Polyacetal (co)polymers
AssigneePolyplastics Co., Ltd.
InventorsYoshihisa Tajima, Hiroaki Nakao, Kuniaki Kawaguchi
Life of this patent
Estimating the term…
Abstract
The invention is to provide a polymer, having a high affinity to water, is liquid in spite of being a polymer, simultaneously possesses also a thermal stability and is suitably used as a heating medium or a lubricant. It is the polyacetal (co)polymer, being liquid at room temperature, prepared by copolymerizing (A) 75 to 100 mol % of 1,3-dioxolane and (B) 25 to 0 mol % of trioxane and having the total amount of terminal groups of 15 to 300 mmol/kg and an amount of a hemiformal terminal group of 80 mmol/kg or less.
Claims10
A polyacetal (co)polymer comprised of the (co)polymerization reaction product of (A) 75 to 100 mol % of 1,3-dioxolan and (B) 25 to 0 mol % of trioxane in amounts sufficient to yield a polyacetal (co)polymer which is liquid at room temperature and which contains a total amount of terminal groups of 15 to 300 mmol/kg and an amount of a hemiformal terminal group of 80 mmol/kg or less.
A polyacetal (co)polymer composition comprising the polyacetal (co)polymer as described in claim 1 and 0.1 to 20 weight percent of water.
A process for preparing a polyacetal (co)polymer which is liquid at room temperature, said process comprising (co)polymerizing in the presence of a cationic polymerization catalyst (A) 75 to 100 mol % of 1,3-dioxolane and (B) 25 to 0 mol % of trioxane in amounts sufficient to yield a polyacetal (co)polymer which is liquid at room temperature, and wherein said process further includes polymerizing said 1,3-dioxolane (A) and trioxane (B) in the presence of an amount of an alkoxy group-containing compound such that a total amount of terminal groups of the resulting liquid polyacetal (co)polymer are present in an amount of 15 to 300 mmol/kg and the amount of hemiformal terminal groups are present in an amount of 80 mmol/kg or less.
A polyacetal (co)polymer composition comprising the polyacetal (co)polymer as described in claim 2 and 0.1 to 20 weight percent of water.
Dependencies are inferred from the claim text.