Home

Primary Examiner: Anderson, Harold D.
Assistant Examiner:
Attorney: Stevens, Davis, Miller & Mosher

Next ten patents ordered by date:

Preparation of high molecular weight polymer from oxalic acid and para-phenylene diisocyanate
Process for the production of basic modified polyamides
Powder paint with epoxy and hydroxy copolymer and mixture of dicarboxylic acids and polyanhydrides
Block copolymers containing olefin sulfur dioxide segments and process for their preparation
Powdered rubber
Process for preparing low bulk viscosity polymers
Peroxide co-initiator system for polymerization
Polymeric materials derived from ring-opening polymerization of 1,5-cyclooctadiene
Bleomycinic acid and process for preparing thereof
Sulfo phenyl-azo-sulro phenyl-azo-alkoxy-diphenyl compounds

Translate:
En
De
Es
Fr
It
Pt
Ja
Ko
Zh

Title: Production of polyamides in the presence of a phosphorus acid ester and an organic base

Abstract: Polyamides are produced by reacting a dicarboxylic acid with a diamine or polycondensing an amino acid in the presence of a phosphorous acid ester of the formula, R.sup.3.R.sup.4.HPO.sub.3, wherein R.sup.3 and R.sup.4 may be the same or different and are individually an alkyl, aralkyl or aromatic group which may have at least one substituent, such as diphenyl phosphite, and an organic base such as pyridine.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Yamazaki, Noboru (Tokyo, JA)
Higashi, Fukuji (Tokyo, JA)

Application Number: 405906
Filing Date: 1973-10-12
Publication_date: 1976-01-13
Assignee: Sumitomo Chemical Company, Limited (Osaka, JA)
Primary Class(es): 528/336 524/139, 524/147, 524/151, 524/607, 524/710, 524/838, 528/179, 528/184, 528/185, 528/310, 528/313, 528/328, 528/331, 528/335, 528/337, 528/347, 528/349
Other Classes:
US Patent Ref:
Other Refs: Other References: floyd- Polyamide Resins, Second Edition, 1966, pp. 48-49.