Dsm IP Assets B.v.

Jeffrey Stubbs

Gerardus Cornelis Overbeek

Tijs Nabuurs

Matthew Stewart Gebhard

Johannes Hendrikus De Bont

The present invention relates to an aqueous polymer emulsion comprising at least 30 wt. % of a vinyl copolymer (A), said vinyl copolymer comprising: (I) from 10 to 90 wt. % of 2-octyl acrylate monomer; (II) from 10 to 90 wt. % of at least one itaconate ester monomer according to formula (1) in which A and B may be different or the same and A and B are independently an alkyl group or an aryl group; and (III) from 0 to 80 wt. % of ethylenically unsaturated monomer other than (I) and (II); whereby the summed amount of (I), (II) and (III) is 100 wt. % and whereby the amount of vinyl copolymer (A) is given relative to the total weight amount of the polymers present in the emulsion.

Aqueous polymer emulsion

There are described a dispersion of polymeric beads where the beads comprise a copolymer composition comprising (preferably consisting essentially of): copolymers (and processes for making them) comprising (a) at least 8.5 wt-% preferably &#x3e;=20 wt-% of a higher itaconate diester (preferably dibutyl itaconate&#x2014;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. A further embodiment is an aqueous suspension polymerization 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.

Polymeric beads, process and composition

There are described q oligomer-polymer composition [optionally substantially free of styrene (&#x3c;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 &#x3e;=20 wt-% of a higher itaconate diester (preferably dibutyl itaconate&#x2014;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 &#x2212;50 to 30&#xb0; C.; and B) 10 to 60 wt-% of a vinyl polymer B with Tg from 50 to 130&#xb0; 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&#x3e;5 mgKOH/g; and a vinyl polymer D of Mw&#x3e;=80,000 g/mol and an acid value&#x3c;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 polymerization 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.

Polymer, process and composition

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. 

Growing community of inventors

Echt, Netherlands

Jeffrey Stubbs