摘要:
The invention relates to a process for the preparation of a gas barrier film, comprising 1) providing an olefin copolymer comprising: (i) recurring units A derived from an olefin and (ii) recurring units B derived from a compound according to formula (I), (II) or (III): (I) wherein R 1 is selected from -H or -CH 3 ; R 2 is selected from -0-, -(CO)-(NH)- or -(CO)-O-; R 3 is a moiety comprising 1 -30 carbon atoms; and n is an integer between 1 and 10, (II) wherein R 1 is selected from -H or -CH 3 and p is an integer between 1 and 10, (III) wherein R 1 is selected from -H or -CH 3 and q is an integer between 1 and 10, 2) grafting a graft compound represented by the formula (IV) or (V) to the olefin copolymer (IV) wherein R 4 is independently -H, C1 -C10 linear, branched or cyclic alkyl; X is -NH- or -O- and R 5 is represented by the formula: (A) where r is an integer between 1 and 20; Y is -NCO, halogen (I, Br, CI, F), -Si(OMe) 3 , -N=C=S, -N 3 , -COOH, an amino acid or an amino ester, (V) wherein each of R 6 , R 7 , R 8 and R 9 is independently -H, C1 -C10 linear, branched or cyclic alkyl; X is -NH- or -O- and R 5 is represented by the formula: (A) where r is an integer between 1 and 20; Y is -NCO, halogen (I, Br, CI, F), -Si(OMe) 3 , -N=C=S, -N 3 , -COOH, an amino acid or an amino ester and 3) shaping the grafted polymer obtained by step 2) into a film.
摘要:
Copolymers prepared by a reaction of (1) an unactivated olefin, (2) an activated olefin, and (3) a hydroxyl functional activated olefin and/or a hydroxyl functional unactivated olefin are described. The copolymers have a backbone of polar vinyl monomers and non-polar alkene monomers, with pendant hydroxyl functional groups. The copolymers are well suited for optically clear, pressure sensitive, polyurethane and/or barrier adhesives.
摘要:
A process for providing one or more thermoset polymeric materials onto an object is disclosed wherein said process comprises at least the following steps: - Providing a polymeric composition having a viscosity > 10 Pa.s at room temperature comprising at least one cross-linkable polymeric material; and then - Optionally heating the polymeric composition to achieve a liquid cross-linkable polymeric composition having a viscosity below 4 Pa.s, and then - Depositing the polymeric composition onto an object using a spray, swirl or extrusion nozzle and wherein the deposition is performed while the object and/or nozzle are moving to create an object at least partly coated with said polymeric composition; and then - Optionally cooling down the at least partly coated object to room temperature, and then - Optionally repeating one of foregoing steps, and then - Applying a cross-linking treatment selected from radical curing, UV curing and/or heat treatment in order to convert the cross-linkable polymeric material(s) into thermoset polymeric material(s).
摘要:
Branched, hydroxy-functional (meth)acrylate copolymers having anti-sag properties are disclosed. The copolymers are used in clearcoat applications as a replacement for fumed silica and cellulose butyrate acetate.
摘要:
An aqueous coating composition is provided that is preferably substantially free of bisphenol A. The coating composition is preferably a latex -based coating composition that includes a latex polymer formed from ingredients including an anionic and/or zwitterionic surfactant that includes one or more acid groups neutralized with a metallic base. The coating composition is useful in coating metal substrates such as, for example, interior and/or exterior surfaces of food or beverage containers.
摘要:
The present invention provides multilayer coated substrates, prepared using primer and/or sealer compositions comprising waterborne curable film-forming compositions, in turn comprising: a) an aqueous dispersion of a pigment and i) polymeric urethane-shell particles having a core-shell morphology and having hydroxyl functional groups, wherein the core is prepared from a monomer mixture comprising hydrophobic, ethylenically unsaturated monomers and the shell comprises a polyurethane or polyurethane-urea polymer; or ii) polymeric acrylic-shell particles having a core-shell morphology and having hydroxyl functional groups, wherein the core is prepared from a monomer mixture comprising hydrophobic, ethylenically unsaturated monomers and the shell is prepared from a monomer mixture comprising hydrophilic, ethylenically unsaturated monomers; b) a polyisocyanate crosslinking agent; and optionally c) a hydroxyl functional, water dispersible acrylic polymer.
摘要:
The present invention provides low tack, low temperature flexible aqueous caulk or sealant compositions comprising multistage aqueous emulsion copolymers having a hard stage and a soft stage, the soft stage including, in copolymerized form, one or more nonionic monomers and (i) methacrylic acid (MAA) or a salt thereof and a second acid monomer having a lower pKa than methacrylic acid or a salt thereof, or (ii) a copolymer having a mixture of acid or salt groups and hydroxyl groups, the acid groups chosen from, in copolymerized form, MAA and the second acid monomer, or salts thereof; and the hard stage having a weight average molecular weight (Mw) by gel permeation chromatography (GPC) against polystyrene standards of from 20,000 to 70,000.
摘要:
An optically clear adhesive composition is provided that is derived from precursors that include from about 0 to about 50 parts by weight of an alkyl acrylate having 1-11 carbon atoms in the alkyl group, from about 40 to about 95 parts by weight of an alkyl acrylate having 12 or more carbon atoms in the alkyl group, from about 5 to about 20 parts by weight of a copolymerizable polar monomer, and an initiator. The adhesive composition has a moisture content of less than about 1.0% when the adhesive is positioned in between two release films and placed in an environment of 85C/85% relative humidity for 72 hours and then cooled down to room temperature. Moreover, when the adhesive composition is placed between two transparent substrates and made into a laminate, the laminate has a haze value of less than about 5% after the laminate is placed in an environment of 85C/85% relative humidity for 72 hours and then cooled down to room temperature.