Patent · US Expired

Polyisocyanate addition products useful as mold release agents and a process for their production

US4478893A · kind A · utility

11Cited by

7References

6Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Manfred Schonfelder · Leverkusen, DE
Peter Haas · Brisbane, AU
Geza Avar · Leverkusen, DE
Helmut Steinberger · Leverkusen, DE

Key dates

Filing date	Oct 6, 1983
Grant date	Oct 23, 1984
Priority date	—
Expiry date	Oct 6, 2003

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2125/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Polyisocyanate addition products are made by reacting a polysiloxane having isocyanate reactive end groups, excess polyisocyanate and a compound selected from the group consisting of aliphatic alcohols, primary aliphatic amines, secondary aliphatic amines and mixtures thereof having a molecular weight of from 75 to 5000 and at least one tertiary amino group and/or oxyalkylene unit. In a preferred embodiment, the polysiloxane is reacted with excess polyisocyanate and the reaction product is subsequently reacted with the alcohol and/or amine. The addition products of this invention are particularly useful as mold release agents in the production of molded lacquer coated plastics by the "in-mold coating process."

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