A macromolecule comprises a ring-opened polymerized product of β-lactone monomers of formula I:

##STR00001## and having a structure of formula IA:

##STR00002## wherein R.sub.1 is an alkyl group having at least 8 carbon atoms. The macromolecule may be hydroxy-terminated, and may be copolymerized with other β-lactone monomers having different substituting groups and/or with higher lactone monomers. The macromolecule may be used as a reactant to form an alkoxysilane-terminated polymer, a polyurethane, or a (co)polyester, or may be used as an elastomeric midblock in a triblock copolymer having hard end blocks, such as polylactic acid. Such triblock systems demonstrate two discreet regions having properties similar to styrene block copolymers and are therefore suitable for use as hot melt or pressure-sensitive adhesives. In some embodiments, such triblock polymers may be entirely bio-sourced and compostable.

A polymeric polymerization initiator represented by the following formula (I). M.sup.1.sub.aM.sup.2.sub.bD.sup.1.sub.cD.sup.2.sub.dT.sup.1.sub.eT.sup.2.sub.fQ.sub.g (I) M.sup.1=R.sup.1.sub.3SiO.sub.1/2 M.sup.2=R.sup.1.sub.2R.sup.2SiO.sub.1/2 D.sup.1=R.sup.1.sub.2SiO.sub.2/2 D.sup.2=R.sup.1R.sup.2SiO.sub.2/2 T.sup.1=R.sup.1SiO.sub.3/2 T.sup.2=R.sup.2SiO.sub.3/2 Q=SiO.sub.4/2 [R.sup.1 represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group. R.sup.2 represents a group having a ketene silyl acetal structure represented by the following formula (II). (A represents a single bond or a divalent organic group, R.sup.3 represents a hydrogen atom or a substituted or unsubstituted alkyl group, and R.sup.4 represents a substituted or unsubstituted alkyl group.) “a”, “b”, “c”, “d”, “e”, “f”, and “g” represent 0 or a positive integer where b+d+f≥1. An order of bonding of siloxane units is optionally determined.] ##STR00001##

The present invention relates to a primer coating composition that includes, (a) a (meth)acrylic polymer that includes hydroxyl groups, and which has a Tg of at least 30° C. The primer coating composition further includes, (b) a polyester that includes hydroxyl groups, and which has a weight average molecular weight of less than 3000, and a hydroxyl value of at least 100. The primer coating composition also includes, (c) a crosslinking agent having at least two isocyanate groups. The present invention also relates to a coated article that includes a repaired area that includes a primer coating formed from the primer coating composition of the present invention. The primer coating compositions, in accordance with some embodiments, provide reduced or minimal ringing defects.

An aqueous dispersion comprising at least one fatty acid-modified epoxy amine adduct wherein the fatty acid has an iodine number of lower than 30 and at least one polymer obtained from the polymerization of one or more ethylenically unsaturated monomers and their use for forming coatings or binder agents, especially for decorative and protective coating applications on various substrates.

A polymeric polymerization initiator represented by the following formula (I). M.sup.1.sub.aM.sup.2.sub.bD.sup.1.sub.cD.sup.2.sub.dT.sup.1.sub.eT.sup.2.sub.fQ.sub.g (I) M.sup.1=R.sup.1.sub.3SiO.sub.1/2 M.sup.2=R.sup.1.sub.2R.sup.2SiO.sub.1/2 D.sup.1=R.sup.1.sub.2SiO.sub.2/2 D.sup.2=R.sup.1R.sup.2SiO.sub.2/2 T.sup.1=R.sup.1SiO.sub.3/2 T.sup.2=R.sup.2SiO.sub.3/2 Q=SiO.sub.4/2 [R.sup.1 represents a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group. R.sup.2 represents a group having a ketene silyl acetal structure represented by the following formula (II). (A represents a single bond or a divalent organic group, R.sup.3 represents a hydrogen atom or a substituted or unsubstituted alkyl group, and R.sup.4 represents a substituted or unsubstituted alkyl group.) “a”, “b”, “c”, “d”, “e”, “f”, and “g” represent 0 or a positive integer where b+d+f≥1. An order of bonding of siloxane units is optionally determined.]

##STR00001##

A resin composition includes a vinyl-containing polyphenylene ether resin and a multifunctional vinylsilane. The resin composition may be used to make various articles, such as a prepreg, a resin film, a laminate or a printed circuit board and achieve improvement in at least one of the properties including prepreg or laminate surface appearance, glass transition temperature, ratio of thermal expansion, peel strength, thermal resistance after moisture absorption, thermal resistance, dielectric constant, dissipation factor and inner resin flow.

The present invention relates to a primer coating composition that includes, (a) a (meth)acrylic polymer that includes hydroxyl groups, and which has a Tg of at least 30 C. The primer coating composition further includes, (b) a polyester that includes hydroxyl groups, and which has a weight average molecular weight of less than 3000, and a hydroxyl value of at least 100. The primer coating composition also includes, (c) a crosslinking agent having at least two isocyanate groups. The present invention also relates to a coated article that includes a repaired area that includes a primer coating formed from the primer coating composition of the present invention. The primer coating compositions, in accordance with some embodiments, provide reduced or minimal ringing defects.

The present invention relates to a primer coating composition that includes, (a) a (meth)acrylic polymer that includes hydroxyl groups, and which has a Tg of at least 30 C. The primer coating composition further includes, (b) a polyester that includes hydroxyl groups, and which has a weight average molecular weight of less than 3000, and a hydroxyl value of at least 100. The primer coating composition also includes, (c) a crosslinking agent having at least two isocyanate groups. The present invention also relates to a coated article that includes a repaired area that includes a primer coating formed from the primer coating composition of the present invention. The primer coating compositions, in accordance with some embodiments, provide reduced or minimal ringing defects.

An aqueous dispersion comprising at least one fatty acid-modified epoxy amine adduct wherein the fatty acid has an iodine number of lower than 30 and at least one polymer obtained from the polymerization of one or more ethylenically unsaturated monomers and their use for forming coatings or binder agents, especially for decorative and protective coating applications on various substrates.

The invention provides composite particles comprising core particles having organosilica particles disposed about the core particles. The invention also provides a process for making the composite particles.