Abstract:
The current invention relates to a process for preparing an aqueous binder composition, the process comprising at least the following steps A) and B): A) preparing carboxylic acid-functional vinyl polymer (Polymer A) by emulsion polymerisation of a monomer composition A comprising the following monomers: Ai) at least one carboxylic acid functional olefinically unsaturated monomer; and Aii) at least one olefinically unsaturated monomer different than Ai); B) preparing vinyl polymer (Polymer B) by emulsion polymerization of a monomer composition B in the presence of Polymer A where the monomer composition B comprises the following monomer(s): Bi) at least one olefinically unsaturated monomer; Bii) optionally carboxylic acid functional olefinically unsaturated monomer different than Bi); where at least part of the carboxylic acid groups of Polymer A are deprotonated to obtain ionic or potentially ionic water-dispersing groups; where the acid value of Polymer B is lower than the acid value of Polymer A; where the weight average molecular weight (Mw) of Polymer B is higher than the weight average molecular weight (Mw) of Polymer A; where the glass transition temperature of Polymer B is equal to or lower than that of Polymer A; where the weight ratio of Polymer A to Polymer B is in the range of from 5:95 to 95:5; and whereby step A) comprises at least a first polymerisation stage of a monomer composition A1 effected in the presence of a chain transfer agent C1 having a water solubility of at least 5 g/L and a subsequent second polymerisation stage of a monomer composition A2 effected in the presence of a chain transfer agent C2 having a water solubility of at most 0.5 g/L, and whereby the second polymerisation stage of step A) is effected in the optional further presence of chain transfer agent C1 having a water solubility of at least 5 g/L whereby the concentration of chain transfer agent C1 having a water solubility of at least 5 g/L in the second polymerisation stage of step A) is at most 35 mole-%, relative to the total molar concentration of chain transfer agent C1 and chain transfer agent C2 present in the second polymerisation stage of step A).
Abstract:
An aqueous, metal, coating composition (and process for obtaining it) comprising a block copolymer and a polymer P; wherein the block copolymer comprises at least blocks [A] x [B] y , where at least block [A] is obtained by a controlled radical polymerisation of at least one ethylenically unsaturated monomer via a reversible addition-fragmentation chain transfer (RAFT) mechanism in solution in the presence of a control agent and a source of free radicals; and where (a) block [A] comprises (i) 0 to 80 mol% of metal adhering ethylenically unsaturated monomers; (ii) 0 to 100 mol % of water dispersible ethylenically unsaturated monomers; (iii) 0 to 70 mol % of C 1 to C 30 hydrocarbo (meth)acrylate and/or styrenic monomers; (iv) 0 to 35 mol % of ethylenically unsaturated monomer different from i), ii) + iii); where the amount of at least one of i), ii), iii) + iv) is > 0 mol%; block [A] has a Hansch parameter 1 to C 30 hydrocarbo (meth)acrylate and/or styrenic monomers; iv) 0 to 35 mol % of ethylenically unsaturated monomers units different from those from i), ii) + iii); where block [B] has a Hansch parameter ≥ 1.5; and block [B] an average degree of polymerisation y (y ≥ 10 and > x); and (c) polymer P is obtained by an emulsion polymerisation process in the presence of the block copolymer [A][B] and comprises: i) 0 to 5 wt % of metal adhering ethylenically unsaturated monomers; ii) 0 to 15 wt% of water dispersible ethylenically unsaturated monomers; iii) 50 to 100 wt % C 1 to C 30 hydrocarbo (meth)acrylate and/or styrenic monomers; and iv) 0 to 35 % by weight of ethylenically unsaturated monomers units different from those from i), ii) + iii).
Abstract:
A process for preparing an aqueous coating composition comprising a block copolymer and a polymer P; wherein the block copolymer comprises at least blocks [A] x [B] y , where block [A] is obtained by a controlled radical polymerisation of at least one ethylenically unsaturated monomer via a reversible addition-fragmentation chain transfer (RAFT) mechanism in solution in the presence of a control agent and a source of free radicals; and where block [A] has an average degeree of polymerisation (DP) from 3 to 80 and comprises i) 0 to 50 mol % of ethylenically unsaturated monomer unit s bearing adhesion promoting functional groups, ii) 20 to 100 mol % of ethylenically unsaturated monomer unit s bearing water-dispersing functional groups; iii) 0 to 50 mol % of C 1-18 hydrocarbo (meth)acrylate monomers and/or styrenic monomers; and iv) 0 to 35 mol % of ethylenically unsaturated monomers different from i), ii) or iii); where block [B] has a DP ≥ 10; and comprises i) 5 to 60 mol % of ethylenically unsaturated monomer unit s bearing adhesion promoting functional groups; ii) 0 to 15 mol % of ethylenically unsaturated monomer unit s bearing water-dispersing functional groups; iii) 20 to 95 mol % of C 1-18 hydrocarbo (meth)acrylate monomers and/or styrenic monomers; and iv) 0 to 35 mol % of ethylenically unsaturated monomers different from i), ii) or iii); and where polymer P is obtained by an emulsion polymerisation process in the presence of the block copolymer [A] x [B] y , and comprises: i) 0 to 15 wt % of ethylenically unsaturated monomer unit s bearing adhesion promoting functional groups; ii) 0 to 15 wt % of ethylenically unsaturated monomer unit s bearing water-dispersing functional groups; iii) 50 to 100 mol % of C 1-18 hydrocarbo (meth)acrylate monomers and/or styrenic monomers and/or styrenic monomers; and iv) 0 to 35 wt % of ethylenically unsaturated monomer unit s different from i), ii) or iii).
Abstract:
An aqueous coating composition (which optionally can coat plastic substrates) the composition comprising a block copolymer and a polymer P; where the block copolymer comprises at least blocks [A] x [B] y ; where at least block [A] is obtained by a controlled radical polymerisation of at least one ethylenically unsaturated monomer via a reversible addition-fragmentation chain transfer (RAFT) mechanism (optionally in solution in the presence of a control agent and a source of free radicals); and wherein block [A] comprises 20 to 100 mol% of ethylenically unsaturated monomer units bearing water-dispersing functional groups; wherein block [B] comprises 20 to 100 mol% of ethylenically unsaturated monomer units bearing plastic adhesion promoting functional groups; and wherein polymer P is prepared in the presence of blocks [A] x [B] y . The compositions may be used to coat plastic substrates, foam; surfaces having low surface energy, hydrophobic substrates and/or polyolefins.
Abstract translation:包含嵌段共聚物和聚合物P的组合物的水性涂料组合物(其可任选地可以涂覆塑料基材); 其中嵌段共聚物至少包含嵌段[A] x [B] y; 其中至少通过可逆加成断裂链转移(RAFT)机理(任选在溶液中存在控制剂和自由基来源)通过至少一种烯属不饱和单体的受控自由基聚合获得嵌段[A] ); 并且其中嵌段[A]包含20至100摩尔%的带有水分散官能团的烯属不饱和单体单元; 其中嵌段[B]包含20至100摩尔%的具有塑性粘合促进官能团的烯属不饱和单体单元; 并且其中聚合物P在嵌段[A] x [B] y的存在下制备。 组合物可用于涂覆塑料基材,泡沫; 具有低表面能的表面,疏水性基材和/或聚烯烃。
Abstract:
The present invention relates to a process for preparing an aqueous binder composition, as well as the aqueous binder composition comprising a carboxylic acid-functional vinyl polymer (polymer A) and vinyl polymer (polymer B).
Abstract:
There are described copolymers (and processes for making them) comprising (a) at least 8. 5 wt-% preferably >=20 wt-% of a higher itaconate diester (preferably dibutyl itaconate -DBI); (b) less than 23 wt-% acid monomer but also sufficient to have an acid value less than 150 mg KOH/g of polymer, (c) optionally with less than 50 wt-% of other itaconate monomers, and (d) optionally less than 77 wt-%of other monomers not (a) to (c). The DBI may be biorenewable. One embodiment is an aqueous dispersion of vinyl sequential polymer of two phases: A) 40 to 90 wt-% of a vinyl polymer A with Tg from -50 to 30°C; and B) 10 to 60 wt-% of a vinyl polymer B with Tg from 50 to 130°C; where DBI is used to prepare A and/or B and polymer A has from 0.1 to 10 wt-% of at least one acid-functional olefinically unsaturated monomer. Another embodiment is an aqueous polymer coating composition of a vinyl oligomer C of Mw from 1,000 to 150,000 g/mol and an acid value > 5 mgKOH/g; and a vinyl polymer D of Mw >= 80,000 g/mol and an acid value
Abstract:
There is described a method of preparing a post-modified polymer the method comprising the steps of: (1) polymerising a monomer composition comprising from 2.5 to 75% by weight of the total monomer composition of at least one itaconic anhydride, precursor thereof and/or derivative thereof in a polymerisation method to obtain an itaconate Polymer A; (2) reacting in a post modification step at least 10 mole-% of the anhydride groups, anhydride precursor groups and/or anhydride derived groups of the Polymer A obtained from step (1) with a Nucleophile B to form a post-modified Polymer C, and optionally using said polymer C as seed or stabiliser in a further step (3) to form a sequential Polymer D.
Abstract:
There is described a process for preparing an silane-functional oligomer (such as an alkoxysilane polyurethane) suitable for use as a crosslinkable coating component, the process comprising the steps of: 1) reacting an aminoalkyl silane with a cyclic carbonate, lactone or lactam to form a hydroxyl (OH) or imino (NH) functional silane intermediate, 2) reacting the silane intermediate from step 1) (optionally immediately without isolation) with a diisocyanate (diNCO) to form a silane functional polyurethane; where in step 2) the molar ratio of the total amount OH or NH groups on the silane intermediate of step 1) to the diisocyanate is from 1.8 to 2.2 (preferably about 2.0) and the resultant silane polymer is substantially-free of isocyanate groups thereon.
Abstract:
The invention relates to an aqueous emulsion comprising at least a vinyl polymer, said vinyl polymer comprising: a) 45 to 99 wt% of itaconate ester monomers having formula (I), wherein R and R' are independently an alkyl or an aryl group; b) 0.1 to 15 wt% of ionic or potentially ionic unsaturated monomers; c) 0 to 54 wt% of unsaturated monomers, different from a) and b); and 0.9 to 54.9 wt% by weight of total monomers of a chaser monomer composition added subsequently and polymerised after the polymerisation of monomers a), b) and c); wherein a) + b) + c) and the chaser monomer composition add up to 100 %; and wherein the aqueous emulsion contains less than 0.5 wt% free itaconate ester monomers of formula I based on the total weight of the aqueous emulsion.
Abstract:
An aqueous composition comprising: A) a crosslinkable vinyl graft copolymer comprising 30 to 85 wt% of a polymeric backbone; and 70 to 15 wt% of at least one macromonomer grafted to the polymeric backbone, where the Tg of the macromonomer is in the range of from 15 to 140 0C; where the Tg of the polymeric backbone is 75 % of the carbonyl functional vinyl monomers in the vinyl graft copolymer; and B) a hydrazide functional compound; where the ratio of hydrazide functional groups to carbonyl functional groups in the vinyl graft copolymer is in the range of from 0.1 to 1.5; and where the composition comprises