摘要:
An aqueous coating composition comprising an autoxidisable polyester resin having ≧30 wt % of fatty acid residues; a Tg in the range of from −60° C. to +35° C.; an acid value greater than 15 mg KOH/g and less than 75 mg KOH/g; a Mw in the range of from 2,500 to 100,000 g/mol; said composition having a co-solvent content less that 15 wt % by weight of total composition; a solids content >30 wt %; and when a film, a telegraphing value of less than 20 gloss units.
摘要:
An aqueous solution coating composition comprising an autoxidisable polyvinyl polymer having ≧20% of fatty acid residue by weight of polymer; Tg from −60 to +15° C.; acid value of 15 to 75 mg KOH/g, Mw from 2500 to 100000 g/mol; polydispersity ≦30, said composition having ≦25% co-solvent by weight of solids, ≧30% solids by weight of composition; said composition when in the form of a coating having a telegraphing value defined as the difference in gloss at a 20° angle of between a film cast on rough PVC and a film cast on smooth PVC of 10 gloss units.
摘要:
An aqueous emulsion coating composition comprising an autoxidisable vinyl oligomer having ≧20 wt % of unsaturated fatty acid residue; Tg from −50 to +15° C.; Mw from 2,500 to 40,000 g/mol; polydispersity from 2 to 12, said composition having ≦15% co-solvent by weight of solids, ≦13% NMP by weight of solids ≧38% solids by weight of composition; said composition when in the form of a coating having a telegraphing value defined as the difference in gloss at a 20° angle of between a film cast on rough PVC and a film cast on smooth PVC of 10 gloss units.
摘要:
There is described (pref. non-adhesive) coating compositions (which may be either water or solvent borne) that comprise an autoxidisable vinyl polymer, the autoxidisable polymer having a vinyl polymer backbone 25% to 75% by wt of the autoxidisable polymer; fatty acid residue 25% to 75% by wt of the autoxidisable polymer; Tg from −60° C. to +20° C., Mw from 3500 to 50000 g/mol; and polydispersity from 2 to 10; the autoxidisable polymer obtained by a process of: (A) polymerising ethylenically unsaturated vinyl monomers comprising: at least one epoxy functional vinyl monomer 15% to 100% by wt total monomers in (A); 0 to 85% of at least one other ethylenically unsaturated vinyl monomer, (preferably other than styrenic monomers) by wt total monomers in (A); (B) reacting the epoxy functional polymer from (A) with fatty acids having an average iodine value from 30 to 250 g I2/100 g fatty acid; where composition has: a) a opt. co-solvent content 40% by wt of the composition; b) a solids content either 30% (aqueous) 60% (solvent based) by wt of the composition, the composition as a coating film having a telegraphing value of less than 10 gloss units (difference between an initial smooth gloss minus an initial rough gloss of the film).
摘要:
A process for obtaining an aqueous emulsion comprising a block copolymer by the solution polymerisation of vinyl monomers to obtain block [B] in the presence of a) a radical precursor; and b) an iodine atom containing block [A]; where block [A] and [B] together comprise 0 to 2 wt % of methacrylic acid; where block [A] and block [B] together comprise ≧2.5 wt % of vinyl monomers bearing ionic or potentially ionic water-dispersing groups not including methacrylic acid; and performing a post polymerisation reaction on the block copolymer emulsion obtained in step II; and wherein said aqueous emulsion has a free vinyl monomer level
摘要:
A radiation curable composition comprising 15 to 85 wt % of at least one solvent comprising ≦20 wt % of water; 5 to 50 wt % of at least one radiation curable material having a Mn in the range of from 50 to 10,000 g/mol; and 10 to 70 wt % of at least one polyurethane having a Mw in the range of from 4,000 to 70,000 g/mol, the polyurethane having 0 to 5 wt % of isocyanate-reactive component(s) bearing ionic or potentially ionic water-dispersing groups and a free isocyanate group content ≦0.5 wt %.
摘要:
An aqueous emulsion comprising at least a covalently bound vinyl oligomer and vinyl polymer, wherein said vinyl oligomer comprises 5 to 85 mol % of vinyl monomers bearing quaternary ammonium ion functional groups or quaternisable amine functional groups and is obtained by a controlled radical polymerisation of at least one vinyl monomer via a reversible addition-fragmentation chain transfer mechanism in solution in the presence of a control agent and a source of free radicals; wherein said vinyl polymer is obtained by emulsion polymerisation of vinyl monomers in the presence of the vinyl oligomer; wherein the weight % ratio of vinyl oligomer to vinyl polymer is in the range of from 0.5:99.5 to 65:35.
摘要:
A radiation curable composition comprising 15 to 85 wt % of at least one solvent comprising ≦20 wt % of water; 5 to 50 wt % of at least one radiation curable material having a Mn in the range of from 50 to 10,000 g/mol; and 10 to 70 wt % of at least one polyurethane having a Mw in the range of from 4,000 to 70,000 g/mol, the polyurethane having 0 to 5 wt % of isocyanate-reactive component(s) bearing ionic or potentially ionic water-dispersing groups and a free isocyanate group content≦0.5 wt %.