摘要:
This invention pertains to a composition and a process for preparing a closed cell alkenyl aromatic polymer foam having enlarged cell size, comprising one or more alkenyl aromatic polymers, one or more substantially random interpolymers, one or more blowing agents having zero ozone depletion potential and optionally one or more co-blowing agents, and optionally, one or more nucleating agents and optionally, one or more other additives.This combination allows the manufacture of closed cell, low density alkenyl aromatic polymer foams of enlarged cell size, when blowing agents of relatively high nucleation potential are employed. When such blowing agents are used with alkenyl aromatic polymers in the absence of the substantially random interpolymers, small cell foams result.
摘要:
The present disclosure is directed to acetylated polyglyceride fatty acid ester and compositions containing the same. The acetylated polyglyceride fatty acid ester may be blended with an epoxidized fatty acid ester. The present acetylated polyglyceride fatty acid ester and blends find advantageous application as a plasticizer.
摘要:
The present disclosure is directed to plasticizer compositions. A composition is provided which includes a castor-free acetylated glyceride of 12-hydroxystearic acid (AGHA) having a hydroxyl number from 0 to less than 15. The castor-free AGHA finds application in coatings for wire and cable.
摘要:
The present disclosure is directed to acetylated castor components and compositions including the same. The acetylated castor component may be an acetylated castor oil and/or an acetylated castor wax. The acetylated castor component may be blended with an epoxidized fatty acid ester. The present acetylated castor components and blends find advantageous application as a plasticizer.
摘要:
Compositions comprising a polymer resin comprising at least one copolymer with hydrolyzable groups, a water-generating metal salt hydrate, and a catalyst that comprises a metal atom and at least two ligands taken from the set alkyloxy and carboxylate are used to form articles that moisture-cure through in-situ generation of water via dehydration of the metal hydrate. The compositions are melt mixed to promote the dehydration and start the cure process during the mixing step. The curing compositions are formed and allowed to harden.
摘要:
Polymer compositions comprise a (i) silane-functionalized polymer, e.g., a polyethylene grafted with vinyl triethoxy silane, (H) polyfunctional alcohol e.g., α,α,α′,α′˜tetramethyl-I,3-benzenediethanol and, optionally, (iii) acid, e.g., an alkylated aryl disulfonic acid. The use of polyfunctional alcohols in the absence of a strong acid yields a light-crosslinking of the silane-functionalized polymer and this, in turn, provides a polymer melt with improved extensional properties such as elongational viscosity and melt strength. The use of a polyfunctional alcohol in combination with a blocked strong acid provides a slow rate of crosslinking during melt processing and a high degree of ultimate crosslinking after the polymer composition has been shaped or molded.
摘要:
PVC resin-based compositions that include biochemical plasticizers as the primary plasticizers are provided. The compositions include PVC resin, a compatibilizer, one or more biochemical plasticizers and, optionally, a thermoplastic elastomer impact modifier. The biochemical plasticizers are present in substantial quantities in the compositions and, in some embodiments, are the only plasticizers present in the compositions.
摘要:
The present disclosure provides propylene-based polymers which exhibit a strain hardening distribution factor that is less than zero and/or a strain hardening factor greater than 1.5. The propylene-based polymers are rheology-modified by way of silane coupling to improve melt strength.
摘要:
Polymer compositions comprise a (i) silane-functionalized polymer, e.g., a polyethylene grafted with vinyl triethoxy silane, (H) polyfunctional alcohol e.g., α,α,α′,α′˜tetramethyl-I,3-benzenediethanol and, optionally, (iii) acid, e.g., an alkylated aryl disulfonic acid. The use of polyfunctional alcohols in the absence of a strong acid yields a light-crosslinking of the silane-functionalized polymer and this, in turn, provides a polymer melt with improved extensional properties such as elongational viscosity and melt strength. The use of a polyfunctional alcohol in combination with a blocked strong acid provides a slow rate of crosslinking during melt processing and a high degree of ultimate crosslinking after the polymer composition has been shaped or molded.
摘要:
The insulation shield layer of a power cable comprises a blend of ethylene copolymer, e.g., vinyl acetate, and a styrenic polymer, e.g., polystyrene. The insulation shield layer is adjacent to a polyolefin insulation layer of the power cable. The insulation shield layer exhibits cross-linkability, strippability from the insulation layer, and good thermal stability.