Back to results
US 10,239,988 B2Granted
Urethane vinyl copolymers and impact resistant sheets made therefrom
AssigneeSpartech Corporation
InventorsPavel E. Ilmenev, Carlos B. Guerra
Life of this patent
Estimating the term…
Abstract
Copolymers comprising a polyurethane segment, a polyvinyl segment and a multifunctional monomer having first and second functional groups covalently bound to the polyurethane segment and polyvinyl segment, respectively, are disclosed. Cast sheets formed therefrom exhibit improved high impact resistance and similar optical properties as compared to polyvinyl cast sheets.
Claims21
A copolymer comprising a reaction product of a reaction mixture comprising the components:
- a polyisocyanate having free isocyanate functionality;
- a polyol;
- a vinyl monomer comprising at least one double bond;
- and
- a multifunctional monomer comprising a first functional group having a hydrogen that is reactive with isocyanate and selected from the group consisting of a primary amine, a secondary amine and a hydroxyl and a second functional group comprising at least one double bond reactive with the at least one double bond of the vinyl monomer wherein the resulting copolymer is characterized by an essential absence of free isocyanate, wherein the copolymer comprises a polyurethane segment comprising polymerized polyisocyanate and a polyvinyl segment comprising polymerized vinyl monomer,
- wherein the multifunctional monomer is covalently bound to the polyurethane and polyvinyl segments, and
- wherein the polyurethane segment has a molecular weight of from about 500 to about 5000.
4 more elements
Dependencies are inferred from the claim text.