摘要:
Prepn. of a hot melt adhesive compsn. by: (a) combining a starch ester in wet-cake form having deg. of substitution (DS) 0.3 - 3.0 and moisture content at least 40 wt.% and a compatible non-volatile polar organic diluent; and (b) heating for sufficient time to boil off essentially all moisture leaving a compsn. contg. less than 2 wt.% moisture. Also claimed is prepn. of a starch based hot melt adhesive compsn. by: (a) extruding a starch ester in wet-cake or dry form having DS 0.3 - 3.0 and moisture content 1 wt.% or more combined with a compatible non-volatile polar organic diluent; and (b) heating and conveying the combined starch ester and diluent mixt. to a sufficient temp. to boil off essentially all water and recover the final prod. exiting the extruder having moisture content below 2 wt.%.
摘要:
An inorganic-organic composite comprises an inorganic phase, such as gypsum crystals, and a film forming organic phase. The film forming organic phase is selected from substituted starches having a degree of polymerization; degree of substitution and viscosity such that the substituted starches are insoluble in water during mixing but dissolve at a higher processing temperature during forming, setting or dryiing of the composite. Thus, excessive migration of the substitute starch is prevented and the composite is substantially strengthened.
摘要:
An in situ ionic interaction between two additives, one a cationic strength enhancing additive and one an anionic crosslinking additive, is used to improve the mechanical properties of an article formed from a composite material. The composite has a discrete phase bound together with a film of the additives, such as gypsum crystals bound together by a film of substituted starch or cellulose ether.
摘要:
The present disclosure relates to protein-starch compositions. The disclosure also relates to processes for preparing the protein-starch compositions. Further, the disclosure relates to uses of the protein-starch compositions in the preparation of adhesives or binders. Further, the disclosure relates to adhesive formulations that include protein-starch containing compositions and to paper products resulting from the processes herein.