摘要:
A method of making a copolymer composition containing a copolymer, which includes the steps of (a) providing a donor monomer composition that includes an isobutylene type monomer; (b) mixing the donor monomer composition with an ethylenically unsaturated monomer composition that includes one or more ethylenically unsaturated acceptor monomers, and is substantially free of maleate type monomers and fumarate type monomers, and (c) polymerizing the mixture resulting from step (b) in the presence of a free radical polymerization initiator. The polymerization is carried out in the substantial absence of Lewis acids and/or transition metals. The isobutylene type monomer is present at a molar excess of at least 10 mol % based on the molar concentration of monomers in the ethylenically unsaturated monomer composition. The ethylenically unsaturated acceptor monomers are present in an amount of at least 15 mol % of the total monomer composition.
摘要:
A non-gelled copolymer is prepared from: I) at least one ethylenically unsaturated aliphatic or aromatic monomer that is unsubstituted with reactive functionality and/or has hydroxyl functionality, II) an ethylenically unsaturated monomer having one acid functional group; and III) an ethylenically unsaturated oligomeric monomer having a number average molecular weight of about 1500 to about 4000 and which is derived from a hydroxyl functional acid having a predominantly hydrocarbon chain of from about 10 to 19 carbon atoms. The amounts of the monomers based upon the total solid weight of reactants used to prepare the copolymer are: about 80 to about 95 for I; about 3 to about 6 percent for II; and about 2 to about 14 percent for III. The ungelled copolymer can be present with hydrophobic amorphous fumed silica in amounts of about 50 to about 90 for the copolymer and about 10 to about 50 all as percentages by weight based on the weight of the two components. The ungelled copolymer alone or with the silica can be present along with coating components like film forming polymers, aqueous and/or organic solvent vehicles and optionally one or more pigments. In the colored and/or clear coating compositions and in the methods of their application to substrates, the amount of the silica is up to about 2.5 percent by weight, and the ratio of the copolymer to the silica is generally in the range of from about 9:1 to 1:1 to yield coatings with good rheology control.
摘要:
The present invention is directed to a substantially pigment-free coating composition with good cure response and improved appearance. In particular, the substantially pigment-free coating composition may comprise (a) at least one functional polymer containing amine groups and groups selected from hydroxyl and carbamate; and (b) a crosslinking agent.
摘要:
Fluoropolymers are disclosed. The fluoropolymers include (i) units derived from a fluoromonomer having the formula F2C═CXY, where X is CF3 and Y is either F or CF3, and (ii) units derived from at least one donor monomer. In the disclosed fluoropolymers, units (i) and (ii) are distributed along the fluoropolymer chain in a substantially alternating fashion. Also disclosed are thermosetting compositions containing such fluoropolymers, substrates coated with such compositions, methods for making such compositions, and methods for coating substrates with such compositions.
摘要:
A thermosetting composition that includes an ungelled copolymer composition and a crosslinking agent. The ungelled copolymer composition includes a functional group-containing copolymer that includes segments of alternating residues derived from a donor monomer composition comprising an acceptor monomer composition. The donor monomer composition includes one or both of isobutylene and diisobutylene, and the acceptor monomer composition includes acrylic monomers and monomers containing functional groups. The ungelled copolymer composition is substantially free of transition metals and Lewis acids, and the copolymer is substantially free of maleate-type monomer residues and fumarate-type monomer residues. The crosslinking agent has at least two functional groups that are reactive with the functional groups of the copolymer. The thermosetting composition may be in liquid, powder, or dispersed form and may be applied by traditional or electrocoating methods.
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. The composition provides improved cure response and appearance properties when electrodeposited over conductive substrates.
摘要:
The present invention is directed to copolymers, which are polymerization products of: (i) a monomer having alpha-olefinic functionality; (ii) a monomer different from (i) having active hydrogen functionality; and (iii) a monomer different from (ii) having acrylic functionality. The molar ratio of the monomer (i) having alpha-olefinic functionality to the monomer (iii) having acrylic functionality is less than 1:1, and the conversion of the monomer (i) having alpha-olefinic functionality during polymerization is greater than 90%. When monomers having methacrylic functionality are used to prepare the copolymer, the molar ratio of the monomer (iii) having acrylic functionality to the monomers having methacrylic functionality is greater than 2:1. Also disclosed are curable film-forming compositions comprising the copolymers.
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:
Fluoropolymers are disclosed. The fluoropolymers include (i) units derived from a fluoromonomer composition comprising chlorotrifluoroethylene, and (ii) units derived from at least one donor monomer composition. In the disclosed fluoropolymers, units (i) and (ii) are distributed along the fluoropolymer chain in a substantially alternating fashion. Also disclosed are thermosetting compositions containing such fluoropolymers, substrates coated with such compositions, methods for making such compositions, and methods for coating substrates with such compositions.
摘要:
A composition that includes a fluorine-containing copolymer containing at least 30 mol % of residues having the following alternating structural unit: —[DM—AM]— where DM represents a residue from a donor monomer having the following structure (I): where R1 is linear or branched C1 to C4 alkyl; R2 is selected from methyl, linear, cyclic or branched C1 to C20 alkyl, alkenyl, aryl, alkaryl and aralkyl; and AM represents an acceptor monomer. The copolymer contains at least 5 wt. % fluorine. The composition may include co-reactive functional groups and may be a thermosetting composition, which can be used to coat a substrate. The thermosetting composition may be part of a multi-component composite coating composition that includes a base coat deposited from a pigmented film-forming composition and a substantially pigment free top coat applied over at least a portion of the base coat.