Abstract:
A process for producing expandable, thermoplastic polymer beads comprising cavities via extrusion of a polymer melt comprising blowing agent through a die plate and pelletization in a chamber comprising liquid under a pressure in the range from 1.5 to 15 bar, wherein the polymer melt comprising blowing agent comprises from 0.1 to 5% by weight of a nucleating agent D), from 1 to 10% by weight of a blowing agent E) which in essence remains within the polymer beads, from 0.01 to 5% by weight of a co-blowing agent F) forming the cavities, based in each case on the polymer melt comprising blowing agent, and also the expandable thermoplastic polymer bead material which can be obtained by the process, comprising cavities with an average diameter in the range from 0.1 to 50 µm.
Abstract:
The invention relates to an expandable styrene polymer containing 0.2 to 30.0 percent by weight of at least one homogeneously distributed triazine derivative, the percentage being relative to the expandable styrene polymer, a method for the production thereof using a coextrusion process, an expanded styrene polymer containing 0.2 to 30.0 percent by weight of at least one homogeneously distributed triazine derivative, the percentage being relative to the expanded styrene polymer, and a foam that can be made from said expandable styrene polymer.
Abstract:
The invention relates to phosphine sulfide derivatives of formula (I), S=PR 1 R 2 R 3 (I) which are suitable as flame retardants, in particular for polymers, wherein the symbols in formula (I) have the following meanings: R 1 , R 2 are identically or differently C1-C 12 -alkyl, C 3 -C 8 -cycloalkyl, which is unsubstituted or substituted by one or more C 1 -C4-alkyl groups, C 2 -C 12 -alkenyl, C 2 -C 12 -alkinyl, C 6 -C 10 -aryl, C 6 -C 10 -aryl-C 1 -C 4 -alkyl; R 3 is H, SH, SR 4 , OH, OR 5 or a group: -(Y 1 ) n -[P(= X 1 )R 6 -(Y 2 ) n ] m -P(= X 2 )R 7 R 8 ; or two groups R 1 , R 2 , R 3 together with the phosphorus atom to which they are bound form a ring system; X 1 , X 2 are identically or differently O or S; Y 1 , Y 2 are identically or differently O or S; R 4 , R 5 , R 6 , R 7 , R 8 are independently of each other identically or differently C1-C 12 -alkyl, C 3 -C 8 -cycloalkyl, which is unsubstituted or substituted by one or more C 1 -C 4 -alkyl groups, C 2 -C 12 -alkenyl, C 2 -C 12 -alkinyl, C 6 -C 10 -aryl or C 6 -C 10 -aryl C 1 -C 4 -alkyl; n is 1 if Y 1 or Y 2 is O, and 1, 2, 3, 4, 5, 6, 7 or 8 if Y 1 or Y 2 is S, and m is a whole number between 0 and 100.
Abstract:
The invention relates to a polymer foam having a density in the range between 5 and 120 kg/m 3 , containing a) a polymer component, containing at least one styrene polymer, b) 0.1 to 5 parts by weight (relative to 100 parts by weight of component a)) of a flame retardant mixture, containing b1) at least one phosphorus compound of formula (I) having a phosphorus content in the range between 5 and 80% by weight, relative to the phosphorus compound, (X 1 ) s =PR 1 R 2 R 3 (I), where the symbols and indices in formula (I) have the following meanings: R 1 is C 1 -C 16 -alkyl, C 1 -C 10 -hydroxyalkyl, C 2 -C 16 -alkenyl, C 1 -C 16 -alkoxy, C 2 -C 16 -alkenoxy, C 3 -C 10 -cycloalkyl, C 3 -C 10 -cycloalkoxy, C 6 -C 10 -aryl, C 6 -C 10 -aryloxy, C 6 -C 10 -aryl-C 1 -C 16 -alkyl, C 6 -C 10 -aryl-C 1 -C 16 -alkoxy, SR 9 , COR 10 , COOR 11 , CONR 12 R 13 ; R 2 is C 1 -C 16 -alkyl, C 1 -C 10 -hydroxyalkyl, C 2 -C 16 -alkenyl, C 1 -C 16 -alkoxy, C 2 -C 16 -alkenoxy, C 3 -C 10 -cycloalkyl, C 3 -C 10 -cycloalkoxy, C 6 -C 10 -aryl, C 6 -C 10 -aryl-C 1 -C 16 -alkyl, C 6 -C 10 -aryl-C 1 -C 16 -alkoxy, SR 9 , COR 10 , COOR 11 , CONR 12 R 13 ; R 3 is H, SH, SR 4 , OH, OR 5 or a group 30 -(Y 1 ) n -[P(= X 2 ) u R 6 -(Y 2 ) n ] m -P(= X 3 ) t R 7 R 8 ; or two groups R 1 , R 2 , R 3 together with the phosphorus atom to which they are bound form a ring system; X 1 , X2 and X 3 are independently of each other identically or differently O or S; Y 1 , Y 2 are identically or differently O or S; R 4 , R 5 , R 9 , R 10 , R 11 , R 12 ,R 13 are identically or differently C 1 -C 12 -alkyl, C 3 -C 8 -cycloalkyl, which is unsubstituted or substituted by one or more C 1 -C 4 -alkyl groups, C 2 -C 12 -alkenyl, C 2 -C 12 -alkinyl, C 6 -C 10 -aryl or C 6 -C 10 -aryl C 1 -C 4 -alkyl; R 6 , R 7 , R 8 are independently of each other identically or differently C 1 -C 16 -alkyl, C 1 -C 16 -alkenyl, C 1 -C 16 -alkoxy, C 1 -C 16 -alkenoxy, C 3 -C 10 -cycloalkyl, C 3 -C 10 -cycloalkoxy, C 6 -C 10 -aryl, C 6 -C 10 -aryloxy, C 6 -C 10 -aryl-C 1 -C 16 -alkyl, C 6 -C 10 -aryl-C 1 -C 16 -alkoxy, SR 9 , COR 10 , COOR 11 , CONR 12 R 13 ; n is 1, if Y 1 or Y 2 is O, and 1, 2, 3, 4, 5, 6, 7 or 8, if Y 1 or Y 2 is S; m is a whole number between 0 and 100; s, t and u are independently of each other 0 or 1; and b2) elementary sulphur.