Heterogeneous polymer latex of relatively hard and relatively soft interpolymers of a monovinylidene aromatic monomer and an aliphatic conjugated diene monomer
US4478974A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1983 |
| Grant date | Oct 23, 1984 |
| Priority date | — |
| Expiry date | Aug 4, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S525/902
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Aqueous latexes of heterogeneous polymer particles comprising (1) a minor portion of a soft interpolymer domain having a glass transition temperature of less than 25.degree. C. and comprising a monovinylidene aromatic monomer such as styrene and an open chain aliphatic conjugated diene such as 1,3-butadiene and (2) a major portion of a relatively hard interpolymer domain having a glass transition temperature greater than 25.degree. C. and comprising a monovinylidene aromatic monomer such as styrene; an open chain aliphatic conjugated diene monomer such as 1,3-butadiene and a functional monomer such as acrylic acid are useful as binders for pigmented paper coating compositions. The coated papers of the invention exhibit an excellent combination of binding strength and stiffness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.