Abstract: In a process for preparing block copolymers of styrene or its equivalents on the one hand and of butadiene or its equivalents on the other hand by sequential anionic polymerization, in which a first monomer and the organometallic compound serving as initiator are first of all combined to form a reaction mixture and the reaction is continued until at least part of the first monomer has been consumed, and then at least one further monomer is added and is in each case partially or completely reacted, the polymerization is carried out continuously in a conventional manner in a tubular reactor, the reaction of in each case one monomer being carried out in each case in one reactor section and at least two reactor sections being separated by a mixing stretch.

Abstract: A process of hydrogenation in solution of polymers of conjugated dienes in the presence of homogeneous catalysts which contain, as an essential component, a titanium compound of the type Cp.sub.2 Ti(PhOR).sub.2, where Cp is a cylopentadienyl group, ph a phenyl group, and OR an alkoxide group containing 1 to 4 carbon atoms; or a titanium compound of the type Cp.sub.2 TiR.sub.2, where R is a Ch.sub.2 PPh.sub.2 group.These catalysts are very active in the selective hydrogenation of the double bonds of the diene units of polymers or copolymers of conjugated dienes having number-averaged molecular weights or between approximately 500 and 1,000,000 and, in particular, of random and block copolymers of styrene and butadiene or isoprene, the latter containing at least one styrene block and one polybutadiene and/or polyisoprene block.

Abstract: A low viscosity adhesive composition which comprises:(a) an asymmetric radial block copolymer of a vinyl aromatic hydrocarbon and at least one conjugated diene having from 3 to 6 polymer arms, which:(i) contains from 33 to 85% by weight of polyvinyl aromatic hydrocarbon block/polydiene block copolymer arms and the balance polydiene homopolymer arms,(ii) has vinyl aromatic hydrocarbon blocks with block molecular weights of from 8000 to 30,000,(iii) has conjugated diene blocks in the copolymer arms with a molecular weight of at least 6000, and(iv) has a polyvinyl aromatic hydrocarbon content of from 10 to 40% by weight; and(b) from 20 to 400 parts per hundred parts of polymer of a tackifying resin.The invention also encompasses the polymers used in the adhesive.

Abstract: A thermoplastic polymer composition which comprises100 parts by weight of polypropylene (1);5 to 100 parts by weight of a hydrogenated block copolymer (2) which has at least one block A, at least one block B and at least one block C and which has a number average molecular weight of not higher than 700,000 wherein the block A consists essentially of a butadiene polymer having a number average molecular weight of 2500 to 200,000 and a vinyl bond content of not higher than 20%, the block B consists essentially of a polymer of isoprene and butadiene at a ratio by weight of 30:70 to 100:0 and has a number average molecular weight of 30,000 to 300,000 and a vinyl bond content of not higher than 20%, and the block C consists essentially of a polymer of isoprene and butadiene at a ratio by weight of 0:100 to 100:0 and has a number average molecular weight of not higher than 200,000 and a vinyl bond content of not less than 40%; and0 to 100 parts by weight of an ethylene/propylene rubber wherein the ratio of the melt

Abstract: Disclosed is a thermoplast resin composition comprising:30 to 97% by weight of at least one of(a) a crystalline thermoplastic resin component and(b) a non-crystalline thermoplastic resin component,3 to 70% by weight of (c) a rubbery polymer component which is ununiformly mixed with at least one of Component (a) and Component (b) and0 to 40% by weight of (d) an inorganic filler,wherein Component (c) forms a network and at least one of the ratio of flexural modulus of Component (a) to Component (c) and that of Component (b) to Component (c) is 5 or more.

Abstract: Disclosed is a fiber-forming polymer blend, comprising:a) a polyamide;b) a miscible amorphous polymer; andc) an immiscible amorphous polymer.

Abstract: Process for the preparation of an efficient industrial .alpha., .omega.-dilithio poly(conjugated diene) diinitiator having a peak molecular weight in the range of from 1000 to 3000, comprising the reaction of mono-organolithium initiator with diisopropenyl benzene in an apolar hydrocarbon solvent, optionally in the presence of a tertiary amine, followed by addition to the reaction mixture of a small amount of conjugated diene monomer and at least 15 vol % of an aromatic ether activator at a temperature in the range of from 0.degree. to 30.degree. C.; the use of said .alpha., .omega.-dithio initiator for the manufacture of symmetrical block copolymers by anionic polymerization, from monovinylaromatic, conjugated diene and/or polar vinyl compound monomers; and block copolymers so obtained having a combination of a narrow molecular weight distribution (Mw/Mn.ltoreq.1.20) and relatively low vinyl content (.ltoreq.18%).

Abstract: A low viscosity adhesive composition which comprises:(a) an asymmetric radial block copolymer of a vinyl aromatic hydrocarbon and at least one conjugated diene having from 3 to 6 polymer arms, which:(i) contains from 33 to 85% by weight of polyvinyl aromatic hydrocarbon block/polydiene block copolymer arms and the balance polydiene homopolymer arms,(ii) has vinyl aromatic hydrocarbon blocks with block molecular weights of from 8000 to 30,000,(iii) has conjugated diene blocks in the copolymer arms with a molecular weight of at least 6000, and(iv) has a polyvinyl aromatic hydrocarbon content of from 10 to 40% by weight; and(b) from 20 to 400 parts per hundred parts of polymer of a tackifying resin.The invention also encompasses the polymers used in the adhesive.

Abstract: A coated golf ball comprising a core, a cover layer covering said core and a white paint layer coated on said cover wherein said cover is mainly composed of trans-polyisoprene, said paint layer comprises one or more white coating layers and clear coating layers, a white paint for forming said white paint layer contains 20 to 70% by weight of a white pigment and 0.005 to 0.10% by weight of a blue pigment based on a solid content of the white paint, and said blue pigment is selected from the group consisting of .di-elect cons.-phthalocyanine blue and indanthrone blue.

Abstract: A crosslinked thermoplastic elastomer blend prepared by the process comprising blending together:(a) a thermoplastic resin containing at least three alternating blocks:A.sub.x --B--A.sub.xwherein A is a block of at least one polymerized unsaturated ethylene monomer of the following formula:--CH.sub.2 --C(R.sub.1)(R.sub.2)--wherein R.sub.1 and R.sub.2 are each a hydrogen, alkyl or aromatic group, provided that when one of R.sub.1 or R.sub.2 is a hydrogen or an alkyl group, the other R group is an aromatic group; andwherein B is a block of a polymer or copolymer containing at least one conjugated diene monomer in polymerized form, having at least four (4) carbon atoms and the following formula for the residual double bond in the diene after polymerization:--C(R.sub.3)(R.sub.4)--C(R.sub.5).dbd.C(R.sub.6)--C(R.sub.7)(R.sub.8)--wherein R.sub.3 -R.sub.

Abstract: The present invention relates to biodegradable PHA copolymers comprising at least two randomly repeating monomer units (RRMU) wherein the first RRMU has the structure ##STR1## wherein R.sup.1 is H or C.sub.2 alkyl, and n is 1 or 2; the second RRMU has the structure ##STR2## ; and wherein at least 50% of the RRMUs have the structure of the first RRMU. The present invention further relates to plastic articles comprising said biodegradable PHA copolymers. The present invention further relates to an absorbent article comprising a liquid pervious topsheet, a liquid impervious backsheet comprising a film comprising a PHA of the present invention and an absorbent core positioned between the topsheet and the backsheet.

Abstract: A article for wrapping objects comprising a plurality of layers, including a first layer of a wrap material, an intermediate layer of an adhesive material and an inner layer of a solids material, said article providing resistance to cathodic disbondment from said object at least equal to an adhesive bearing wrap applied with a solvent based primer.

Abstract: Polyimide oligomers include (1) linear, monofunctional crosslinking oligomers prepared by condensing a monoanhydride end cap with a diamine that includes alternating ether and "sulfone" (--SO.sub.2 --, --S--, --CO--, --(CF.sub.3).sub.2 C--, or --(CH.sub.3).sub.2 C--) linkages connecting alternating aromatic radicals and with a dianhydride (or dianhydride mixture), particularly the unsaturated, aliphatic dianhydride commonly known as MCTC; (2) linear, mono- or difunctional crosslinking oligomers prepared by condensing an amine end cap with a diamine and a dianhydride; and (3) multidimensional, crosslinking oligomers having an aromatic hub and at least three radiating arms connected to the hub, each arm including a crosslinking end cap at its distal end and at least one imide linkage. Blends, prepregs, and composites can be prepared from the oligomers.

Abstract: A block copolymer containing a non-polar polymer block and a polar polymer block was prepared by using an anionic polymerization initiator, by reacting an organic compound which can form an ate complex at the active end of the non-polar polymer block, the compound which contains a main group element of II or III group, before the addition of the polar monomer.

Abstract: The present invention provides a coated golf ball wherein the whitening of the color tone is enhanced and weathering properties are improved. The golf ball body having a cover mainly composed of an ionomer resin is coated with a white paint. The paint layer of the coated golf ball comprises at least one white paint layer and at least one clear paint layer. The white paint comprises 3 to 15% by weight of a white pigment, 0.0005 to 0.0250% by weight of a blue pigment and 0.001 to 0.010% by weight of a red pigment, based on 100% by weight of the solid content of the coating. The weight ratio of the blue pigment to the red pigment is 0.1 to 2.0.

Abstract: The present invention provides a coated golf ball having beautiful appearance, wherein the whiteness thereof is enhanced by inhibiting the enhancement of blueness. The golf ball body of the coated golf ball is coated with a white paint containing titanium oxide as a main pigment. The white paint comprises 45 to 60% by weight of titanium oxide, 0.005 to 0.20% by weight of a blue pigment and 0.001 to 0.06% by weight of a red pigment, based on 100% by weight of a solid content of a coating. The weight ratio of the blue pigment to the red pigment is 0.9 to 5.

Abstract: The present invention provides a novel multi-arm block copolymer, a novel pressure-sensitive adhesive made from a multi-arm elastomeric block copolymer, and a novel tape made therefrom. The multi-arm block copolymer has the general structure (A-B).sub.m Y(C-D).sub.n wherein A, B, C and D are polymer segments; Y is a residue of a multifunctional coupling agent; and m and n are the number of arms, where m and n are greater than 0 and the sum of m plus n is at least 3. A comprises a random copolymer of a monoalkenylarene and a conjugated diene; B and C comprise either a homopolymer of a conjugated diene or a polymer of two or more conjugated dienes; D comprises either a homopolymer of a monoalkenylarene or a copolymer of a monoalkenylarene and a conjugated diene wherein the Tg of D is greater than the Tg of A; and the weight percent of monoalkenylarene in the block copolymer is 40% or less.

Abstract: The present invention relates to biodegradable PHA copolymers comprising at least two randomly repeating monomer units (RRMU) wherein the first RRMU has the structure ##STR1## wherein R.sup.1 is H or C.sub.2 alkyl, and n is 1 or 2; the second RRMU has the structure ##STR2## and wherein at least 50% of the RRMUs have the structure of the first RRMU. The present invention further relates to plastic articles comprising said biodegradable PHA copolymers. The present invention further relates to an absorbent article comprising a liquid pervious topsheet, a liquid impervious backsheet comprising a film comprising a PHA of the present invention and an absorbent core positioned between the topsheet and the backsheet.

Abstract: A resin composition which is a suitable component of a container which is superior in oil resistance and not deformed or swelled, even by oily filled contents in preservations. Additionally, the container made of the resin composition is superior in flexibility, squeezing capability, pressing out capability, pinch off adhesion capability, and heat sealing capability. According to this invention, there is provided a blended resin composition comprising at least one kind of a first polyester resin selected from the group consisting of amorphous polyester resins and polyester resin having a peak area of not more than 20mJ/g, which has a glass-transition temperature not less than 50.degree. C. and at least one kind of a second polyester resin which has a glass-transition temperature not more than 40.degree. C. The first polyester resin has a first peak representing a temperature dependency of tan .delta.. The second polyester resin has a second peak representing said temperature dependency of tan .delta..

Abstract: The present invention is directed to a process for forming a thermoplastic composition from carpet wherein a carpet sample are melt blended without separating the carpet into its component parts. The process of the present invention produces a thermoplastic composition useful as a substitute for virgin thermoplastics in a variety of applications.