Rohm and Haas Company

Dow Global Technolgoies LLC

Michael T Petr

Paul Ralph Van Rheenen

Carlos Alfonso Cruz

Sam L Crabtree

Jay M Tudor

Jeffrey D Wenzel

Mark Mirgon

Steven Richard Rapacki

Jie Feng

A processing aid for foam molding comprising a copolymer obtained by the polymerization of from 50% to 100% by weight total of one or more monomers selected from the group consisting of ethyl methacrylate and propyl methacrylate, and 0 to 50% by weight of other copolymerizable monomers, the copolymer having the following properties: (a) a reduced viscosity measured according to ASTM D2857 at 1 mg/mL in chloroform at 25&#xb0; C. of greater than 8 dL/g and (b) a Tg equal to or less than 77&#xb0; C. is provided.

Processing aid for foam molding, a vinyl chloride resin-based foam molding composition comprising the same and a foam molded product

A processing aid for foam molding comprising a copolymer obtained by the polymerization of 30 to 90% by weight of methyl methacrylate, 10 to 70% by weight total of one or more monomers selected from the group consisting of butyl methacrylate (BMA), pentyl methacrylate (PMA) and hexyl methacrylate (HMA), and 0 to 20% by weight of other copolymerizable monomers, the copolymer having a reduced viscosity measured according to ASTM D2857 at 1 mg/mL in chloroform at 25&#xb0; C. of greater than 8 dL/g is provided.

An apparatus comprising: (a) a mandrel; (b) an internal guide spaced apart from the mandrel; (c) an external guide extending around all or a portion of the internal guide and being spaced apart from the mandrel; wherein a pipe extends between the internal guide and the external guide and then over the mandrel so that the mandrel changes one or more dimensions of the pipe.

Mandrel and support assembly

Provided are thermoplastic polymer composition comprising (a) a polyvinyl halide, and (b) an acrylic copolymer comprising 70 to 100 weight % of a first polymeric stage, based on the total weight of the acrylic copolymer, comprising polymerized units derived from at least 85 weight % of one or more C-Calkyl methacrylate monomers and C-Calkyl acrylate monomers, based on the total weight of monomers in the first polymeric stage, wherein the first polymeric stage has a calculated Tof 70&#xb0; C. or less, and wherein the acrylic copolymer has a molecular weight of greater than 1.5&#xd7;10g/mol.

Thermoplastic compositions containing acrylic copolymers as melt strength and clarity process aids

A method comprising contacting a polymer composition with a metal processing surface wherein the metal processing surface is at a temperature of equal to or greater than 90&#xb0; C., wherein the polymer composition comprises one or more base polymers selected from the group consisting of polyvinyl halides, poly(meth)acrylics, polycarbonates, olefin-based polymers, and polystryrenes and a lubricant package which comprises at least one release agent of the following formulas where R is an alkyl group having 6 or more carbon atoms, M is a metal or cation, and X may be absent or selected from the group consisting of aromatic groups and ester groups is provided.

Method to enhance release of polymers from hot metal surfaces

The present invention relates to non-oriented and oriented polyvinyl chloride pipe comprising: a) polyvinyl chloride; b) from 2 to 5 parts by weight of polymeric processing aid per 100 parts by weight of the polyvinyl chloride; and c) from 1.6 to 2.0 parts by weight percent of a paraffin wax per 100 parts by weight of the polyvinyl chloride. The polyvinyl chloride pipe of the present invention comprises a concentration of paraffin wax lubricant (&#x3e;1.5 parts per 100 parts polyvinyl chloride) heretofore unrecognized in the art, without the loss of key physical properties.

Polyvinyl chloride pipe

The present invention provides vinyl halide polymer thermoplastic polymer compositions comprising a multi-stage, or, preferably, two-stage acrylic copolymer polymeric additive having (A) a high Tg, high molecular weight first stage polymer that is free of, in copolymerized form, vinyl aromatic monomers, and having (B) a low Tg, low molecular weight second stage polymer of copolymerized vinyl aromatic containing monomers, wherein the multi-stage acrylic copolymer can be isolated by coagulation and drying and provides compositions having both melt strength and lubrication in thermoplastic processing.

Thermoplastic compositions containing multi-stage copolymers as melt strength process aids with lubrication properties

An impact modifier composition comprising one or more core/shell polymers which comprise a crosslinked core having from 98 to 99.9 wt % units derived from one or more acrylate monomers and from 0.1 to 2 wt % units derived from a crosslinker containing a vinylically unsaturated moiety with an acrylate free radical reactivity ratio from 0.8 to 1.2 and one or more non-acrylate vinylically unsaturated moiety(ies) with an acrylate free radical reactivity ratio(s) greater than 1, wherein the crosslinked core has a swell ratio in THF between 7 and 15 and a Tg equal to less than 10&#xb0; C.; and a shell having from 20 to 100 wt % units derived from one or more (meth)acrylate monomers and having a Tg of greater than 20&#xb0; C. is provided. Also provided is a polymer composition comprising the impact modifier composition and a base structural polymer.

Impact modifier and a polymer composition comprising the same

A process of emulsion polymerization comprising (a) adding a reactive mixture to a reaction vessel, said reactive mixture comprising water, one or more emulsifiers, one or more acrylate monomers, and a crosslinker having a free radical reactivity ratio of less than 1, (b) providing conditions in which said reactive mixture undergoes emulsion polymerization to form a crosslinked core having a glass transition temperature, Tg, of less than or equal to 10&#xb0; C., or in the alternative, wherein the crosslinker is in an amount sufficient such that the crosslinked core has a swell ratio between 8 and 15 in THF and forming a polymer having an original ratio of units derived from the crosslinker to units derived from the acrylate monomer(s); and (c) feeding additional crosslinker during polymerization in an amount sufficient to maintain the original ratio of crosslinker to acrylate monomer(s) is provided. Further disclosed is an impact modifier composition and a polymer composition comprising an impact modifier.

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Collegeville, PA, United States of America

Michael T Petr