Abstract:
Polymer blends comprising (A) at least one polystyrene (co)polymer other than styrene methyl methacrylate copolymer (SMMA), (B) at least one poly(lactic acid) (PLA) and (C) at least one styrene methyl methacrylate copolymer (SMMA) have advantageous properties.
Abstract:
The present invention relates to a polymer blend comprising 75-99.5% (w/w) of at least one polylactic acid) (PLA) and 0.5-25% (w/w) of at least one styrene butadiene copolymer containing at least 50% (w/w) styrene. The present invention further relates to the use of such polymer blend for producing products and to the resulting products. Moreover, an object of the present invention is the use of a styrene butadiene block copolymer having a dendrimer structure comprising 50-85% (w/w) styrene as an additive of polymer blends comprising at least 50% (w/w) of PLA and a method of producing the polymer blend according to the invention.
Abstract:
Polymer composition comprising (a) 33 to 52 wt.-% star-shaped block copolymers (a) comprising terminal vinylaromatic polymer blocks S1 and S2, and random styrene/butadiene copolymer blocks (B/S); and (b) 48 to 67 wt.-% SMMA copolymers (b). Moldings and shaped articles produced thereof have a high clarity and toughness and can be used in the household, appliance and healthcare sector.
Abstract:
Polymer blend comprising 95 to 100% of a component A) and 0 to 5% of additives, where A) is consisting of polymers A1 ) to A4): A1 ) 50 to 75% of a star shaped block copolymer A1 which comprises at least 2 terminal vinylaromatic hard blocks S and diene soft blocks B, where the proportion of the hard blocks S is from 65 to 90%, and Mn of block S is 35000 to 200000; A2) 5 to 15% of block copolymer A2 which comprises 2 terminal vinylaromatic hard blocks S1 and S2 and random copolymer blocks (B/S) consisting of 20 to 60% vinylaromatic monomers, and 80 to 40% dienes where the proportion of blocks S1 and S2 is 40 to 60%; and Mn of blocks S1 is 35000 to 200000, and Mn of blocks S2 is 5000 to 30000 and the molar S1/S2 ratio is 1:0.5 to 1:10; A3) 3 to 10% of an block copolymer A3 built up from vinylaromatic hard blocks S and from random soft blocks B/S consisting of 60 to 30% vinylaromatic monomers and 40 to 70% dienes, where the diene content is less than 50% and the proportion of the soft phase is at least 60%; and A4) 10 to 35% polystyrene A4; whereby the ratio of A1 ) to A2) to A3) is from 7 : [1.2 to 1.9] : [0.5 to 12], have particular mechanical properties.
Abstract:
High clarity and ductile molding composition comprising: (a) 71 to 98.99 wt.-% of at least one random copolymer (a) made from 44 to 64 wt.-% of at least one vinylaromatic monomer (a11), and 36 to 56 wt.-%, methyl methacrylate (a12); (b) 1 to 28.99 wt.-% of at least one vinylaromatic-diene block copolymer (b) which comprises at least one hard blocks S made from vinylaromatic monomers and at least one soft block B made from dienes, and/or at least one soft block B/S made from dienes and vinylaromatic monomers; where the proportion of diene-based on entire block copolymer (b) is 47 to 67 wt.-%; (c) 0.01 to 1.0 wt.-% of at least one light stabilizer (c); (d) 0 to 1.0 wt.-% of at least one antioxidant (d); and (e) 0 to 5 wt.-% of one or more additive(s) and/or processing aid(s) (e), different from the light stabilizer(s) (c) and antioxidant(s) (d); have good light stability and processability.
Abstract:
The invention relates to thermoplastic molding composition, comprising the components (a), (b) and (c) and optionally (d), comprising (a) 90 to 99.5% by weight of at least one copolymer (a), which comprises 30 to 90% by weight of vinylaromatic monomer (a1), and 10 to 70%by weight of methyl methacrylate (a2); (b) 0.1 to 1.5% by weight of at least two dye components (b1) and (b2) of different color families, soluble in the thermoplastic molding composition; (c) 0.01 to 5% by weight of carbon black pigment (c) and (d) optionally up to 5% by weight of one or more further additives (d), where the thermoplastic composition has a deep-black color with L*-values from 0.5 to 2.0 as measured with 45°/0° geometry, a high gloss of more than 93.0 and wherein the total weight of components (a) to (d) give a total of 100 percent by weight.
Abstract:
The invention is directed to a method for producing a thermoplastic molding composition comprising at least one styrene polymer and at least one lubricant, selected from fatty acids and fatty acids derivatives, wherein the method encompasses the preparation of a master batch polymer composition, comprising at least one styrene polymer having a melt flow rate (measured according to ASTMD1238, 200° C./5 kg) in the range of 2 to 10 g/10 min; and 10 to 40% by weight, based on the master batch polymer composition, of the lubricant. In particular the styrene polymer is selected from standard polystyrenes (general purpose polystyrene (GPPS)) and high impact polystyrenes(HIPS).
Abstract:
Polymer blends comprising components A), B) and C): A) 80 to 96% by weight of an impact modified styrenic polymer A), B) 1 to 7% by weight of a polymer blend B) comprising B1) 25 to 75% by weight of polyisobutylene and B2) 25 to 75% by weight of a polyolefin, C) 3 to 13% by weight of an elastomeric block copolymer C) of structure (A-(B/A))n-A, where A is a vinylaromatic block, (B/A) is a random copolymer block of vinylaromatic monomer and diene, and n is 1 to 10, exhibit improved environmental stress crack resistance properties in presence of hydrofluoro olefins.
Abstract:
The present invention relates to a thermoplastic impact resistant copolymer composition having an increased luminous transmittance in relation to conventional impact resistant compositions, a process for its preparation and shaped articles made therefrom. The composition comprises 25 to 45% by weight of at least one acrylate-based graft copolymer and 25 to 75% by weight of at least one random copolymer of alkyl (meth) acrylate and vinylaromatic monomers.
Abstract:
Thermoplastic molding compositions comprising (a) 97 to 99.85 wt.-% S/MMA-copolymer (MMA: 30 to 60 wt.-%) (a); (b) 0.1 to 1.5 wt.-% HALS combination (b) consisting of: (Ill) HMW-HALS (Mn)>1800 g/mol, and (b2) LMW-HALS (Mn)≤800 g/mol; (c) 0.05 to 1.0 wt.-% organic UV absorber (c); (d) optionally up to 0.5 wt.-% additive; wherein the ratio (b1):(b2) is 12:1 to 1:2; and the ratio (b):(c) is 5:1 to 1:5 are used for outdoor applications in the construction and automotive sector.