摘要:
A process for encapsulating a wide variety of target materials, including both hydrophilic and hydrophobic materials, employs condensation of two reactive compounds to form shells around core phase particles including target material dispersed in a continuous phase. One of the reactive compounds has at least two active methylene functional groups per molecule, the other being an active methylene-reactive crosslinking agent. Either type of the reactive compounds can be dispersed in the continuous phase, the other being dispersible in the core phase. Applications include controlled release microencapsulation of agriculture chemicals and biocides.
摘要:
A process for encapsulating a wide variety of target materials, including both hydrophilic and hydrophobic materials, employs condensation of two reactive compounds to form shells around core phase particles including target material dispersed in a continuous phase. One of the reactive compounds has at least two active methylene functional groups per molecule, the other being an active methylene-reactive crosslinking agent. Either type of the reactive compounds can be dispersed in the continuous phase, the other being dispersible in the core phase. Applications include controlled release microencapsulation of agriculture chemicals and biocides.
摘要:
A coating or impregnating composition containing an aqueous dispersion of a vinyl addition polymer and a reactive coalescent is provided. The reactive coalescent contains at least one acetoacetate grouping, or an enamine thereof. In one embodiment the reactive coalescent also functions as an emulsion polymer crosslinker.
摘要:
A coating or impregnating composition containing an aqueous dispersion of a vinyl addition polymer and a reactive coalescent is provided. The reactive coalescent contains at least one acetoacetate grouping, or an enamine thereof. In one embodiment the reactive coalescent also functions as an emulsion polymer crosslinker.
摘要:
This invention is concerned with an article comprising a polyolefin substrate and adherent thereto a vinyl addition polymer of monomers comprising at least 5% by weight a primary monomer selected from(a) monomers having the formula ##STR1## wherein X is --O--, --NH-- or --NR.sup.5 --;R.sup.1 and R.sup.7, individually, are H, methyl or ethyl;R.sup.2 is H or an organic radical, preferably --COOH, --CONH.sub.2 or --COOR.sup.6 ;R.sup.3 is H or an organic radical, preferably methyl, other alkyl having up to about five carbon atoms, --CH.sub.2 COOR.sup.6, --COOR.sup.6 or --CH.sub.2 COOH;R.sup.4 and R.sup.5, individually, are monocyclic alkyl having six or more carbon atoms, acyclic alkyl having nine or more carbon atoms, or alkaryl having nine or more carbon atoms;R.sup.6 is hydrocarbyl, preferably alkyl;n has a value from zero to about ten;(b) vinyl esters of alkanoic acids having at least eight carbon atoms;(c) substituted styrenes wherein the substituent group or groups have a total of three or more carbon atoms;and mixtures thereof; said polymer having surface energy properties such as to form a stable bond with said substrate.The polymer, used alone or in a blend, serves as a coating, a tiecoat, an adhesive or a binder.
摘要:
This invention is concerned with an article comprising an untreated polyolefin substrate and adherent thereto a vinyl addition polymer of monomers comprising at least 5% by weight a primary monomer selected from (a) monomers having the formula ##STR1## wherein X is -O-, -NH- or -NR.sup.5 -; R.sup.1 and R.sup.7, individually, are H, methyl or ethyl; R.sup.2 is H or an organic radical, preferably -COOH, -CONH.sub.2 or -COOR.sup.6 ; R.sup.3 is H or an organic radical, preferably methyl, other alkyl having up to about five carbon atoms, -CH.sub.2 COOR.sup.6, -COOR.sup.6 or -CH.sub.2 COOH; R.sup.4 and R.sup.5, individually, are monocyclic alkyl having six or more carbon atoms, acyclic alkyl having nine or more carbon atoms, or alkaryl having nine or more carbon atoms; R.sup.6 is hydrocarbyl, preferably alkyl; n has a value from zero to about ten; (b) vinyl esters of alkanoic acids having at least eight carbon atoms; (c) alkyl substituted styrenes wherein the substituent group or groups have a total three or more carbon atoms; and mixtures thereof; said polymer having surface energy properties such as to form a stable bond with said substrate. The polymer, used alone or in a blend with other polymers, serves as a coating, a tiecoat, an adhesive or a binder.
摘要:
Abrasive articles comprising a cured thermosetting binder and abrasive grains. The binder is prepared with a poly-functional molecule which contains at least two functional groups selected from the group consisting of carboxyl, anhydride and amine, and a (hydroxyalkyl)urea crosslinking agent containing a single urea group, at least two hydroxyl groups, and have at least two carbon atoms disposed between the urea group and each of the hydroxyl groups. The abrasive articles comprise bonded, nonwoven or coated abrasive articles.
摘要:
A polyurethane, soluble or dispersible in water, prepared from organic diisocyanate diols or other isocyanate reactive materials and a 2,2-hydroxymethyl-substituted carboxylic acid diol neutralized with a cosmetically acceptable organic or inorganic base and formulated into a hair fixative composition containing low amounts of volatile organic solvent. The present invention is also directed to a process for the preparation of polyurethanes comprising dispersing the polyurethane after at least 70% of the theoretical isocyanate reaction has taken place, but before completion of the reaction.
摘要:
A polyurethane, soluble or dispersible in water, prepared from organic diisocyanate diols or other isocyanate reactive materials and a 2,2-hydroxymethyl-substituted carboxylic acid diol neutralized with a cosmetically acceptable organic or inorganic base and formulated into a hair fixative composition containing low amounts of volatile organic solvent. The present invention is also directed to a process for the preparation of polyurethanes comprising dispersing the polyurethane after at least 70% of the theoretical isocyanate reaction has taken place, but before completion of the reaction.
摘要:
A textile treatment composition which imparts anti-wrinkling properties to textiles treated therewith, said textile treatment composition comprising a polyhydroxyalkylurea crosslinking agent having at least two urea moieties. Textiles treated with the compositions of the invention display a significant reduction in wrinkles compared with nontreated textiles. Moreover, the treated textiles have a tactile sensation of feeling soft and retain their smoothness after laundering.