Sumitomo Chemical Company, Limited

Changbo Shim

Toyonari Ito

An object of the present invention is to provide a liquid crystal polyester-containing liquid composition which is capable of producing a prepreg and a resin film in which surface defects are remarkably reduced even in case of drying at high temperature to remove the solvent in the production process. Disclosed Are a liquid crystal polyester-containing liquid composition comprising a liquid crystal polyester, an organic solvent, and one or more kinds of selected leveling agents, wherein the content of the leveling agent is from 0.001 to 2.0 parts by mass based on 100 parts by mass of the total amount of the liquid crystal polyester and the organic solvent; and a method for producing a resin film, which comprises applying the above-described liquid crystal polyester-containing liquid composition on a support, and then removing the solvent from the liquid crystal polyester-containing liquid composition on the support at 50&#xb0; C. or higher.

Liquid crystal polyester-containing liquid composition

A method for producing a laminated base material includes applying a liquid composition containing a solvent and a liquid crystal polyester to a substrate; and forming a covering material by removing the solvent. The substrate includes a conductor forming a circuit pattern on an insulating layer. The liquid composition covers the conductor. The polyester includes 30-50 mol % of (1), 25-35 mol % of (2), and 25-35 mol % of (3):-0-Ar-00-&#x2003;&#x2003;(1)&#x2014;CO&#x2014;Ar-00-&#x2003;&#x2003;(2)&#x2014;X&#x2014;Ar&#x2014;Y&#x2014;&#x2003;&#x2003;(3)

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Tsukuba, Japan

Changbo Shim