摘要:
Block copolymers of recurring structural units of the series of polysiloxanes and recurring structural units of the series of aliphatic polyesters, polyethers or polyetheresters with rubber properties, the polymeric block-forming polymers in each case producing rubber-type products with glass transition temperatures below practical temperatures of use and a process for the production thereof.
摘要:
Thermoplastic block copolymers of the idealized formulae (I)A--B--A; B--A--B or (A--B).sub.x (I)in whichx=1 to 40,and whereinA is the radical of a homopolymer of styrene, vinylnaphthalene, butadiene and isoprene, andB the radical of a homopolymer of a cyclic polycarbonate or lactone,the average molecular weight of blocks A and B being greater than 800, and a process for the preparation of these blocks copolymers in several reaction stages.
摘要:
Process for the polymerization of cyclic aliphatic carbonates in the presence of aprotic organic solvents with exclusion of atmospheric oxygen and atmospheric moisture, wherein organometallic compounds of elements of main group 1 of the periodic table are used as initiators, the monomer/solvent ratio is in the range from 1 part by weight to 50 parts by weight of monomer per 100 parts by weight of solvent and the polymerization temperature is between -100.degree. C. and +20.degree. C.
摘要:
Multi-block copolymers of recurring structural units of polysiloxanes and recurring structural units of aliphatic polyesters, polyethers or polyetheresters with rubber properties, the individual polymeric blocks constituting rubber-type products with glass transition temperatures below practical usefulness and a process for their production.
摘要:
The invention relates to new block copolymers consisting of recurring polysiloxane blocks and recurring conjugated diene homo-or copolymer blocks with particularly good rubber properties, in particular at low temperatures.
摘要:
Graft polymers of vinyl monomers or vinyl monomer mixtures on block copolymers of recurring structural units from the polysiloxane series and recurring structural units from the series comprising homo- and copolymers of conjugated dienes as grafting bases.
摘要:
Block copolymers composed of recurrent structural units belonging to the series comprising polysiloxanes and recurring structural units belonging to the series comprising homopolymers, copolymers or terpolymers of vinyl-aromatic compounds and acrylic monomers of mixtures thereof.
摘要:
Thermoplastic molding compositions of a vinyl chloride polymer and one or more emulsion polymers made with special emulsifiers have improved properties for technical application, such as reduced fogging. They are used for the production of molded articles, sheet products and films.
摘要:
Dispersions of stabilizers for plastics in water which contain special reaction products of diols and carboxylic acid anhydrides as auxiliary emulsifiers, and which are characterized by simple preparation, stability and good effectiveness in chemical materials.
摘要:
Polymer mixtures having high tensile strength and good tear propagation resistance, consisting of(A) from 10 to 95 parts by weight of a graft polymer,(B) from 0 to 75 parts by weight of a thermoplastic resin component and(C) from 5 to 60 parts by weight of a copolymer having a sequence type of structure corresponding to the idealized formula (I)(A--X--B).sub.n (I) whereinA=polymer of a cyclic carbonate,B=polymer of another cyclic ester andX=middle member containing partial structures of both A and B.