Abstract:
The invention concerns impact-resistant thermoplastic shaping compounds containing: A) 10 to 99.5 wt % of a thermoplastic polymer from the group comprising polyoxymethylenes, polyolefins, polyesters, polycarbonates, polystyrene, ABS, ASA, SAN, polyamides or poly(meth)acrylates or their mixtures; B) 0.5 to 80 wt % of a thermoplastic polyurethane; C) 0 to 50 wt % of a fibrous or particulate filler; and D) 0 to 30 wt % of conventional additives and processing agents; the thermoplastic polyurethane B) containing 0.05 to 10 wt %, relative to B), of a carbodiimide of formula (I), in which R, which is the same or different, is selected from the group comprising -NCO-, -NHCONHR -, -NHCONR R - and -NHCOOR residues, wherein R and R are the same or different and represent an alkyl, cycloalkyl or aralkyl residue; and R is identical to R or is an alkoxypolyoxyalkylene residue; and n is an integer from 0 to 10.
Abstract:
Thermoplastic molding materials with high impact resistance contain (A) 10 to 99 % by weight of a thermoplastic polymer from the group comprising the polyoxymethylenes, polyolefins, polyesters, polycarbonates, polystyrene, ABS, SAN, ASA or poly(meth)acrylates or mixtures thereof; (B) 0.5 to 80 % by weight of a thermoplastic polyurethane; (C) 0 to 50 % by weight of a fibrous or particulate filler; (D) 0 to 30 % by weight of usual additives and auxiliary products. The thermoplastic polyurethane (B) contains 0.5 to 50 % by weight, in relation to (B), of a plasticizer based on cresyl phosphates or esters of o-phthalic acid having the general formula (I), in which R , R stand for identical or different straight- or branched-chain alkyl residues with 1 to 15 C atoms, which C atoms may also be interrupted by 1 to 3 isolated oxygen atoms, or a cycloaliphatic or aromatic residue with up to 10 C atoms.
Abstract:
The invention relates to a process for the preparation of polyurethane elastomers by reacting …… a) organic and/or modified organic polyisocyanates with … b) at least one relatively high-molecular-weight polyoxybutylene- polyoxyalkylene glycol from the group consisting of polyoxybutylene- polyoxyethylene glycol, polyoxybutylene-polyoxypropylene glycol and/or polyoxybutylene- polyoxypropylene-polyoxyethylene glycol, … c) at least one chain extender and/or crosslinking agent and … d) at least one glycidyl compound containing units of the structure … … in which …… n is a number from 1 to 6, … X is an alkylene, arylene, -O- or -N- bridging member, and … R and R are identical or different radicals from the group consisting of hydrogen, methyl and ethyl, … in the presence or absence of … e) blowing agents, … f) catalysts, and … g) assistants and/or additives, … and mixtures of polyoxybutylene-polyoxyalkylene glycols (b) and glycidyl compounds (d).
Abstract:
A process for the preparation of a polyurethane elastomer by reacting a) an organic and/or modified organic polyisocyanate with b) at least one relatively high-molecular-weight poly-oxybutylene-polyoxyalkylene glycol from the group comprising polyoxybutylene-polyoxyethylene glycols, polyoxybutylene-polyoxypropylene glycols and/or polyoxybutylene-polyoxypropylene-polyoxyethylene glycols, c) at least one chain extender and/or crosslinking agent and d) at least one glycidyl compound containing units having the structure in which n is a number from 1 to 6, X is an alkylene, arylene, -O- or -N- bridge, and R1 and R2 are identical or different and are hydrogen, methyl or ethyl, in the presence or absence of e) blowing agents, f) catalysts and g) assistants and/or additives, and mixtures of polyoxybutylene-polyoxyalkylene glycols (b) and glycidyl compounds (d).
Abstract:
Oligomeric carbodiimides having an average degree of condensation of from 2 to 30, obtainable by oligocondensation of a) from 40 to 100 mol % of 2,4'-diisocyanatodiphenyl- methane or of a 3,3',5,5'-tetra-C1-C4-alkyl-4,4'-diisocyanatodiphenylmethane and b) from 0 to 60 mol % of a further bi- or polyfunction al aromatic isocyanate and c) if desired, complete or partial reaction of the remaining free isocyanate groups of the oligomers with an aliphatic, araliphatic or cycloaliphatic alcohol or amine, are used mainly for stabilizing polyester-containing polyurethanes against hydrolytic degradation.