 , C08K2003/2241 , C09C1/3676 , C09D1/00 , C09D5/022 , C09D5/024 , C09D5/025 , C09D5/028 , C09D17/002 , C09D141/00
Abstract: The present invention relates to a pre-paint composite comprising an aqueous slurry of TiO2 particles and a polymeric binder, wherein from 35 to 90 weight percent of the polymeric binder is attached to the TiO2 particles, based on the weight of polymeric binder in the pre-paint composite. The pre-composite of the present invention is useful in paint compositions, particularly those that require freeze-thaw stability
Abstract translation: 本发明涉及包含TiO 2颗粒和聚合物粘合剂的水性浆料的预涂料复合物，其中基于聚合物粘合剂的重量，其中35-90重量％的聚合物粘合剂与TiO 2颗粒相连接 - 复合材料。 本发明的预复合材料可用于油漆组合物中，特别是需要冻融稳定性的组合物
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