PROCEDURE FOR THE PRODUCTION OF PU HARD AERATED PLASTICS WITH SMALL HEAT CONDUCTIVITY

PROCEDURE FOR THE PRODUCTION OF EXPAND-CASH STYRENE POLYMERS

Expanded polypropylene beads with low thermal conductivity

Expanded polypropylene (EPP) beads with a density of 10-200 g/l and a particle diameter of 1-10 mm, contain 0.1-10 wt.% homogeneously dispersed graphite particles. Independent claims are also included for production processes for EPP beads by: (a) impregnating graphite-containing polypropylene (PP) granules with 2-40 wt.% volatile blowing agent in aqueous suspension under pressure at 100-160 deg C, and then releasing the pressure; and (b) extruding PP together with graphite and 2-30 wt.% volatile organic blowing agent at 120-240 deg C and granulating the extruded product.

PROCEDURE FOR THE PRODUCTION ALUMINUM POWDER OF ABSTENTIONS OF EXPAND-CASH OF STYRENE POLYMERS

Athermane Partikel enthaltende expandierbare Styrolpolymerisate

Expandable polystyrene] containing a styrene-butadiene block copolymer

An expandable styrene polymer (I) contains: (A) a polymer matrix consisting of 70-95 wt.% polystyrene or a styrene copolymer containing up to 50% comonomers and 5-30 wt.% of a styrene-butadiene block copolymer; (B) 1-15 wt.% (with respect to (A)) of a volatile blowing agent; and optionally (C) conventional additives. The block copolymer structure: S-B/S(-S)n, in which S = polystyrene block; B/S = butadiene/styrene copolymer block with a statistical distribution of monomers; and n = 0 or 1, with S blocks comprising 5-40 vol. %. Also claimed are: (i) a process for the preparation of (I) by the addition of (B) during or after mixing of (A); and (ii) an elastomeric foam having density 5-150g/cm<3>, which is prepared from (I).

METHOD FOR PRODUCING COLORED EXPANDABLE STYRENE POLYMER BEAD

PROBLEM TO BE SOLVED: To provide a method for producing a homogeneously colored bead- shaped expandable styrene polymer (EPS beads) in a simple method. SOLUTION: Colored expandable styrene polymer beads are obtained by polymerizing styrene in an aqueous suspension in the presence of a coloring pigment or a dye, if needed, with ≤20 wt.% of a comonomer (an ethylenically unsaturated comonomer, especially an alkylstyrene, divinylbenzene, acrylonitrile or α-methylstyrene) and adding a foaming agent before, during or after the polymerization. COPYRIGHT: (C)2002,JPO ...

Verfahren zur Herstellung von expandierbaren Styrolpolymerisaten

The invention relates to a method for producing graphite particles containing expandable styrene polymers by means of polymerization of styrene in aqueous suspension in the presence of graphite particles and polymerization of two peroxides which disintegrate at varying temperatures. The peroxide which disintegrates at the lower temperature neither forms benzoyl nor benzyl radicals during disintegration.

Expandierbare Styrolpolymerisate

Athermane Partikel enthaltende expandierbare Styrolpolymerisate

Light plaster for thermal insulating wall cladding

The light plaster, also as a thermal insulation, is based on hydraulic bonding agents and additives of polystyrene foam particles containing 01.-10.0 wt% of soot and/or other graphite particles. The hydraulic bonding agents are plaster and wall binders or mixed bonding agents based on lime and cement. The foam particles have a bulk density of 5-20 g\*l<-1>, and a mean particle size of 0.5-3.0 mm. The soot and/or graphite particles are incorporated homogeneously in the cell walls of the foam particle structure, or they are applied to the surface.

Schaumstoff-Formteile für die Lebensmittelverpackung

Verfahren zur Herstellung von Polyurethan-Hartschaumstoffen mit geringer Wärmeleitfähigkeit

Verfahren zur Herstellung von expandierbaren Styrolpolymerisaten

Gefüllte schäumbare Polystyrol-Partikel

Verfahren zur Herstellung Aluminiumpulver enthaltender expandierbarer Styrolpolymerisate

PRODUCTION OF RIGID POLYURETHANE FOAM HAVING LOW THERMAL CONDUCTIVITY

PROBLEM TO BE SOLVED: To produce the subject foam having lowered thermal conductivity and good handleability, etc., and useful as an insulation material for composite element, etc., by adding graphite to an organic polyisocyanate, etc., and a compound having reactive hydrogen atom and reacting the mixture in the presence of a foaming agent, etc. SOLUTION: The objective foam useful for filling the hollow space of a refrigeration apparatus or a heating element is produced by reacting (A) an organic polyisocyanate and/or a modified organic polyisocyanate (e.g. diphenylmethane diisocyanate) with (B) one or more kinds of compounds having ≥2 reactive hydrogen atoms (e.g. polyether polyol) in the presence of (C) a foaming agent, (D) a catalyst and optionally (E) an assistant and/or an additive. In the above reaction, preferably 1-10 wt.% (based on the whole foam) of graphite is added to the component A and/or B. Preferably, ≥50% of the graphite has particle diameter of <20 μm. COPYRIGHT: (C)1999 ...

EXPANDABLE RUBBER-MODIFIED STYRENE POLYMER, ITS PRODUCTION, AND PRE-EXPANDED BEAD

PROBLEM TO BE SOLVED: To provide an expandable rubber-modified styrene polymer showing improved elasticity recovery, by incorporating a low-boiling blowing agent in a polymer mixture comprising a continuous phase of a styrene copolymer and rubber particles dispersed therein and comprising a butadiene/styrene block copolymer, and having a lamella structure free from polystyrene. SOLUTION: The expandable styrene polymer contains desirably 85-93 wt.% polystyrene or styrene copolymer (containing up to 50 wt.%, desirably up to 80 wt.% comonomer). The polystyrene contains a small amount (0.005-0.05 mol based on the styrene) of a crosslinking agent to be copolymerized. The expandable styrene polymer is desirably one containing 5-30 wt.% butadiene/styrene block copolymer in the polymer mixture and dispersed in the polystyrene phase in the form of particles. The ratio of the average length 1 of the rubber particles to the average thickness d is desirably above 5/1. The mixture contains 2-15 pts.wt ...

Expandable rubber-modified styrene polymer, its production, and pre-expanded bead

(57)【要約】 【課題】 良好な弾性回復を示す発泡性ゴム変性スチレ ン重合体を提供すること。 【解決手段】 ａ）ポリスチレン又は５０％までのコモ ノマーを含むスチレン共重合体からなる連続相と、ｂ） ５〜３０重量％の、連続相に分散したゴム粒子とを含む 重合体混合物、及び更に低沸点発泡剤を含む弾性ポリス チレンフォーム用発泡性ゴム変性スチレン重合体。発泡 性スチレン重合体は、ブロック共重合体の存在下スチレ ンを重合させ、発泡剤を含浸させることにより製造され る。

Verfahren zur herstellung von expandierbaren styrolpolymerisaten

Verfahren zur herstellung aluminiumpulver enthaltender expandierbarer styrolpolymerisate

Verfahren zur herstellung von polyurethan- hartschaumstoffen mit geringer wärmeleitfähigkeit