公开(公告)号：US3300360A

公开(公告)日：1967-01-24

申请号：US31778763

申请日：1963-10-21

Applicant: NAT STARCH CHEM CORP

Inventor： WILLIAMS ROBERT H ,  HICKEY LAWRENCE J

IPC: C09J103/02

CPC classification number: C09J103/02

公开(公告)号：US3222199A

公开(公告)日：1965-12-07

申请号：US19233462

申请日：1962-05-04

Applicant: NAT STARCH CHEM CORP

Inventor： HICKEY LAWRENCE J

IPC: C09J103/12

CPC classification number: C09J103/12 ,  C08L2666/28

Abstract: An amylose aqueous dispersion of pH at least 9.5 contains (a) paraformaldehyde or an operable equivalent consisting of glyoxal, an aqueous solution of formaldehyde or methanolstabilized formaldehyde, or a non-polymerized urea-formaldehyde concentrate, and (b) urea or an operable equivalent consisting of succinamide, adipamide, or a basic nitrogen-containing compound which forms an N-methylol derivative with formaldehyde. The amylose may be pure amylose separated from a starch or may be a high-amylose starch containing at least 55% of amylose. Addition of the ureaparaformaldehyde system to the amylose dispersion stabilizes it against precipitation, and allows it to be used in adhesive formulations. The dispersion may also contain, as partial replacements of the urea, paraformaldehyde or operable equivalents, glyoxal, acetaldehyde, furfural, benzaldehyde, thiourea, a cyclic urea compound, a trimethylol alkyl or aryl compound, dicyandiamide, melamine, hydrazine hydrate, morpholine, ethylene glycol, a watersoluble alcohol, a ketone or a primary or secondary amine. The proportions of paraformaldehyde and urea (or operable equivalents) may be as much as 200 parts per 100 parts of amylose. Stabilizing salts may be added e.g. ammonium salts or chlorides, nitrates and acetates of alkali or alkaline earth metals. The alkaline pH of the dispersion may be maintained by addition of e.g. sodium and potassium hydroxides, or sodium carbonate silicate or phosphate. Formulation of an adhesive composition may be completed by adding to the stabilized amylose dispersion a filler e.g. clay, resins, and raw starch. In an example, a slurry of amylose, water and paraformaldehyde is heated to 330 DEG F. under pressure, cooled to 160 DEG F., and mixed at 160 DEG F. with urea and an alkali.

公开(公告)号：US3284381A

公开(公告)日：1966-11-08

申请号：US19502962

申请日：1962-05-14

Applicant: NAT STARCH CHEM CORP

Inventor： HICKEY LAWRENCE J ,  WILLIAMS ROBERT H ,  MAZZARELLA EMIL D

IPC: C08L3/12 ,  C09J103/12

CPC classification number: C08L3/12 ,  C09J103/12 ,  Y10T428/31964

公开(公告)号：US3179529A

公开(公告)日：1965-04-20

申请号：US17826262

申请日：1962-03-08

Applicant: NAT STARCH CHEM CORP

Inventor： HICKEY LAWRENCE J ,  MAZZARELLA EMIL D

IPC: C04B24/38

CPC classification number: C04B24/383 ,  C04B2111/0062 ,  Y10T428/31975