摘要:
The present invention is directed to a method producing bicyclic guanidine comprising heating a cyclic thiourea to a temperature ranging from ≧140° C. in a substantially non-hydrocarbon solvent to form the bicyclic guanidine.
摘要:
A composition that includes a non-gelled copolymer that contains residues having structural units (I): where n is an integer from 1 to 10,000; R1 is linear or branched C1 to C4 alkyl; R2 is selected from the group consisting of methyl, linear, cyclic or branched C2 to C20 alkyl, alkenyl, aryl, alkaryl and aralkyl, and R3 is a group resulting from a post polymerization reaction selected from transesterification, transamidification and hydrolysis with a compound selected from hydroxy functional compounds and amine functional compounds. The composition may contain co-reactive functional groups and may be a thermosetting composition. A substrate may be coated with the thermosetting composition singly or as part of a multi-layer composite coating that includes a base coat layer and a substantially pigment free top coat layer.
摘要翻译:包含含有具有结构单元(I)的残基的非胶凝共聚物的组合物:其中n为1至10,000的整数; R1是直链或支链C1-C4烷基; R 2选自甲基,直链,环状或支链C 2至C 20烷基,烯基,芳基,烷芳基和芳烷基,并且R 3是由选择酯交换,转酰胺化和水解的后聚合反应得到的基团, 由羟基官能化合物和胺官能化合物组成。 组合物可以含有共反应性官能团并且可以是热固性组合物。 基材可以单独地涂覆有热固性组合物,或者作为多层复合涂层的一部分,其包括底涂层和基本上不含颜料的顶涂层。
摘要:
Modified epoxy resins comprising the reaction product of a cycloaliphatic, polycyclic and/or aromatic biomass derived compound and an epoxy resin are disclosed. Aqueous dispersions and coatings comprising these reaction products are also disclosed.
摘要:
Disclosed are low temperature, moisture curable coating compositions, related coated substrates, and methods for coating a substrate. The coating compositions include an ungelled, secondary amine-containing Michael addition reaction product of reactants including a compound comprising more than one site of ethylenic unsaturation, and an aminofunctional silane.
摘要:
Provided is a method for preparing a circuit assembly. The method includes (a) applying a curable coating composition to a substrate, the curable coating composition formed from (i) one or more active hydrogen-containing resins, (ii) one or more polyester curing agents, and (iii) optionally, one or more transesterification catalysts; (b) curing the curable coating composition to form a coating on the substrate; and (c) applying a conductive layer to the surface of at least part of said cured composition. A circuit assembly prepared by the method also is provided.
摘要:
A curable film-forming composition is provided comprising in a medium (i) 10 to 90 percent by weight based on the total weight of solids in the film-forming composition of a crosslinking agent; (ii) 10 to 90 percent by weight based on the total weight of solids in the film-forming composition of a polymer containing a plurality of functional groups reactive with the crosslinking agent; and (iii) at least 20 percent by volume based on the total volume of the film-forming composition of particles having a mean particle size less than 100 nm. A cured composition comprising the crosslinking agent of (i) and the polymer of (ii) has a cured softening point of less than 30° C. The particles of component (iii) further have a hardness value greater than 5 on the Moh hardness scale, and have an affinity for the medium sufficient to keep the particles suspended therein. The affinity of the particles for the medium is greater than the affinity of the particles for each other, thereby preventing agglomeration of the particles within the medium. Cured compositions having a film thickness of at least 5 microns demonstrate excellent chip resistance, superior sandability and resistance to scratching, water spotting and acid etch.
摘要:
A copolymer composition that includes a copolymer comprised of at least 30 mol % of residues having the following alternating residues from a donor monomer and from an acceptor monomer. The copolymer contains at least 15 mol % of an isobutylene type donor monomer and at least 15 mol % of an acrylic monomer as an acceptor monomer. The copolymer is substantially free of maleate or fumarate monomer segments and the copolymer composition is substantially free of Lewis acids and transition metals. Also disclosed is a thermosetting composition that includes a reactant comprising functional groups, a crosslinking agent having at least two functional groups that are reactive with the functional groups first reactant, and a copolymer flow control agent that includes the copolymer composition as well as substrates coated with the thermosetting composition.
摘要:
A process for applying two electrodeposited coatings, one on top of the other, to an electrically conductive substrate is provided. An electrically conductive first coating is applied to provide for corrosion resistance and a second polyurethane-based coating is applied to the first coating to provide chip resistance. Also, aqueous dispersions of the polyurethane coating compositions are disclosed.
摘要:
Curable film-forming compositions containing epoxy functional copolymers, polycarboxylic acid crosslinking agents, and triaryltin compound having the chemical structure of (Ar).sub.3 SnOR wherein the aryl groups are the same or different and at least one aryl group is substituted with at least one atom or group selected from the group consisting of carbon, nitrogen, oxygen, sulfur, phosphorous, silicon and halogen and R is selected from the group consisting of hydrogen, alkyl, and acyl groups are disclosed. The compositions do not release benzene during cure. The compositions may be powder or liquid and are useful as clear coats, particularly in a color-plus-clear composite coating system.
摘要:
An improved electrodepositable composition is provided comprising: (a) an active hydrogen-containing cationic resin electrodepositable on a cathode; (b) a capped polyisocyanate curing agent; and (c) an organotin-containing catalyst. The improvement comprises the addition to the electrodepositable composition of a water immiscible acid functional compound having a hydrocarbon chain of at least 5 carbon atoms like abietic acid and natural sources thereof. A preferred acid functional compound is abietic acid. The composition provides improved cure response and appearance properties when electrodeposited over conductive substrates.