Patents with Abstracts
Toughened poly(trimethylene terephthalate) composition with reduced melt viscosity
Talkowski, Hausmann and Walsh of DuPont, Delaware, developed mixture of a poly(trimethylene terephthalate) polymer, a nucleating agent, and an ethylene copolymer. Also disclosed in a method for reducing the melt viscosity of nucleated poly(trimethylene terephthalate) polymer composition. 0.005 to 1 wt% of a sodium salt of a carboxylic acid is the nucleating agent. Ethylene copolymers were used to reduce melt viscosity. (RDC 8/30/2012)
Compartmentalized chips with similar polymers of different viscosities for improved processability
Richardson et al of M&G USA Corporation, West Virginia, developed compartmentalized chips of at least two chemically similar crystallizable thermoplastic polymers each having a different intrinsic viscosity placed in separate zones are disclosed. These compartmentalized chips have thermal characteristics that are different from the traditional technique of homogeneously combining the two materials into the chip. These compartmentalized chips in their amorphous, crystalline and solid phase polymerized forms exhibit a longer crystallization half time than the homogeneous mixture, thus permitting faster injection cycle times when compared to an equivalent homogenous mixture. (RDC 8/10/2012)
Additives for halopolymers |
Abusleme, Avataneo and Perfetti of Solvay Solexis S.p.A., Italy, developed processing aids for halo-polymers between 0.01 and 10 wt% of 1) one or more (per)fluoropolyether polymers of formula: Q-O-[A-B]z-[A-B']z'-A-Q' (I) wherein: A=--(X)a--O-A'-(X')b-- wherein A' is a perfluoropolyether chain; X, X'=--CF2--, --CF2CF2--, --CF(CF3)--; a, b=0 or 1; B derives from one or more olefins, of which at least one homopolymerizable by radical way, of formula: --[(CR1R2--CR3R4j(CR5R6--CR7R8).sub.j']-- (Ia) wherein j=1-30, j'=0-29, with the proviso that 2<(j+j')<30; R.sub.1-R.sub.8=halogen, H, C1-C6 (per)haloalkyl, C1-C6 alkyl, or C1-C.sub.6 oxy(per)fluoroalkyl; B'=(Ia) but at least one of R.sub.1-R.sub.8 has a meaning different from that in B, and 2.ltoreq.(j+j')<30; z.gtoreq.2; z' is 0 or an integer; z, z' are such that the number average molecular weight of (I) is between 500 and 500,000; Q, Q'=C.sub.1-C.sub.3 perfluoroalkyl; C.sub.1-C.sub.6 alkyl; or functional end group(s). (RDC 7/27/2012)
Moldability modifier and polypropylene resin composition using the same
Zanka et al of Japan Polypropylene Corporation, Japan, developed a processing aid for polypropylene consisting of a propylene block copolymer (A) containing from 80 to 98 wt% of a propylene homopolymer portion (A1) and from 2 to 20 wt % of a propylene/ethylene random copolymer portion (A2), wherein the MFR of (A1) is 300 g/10 min or more, the ethylene content of (A2) is from 10 to 70 wt %, the [ζ.] of (A2) is 6.5 dl/g or more, and the MFR as a whole is 40 g/10 min or more; and propylene block copolymer (B) containing from 20 to 79 wt % of a propylene polymer portion (B1) and from 21 to 80 wt % of a propylene/ethylene random copolymer portion (B2), wherein the MFR of (B1) is 20 g/10 min or more, the ethylene content of (B2) is from 20 to 70 wt %, the [ζ.] of (B2) is from 2.5 to 9.0 dl/g, and the MFR as a whole is from 0.1 to 50 g/10 min; and a polypropylene resin composition using the same. (RDC 7/10/2012)
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Roger D. Corneliussen
Maro Polymer Links
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Copyright 2012 by Roger D. Corneliussen.
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** Date of latest addition; date of first entry is 7/11/2012.