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특허 상세정보

Paper coating pigments

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) C09D-001/00    C04B-014/04    C09C-001/02    D21H-011/00   
미국특허분류(USC) 106/486; 106/286.5; 106/463; 106/464; 162/181.8
출원번호 UP-0511203 (2003-01-29)
등록번호 US-7758690 (2010-08-09)
국제출원번호 PCT/US2003/001064 (2003-01-29)
§371/§102 date 20050822 (20050822)
국제공개번호 WO03/093577 (2003-11-13)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
인용정보 피인용 횟수 : 8  인용 특허 : 42
초록

A coating composition for paper and other substrates, particularly mechanical papers such as lightweight coated (LWC) paper, comprises an aqueous suspension of a particulate pigment together with a binder, wherein the particulate pigment comprises: (a) a first component which is a precipitated calcium carbonate consisting predominantly of aragonitic or rhombohedral particle shapes or of aragonitic and rhombohedral particle shapes in a weight ratio of between around 40:60 and about 60:40 (e.g. about 50:50) aragonitic:rhombohedral, and a second component w...

대표
청구항

The invention claimed is: 1. A pigment composition comprising: (a) a precipitated calcium carbonate comprising a mixture of aragonitic particles and rhombohedral particles in a weight ratio ranging from 40:60 to 60:40 based on aragonitic:rhombohedral, and (b) a kaolin clay with a shape factor greater than 25 and a steepness greater than or equal to 20. 2. The composition of claim 1, wherein the precipitated calcium carbonate comprises a predominantly rhombohedral precipitated calcium carbonate. 3. The composition of claim 2, wherein the predominant...

이 특허에 인용된 특허 (42)

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