Abstract: A composition comprising in admixture with a polymer, preferably a polyurethane, and a compatible surface-modifying macromolecule having (i) a central portion of a segmented block oligomeric copolymer comprising at least one polar hard segment, and (ii) .varies.-.omega. terminal polyfluoro oligomeric groups, in a surface modifying enhancing amount. The composition is of use in providing articles having improved surface properties, particularly, medical devices having improved resistance to enzyme degradation with acceptable blood compatibility.

Abstract: The invention relates to crosslinked polymers, which are polymerisation products of a polymerisable mixture that comprises the following components:a) a macromer of formula C ##STR1## wherein Macro is an m-valent radical of a macromer from which the number m of groups Rx.sub.x --H has been removed,each R.sub.x, independently of the others, is a bond, --O--, --NR.sub.N -- or --S-- wherein R.sub.N is hydrogen or lower alkyl,PI* is a bivalent radical of a photoinitiator,R.sub.aa is the moiety of a photoinitiator that forms the less reactive free radical on cleavage of the photoinitiator, andm is an integer from 1 to 100,b) a copolymerisable vinyl monomer andc) a copolymerisable crosslinker.The polymers are suitable especially for the production of mouldings, such as for contact lenses.

Abstract: The present invention relates to new block copolymers of chemically modified polyolefins and thermoplastic polyurethanes, copolyesters or copolyamides a method for the preparation of said block copolymers and their use for compatibilizing blends of polar and non-polar thermoplastic elastomers. The block copolymers according to the present invention can further be used for promoting the adhesion of thermoplastic elastomers onto various polar engineering resins.

Abstract: A composition comprising discrete particles of elastomeric triblock copolymer, the particles having a Shore A hardness of less than 30 suspended in a continuous phase matrix of noncellular elastomeric polyurethane polymer, in which the triblock copolymer has the configuration A-X-A in which block A is polystyrene and block X is a polymer of butadiene, isoprene or copolymer of ethylene and butylene; the final composition having a Shore A hardness of less than 20.

Abstract: This invention relates to a catalyzed reactive hot melt adhesive comprising a) a reactive polyurethane adhesive and b) from about 0.005% to about 0.04% by weight of a catalyst selected from the group consisting of 2,2-dimorpholinoethyl ether and di(2,6-dimethyl morpholinoethyl) ether.

Abstract: The present invention provides a primer composition comprising an aliphatic isocyanate-containing compound, a nonhalogenated hydrocarbon polymer containing organic functional groups, a halogenated hydrocarbon polymer optionally containing organic functional groups, and an organic solvent.

Abstract: The invention provides a process for the preparation of a thermoplastic elastomeric resin composition comprising melt kneading(a) 100 parts by weight of a block copolymer consisting of at least two polymeric blocks (A) composed mainly of a vinyl aromatic compound and at least one polymeric block (B) composed mainly of a conjugated diene compound, and/or a hydrogenated block copolymer obtained by hydrogenating said block copolymer,(b) 20 to 300 parts by weight of a non-aromatic softening agent for rubber,(c) 1 to 150 parts by weight of a peroxide-crosslinking type olefinic resin and/or a copolymeric rubber containing said resin, and(d) 10 to 150 parts by weight of a peroxide-decomposing type olefinic resin and/or a copolymer containing said resin,characterized in that the process comprises a step of heat-processing component (a), component (b), at least a part of component (c), at least a part of component (d) and at least a part of 1.

Abstract: The present invention relates to a thermoplastic elastomer composition comprising the following components (A) and (B), and to a composite molded product comprising a resin layer and an elastomer layer containing said composition as the base material. Component (A): 5 to 95% by weight of a styrene type block copolymer or a hydrogenated product thereof, comprising block (a) which is made of a polymer of styrene or a derivative thereof, and block (b) which is made of an isoprene homopolymer or a copolymer of isoprene and butadiene, wherein the total amount of the 1,2-bond and the 3,4-bond in the isoprene polymer part in block (b) is not less than 40% of the total isoprene bond unit. Component (B): 95 to 5% by weight of one or more thermoplastic elastomers which are selected from the group consisting of polyester type thermoplastic elastomers, polyamide type thermoplastic elastomers, and polyurethane type thermoplastic elastomers.

Abstract: A resin composition containing (A) a thermoplastic polyurethane; (B) a polymer having a hydroxyl group at the end of the molecular main chain, the main chain principally comprising a conjugated diene compound unit (I) which may or may not be hydrogenated and an aromatic vinyl compound unit (II); and (C) a polyacetal resin, at ratios of (A), (B) and (C) being 2.5 to 90% by weight, 2.5 to 90% by weight and 5 to 95% by weight, respectively, on the basis of the total weight of the (A), (B) and (C), is excellent in terms of tensile strength and tensile elongation, and impact resistance at ambient temperature and lower temperatures.

Abstract: Multiple component polymer compositions for fabrication into articles. In particular, polymeric compositions comprising a heat resistant polymer; a radio frequency ("RF") susceptible polymer; a compatibilizing polymer; the composition having physical properties within the range a<40,000 psi; b>=70%; c<30%; d>1.0; e<0.1%; f<0.1%; g>=0.05; h<=60%; i=0; wherein: a is the mechanical modulus of the composition measured according to ASTM D-882; b is the percent recovery in length of the composition after an initial 20% deformation; c is the optical haze of the composition being 9 mils in thickness according to ASTM D-1003; d is the loss tangent of the composition at 1 Hz measured at melt processing temperatures; e is the elemental halogen content by weight of the composition; f is the low molecular weight water soluble fraction of the composition; g is the dielectric loss between 1 and 60 MHz and over temperatures of 25.degree. to 250.degree. C.

Abstract: The present invention relates to new block copolymers of chemically modified polyolefins and thermoplastic polyurethanes, copolyesters or copolyamides a method for the preparation of said block copolymers and their use for compatibilizing blends of polar and non-polar thermoplastic elastomers. The block copolymers according to the present invention can further be used for promoting the adhesion of thermoplastic elastomers onto various polar engineering resins.

Abstract: Multiple component polymer compositions for fabrication into articles. In particular, polymeric compositions comprising a heat resistant polymer; a radio frequency ("RF") susceptible polymer; a compatibilizing polymer; the composition having physical properties within the range a<40,000 psi; b>=70%; c<30%; d>1.0; e<0.1%; f<0.1%; g>=0.05; h<=60%; i=0; wherein: a is the mechanical modulus of the composition measured according to ASTM D-882; b is the percent recovery in length of the composition after an initial 20% deformation; c is the optical haze of the composition being 9 mils in thickness according to ASTM D-1003; d is the loss tangent of the composition at 1 Hz measured at melt processing temperatures; e is the elemental halogen content by weight of the composition; f is the low molecular weight water soluble fraction of the composition; g is the dielectric loss between 1 and 60 MHz and over temperatures of 25.degree. to 250.degree. C.

Abstract: A hemocompatible surface-modifying additive is provided for modifying polyurethane or polyurethane urea substrates. The additive has a polyurethane or polyurethane urea hard block or an alternative block which is miscible with the poly(urethane) or poly(urethane-urea) base polymer, a polysiloxane hydrophobic soft block, an optional hydrophilic spacer and a peptide selected from the group consisting of Arg-Gly-Asp, X-Arg-Gly-Asp, Arg-Gly-Asp-X and X-Arg-Gly-Asp-X', wherein X and X' are amino acids.

Abstract: The specification discloses a method and additive for increasing the surface activity of non-polar polymeric materials, and a non-polar polymeric material exhibiting increased surface activity. The invention employs an additive of the formulaA-B-A.sup.1wherein each of the A and A.sup.1 blocks which may be the same or different has a number molecular weight in the range of from about 200 to about 1000 daltons and is selected from the group substituted and unsubstituted alkyl, cycloalkyl, alkenyl, cycloalkenyl, aryl and alkylaryl units derived from one or more esters, organic acids, organic halides or organic acid halides, and units derived from alkyl or aryl isocyanates or ester-amides. The B-block is a polyepichlorohydrin unit derived from a polyepichlorohydrin polyol having at least two terminal hydroxyl groups and having an average molecular weight in the range of from about 400 to about 4000 daltons.

Abstract: A thermoplastic resin composition includes 40-75 parts by weight of a polyamide resin (A), 5-30 parts by weight of a modified polyphenylene ether (B) which is a polyphenylene ether modified with an .beta., .beta.-unsaturated carboxylic acid or a derivative thereof, 1-30 parts by weight of an aromatic vinyl compound-aliphatic hydrocarbon copolymer (C), and 1-30 parts by weight of an ethylene-.alpha.-olefin copolymer (D) or a polypropylene resin (E) with the total amount of the components (A), (B), (C), and (D) or (E) being 100 parts by weight. The polyamide resin (A) is present as a matrix phase and the other components (B), (C), and (D) or (E) are present as a disperse phase consisting of core-shell structure grains, in each of which grains the modified polyphenylene ether (B) forms a shell phase, the aromatic vinyl compound-aliphatic hydrocarbon copolymer (C) forms an intermediate phase and the ethylene-.alpha.-olefin copolymer(D) or the polypropylene resin (E) forms a core phase.

Abstract: An extruder screw having a plurality of plasticating sections sufficient for plasticating polymeric materials of different bulk density.

Abstract: Thermoplastic elastomers (TPEs) containing side chain crystalline (SCC) blocks. The SCC blocks my be hard (A) blocks or the soft (B) blocks (or both) in the TPE. Some of these TPEs are novel, e.g. those in which A blocks are SCC blocks, and the B blocks are polyethers, polyacrylates, polyamides, polyurethanes or polysiloxanes. The SCC-containing TPEs are particularly useful as matrix materials for other components which are dispersed therein, e.g. energetic solids and other thermally responsive materials.

Abstract: A polymeric resin for optical fiber strips is formed from a mixture comprising a first base polymer selected from an epoxy acrylate and a urethane acrylate and a copolymer in a proportion of between 0.5% and 20% by weight of said mixture which is compatible with said first polymer and carries polysiloxane chains.

Abstract: A compatibilized thermoplastic molding composition containing polyurethane and polyolefin resins is disclosed. Accordingly, a particularly structured copolymer having a number average molecular weight of about 25,000 to 350,000 and containing blocks of monoalkylene arene and either hydrogenated conjugated diene or non-hydrogenated conjugated diene, was found to compatibilize the composition. Articles molded from the composition are characterized by their good mechanical properties.

Abstract: A catalyzed polyurethane reactive hot melt adhesive is prepared from a reactive polyurethane prepolymer and 0.05 to 0.6% by weight of a 2,2'dimorpholinoethyl ether or di(2,6-dimethylmorpholinoethyl)ether catalyst. The adhesive is characterized by improved curing speed with little or no effect on the thermal stability.

Abstract: Polycarbonate is admixed in compositions with poly(phenylene ether), and/or with a poly(phenylene ether) concentrate containing poly(phenylene ether), polystyrene, a vinyl aromatic copolymer, polyamide, polycarbonate, polyester, poly(alkyl acrylate), and/or poly(alkyl methacrylate). The blended compositions may also optionally contain additional vinyl aromatic copolymer as a separate component, impact modifiers, thermoplastic molding materials including polystyrene, polyolefin, polyamide, poly(vinyl chloride), polyurethane, polyacetal, and conventional additives such as dyes and pigments.

Abstract: A thermoplastic polymer composition comprises:a thermoplastic polymer (a) having polarity on the main chain of the molecule thereof, anda modified block copolymer (b) of a block copolymer comprising:at least one polybutadiene block (B) having a degree of vinylization of not more than 30%, andat least one polymer block (D) comprising units from isoprene and butadiene in a ratio by weight of isoprene/butadiene of 30/70 to 100/0 and having a degree of vinylization of not more than 30%,said polybutadiene block (B) and said polymer block (D) each has a degree of unsaturation of not more than 30%, to said block copolymer a molecular unit containing a carboxyl acid group or derivatives thereof having added, the ratio by weight between said component (a) and said component (b), (a)/(b), being in a range of 2/98 to 98/2.

Abstract: The present invention provides a toughened epoxy resin composition comprising:(a) a curable aromatic epoxy resin,(b) an epoxidized low viscosity polydiene polymer wherein the polymer contains from 1.0 to 7.0 milliequivalents of epoxy per gram of polymer, and(c) a curing agent.

Abstract: A thermoplastic polymer composition comprises: a thermoplastic polymer (a) having polarity on the main chain of the molecule thereof, and a modified block copolymer (b) of a block copolymer comprising:at least one polybutadiene block (B) having a degree of vinylization of not more than 30%, andat least one polymer block (D) comprising units from isoprene and butadiene in a ratio by weight of isoprene/butadiene of 30/70 to 100/0 and having a degree of vinylization of not more than 30%, said polybutadiene block (B) and said polymer block (D) each has a degree of unsaturation of not more than 30%, to said block copolymer a molecular unit containing a carboxyl acid group or derivatives thereof having added, the ratio by weight between said component (a) and said component (b), (a)/(b), being in a range of 2/98 to 98/2.

Abstract: A thermoplastic elastomer composition comprises the following two components:(a) a thermoplastic polyurethane having soft segments from a poly (3-methyl-1,5-pentane adipate) diol having a molecular weight of at least 2,000 and having a JIS A hardness at 25.degree. C. of not more than 80, and(b) a block copolymer comprising at least 2 polymer blocks A principally comprising an aromatic vinyl compound and at least 1 block B comprising an olefinic elastomer, said aromatic vinyl compound being contained in an amount of 5 to 50% by weight based on the weight of the block copolymer and the olefinic elastomer block having a glass transition point of not higher than -20.degree. C. and a heat of fusion of crystal of not more than 8 cal/g;the ratio by weight between the component (a) and the component (b) being (a)/(b)=95/5 to 5/95.