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Polymeric Schiff's bases containing acetylene terminal groups

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Physically optimized optical disc structure, method and apparatus

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Polycarbonate from carbonyl halide, bischloroformate and dihydric phenol

What is claimed is: 1. High molecular weight thermoplastic aromatic polycarbonate exhibiting ...

Optically isotropic devices

OF THE INVENTION As indicated above, in many optical devices it is important that optical clarity ...

Optical recording disk

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In view of the above, it is an object of the present invention to provide an arm socket that is ...

Method for detecting and separating thermoplastic containers with near infrared fluorosphores

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Digital information recording media and method of using same

OF THE INVENTION The present invention relates in general to a light-stable colorant system that ...

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Pigment preparation

Details

Inventors: Blackburn, John Bryce; Field, Arnold William;
Assignee: Ciba-Geigy Corporation (Ardsley, NY)
Primary Examiner: Douglas; Winston A.
Assistant Examiner: Howard; J. V.
Attorney, Agent or Firm: Cavalieri; Vincent J., Glynn; Michael W.

A pigment composition comprising pigment and at least 5% by weight based on the weight of composition of a complex formed from one or more non ionic polyether surfactants based on ethylene oxide and a polymeric carboxylic acid having a molecular weight of at least 1500.

DETAILED DESCRIPTION We claim: 1.
A pigment composition comprising pigment having deposited thereon at least 5% by weight based on the weight of composition of a complex formed from one or more non ionic polyether surfactants based on ethylene oxide and a polymeric carboxylic acid having a molecular weight of at least 1500.
2.
A composition as claimed in claim 1 which comprises from 70 to 95% by weight of pigment and from 30 to 5% by weight of complex, based on the weight of composition.
3.
A composition as claimed in claim 1 in which the non-ionic surfactant has a molecular weight of from 350 to 8,000,000.
4.
A composition as claimed in claim 3 in which the non-ionic surfactant is poly(ethylene oxide) having an average molecular weight from 600 to 1,000,000, a polyethyleneoxylated alkyl phenol, alcohol or carboxylic acid.
5.
A composition as claimed in claim 3 in which the non-ionic surfactant is a copolymer of ethylene oxide and propylene oxide having a molecular weight of at least 600.
6.
A composition as claimed in claim 3 in which the non-ionic surfactant is ethoxylated nonyl phenol.
7.
A composition as claimed in claim 3 in which the non-ionic surfactant is a mixture of ethoxylated nonyl phenol with a block copolymer of ethylene oxide and propylene oxide.
8.
A composition as claimed in claim 1 in which the polymeric carboxylic acid is polymaleic acid, a copolymer of methacrylic acid or acrylic acid with dodecyl methacrylate, a copolymer of ethylene and maleic anhydride or a copolymer of diisobutylene and maleic anhydride.
9.
A composition as claimed in claim 1 in which the polymeric carboxylic acid is polyacrylic acid or polymethacrylic acid.
10.
A process for the production of a pigment preparation which comprises treating a dispersion of a pigment with at least 5% by weight based on the weight of the pigment of a combination of a non-ionic polyether surfactant based on ethylene oxide and a polymeric carboxylic acid or its salt having a molecular weight of at least 1500 and afterwards reducing the pH to 4 or below, whereby a complex precipitate is formed between the non-ionic surfactant and the polymeric carboxylic acid which is deposited on the pigment, and separating the pigment thus obtained

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