摘要:
The present invention provides a method of coating a packaging container with a coating composition having crosslinkable polyester-polyurethane polymer with at least two carbamate sites, and a crosslinker. The method includes coating a generally planar substrate with the coating composition, curing and forming a container or a portion of a container. The present invention also provides a coating composition and coated substrates.
摘要:
A coating composition for application to primed metal substrates as a topcoat is disclosed. The coating composition is especially useful on metal closures for vacuum-packed food products. The coating composition is free of a halide-containing vinyl-polymer and comprises: (a) an acrylate co-polymer having pendant hydroxy groups, (b) a hydroxy-terminated polyester, (c) a crosslinker, and (d) a nonaqueous carrier.
摘要:
The invention provides a resin composition that is the reaction product of an epoxy resin and an anhydride. The resin composition has an epoxy equivalent weight that is substantially the same as the epoxy equivalent weight of the epoxy resin. The resin composition may be used as a coating composition, or may be mixed with water to form a water based coating composition.
摘要:
Thermosetting polyurethane compositions comprising a polymer having a molecular weight of from 500 to 10,000 and containing from about 0.3 to about 15 percent by weight of one or more functional groups selected from the group consisting of --OH, --COOH, --CONH.sub.2 and ##STR1## and a mixture of monomeric and oligomeric polyfunctional substituted urethane compounds, which may be derived by reaction of a polyol and isocyanic acid, followed by methylolation and alkylation. Such compositions may be cured at elevated temperatures to produce solvent-resistant coatings.
摘要:
Amino-formaldehyde products with activated carboxylic ester groups cross-link compounds containing pendant primary or secondary amine groups.This is a continuation, of application Ser. No. 232,455, filed Feb. 9, 1981, which is a continuation of Ser. No. 128,613, filed 3/10/80, which is a division of Ser. No. 32,982, filed 4/25/79, which is a continuation-in-part of Ser. No. 926,762, filed 7/21/78, all now abandoned.
摘要:
The present invention provides novel packaging articles, e.g., food and beverage cans. Preferred cans typically comprise a body portion and an end portion, wherein at least one of the body and end portions are aluminum and are coated on at least one major surface with a coating composition of the present invention. Suitable coating compositions of the present invention comprise: one or more polyester resins, wherein at least one of the polyester resins has a glass transition temperature (“Tg”) less than about 50° C., and wherein the polyester resin is formed by the reaction of one or more polyacid molecules and one or more polyol molecules; and a crosslinker. The present invention also provides a method of making such cans.
摘要:
A coating composition for application to primed metal substrates as a topcoat is disclosed. The coating composition is especially useful on metal closures for vacuum-packed food products. The coating composition is free of a halide-containing vinyl polymer and comprises: (a) an acrylate co-polymer having pendant hydroxy groups, (b) a hydroxy-terminated polyester, (c) a crosslinker, and (d) a nonaqueous carrier.
摘要:
Novel s-triazine compounds containing at least one N,N-bis(alkoxy or hydroxyalkoxy-carbonyl-amino C.sub.2 -C.sub.10 alkyl) amino substituent function in self-condensation and as cross-linkers for compounds containing active hydrogen groups. The compositions cure to coatings with excellent properties, especially corrosion resistance, humidity resistance, abrasion resistance and flexibility. The coatings have excellent exterior durability.
摘要:
An aliphatic isocyanate compound containing at least one N-methylene isocyanate group of the formula: ##STR1## formed as a reaction product of isocyanic acid and a compound containing at least one N-alkoxymethyl group of the formula: ##STR2## wherein R is C.sub.1 -C.sub.8 alkyl.
摘要:
A cathodically electrodepositable, self-cross-linkable polymer is a hydroxyalkyl carbamate-containing resin having at least one tertiary amine and at least two hydroxyalkyl carbamate groups per molecule. The polymer is made by reacting an epoxy resin having an average epoxy equivalent weight of from about 300 to about 10,000 with one or more amines having at least one secondary amine group and at least one hydroxyalkyl carbamate group or precursor thereof. Hydrophobic amines may be co-reacted to enhance hydrophobicity of the polymer. An electrodeposition bath is made by acidifying the polymer to form an aqueous dispersion. A low temperature-curable coating is attained by utilization of the polymer with a suitable quaternary or ternary compound catalyst.