Abstract: Copolymeric macromonomers containing alkyl acrylate and methacrylate units and units of polysiloxanylalkyl esters of acrylic and/or methacrylic acids and a terminal carbon-carbon double bond organo group are useful for copolymerizing with other acrylate or methacrylate esters to make improved polymer compositions such as for contact lenses.

Abstract: Hybrid star polymers with acrylic arms and crosslinked polysiloxane cores can be made by a polycondensation of substituent alkoxysilyl groups contained in acrylic ester groups of acrylic block copolymers to form the cores.

Abstract: Hybrid star polymers with acrylic arms and crosslinked polysiloxane cores can be made by a polycondensation of substituent alkoxysilyl groups contained in acrylic ester groups of acrylic block copolymers to form the cores.

Abstract: Hybrid star polymers with functional acrylic arms and crosslinked polysiloxane cores are made by a group transfer polymerization process followed by a polycondensation of substituent alkoxysilyl groups to form the cores.

Abstract: Acrylic star polymers containing polysiloxanylalkyl ester groups in their arms and terminal organo groups containing a polymerizable carbon-carbon double bond are useful for improving polymer compositions for contact lenses.

Abstract: AB and ABA block copolymers of acrylics and acrylic amines are useful as oil additives to diminish sediment and color formation. The copolymers are preferably formed by group transfer polymerization.

Abstract: Acrylic hot melt pressure sensitive adhesive compositions having a good balance of tack, peel and creep resistance at ambient temperature combined with optical clarity and desirable melt viscosity at elevated temperatures are prepared by copolymerizing acrylic and methacrylic alkyl esters of a non-tertiary alcohol or optionally acids with polymerizable poly methacrylate based macromonomers. The resulting acrylic copolymer has a graft or comb structure in which the acrylic backbone has a low Tg and the pendant macromonomer side chains have a Tg above room temperature.Compounding these acrylic copolymers with tackifiers and plasticizers dramatically improves the balance of pressure sensitive adhesive properties while lowering melt viscosity into a desirable range. The invention provides significant property enhancements even for acrylic copolymers having poor initial peel and shear adhesive properties.

Abstract: A blend of a softer continuous phase polymer reinforced with harder acrylic star polymer particles having reactive functional groups with crosslinking ability built in or provided by a third polymer. The harder polymer has a T.sub.g at least 10.degree. C. above that of the softer polymer, and the acrylic star polymer is preferably made by group transfer polymerization. This blend provides coating compositions, films and bulk polymer with enhanced toughness and flexibility.

Abstract: Oil soluble copolymers comprised of an addition-type polymeric main chain and a plurality of addition-type polymeric side branches which contain basic amine groups are disclosed which stabilize distillate fuel and lubricating oil compositions against deterioration during storage.

Abstract: AB dispersants made by group transfer polymerization aid in controlling color shift during casting of MMA polymer sheet containing color pigments and additives, particularly chain transfer agent and sheet release agent.

Abstract: ABA triblock polymers that have glycidyl methacrylate as the A segments and (meth)acrylate monomers as the B segment are made by group transfer polymerization, using a monofunctional initiator to make the A, then AB segments. A coupling agent is used to connect the AB segments at the B group.

Abstract: Hybrid star polymers with functional acrylic arms made by group transfer polymerization and crosslinked cores made by condensation reactions with the functional groups on the arms.

Abstract: Hybrid star polymers with functional acrylic arms and crosslinked cores.