|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|
|§371/§102 date||20050822 (20050822)|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 8 인용 특허 : 42|
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...
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...