Back to results
US 4,377,667 AGranted
Polyacetal and process of producing same
AssigneeAsahi Kasei Kogyo Kabushiki Kaisha
InventorsHisaya Sakurai, Minoru Hamada, Kazuhiko Matsuzaki
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeAsahi Kasei Kogyo Kabushiki Kaisha
InventorsHisaya Sakurai, Minoru Hamada, Kazuhiko Matsuzaki
Estimating the term…
A polyacetal suitable for moldings which are excellent in lubricity, wear and antistatic properties, which has at least one terminal of its linear polymer molecule capped with an alkylene oxide adduct of an alcohol or a carboxylic acid, which adduct is of the formula ##STR1## wherein R.sub.o is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, R.sub.o 's may be the same or different, R.sub.1 is an alkyl group, substituted alkyl group, aryl group, or substituted aryl group, R.sub.2 is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, m is from 2 to 6, and n is from 1 to 1,000; the number average molecular weight of said polyacetal being in the range from 10,000 to 500,000 excluding the terminal group.
A polyacetal having at least one terminal of its linear polymer molecule capped with an alkylene oxide adduct of an alcohol or a carboxylic acid, which adduct is represented by the general formula ##STR47## wherein R.sub.0 is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, R.sub.0 's may be the same or different, R.sub.1 is an alkyl group, substituted alkyl group, aryl group, or substituted aryl group, R.sub.2 is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, m is from 2 to 6, and n is from 1 to 1,000;
A process for producing a polyacetal, which comprises homopolymerizing formaldehyde or trioxane in the presence of a compound selected from the group of compounds represented by the general formula ##STR51## wherein R.sub.0 is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, R.sub.0 's may be the same or different, R.sub.1 is an alkyl group, substituted alkyl group, aryl group, or substituted aryl group, R.sub.2 is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, R.sub.3 is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, and R.sub.4 is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, m is from 2 to 6, and n is from 1 to 1,000.
A process for producing a polyacetal, which comprises copolymerizing a compound selected from the group consisting of formaldehyde, trioxane and polyoxymethylenes with a cyclic ether in the presence of a compound selected from the group of compounds represented by the general formula ##STR53## wherein R.sub.0 is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, R.sub.0 's may be the same or different, R.sub.1 is an alkyl group, substituted alkyl group, aryl group, or substituted aryl group, R.sub.2 is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, R.sub.3 is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, and R.sub.4 is a hydrogen atom, alkyl group, substituted alkyl group, aryl group, or substituted aryl group, m is from 2 to 6, and n is from 1 to 1,000.
Dependencies are inferred from the claim text.