摘要:
A cross-linked adhesive composition is provided comprising an epoxidized diene block polymer wherein the polymer is cross-linked through at least some of the epoxy functionality. A process to prepare this polymer is also provided. The preferred polymer is partially hydrogenated and lightly epoxidized. Furthermore, there is provided a viscous block copolymer from which said epoxidized diene block polymer has been derived.
摘要:
A radiation cured adhesive composition comprising a two block copolymer and a multiblock copolymer, each copolymer comprising at least one hydrogenated block of a conjugated diene and a monoalkenyl arene polymer block, a tackifying resin and a di-, tri- or tetra ester of acrylic or methacrylic acid and an at least dihydric aliphatic alcohol.
摘要:
Star polymers of isoprene or butadiene having terminal hydroxyl groups have reduced viscosity when the hydroxyl groups are located on poly-meric arms that are grown from the core of the star molecules. The polymers are useful in making coatings, sealants, and binders.
摘要:
A process for making polymers of conjugated dienes containing hydroxyl groups in the diene blocks, which process comprises (a) making a precursor polymer by polymerizing at least one conjugated diene which leaves 1,2 disubstituted, 1,1 disubstituted, 1,1,2 trisubstituted or tetrasubstituted olefinic unsaturation in the polymer, (b) epoxidizing said precursor polymer such that epoxy groups form at said substituted sites and the amount of epoxy functionality in the polymer is from 0.1 to 5 meq/g polymer, and (c) contacting the epoxidized polymer with an alcohol having one unprotected hydroxyl group and either a compound of general formula MX n , wherein M is selected from the group consisting of hydrogen, boron, aluminium, iron and tin; X is a halogen; and n is an integer corresponding with the valence of M, or an organic complex thereof. A conjugated diene block copolymer containing 0.1 to 15 meq/g polymer of hydroxyl groups, which polymer is comprised of alcohol groups of the formula
wherein P is -OH, -CI or -OR with R being selected from the group consisting of alkyl radicals containing up to 10 carbon atoms, monohydric and dihydric alcohol groups and carbonate groups; Q is -OH or Cl with the proviso that at least one of P and Q is -OH and R 1 and R 2 are hydrogen or alkyl radicals with the proviso that if P is -OR only one of R 1 and R 2 can be hydrogen.
摘要:
A viscous block copolymer of the formula: (A-B-A p ) n -Y r -(A q -B) 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 diene monomers, copolymer blocks of conjugated diene monomers or copolymer blocks of conjugated diene monomers and monoalkenyl aromatic hydrocarbon monomers, and wherein the A blocks have a greater number of di- and/or tetra-substituted unsaturation sites per unit of block mass than do the B blocks, wherein the number of tertiary unsaturation (TU) sites in the A blocks is lower than or equal to that number of the B blocks and wherein the A blocks have a molecular weight from 100 to 3000 and the B blocks have a molecular weight from 1000 to 15,000, and wherein p and q are 0 or 1 and n > 0, r is 0 or 1, m ≧ 0 and n + m ranges from 1 to 100.
摘要:
A process for making polymers of conjugated dienes containing hydroxyl groups in the diene blocks, which process comprises
(a) making a precursor polymer by polymerizing at least one conjugated diene which leaves 1,2 disubstituted, 1,1 disubstituted, 1,1,2 trisubstituted or tetrasubstituted olefinic unsaturation in the polymer, (b) epoxidizing said precursor polymer such that epoxy groups form at said substituted sites and the amount of epoxy functionality in the polymer is from 0.1 to 5 meq/g polymer, and (c) contacting the epoxidized polymer with an alcohol having one unprotected hydroxyl group and either a compound of general formula MX n , wherein M is selected from the group consisting of hydrogen, boron, aluminium, iron and tin; X is a halogen; and n is an integer corresponding with the valence of M, or an organic complex thereof.
A conjugated diene block copolymer containing 0.1 to 15 meq/g polymer of hydroxyl groups, which polymer is comprised of alcohol groups of the formula
wherein P is -OH, -CI or -OR with R being selected from the group consisting of alkyl radicals containing up to 10 carbon atoms, monohydric and dihydric alcohol groups and carbonate groups; Q is -OH or Cl with the proviso that at least one of P and Q is -OH and R 1 and R 2 are hydrogen or alkyl radicals with the proviso that if P is -OR only one of R 1 and R 2 can be hydrogen.
摘要:
This invention is a method of curing epoxidized diene polymers which do not have a significant amount of functional groups which undergo a cross-linking reaction with amino resins and which have at least 50 olefinic epoxy groups which are predominately sterically hindered and which comprise at least one conjugated diolefin monomer, said method comprising mixing said polymer with an amino resin in the presence of a proton-donating acid catalyst.