摘要:
Process for making organic solvent-free aqueous crosslinkable polymer composition comprising: a) preparing an aqueous solution of an acid-functional olgiomer with Tg below 50.degree. C. and having crosslinker functional groups; b) conducting an aqueous emulsion polymerisation to make an aqueous emulsion of an olefinic hydrophobic polymer in the presence of the aqueous oligomer solution, the hydrophobic polymer having Tg at least 25.degree. C. higher than that of the oligomer and optionally crosslinker functional groups, and c) combining with a crosslinking agent reactable with the crosslinker groups of the oligomer and polymer, said composition having Koenig hardness of .gtoreq.40 sec and minimum film forming temperature (MFFT).ltoreq.55.degree. C. Also the aqueous composition so formed and its use in various applications. The aqueous composition has excellent properties and in particular an advantageous balance of MFFT and Koenig hardness.
摘要:
Process for the production of an aqueous polymer emulsion which process comprises: a) preparing a low molecular weight polymer containing acid-functional groups using a free-radical polymerisation process which employs a free-radical initiator and, for the purpose of controlling molecular weight, a transition metal chelate complex, wherein said low molecular weight polymer has a number average molecular weight within the range of from 500 to 50,000; b) conducting an aqueous emulsion polymerisation process to form an aqueous emulsion of a hydrophobic polymer from at least one olefinically unsaturated monomer, wherein the low molecular weight polymer of step a) is introduced to the aqueous medium of said emulsion polymerisation process before the start of and/or during said emulsion polymerisation process and becomes dissolved or dispersed in said aqueous medium.
摘要:
Coating composition comprising a liquid carrier-based dispersion of at least one olefinic addition polymer, said dispersion of polymer(s) providing polymer bound tertiary amino groups and polymer bound acetoacetyl groups.The compositions are suitable for providing protective or decorative coatings for a range of substrates and have excellent adhesion and wet adhesion properties.The olefinic addition polymers having polymer bound amino and acetoacetyl groups are also claimed.
摘要:
An aqueous polymer coating composition comprising at least: a vinyl polymer A having a wt average molecular wt Mw within the range of from 1,000 to 150,000 g/mol and an acid value >5 mgKOH/g; and a vinyl polymer B having a molecular wt Mw of at least 80,000 g/mol and an acid value
摘要:
An aqueous coating composition, which when in the form of a film exhibits an MVTR of ≦500 g/m2/24 h comprising 20 to 80 wt % of a polyurethane A with an acid value of 8 to 40 mg KOH/g and a hard segment content ≧40 wt %, a ring structure content ≧48 wt % and 80 to 20 wt % of a vinyl polymer B with a Tg≧20° C.
摘要:
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 polymerized after the polymerization 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.
摘要:
An aqueous polymer coating composition comprising at least: a vinyl polymer A having a wt average molecular wt Mw within the range of from 1,000 to 150,000 g/mol and an acid value >5 mgKOH/g; and a vinyl polymer B having a molecular wt Mw of at least 80,000 g/mol and an acid value
摘要:
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.
摘要翻译: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。
摘要:
An aqueous polyurethane composition comprising a polyurethane which is the reaction product of: (A) an isocyanate-terminated prepolymer and (B) at least one active-hydrogen chain-extending compound comprising at least 0.20 stoichiometric equivalents with respect to the isocyanate content of the isocyanate-terminated prepolymer (A), of an active-hydrogen chain-extending compound selected from the group consisting of hydrazine, hydrazine derivatives and mixtures thereof; and wherein at least 0.2 stoichiometric equivalents of the anionic or potentially anionic water-dispersing groups are neutralised with ammonia.
摘要:
There is disclosed a process for obtaining a water-borne crosslinkable composition comprising a block copolymer comprising at least blocks [A]x[B]y (where x is an integer from 3 to 80 (inc.), where y is an integer ≧10 and where y>x) and a polymer P, the block copolymer-polymer having an acid value ≦150 mg KOH per g of block copolymer-polymer, where at least block [A] and [B] 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 polymer P is obtained in the presence of blocks [A]x[B]y by an emulsion polymerisation process.
摘要翻译:公开了一种获得水性交联组合物的方法,该组合物包含至少包含嵌段[A] x [B] y(其中x为3-80(inc。)的整数)的嵌段共聚物,其中y为整数≧ 10,并且其中y> x)和聚合物P,具有酸值&nlE的嵌段共聚物 - 聚合物;每克嵌段共聚物 - 聚合物为150mg KOH,其中至少块[A]和[B]通过受控 在控制剂和自由基源的存在下,通过可逆加成 - 断裂链转移(RAFT)机理在溶液中自由基聚合至少一种烯属不饱和单体; 并且其中通过乳液聚合方法在嵌段[A] x [B] y存在下获得聚合物P。