Process for warp-free pigmenting of polyolefins
US5274010A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1991 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Jul 5, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for warp-free pigmenting of polyolefins comprising PA1 (A) PA2 (i) adsorbing a polyvinyl alcohol film onto the surface of an organic pigment particle, PA2 (ii) coating the surface of the polyvinyl alcohol coated organic pigment particle with one or more films of linear or branched homopolymers or copolymers selected from the group consisting of acrylic polymers based on acrylic acid, methacrylic acid, alkyl esters of acrylic or methacrylic acid and mixtures thereof, and PA2 (iii) admixing said pigment particles with a polyolefin; or PA1 (B) PA2 (i) adsorbing a film of hydrolysed zirconium acetylacetonate onto the surface of an organic ##STR1## in which R is methyl or ethyl and m is a number from 1 to 6, onto the surface of the hydrolysed zirconium acetylacetonate coated organic pigment particle, (ii) coating the surface of organic pigment particle coated in accordance with step (B)(i) with one or more films of linear or branched homopolymers or copolymers selected from the group consisting of acrylic polymers based on acrylic acid, methacrylic acid, alkyl esters of acrylic or methacrylic acid and mixtures thereof, and PA2 (iii) admixing said pigment particles with a polyo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.