POLYMER, PROCESS AND COMPOSITION

摘要

There are described q oligomer-polymer composition [optionally substantially free of styrene (<1.5 wt-% of copolymer)] comprising oligomer composition O having a weight average molecular weight of from 1000 to 150,000 g/mol (measured by GPC) and polymer composition P having a weight average molecular weight of at least 80,000 g/mol (measured by GPC) the oligomer composition O and the polymer composition P each independently comprising a copolymer composition 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 <10 mgKOH/g where D is obtained from DBI and the amount of monomers used to form C and D fall into the respective weight ratios 5 to 70 for polymer C and 95 to 30 for polymer D. A further embodiment is an aqueous suspension polymerisation process for preparing vinyl polymer beads from olefinically unsaturated monomers and a free-radical initiator, where at least 10 wt-% of the monomer is DBI.

主权项

1. A oligomer-polymer composition [optionally substantially free of styrene (<1.5 wt-% of copolymer)] comprising oligomer composition O having a weight average molecular weight of from 1000 to 150,000 g/mol (measured by GPC) and polymer composition P having a weight average molecular weight of at least 80,000 g/mol (measured by GPC) the oligomer composition O and the polymer composition P each independently comprising a copolymer composition comprising:
(a) optionally at least 23% by weight of at least one monomer represented by Formula 1 where both R1 and R2 independently represent an optionally substituted hydrocarbo moiety having from 4 to 10 carbon atoms. (b) optionally at least one hydrophilic monomer also in an amount sufficient that the resultant polymer has an acid value less than 150 mg KOH per g of polymer, (c) optionally of one or more monomers represented by Formula 2 where R3 and R4 independently represent H or an optionally substituted hydrocarbo moiety having from 1 to 20 carbon atomsX1 and X2 independently represents O or NR5 where R5 denotes H or an optionally substituted hydrocarbo moiety having from 1 to 20 carbon atoms with the proviso that when X1 and/or X2 are O then the respective R3 and/or R4 attached to the oxy group independently represent an optionally substituted hydrocarbo having from 1 to 3 carbon atoms (d) optionally less than 77% by weight of monomers other than components (a), (b) or (c). where the percentages or amounts of (a), (b) (c) (d) are by weight calculated as a proportion of the total weight of (a)+(b)+(c)+(d) and thus total 100%; where independently at least one of the components(a), (b) (c) and/or (d) and/or the copolymer obtained from them are biorenewable defined as comprising an amount of carbon-14 sufficient to produce a decay of at least about 1.5 dpm/gC (disintegrations per minute per gram carbon); and where at least one component (a) is present in either oligomer composition O or polymer composition P.