Invention Grant
- Patent Title: Preparation of coating dispersions
- Patent Title (中): 涂料分散体的制备
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Application No.: US13746019Application Date: 2013-01-21
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Publication No.: US08926747B2Publication Date: 2015-01-06
- Inventor: Dieter Münchow
- Applicant: Alpha Calcit Füllstoff Gesellschaft mbH
- Applicant Address: DE Cologne
- Assignee: Alpha Calcit Fullstoff Gesellschaft MGH
- Current Assignee: Alpha Calcit Fullstoff Gesellschaft MGH
- Current Assignee Address: DE Cologne
- Agency: Clements Bernard PLLC
- Agent Gregory N. Clements
- Priority: EP07110917 20070622
- Main IPC: C09C1/02
- IPC: C09C1/02 ; C08K3/26 ; D21H19/38 ; D21H19/00 ; D21H21/52
Abstract:
The invention relates to a process for the preparation of coating dispersions for use in the paper industry by co-grinding natural calcium carbonate (GCC) and precipitated calcium carbonate (PCC), characterized in that powdery GCC is co-ground with a slurry containing from 5 to 70% by weight of PCC to obtain a particle size distribution of the calcium carbonate with at least 90% by weight of smaller than 5 μm, at least 70% by weight of smaller than 2 μm, and at least 20% by weight of smaller than 1 μm, with a weight average particle size within a range of from 0.7 to 3 μm.
Public/Granted literature
- US20130131249A1 PREPARATION OF COATING DISPERSIONS Public/Granted day:2013-05-23
Information query
