Polymer coatings
AssigneeImperial Chemical Industries PLC
InventorsAlan Nevin, Ian Shirley
Life of this patent
Estimating the term…
Abstract
A process for the preparation of a polymer composition which comprises a polyarylene which process comprises treating a first composition comprising a polycyclohexadiene, a suitable additive and a solvent for the polycyclohexadiene to a suitable heat treatment such that at least a major portion of the cyclohexenylene rings in the polycyclohexadiene are converted into aromatic groups.
Claims17
A process for the preparation of a polymer composition composed of a polyarylene which process comprises at least the steps of:
- (1) depositing on a substrate a layer composed of a first composition which comprises a polycyclohexadiene, an additive, and a solvent, said solvent for the polycyclohexadiene having a boiling point below 120.degree. C.;
- and
- (2) subjecting said first composition to a heat treatment at a temperature ranging from about 200.degree. C. to 400.degree. C. such that a major portion of the cyclohexenylene rings in the polycyclohexadiene are converted into aromatic groups,
- wherein said additive is an aromatic hydrocarbon or ester which is (a) soluble in the composition employed in said process, (b) is sufficiently involatile so that at least a portion thereof is present in the composition during at least the early stages of said heat treatment step, (c) does not undergo phase separation from the polyarylene at least at the temperatures at which said heat treatment step is conducted, and (d) constitutes between 2 and 20% w/w of said first composition.
A flexible laminated product comprising a layer of polyphenylene and an adhesion enhancing additive adhering to a flexible layer of a suitable substrate, the said additive being (a) aromatic, (b) soluble in a composition comprising polycyclohexadiene and solvent therefor such that cyclohexenylene rings in the polycyclohexadiene are convertible by heat treatment to said polyphenylene, (c) sufficiently involatile such that at least a portion remains in the said composition during the early stages of such heat treatment and such that it (d) does not phase separate from the polyphenylene.
Dependencies are inferred from the claim text.