公开(公告)号：US5484695A

公开(公告)日：1996-01-16

申请号：US198729

申请日：1994-02-18

申请人： Alan R. Pitt ,  Julian C. Caesar ,  Danuta Gibson ,  Trevor J. Wear ,  David J. Young ,  Scott A. King

发明人： Alan R. Pitt ,  Julian C. Caesar ,  Danuta Gibson ,  Trevor J. Wear ,  David J. Young ,  Scott A. King

IPC分类号： B01F17/12 ,  G03C7/388 ,  G03C1/08

CPC分类号： G03C7/388 ,  Y10S516/01 ,  Y10S516/04

摘要： Surfactants useful as dispersing aids in the preparation of compositions comprising a hydrophilic colloid having hydrophobic particles dispersed therein have the structure ##STR1## wherein R is H or methyl provided that when each n=1, each R is methyl;M is a cation; and,n is an integer from 1 to 6.Such surfactants offer coating, photographic property and processing advantages when incorporated in photographic materials comprising a support bearing a plurality of hydrophilic colloid layers including at least one light-sensitive silver halide emulsion layer wherein at least one of the underlying hydrophilic colloid layers of the material contains hydrophobic particles dispersed therein with the aid of the surfactant.

公开(公告)号：US3945798A

公开(公告)日：1976-03-23

申请号：US471637

申请日：1974-05-20

申请人： David J. Young

发明人： David J. Young

IPC分类号： G01N31/22 ,  G01N33/00

CPC分类号： G01N33/0027 ,  G01N31/224 ,  G01N33/0047 ,  Y10T436/202499

摘要： A test element is provided which can detect and measure extremely low concentrations of formaldehyde in the environment. The test strip comprises a support having thereon a formaldehyde-sensitive layer comprising an inert formaldehyde-permeable binder which stabilizes sulphite ions against aerial oxidation having dispersed therein pararosaniline or an acid derivative thereof and sulphite ions. The test element requires no processing and can be fixed to obtain a permanent record.

摘要翻译： 提供了可以在环境中检测和测量极低浓度的甲醛的测试元件。 测试条包括其上具有甲醛敏感层的载体，其包含惰性甲醛可渗透的粘合剂，其将亚硫酸根离子与空间氧化稳定，其中分散有对苯二胺或其酸衍生物和亚硫酸盐离子。 测试元素不需要处理，可以固定，以获得永久记录。