Abstract:
A crosslinkable waterborne dispersion of a hydroxy functional polydiene polymer composition which comprises: (a) 10 to 65% w of a hydroxy functional polydiene polymer, (b) 0.2 to 25% w of a compatible amino resin, (c) 0.1 to 10% w of a surfactant which is nonionic or anionic and has a volatile cation, and (d) the balance water. The invention also describes a water-continuous process and an inversion processes for making such dispersions.
Abstract:
A crosslinkable waterborne dispersion of a hydroxy functional polydiene polymer composition which comprises: (a) 10 to 65% w of a hydroxy functional polydiene polymer, (b) 0.2 to 25% w of a compatible amino resin, (c) 0.1 to 10% w of a surfactant which is nonionic or anionic and has a volatile cation, and (d) the balance water. The invention also describes a water-continuous process and an inversion processes for making such dispersions.
Abstract:
A viscous block copolymer of the formula (A-B-A.sub.p).sub.n -Y.sub.r -(A.sub.q -B).sub.m wherein Y is a coupling agent or coupling monomers, and wherein A and B are polymer blocks which may be homopolymer blocks of conjugated diolefin monomers, copolymer blocks of conjugated diolefin monomers or copolymer blocks of conjugated diolefin monomers and monoalkenyl aromatic hydrocarbon monomers, and wherein the A blocks have a higher number of more highly substituted aliphatic double bonds per unit of block mass than do the B blocks, and wherein the A blocks have a molecular weight from about 100 to about 3000 and the B blocks have a molecular weight from about 1000 to about 15,000, and wherein p and q are 0 or 1 and n>0, r is 0 or 1, m.gtoreq.0 and n+m ranges from 1 to 100. This block copolymer is preferably partially hydrogenated, epoxidized and crosslinked through at least some of the epoxy functionality to form an adhesive, coating or sealant composition.
Abstract:
A pressure structural or sealant composition comprises (a) from 15 to 95% by weight of a telechelic polymer such as a glycidyl ether-functional telechelic polymer and from 5 to 85% by weight of a heterotelechelic polydiene block polymer wherein at least one of the functonalities is the same as the functionality of the telechelic polymer, such as a heterotelechelic polydiene block polymer with glycidyl ether and another functionality such as olefinic unsaturation or epoxidized olefin; and (b) a dual curing system wherein one curing agent cures the teolechelic polymer and the common functionality on the heterotelechelic polydiene block polymer such as an aliphatic polyamine, and the other curing agent cures the other functionality on the heterotelechelic polydiene block polymer but does not cure under conditions required to cure the telechelic polymer, such as a sulfur-based curing agent when the functionality is olefinic unsaturation or an amino resin when the functionality is epoxidized olefin.
Abstract:
Pressure sensitive structural adhesive and sealant compositions comprising: (a) a polymer system comprising from 95 to 15 percent by weight of a telechelic polymer and from 5 to 85 percent by weight of a heterotelechelic polymer wherein at least one of the functionalities thereon is the same as the functionality on the telechelic polymer, and (b) a dual curing system wherein one element of the curing system cures the telechelic polymer and the common functionality on the heterotelechelic polymer and the other element cures the functionality on the heterotelechelic polymer but does not cure under the conditions required to cure the telechelic polymer to form a structural adhesive or sealant composition. In a preferred embodiment, the polymer system is comprised of a hydroxyl functional telechelic diol or polyol polymer and the heterotelechelic polymer is a monohydroxylated polydiene polymer which also has epoxidized olefin functionality. The dual curing system preferably is comprised of an isocyanate curing agent to cure through the hydroxyl groups at ambient temperatures to form a pressure sensitive adhesive or sealant and an amino resin to cure through the epoxy functionality upon baking to form a structural adhesive or sealant.
Abstract:
A crosslinkable waterborne dispersion of an epoxidized polydiene block polymer composition which comprises: (a) 10 to 65% w of a polydiene block polymer containing at least five olefinic epoxy groups per molecule which are sterically hindered, (b) 0.2 to 25% w of a compatible aminoplast, (c) 0.1 to 10% w of a surfactant which is nonionic or anionic and has a volatile cation, and (d) the balance water. The invention also describes a water-continuous process and an inversion processes for making such dispersions.
Abstract:
A pressure sensitive structural or sealant composition comprises (a) from 15 to 95% by weight of a telechelic polymer such as a hydroxyl-functional telechelic polymer and from 5 to 85% by weight of a heterotelechelic polydiene block polymer wherein at least one of the functionalities is the same as the functionality of the telechelic polymer, such as a heterotelechelic polydiene block polymer with hydroxyl and glycidyl ether funciontialities, and (b) a dual curing system wherein one curing agent cures the teolechelic polymer and the common functionality on the heterotelechelic polydiene block polymer such as a polyisocyanate, and the other curing agent cures the other functionality on the heterotelechelic polydiene block polymer at higher temperatures but does not cure under conditions required to cure the telechelic polymer, such as a polycarboxylic acid, polycarboxylic acid anhydride or a catalyst.
Abstract:
Pressure sensitive structural adhesive and sealant compositions comprising: (a) a polymer system comprising from 95 to 15 percent by weight of a telechelic polymer and from 5 to 85 percent by weight of a heterotelechelic polymer wherein at least one of the functionalities thereon is the same as the functionality on the telechelic polymer, and (b) a dual curing system wherein one element of the curing system cures the telechelic polymer and the common functionality on the heterotelechelic polymer and the other element cures the functionality on the heterotelechelic polymer but does not cure under the conditions required to cure the telechelic polymer to form a structural adhesive or sealant composition. In a preferred embodiment, the polymer system is comprised of a hydroxyl functional telechelic diol or polyol polymer and the heterotelechelic polymer is a monohydroxylated polydiene polymer which also has epoxidized olefin functionality. The dual curing system preferably is comprised of an isocyanate curing agent to cure through the hydroxyl groups at ambient temperatures to form a pressure sensitive adhesive or sealant and an amino resin to cure through the epoxy functionality upon baking to form a structural adhesive or sealant.
Abstract:
The invention herein relates to unsaturated monohydroxylated polydiene polymers which are comprised of at least two polymerizable ethenically unsaturated hydrocarbon monomers wherein at least one is a diene monomer which yields unsaturation suitable for epoxidation. The invention also encompasses partially hydrogenated and/or epoxidized derivatives of these novel monohydroxylated polydiene polymers. The preferred monohydroxylated polydiene polymer of the present invention has a structural formula (HO)x—A—Sz—B—(OH)y wherein A and B are polymer blocks which may be homopolymer blocks of conjugated diolefin monomers, copolymer blocks of conjugated diolefin monomers, or copolymer blocks of diolefin monomers and monoalkenyl aromatic hydrocarbon monomers. These polymers may contain up to 60% by weight of at least one vinyl aromatic hydrocarbon, preferably styrene. Generally, it is preferred that the A blocks should have a greater concentration of more highly substituted aliphatic double bonds than the B blocks have. Thus, the A blocks have a greater concentration of di-, tri-, or tetra-substituted unsaturation sites (aliphatic double bonds) per unit of block mass than do the B blocks. This produces a polymer wherein the most facile epoxidation occurs in the A blocks. The A blocks have a molecular weight of from 100 to 6000, preferably 500 to 4,000, and most preferably 1000 to 3000, and the B blocks have a molecular weight of from 1000 to 15,000, preferably 2000 to 10,000, and most preferably 3000 to 6000. S is a vinyl aromatic hydrocarbon block which may have a molecular weight of from 100 to 10,000. x and y are 0 or 1. Either x or y must be 1, but only one at a time can be 1. z is 0 or 1. Either the A or the B block may be capped with a miniblock of polymer, 50 to 1000 molecular weight, of a different composition, to compensate for any initiation, tapering due to unfavorable copolymerization rates, or capping difficulties. These polymers may be epoxidized such that they contain from 0.1 to 7.0 milliequivalents (meq) of epoxy per gram of polymer.
Abstract:
A crosslinkble waterborne dispersion useful as a coating on metal substrates of an epoxidized polydiene block polymer composition which comprises: (a) 10 to 65% by weight of a polydiene block polymer containing at least five olefinic epoxy groups per molecule which are sterically hindered, (b) 0.2 to 25% by weight of a compatible aminoplast, (c) 0.1 to 10% by weight of a surfactant which is nonionic or anionic and has a volatile cation, and (d) the balance water. A water-continuous process and an inversion process for making a dispersion are also described.