Abstract:
A rubber-modified styrene resin containing a rubbery polymer as dispersed particles, wherein the continuous phase has a weight-average molecular weight (MwL) of 180,000 to 280,000 and the weight-average molecular weight and the 1-cm drawdown time (sec) for a rubber-modified styrene resin sheet satisfy the relationship [1-cm drawdown time (sec)] > (MwL/10 ) - 4.0; an effective process for producing the resin; and a rubber-modified styrene resin sheet obtained by forming the resin. The rubber-modified styrene resin has so high thermoforming stability that a sufficiently long time for thermoforming can be ensured. It is suitable for use in forming into a sheet. The rubber-modified styrene resin sheet has excellent thermoforming stability.
Abstract:
Elastomeric polymers that have been functionalized are shown to provide superior extruded profiles for use in vehicle sealing systems. Generally the polymers functionalized are the ethylene, -alpha-olefin, non-conjugated diene monomer terpolymers or ethylene, -alpha-olefin copolymers. The elastomeric polymers are functionalized with one or more of carboxylic acids, anhydrides, hydroxyl, epoxide or amine functionality. The functionalized elastomeric polymers are generally used in conjunction with non-functionalized elastomeric polymers. The functionalized elastomeric polymers provide superior adhesion to the additional components used to enhance functionality and/or aesthetics. Among the vehicle sealing systems discussed are glass run channels, inner belt line seals, outer belt line seals and door seals.
Abstract:
A styrene resin composition excellent in gloss, rigidity, and surface impact strength. A solution obtained by mixing (b1) a homopolymer of a diene monomer or (b2) a styrene monomer/diene monomer copolymer having a styrene unit content of 15 wt.% or lower with (b3) a styrene monomer/diene monomer copolymer having a styrene unit content of 20 to 50 wt.%, (a1) a styrene monomer, and (a2) an alkyl (meth)acrylate is polymerized by continuous bulk polymerization in a continuous bulk polymerization line containing tubular reactors each having mixing elements fixed inside which each has no movable part.
Abstract:
Disclosed is a nonstyrenated polyester or vinyl ester resin that is found to be nonbrittle and to have good temperature performance, relative to known nonstyrenated polyesters or vinyl esters. Also disclosed is a nonstyrenated polyester or vinyl ester urethane acrylate resin. Methods for making nonstyrenated polyester or vinyl ester resins, including urethane acrylate resins, are provided.
Abstract:
A process for producing high impact polystyrene including feeding at least one vinyl aromatic monomer; an elastomer, and a free radical initiator to a first linear flow reactor to form a reaction mixture. Polymerizing the reaction mixture in the first linear flow reactor to a point below the point at which phase inversion occurs to produce a first polymerization mixture and feeding the first polymerization mixture from the first linear flow reactor to a second linear flow reactor. Polymerizing the reaction mixture in the second linear flow reactor to at least a phase inversion point of the mixture to produce a second polymerization mixture and feeding the second polymerization mixture from the second linear flow reactor to at least a third linear flow reactor for post.inversion polymerization of the second polymerization mixture.
Abstract:
Réseaux interpénétrés de polymères, comprenant un premier réseau de polymère A formé de monomères dont au moins un contient un groupe aromatique fonctionnalisé par un groupe échangeur de cation, et un second réseau de polymère B formé de monomères dont au moins un contient un groupement fluoré (R F ). Utilisation de ces réseaux interpénétrés de polymères pour fabriquer des membranes de pile à combustible.
Abstract:
An expandable polymer composition in the form of beads is manufactured by a seed polymerisation process, wherein an advantageous setting of the molecular weight and thus the glass transition temperature of the polymer composition is possible while allowing a reduced content of blowing agent within the expandable polymer composition.
Abstract:
The present invention provides a core shell polymer comprising (i) a core comprising a polymer having a Tg in the range of from -15 to 35 °C, which polymer is formed from a monomer mixture comprising at least one conjugated diene monomer and (ii) a shell comprising a polymer having a Tg in the range of from 40 to 180 °C, which polymer is formed from a monomer mixture comprising at least one aromatic vinyl monomer, wherein the gel content of the core polymer is below 62%.
Abstract:
The present invention provides a core shell polymer comprising (i) a core comprising a polymer having a Tg in the range of from -15 to 35 °C, which polymer is formed from a monomer mixture comprising at least one conjugated diene monomer and (ii) a shell comprising a polymer having a Tg in the range of from 40 to 180 °C, which polymer is formed from a monomer mixture comprising at least one aromatic vinyl monomer, wherein the gel content of the core polymer is below 62%.