Lucite International UK Limited

Lucite International Specialty Polymers & Resins Limited

Imperial Chemical Industries Limited

Lucite International Speciality Polymers and Resins Limited

Mitsubishi Chemical Corporation

Michael Stephen Chisholm

Andrew Trevithick Slark

Sera Saheb Abed-Ali

David Colin Sherrington

Nial O'Brien

David McDonald

Helen Harte

Ian Robinson

David Mcdonald

Robinson Ian

The invention relates to a hardenable multi-part acrylic composition. The composition has at least two parts which react with each other upon being mixed together to progressively harden to form a solid cement, such as a bone cement. The beads in the first part comprise an acrylic bead polymer core produced by suspension polymerisation and having a Tg of &#x3e;70&#xb0; C. and emulsion polymerised acrylic microparticles at least partially coating the surface of the acrylic bead polymer core. The microparticles may form a porous coalesced network. The bone cement composition comprises the first part and a liquid second part and optionally, further parts. The parts are operable to form a cement which hardens to a solid mass upon mixing of the parts together. The composition further comprises an acrylic monomer component in the second part and an initiator component. A method of production of coated beads for the hardenable multipart composition and a solid cement is also described.

Hardenable multi-part acrylic composition

A hardenable multi-part acrylic composition having at least two parts that react upon mixing to form a cement, such as bone cement, which hardens to a solid is described that includes storage stable liquid first and second parts, and optionally, further liquid parts. The parts react upon mixing to form a cement that hardens to a solid. The composition includes an acrylic monomer component and an initiator component in an amount effective to polymerize the acrylic monomer component when mixed and/or activated with it. The liquid first part comprises an aqueous dispersion of acrylic polymer particles and acrylic polymer beads. The polymer beads are at an equilibrium water content with the aqueous phase of the dispersion that generally has a viscosity between 10 and 10,000 centipoise. A twin barreled syringe, caulking gun or other cement mixing and delivery device and a method of producing the composition are also described.

An additive manufacturing composition for powder bed processes is described. The composition includes at least a first type of impact modified polymer beads. The polymer beads include a) an acrylic or vinyl (co)polymer matrix, and b) an impact modifier in which at least 85% w/w of the first type of impact modified polymer beads have a particle size of between &#x2265;20 &#x3bc;m and &#x2264;200 &#x3bc;m and/or on average the impact modified polymer beads have greater than 5% w/w impact modifier. Also disclosed is an additive manufacturing process for a production of a three dimensional product comprising fused impact modified polymer particles. The use of a composition in additive manufacturing, an additive manufacturing cartridge or replacement hopper and a process for the production of impact modified polymer beads by a suspension polymerization process is also disclosed.

Additive manufacturing composition

A multi-part acrylic cold curing composition for metallography moulds to produce a metallography mount is described. The composition has a storage stable solid part and a storage stable liquid part. The parts are operable to form a mixture which polymerises to a solid mass upon mixing of the parts together. The solid part comprises polymer powder and initiator and the liquid part comprises acrylic monomer and optionally activator or accelerator. The initiator is present in an amount effective to polymerize the acrylic monomer component upon being mixed with the liquid part. The composition comprises a cyclic ester side group containing monofunctional acrylic monomer. The composition liquid part may contain a mixture of monofunctional monomer(s) and polyfunctional monomer(s), wherein the polyfunctional monomers comprise between 12 and 22% w/w of the total monomers in the uncured composition. Metallography mounts and processes for producing the mounts are also described.

Multi-part acrylic cold-curing composition

A hardenable multi-part acrylic composition comprises a solid first part and a storage stable liquid second part and optionally, further solid and/or liquid parts, the parts being operable to form a cement which hardens to a solid mass upon mixing. The composition further comprises an acrylic monomer component in the second part, an initiator component, a first sub-population of acrylic polymer particles in the first and/or further parts, a second sub-population of acrylic polymer particles in the first and/or further parts and optionally, one or more further sub-population(s) of acrylic polymer particles, and a radiopacifying filler. The initiator component amount is effective to polymerize the acrylic monomer component upon mixing. At least some of the radiopacifying filler is encapsulated within and/or adsorbed on the first sub-population of acrylic polymer particles and the second sub-population of acrylic polymer particles has a lower average particle size than the first.

The invention relates to a hardenable multi-part liquid acrylic composition. The composition comprises a storage stable liquid first part, a storage stable liquid second part and optionally, a third or further liquid parts. The parts are operable to form a cement which hardens to a solid upon mixing of the parts together. The composition comprises an acrylic monomer component, an initiator component, acrylic polymer particles and a radiopacifying filler. The initiator component is present in an amount of effective to polymerize the acrylic monomer component upon being mixed and/or activated therewith. At least some of the radiopacifying filler is encapsulated within and/or adsorbed on the acrylic polymer particles in a liquid part. The invention extends to an at least twin barreled syringe or caulking gun accommodating the multi-part composition, a method of producing the multi-part composition, a composition for use as bone cement composition or in dental repairs, a liquid composition comprising a first sub-population of emulsion or non-emulsion polymerized acrylic polymer particles and radiopacifying filler encapsulated and/or adsorbed in the first sub-population of acrylic polymer particles and bone cement compositions or dental compositions.

A hardenable two part acrylic composition is described for the treatment of human or animal bone is described. The composition comprises a storage stable liquid first part and a storage stable liquid second part which react with each other upon mixing to form a cement which hardens. The composition further comprises an acrylic monomer component and an initiator component in an amount effective to polymerize the monomer component. The monomer component and the initiator component are generally located in separate parts of the two part composition so that the monomer component is storage stable. The liquid first part comprises emulsion polymerized acrylic polymer particles in a liquid carrier. A method of producing a hardenable two part acrylic composition is also described. The composition is particularly useful in a syringe or caulking gun having at least two barrels.

Hardenable two part acrylic composition

A hardenable two part acrylic composition, a polymer component of the two part hardenable composition and a method of producing a polymer component of the two part composition are disclosed. The hardenable two part acrylic composition includes an acrylic polymer composition first part and an acrylic monomer composition second part. The acrylic polymer composition first part includes a first type of acrylic polymer particles wherein each first type of acrylic polymer particle is formed of a network of coalesced emulsion polymerized acrylic microparticles or is macroporous. The acrylic polymer composition may include emulsion polymerised acrylic polymer particles of particle size between 10 and 2000 nm and includes the use of acrylic polymer particles formed of a network of coalesced emulsion polymerized acrylic microparticles as a dough time reduction agent in a hardenable two part acrylic composition.

An embedment casting composition and a process of embedding a specimen in an acrylic polymer matrix is described. The composition comprises an acrylic copolymer and a suitable solvent. The acrylic copolymer is derived from 80-99% w/w methyl methacrylate, 0.1-10% w/w of a C-Colefinically unsaturated acid co-monomer selected from carboxylic, phophonic, sulphonic or phosphinic acids and 0-10% w/w other suitable monomers and/or additives. A process of embedding a specimen in an acrylic polymer matrix, a cast of an embedded metal specimen, the use of an embedment composition for coating a specimen prior to an embedment coating process and use of an embedment composition as the copolymer resin component of an embedment slurry are also described.

Embedment casting composition

A method of preparing a (meth)acrylate functionalized polymer comprising the steps of mixing together a monofunctional vinylic monomer with from 0.3-100% w/w (based on monofunctional monomer) of a polyfunctional vinylic monomer and from 0.0001-50% w/w of a chain transfer agent, reacting said mixture to form a polymer and terminating the polymerization reaction before 99% conversion. The resulting polymers are useful as components of surface coatings and inks, as moulding resins or in curable compounds, e.g. curable moulding resins or photoresists.

Polymer composition

Branched polymers are prepared by mixing together monofunctional vinylic monomer with from 0.3 to 100% w/w of polyfunctional vinylic monomer and from 0.0001 to 50% w/w of chain transfer agent and thereafter reacting the mixture to form a polymer. The resulting branched polymers are soluble and may be used as component of surface coatings and inks as well as molding resins.

A method of preparing a (meth)acrylate functionalised polymer comprising the steps of mixing together a monofunctional vinylic monomer with from 0.3-100% w/w (based on monofunctional monomer) of a polyfunctional vinylic monomer and from 0.0001-50% w/w of a chain transfer agent, reacting said mixture to form a polymer and terminating the polymerisation reaction before 99% conversion. The resulting polymers are useful as components of surface coatings and inks, as moulding resins or in curable compounds, e.g. curable moulding resins or photoresists.

Functionalized polymer, a method for producing same and curable compositions containing same

The present invention describes a process for the making of a copolymer of the general formula (I)

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Yarm, United Kingdom

Michael Stephen Chisholm