Patent · US Expired

Opaque synthetic resins

US4876311A · kind A · utility

17Cited by

2References

3Claims

0Family size

Assignee

Rohm GmbH Chemische Fabrik · DE

Inventors

Jurgen Hennig · Glückstadt, DE
Heinz Vetter · Weiterstadt, DE
Manfred Munzer · Bensheim, DE

Key dates

Filing date	Mar 1, 1988
Grant date	Oct 24, 1989
Priority date	—
Expiry date	Mar 1, 2008

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2205/22
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The invention relates to opaque synthetic resins containing 1 to 30% by weight of cross-linked beads consisting of a polymer comprised of: PA0 (i) 9.9 to 59.9% by weight of at least one radically polymerizable monomer A containing an aromatic residue or nonaromatic monomers A' which contain a halogen; PA0 (ii) 90 to 40% by weight of vinyl monomers B which are copolymerizable with these monomers but different from them; PA0 (iii) 0.1 to 20% by weight of at least one cross-linking monomer V and PA0 (iv) 0 to 10% by weight of a strongly polar monomer H and where (a) the refractive index of the polymer is higher than that of the polymer matrix and that (b) the average bead size of the beads is in the range of 20 to 50 microns.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.