| Patent Number |
Title Of Patent |
Date Issued |
| 5849414 |
Production of scratch-resistant polycarbonate moulded parts |
December 15, 1998 |
| Method for coating the surface of polycarbonate moulded parts, with a polycarbonate based on a diphenol of formula (Ia) ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, X and m are defined herein, and a material (b), which has been obtained by hydrolytic polycondensation of an aluminu |
| 5668232 |
Process for the production of polyisoolefins |
September 16, 1997 |
| Polyisoolefins are obtained using the process according to the invention by polymerising isoolefins, optionally with conjugated or unconjugated dienes and/or cationically polymerisable, mono- or polyunsaturated compounds at temperatures of -100.degree. C. to +100.degree. C. and pressures |
| 5668204 |
Stabilization of polycarbonates having high heat distortion temperatures |
September 16, 1997 |
| A thermoplastic molding composition containing an aromatic polycarbonate and a particular siloxane compound is disclosed. The composition which is based on a polycarbonate resin having bifunctional structural units corresponding to formula (Ia) ##STR1## wherein R.sup.1 and R.sup. |
| 5512632 |
Thermoplastic blends containing polyesters and polyester carbonates based on substituted cycloal |
April 30, 1996 |
| The invention relates to mixtures of special polyesters and/or special polyester carbonates with amorphous thermoplastics and/or with partly crystalline thermoplastics and/or with rubbers and/or with graft polymers useful for molding articles. |
| 5416161 |
Production of blend systems by the condensation of oligocarbonates in the presence of mass-polym |
May 16, 1995 |
| The present invention relates to a process for producing polymer blends from polycarbonate and mass-polymerized ABS by the condensation of oligocarbonate in the presence of mass-polymerized ABS. |
| 5416143 |
Highly flame-retardant polyamide moulding compounds |
May 16, 1995 |
| The invention relates to readily processible polyamide molding compounds which have very good mechanical and electrical properties as well as high surface quality and are based on polyamide, magnesium hydroxide and polyhydroxy compounds of the Novolak type. |
| 5389712 |
Difficultly flammable polyamide moulding materials |
February 14, 1995 |
| The present invention relates to easily processable polyamide moulding materials with very good mechanical and electrical properties based on calcium magnesium carbonate hydrate as the flame-retardant additive. |
| 5373082 |
Process for the production of thermoplastic polycarbonates |
December 13, 1994 |
| A process for the production of polycarbonates by melt transesterification is disclosed. Accordingly, polycarbonate waste is dissolved in monophenols and at an elevated temperature and in the presence of a catalyst degraded to yield oligocarbonates, diaryl carbonates and diphenols. Follo |
| 5340905 |
Process for the preparation of thermoplastic polycarbonates |
August 23, 1994 |
| A two step solvent-free process for the preparation of polycarbonates having a low degree of branching is disclosed. Accordingly, the process comprise(i) transesterifying in the melt, at temperatures of from 80.degree. to 250.degree. C. and under atmospheric pressure and for a time of up |
| 5334692 |
Highly branched polyphosphonates based on melamine |
August 2, 1994 |
| New, highly branched polyphosphonates which have a greatly improved flame retardant action compared with known polyphosphonates which are suitable as additives for plastics. In addition the new polyphosphonates may be incorporated in plastics as stabilizers with excellent migration p |
| 5326800 |
Use of salts in combination with halogenated phthalimides for flameproof finishing of glass fibr |
July 5, 1994 |
| The invention relates to use of salts of sulphonic acids, phosphonic acids and/or carboxylic acids in combination with halogenated phthalimides for additional processing of glass fibre-containing polycarbonate moulded members. |
| 5317083 |
Process for isolating polycarbonates from their solutions with tube having cross sectional contr |
May 31, 1994 |
| The present invention relates to a process for isolating polycarbonates in which a solution of polycarbonate in an organic solvent is dispersed with steam and which is characterized in that the resulting suspension of polycarbonate particles, condensed water and water/solvent vapor is |
| 5314985 |
Molten, catalytic process for the preparation of polycarbonates |
May 24, 1994 |
| The object of the present invention is to provide a process for the preparation of aromatic polycarbonates in the molten state using fluoride catalysts. |
| 5310793 |
Mixtures of polyalkylene terephthalates, new polycarbonates and/or polyester-carbonates and elas |
May 10, 1994 |
| The mixtures according to the present invention of polyalkylene terephthalates, certain new polycarbonates and/or polyester-carbonates and elastomers have a particularly favourable low temperature strength/heat distortion point relationship compared with conventional moulding composi |
| 5300550 |
Thermoplastic molding compositions |
April 5, 1994 |
| A thermoplastic molding composition is disclosed comprising(i) a thermoplastic resin(ii) a low molecular weight additive, and(iii) a specially prepared carrier material magnesium-aluminum-silicate.The carrier material which is characterized by its particle size and low bulk density was found to |
| 5288848 |
Process for preparation of high molecular weight, optionally branched polyarylene sulphides |
February 22, 1994 |
| The invention relates to a process for the preparation of optionally branched, high molecular weight polyarylene sulphides with melt viscosities which can be established at defined values and low corrosion.These polyarylene sulphides are obtained by reacting alkali metal sulphides, if ap |
| 5269887 |
Process for the purification of bisphenols |
December 14, 1993 |
| A process for the purification of bisphenols by distillation. |
| 5248763 |
Isolation of poly(ester)carbonates from methylene chloride using carbon dioxide fluid |
September 28, 1993 |
| A process for isolating a poly(ester)carbonate resin from its methylene chloride solution is disclosed. The process entails combining a solution which contains 5 to 30% by weight resin with carbon dioxide fluid in a two-component nozzle under pressures of 90 to 180 bar and at temperature |
| 5233037 |
Production of caprolactam by thermal depolymerization of polyamide 6 |
August 3, 1993 |
| The invention relates to a process for the production of caprolactam by thermal depolymerization of polyamide in the presence of small quantities of potassium carbonate at 250.degree. to 320.degree. C. and to a process for purifying the resulting caprolactam. |
| 5227458 |
Polycarbonate from dihydroxydiphenyl cycloalkane |
July 13, 1993 |
| Dihydroxydiphenyl cycloalkanes corresponding to the formula ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl and C.sub.7 -C.sub.12 aralkyl,m is an integer of fro |
| 5210328 |
Process for the preparation of substituted cycloalkylidene bisphenols |
May 11, 1993 |
| This invention relates to a process for the preparation of substituted cycloalkylidene bisphenols from phenols and special cycloalkanones in the presence of acid condensation catalysts and in the presence of water. |
| 5194467 |
Stabilization of highly heat distortion resistant polycarbonates |
March 16, 1993 |
| Highly heat distortion resistant moulding compositions are disclosed comprising an aromatic polycarbonate having molecular weights Mw (weight average) of a least 10,000, containing bifunctional carbonate structural units corresponding to formula (Ia) ##STR1## wherein R.sup.1 and |
| 5191001 |
Process for the production of solventless polycarbonate |
March 2, 1993 |
| A three-step process for the production of solventless polycarbonate is disclosed. Accordingly, a mixture of two different oligocarbonates each prepared by the interfacial method, is prepared in the first process step. In a second step, the mixture is crystallized. The third step entails |
| 5151452 |
Purification of polycarbonate and polyester carbonate waste |
September 29, 1992 |
| A process is disclosed for the purification of lacquer-and optionally dye and metal- containing waste of thermoplastic aromatic polycarbonates and/or thermoplastic aromatic polyester carbonates. The waste which result upon the production of moldings, such as audio compact discs, lenses f |
| 5149761 |
Aromatic ether imides |
September 22, 1992 |
| The new aromatic ether imides corresponding to the following formula ##STR1## may be used for the production of plastics which in turn may be worked up into moulded articles, films, sheet products and filaments. The plastics produced from the new aromatic ether imides are distinguish |
| 5147700 |
Molding compositions of low double refraction |
September 15, 1992 |
| The invention relates to thermoplastic molding compositions of PVC and (ter)polymers which can optionally be grafted on to a resin and are suitable for the production of optical discs by virtue of their extremely low double refraction. |
| 5145920 |
Oligomer epoxy resins based on cyclohexyldiphenol derivatives and reaction products thereof with |
September 8, 1992 |
| The invention relates to oligomer epoxy resins which are derived especially from diphenols or from diglycidyl ethers based on these phenols, oligomer epoxy resins containing oxazolidinone groups and based on the novel diglycidyl ethers and curable mixtures containing the novel oligomer e |
| 5145911 |
Polycarbonate molding composition |
September 8, 1992 |
| A thermoplastic molding composition comprising (i) an aromatic polycarbonate having high thermal dimensional stability and based on a substituted dihydroxydiphenylcycloalkane, (ii) other aromatic polycarbonate resin and (iii) graft, particle-type diene rubbers is disclosed. The compo |
| 5143973 |
Moulding compositions of low double refraction |
September 1, 1992 |
| The invention relates to thermoplastic molding compositions of PVC and (ter)polymers which can optionally be grafted on to a resin and are suitable for the production of optical discs by virtue of their extremely low double refraction. |
| 5137970 |
Polycarbonate/ABS compositions of high heat resistance |
August 11, 1992 |
| A molding composition comprising a mixture of an aromatic polycarbonate based on a substituted dihydroxy diphenylcyclohexane, a copolymer of a resin forming vinyl monomer and a graft polymer of a resin forming monomer onto a diene rubber, and a process for its manufacture and use for mak |
| 5134195 |
Ternary thermoplastic mixtures |
July 28, 1992 |
| The invention relates to ternary thermoplastic mixtures of polycarbonates, polyurethanes and graft polymers and, optionally, standard additives and to processes for the production of these mixtures. |
| 5132154 |
Polycarbonate mixtures in optical applications |
July 21, 1992 |
| An article for an optical application is disclosed comprisinga) about 0.1 to 99.9 wt. % of a thermoplastic, aromatic polycarbonate resin containing carbonate structural units corresponding to (Ia): ##STR1## wherein R.sup.1 and R.sup.2 independently represent hydrogen, halogen, C.sub |
| 5126495 |
Thermoplastic polyester carbonate-polysiloxane block copolymers |
June 30, 1992 |
| The new polyester carbonate-polysiloxane block copolymers having recurrent structural units of the following formulae ##STR1## have improved resistance to petrol compared with known polyester carbonate-polysiloxane block copolymers. They are used for the manufacture of moulded pr |
| 5126428 |
Polycarbonate from dihydroxy diphenyl cycloalkane |
June 30, 1992 |
| Dihydroxydiphenyl cycloalkanes corresponding to the formula ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl and C.sub.7 -C.sub.12 aralkyl,m is an integer of fro |
| 5115050 |
Polyamide moulding compositions containing finely divided polyarylene sulphides |
May 19, 1992 |
| The invention relates to a process for the preparation of polyamide moulding compositions containing 0.1 to 40 wt. % of a polyarylene sulphide by reaction of polyamide-forming components in the presence of polyarylene sulphides. |
| 5109076 |
Polydiorganosiloxane/polycarbonate block cocondensates based on certain dihydroxydiphenylcycloal |
April 28, 1992 |
| Thermoplastic polydiorganosiloxane/polycarbonate block copolymers based on dihydroxydiphenylcycloalkanes corresponding to the following general formula (I): ##STR1## wherein R.sup.1 and R.sup.2 independently represent hydrogen, halogen, preferably chlorine or bromine, C.sub.1 -C. |
| 5105004 |
Aromatic ethers |
April 14, 1992 |
| The new aromatic ethers of the formulae ##STR1## can be used for the preparation of plastics which, in turn, can be processed further to give moulded articles, films, foils and filaments. The plastics prepared from the new aromatic ethers are distinguished by exceptional dimensio |
| 5104963 |
Two-stage process for the production of polycarbonates based on special dihydroxydiphenylalkanes |
April 14, 1992 |
| A process for the preparation of a phenol and solvent free polycarbonate resin is disclosed comprising(i) forming an oligomeric polycarbonate comprising structural units based on a diphenol corresponding to ##STR1## wherein R.sup.1 and R.sup.2 independently of one another denote a m |
| 5104945 |
Heat resistant polycarbonate molding compositions |
April 14, 1992 |
| Thermoplastic molding compositions comprising mixtures ofa) 1-99 wt. % of a specific polycarbonate based on dihydroxydiphenylcycloalkanes,b) 1-99 wt. % of other polycarbonate, in particular those based on bisphenol A, andc) 1-95 wt. % of a silicone rubber, in particular silicone graft rubber |
| 5104723 |
Mixtures of special new polycarbonates with other thermoplastics or with elastomers |
April 14, 1992 |
| Mixtures containinga) thermoplastic polycarbonates based on diphenols corresponding to formula (I) ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl and c.sub |
| 5100960 |
Thermoplastic molding compositions of a polysiloxane block copolycarbonate and a polycarbonate b |
March 31, 1992 |
| The invention relates to a thermoplastic molding composition comprising(A) from 10 to 98 parts by weight of a polydiorganosiloxane-polycarbonate block copolymer having a weight average molecular weight of from 10,000 to 200,000 and containing from 75 to 97.5 wt. % of aromatic carbonate s |
| 5086159 |
Stabilized copolycarbonate from dihydroxy diphenyl cycloalkane |
February 4, 1992 |
| Copolycarbonates derived from known bisphenols and small quantities of dihydroxydiphenyl cycloalkanes corresponding to formula (I) ##STR1## wherein R.sup.1 and R.sup.2 denote, independently of one another, hydrogen, halogen, preferably chlorine or bromine, C.sub.1 -C.sub.8 alkyl, |
| 5086157 |
Aromatic polyether sulphones based on dihydroxy-diphenyl-cyclo-alkanes and films therefrom |
February 4, 1992 |
| Polyether sulphones based on diphenols corresponding to the following general formula (I): ##STR1## wherein R.sup.1 and R.sup.2, independently represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 or C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl, or C.sub.7 -C.sub.12 aralkyl; |
| 5084550 |
Copolycarbonate from mixture of polyarylene diol |
January 28, 1992 |
| The novel thermotropic polycarbonates having recurring structural units of the formulae ##STR1## have good mechanical properties and good processability. They can be used in conventional manner for manufacturing mouldings, filaments, fibres and films. |
| 5081269 |
Oligomer epoxy resins based on cyclohexyldiphenol derivatives and reaction products thereof with |
January 14, 1992 |
| The invention relates to oligomer epoxy resins which are derived especially from diphenols or from diglycidyl ethers based on these phenols, oligomer epoxy resins containing oxazolidinone groups and based on the novel diglycidyl ethers and curable mixtures containing the novel oligomer e |
| 5076987 |
Process for the production of optically isotropic extrusion films |
December 31, 1991 |
| A process for the production of optically isotropic extrusion films is disclosed. Accordingly in a first process step a thermoplsatic resin is extruded to form a film having a thickness below 600 .mu.m. The second process step entailsa) calendering said film between a ground elastic roll |
| 5068302 |
Polysiloxane-polycarbonate block copolymers based on certain dihydroxydiphenylcycloalkanes |
November 26, 1991 |
| Polydiorganosiloxane-polycarbonate block copolymers based on dihydrodiphenylcycloalkanes corresponding to formula (I) ##STR1## in which R.sup.1, R.sup.2 independently of one another represent hydrogen, halogen, preferably chlorine or bromine, C.sub.1-8 alkyl, C.sub.5-6 cycloalkyl |
| 5066776 |
Process for the manufacture of polyarylene sulphides |
November 19, 1991 |
| The invention concerns a process for the manufcture of polyarylene sulphides from alkali sulphide and aromatic dihalogen compounds, whereby the alkali sulphide is produced in situ. |
| 5056617 |
Diaphragm for loudspeaker |
October 15, 1991 |
| The positive characteristics of loudspeaker diaphragms are improved by the use of a thermoplastic polyurethane sheet with a thickness of 0.06 to 0.8 mm at least for the moving part (1). |
| 5037939 |
Thermotropic, fully aromatic polyesters prepared by polycondensation of aromatic diphenols and a |
August 6, 1991 |
| Thermotropic, fully aromatic polyesters which have been prepared by polycondensation of p-hydroxybenzoic acid, hydroquinone, 4,4-dihydroxydiphenyl, terephthalic acid and isophthalic acid and which contain specific amounts of the radicals of the compounds mentioned are distinguished b |
