| Patent Number |
Title Of Patent |
Date Issued |
| RE30460 |
Coupling of alkali metal-terminated polymers |
December 23, 1980 |
| Alkali metal-terminated polymers of one or more alkadienes and of one or more vinyl-substituted aromatic monomers are effectively coupled by an anhydride of a monocarboxylic acid having 2 to 8 carbon atoms per molecule. |
| 6835778 |
Conjugated diene/monovinylarene block copolymers blends |
December 28, 2004 |
| This invention relates to polymer blends, which comprise at least one tapered conjugated diene-monovinylarene block copolymer and at least one styrenic polymer. The polymer blends possess good optical and mechanical properties. |
| 6444755 |
Conjugated diene/monovinylarene block copolymers blends |
September 3, 2002 |
| A block copolymer comprising at least three consecutive conjugated diene/monovinylarene tapered blocks is provided. Other aspects of this invention include a polymerization process for preparing the block copolymer and polymer blends comprising the block copolymer. The block copolyme |
| 6420486 |
Conjugated diene/monovinylarene block copolymers, methods for preparing same, and polymer blends |
July 16, 2002 |
| A block copolymer comprising at least three consecutive conjugated diene/monovinylarene tapered blocks is provided. Other aspects of this invention include a polymerization process for preparing the block copolymer and polymer blends comprising the block copolymer. The block copolyme |
| 6265485 |
Tapered block copolymers of monovinylarenes and conjugated dienes |
July 24, 2001 |
| A method for preparing tapered block copolymers which are particularly useful for blend components in blends with polymers of styrene. In the first embodiment of this invention the copolymers are prepared in a polymerization process by sequentially charging: (1) an initiator and mono |
| 6265484 |
Tapered block copolymers of monovinylarenes and conjugated dienes |
July 24, 2001 |
| A method for preparing tapered block copolymers which are particularly useful for blend components in blends with polymers of styrene. In the first embodiment of this invention the copolymers are prepared in a polymerization process by sequentially charging: (1) an initiator and mono |
| 6232415 |
Process to produce a monovinylaromatic/ monoolefin polymer and said monovinylaromatic/monoolefin |
May 15, 2001 |
| A process to produce a monovinylaromatic/monoolefin polymer is provided. Said monovinylaromatic/monoolefin polymer is provided. |
| 6232414 |
Process to make a monovinylaromatic polymer and said monovinylaromatic polymer |
May 15, 2001 |
| A process to produce a monovinylaromatic polymer is provided. Said monovinylaromatic polymer is provided. |
| 6127487 |
Process to produce coupled block copolymers and said copolymers |
October 3, 2000 |
| This invention provides a process to produce coupled block copolymers and said coupled block copolymers. |
| 6096828 |
Conjugated diene/monovinylarene block copolymers, methods for preparing same, and polymer blends |
August 1, 2000 |
| A block copolymer comprising at least three consecutive conjugated diene/monovinylarene tapered blocks is provided. Other aspects of this invention include a polymerization process for preparing the block copolymer and polymer blends comprising the block copolymer. The block copolyme |
| 6093285 |
Purification of 1,3-butadiene |
July 25, 2000 |
| A system and process for purifying a 1,3-butadiene feedstock containing 1,3-butadiene and various impurities by first introducing the 1,3-butadiene feedstock stream to a separation column to produce an intermediate product stream containing 1,3-butadiene and residual impurities and t |
| 6066708 |
Copolymer production, product thereof and diluent removal therefrom |
May 23, 2000 |
| This invention provides a process to produce a composition that comprises diluent and copolymer and also provides the composition. The process of this invention comprises: (a) producing a composition that comprises diluent and copolymer; and (b) removing a portion of said diluent from |
| 5910546 |
Tapered block copolymers of monivinylarenes and conjugated dienes |
June 8, 1999 |
| A method for preparing tapered block copolymers which are particularly useful for blend components in blends with polymers of styrene. In the first embodiment of this invention the copolymers are prepared in a polymerization process by sequentially charging: (1) an initiator and mono |
| 5705569 |
Block copolymers of monovinylarenes and conjugated dienes and preparation thereof |
January 6, 1998 |
| A method for preparing resinous polymodal monovinylarene-conjugated diene block copolymers and polymers produced thereby are provided. The method comprises sequentially contacting under polymerization conditions:(a) a monovinylarene monomer and initiator;(b) initiator and a monovinylarene mo |
| 5587425 |
Blends of copolymers of monovinylarenes and conjugated dienes containing two interior tapered bl |
December 24, 1996 |
| A method for preparing blends of a copolymer in a polymerization process by sequentially charging: (1) an initiator and monovinylaromatic monomer in the presence of a randomizer; (2) an initiator and monovinylaromatic monomer; (3) a mixture of monovinylaromatic and conjugated diene monom |
| 5545690 |
Tapered block copolymers of monovinylarenes and conjugated dienes |
August 13, 1996 |
| A method for preparing tapered block copolymers which are particularly useful for blend components in blends with polymers of styrene. In the first embodiment of this invention the copolymers are prepared in a polymerization process by sequentially charging: (1) an initiator and mono |
| 5438103 |
Block copolymers of monovinylaromatic and conjugated diene monomers |
August 1, 1995 |
| A method for preparing block copolymers from which can be made transparent blue articles comprising sequentially charging under polymerization conditions at least one monovinylaromatic monomer and at least one conjugated diene monomer, wherein at least the first monomer charge is a m |
| 5436298 |
Block copolymers of monovinylarenes and conjugated dienes and preparation thereof |
July 25, 1995 |
| A method for preparing resinous polymodal monovinylarene-conjugated diene block copolymers and polymers produced thereby are provided. The method comprises sequentially contacting under polymerization conditions:(a) a monovinylarene monomer and initiator;(b) initiator and a monovinylarene mo |
| 5422389 |
Method for stabilizing monovinylarene/conjugated diene copolymers and a method for preparing a s |
June 6, 1995 |
| A process for stabilizing polymers is provided comprising:(1) contacting at least one hindered phenolic compound and an organic phosphite to form a stabilizing mixture,wherein said contacting is at a temperature sufficient to at least partially dissolve said hindered phenolic compound,wherei |
| 5399628 |
Block copolymers of monovinylarenes and conjugated dienes containing two interior tapered blocks |
March 21, 1995 |
| A method for preparing tapered block copolymers in a polymerization process by sequentially charging: (1) an initiator and monovinylaromatic monomer in the presence of a randomizer; (2) an initiator and monovinylaromatic monomer; (3) a mixture of monovinylaromatic and conjugated diene mo |
| 5393838 |
Conjugated diene/monovinylarene block copolymers with multiple tapered blocks |
February 28, 1995 |
| A method for preparing polymodal tapered block copolymers in a polymerization process by sequentially charging: (a) an initiator and monovinylaromatic monomers in the presence of a randomizer; (b) an initiator and monovinylaromatic monomers; (c) a mixture of monovinylaromatic and con |
| 5384349 |
Conjugated diene/monovinylarene copolymers and preparation thereof |
January 24, 1995 |
| A block copolymer comprising about 5 weight percent to about 95 weight percent monovinylarene monomer, about 95 to about 5 weight percent butadiene, and an effective amount of a thermal stabilizing agent selected from the group consisting of ascorbic acid, citric acid, disodium citrate, |
| 5319033 |
Tapered block monovinyl aromatic/conjugated diene copolymer |
June 7, 1994 |
| A method for preparing tapered block copolymers in a polymerization process by charging an initiator and monomers sequentially with one or more charges of first one of the monomers, then with a mixture of the two monomers, and then with one or more charges of the second monomer alter |
| 5290875 |
Conjugated diene/monovinylarene block copolymers with multiple tapered blocks |
March 1, 1994 |
| A method for preparing polymodal tapered block copolymers in a polymerization process by sequentially charging: (a) an initiator and monovinylaromatic monomers in the presence of a randomizer; (b) an initiator and monovinylaromatic monomers; (c) a mixture of monovinylaromatic and con |
| 5270396 |
Sequential coupling in formation of resinous block copolymers |
December 14, 1993 |
| A method for preparing resinous copolymers by sequential charge copolymerization of at least two charges, at least one being a conjugated diene and at least one being a monovinylarene; followed by a charge of a polyfunctional coupling agent; and the final charge being an essentially |
| 5256736 |
Tapered block copolymers of conjugated dienes and monovinylarenes |
October 26, 1993 |
| A method for preparing tapered block copolymers in a polymerization process by sequentially charging: (1) an initiator and monovinylaromatic monomers in the presence of a randomizer; (2) an initiator and a mixture of monovinylaromatic and conjugated diene monomers; (3) an initiator and a |
| 5227419 |
Tapered block styrene/butadiene copolymers |
July 13, 1993 |
| A method for preparing tapered block copolymers in a polymerization process by charging an initiator and monomers sequentially with one or more charges of first one of the monomers, then with a mixture of the two monomers, and then with one or more charges of the first monomer to pro |
| 5220178 |
Apparatus and process for detecting the presence of defects on a moving sheet of material |
June 15, 1993 |
| A defect detection system for the optical inspection of defects in transparent and translucent sheets of materials. The system utilizes the differing optical properties of different defects to distinguish between such defects as fisheye defects, speck defects and scratches. |
| 5130377 |
Tapered block styrene/butadiene copolymers |
July 14, 1992 |
| A method for preparing tapered block copolymers in a polymerization process by charging an initiator and monomers sequentially with one or more charges of first one of the monomers, then with a mixture of the two monomers, and then with one or more charges of the second monomer alter |
| 4405754 |
Haze-free, clear, impact-resistant resinous polymers |
September 20, 1983 |
| Haze-free, clear, impact-resistant resinous copolymers are produced by coupling polymer-lithium with a mixture of coupling agents wherein one is a lactone such as butyrolactone and the other is a halo-silane such as phenyltrichlorosilane. The combination of coupling agents reduces haze, |
| 4403074 |
Clear haze-free impact-resistant resinous polymers |
September 6, 1983 |
| Clear, haze-free, colorless, impact-resistant resinous copolymers are produced by terminating the coupled polymer-lithium with water and linear saturated aliphatic dicarboxylic acids selected from C.sub.2, C.sub.3, and C.sub.5 to C.sub.16 acids. |
| 4232137 |
Cooling an alpha-methylstyrene polymerization mass |
November 4, 1980 |
| An alpha-methylstyrene polymerization reaction mass is cooled by including therein a component which is readily vaporizable under the conditions of polymerization thereby to remove undesirable or excess heat, thus controlling the reaction temperature to a desired value. In one embodiment |
| 4223116 |
Conjugated diene polymerization process and catalyst |
September 16, 1980 |
| At least one conjugated diene is polymerized in the presence of a catalyzing amount of a catalyst consisting essentially of at least one Lewis acid and at least one cyclopolyolefin nickel complex. |
| 4174360 |
Coupling of alkali metal-terminated polymers |
November 13, 1979 |
| Alkali metal-terminated polymers of one or more alkadienes and of one or more vinyl-substituted aromatic monomers are effectively coupled by an anhydride of a monocarboxylic acid having 2 to 8 carbon atoms per molecule. |
| 4168286 |
Tetrablock polymers and their hydrogenated analogs |
September 18, 1979 |
| Tetrablock polymers having the configuration B--A.sub.1 --C--A.sub.2 and C--A.sub.1 --B--A.sub.2 and their hydrogenated counterparts are disclosed, wherein B is a low vinyl poly 1,3-butadiene block, A.sub.1 and A.sub.2 can be the same or different polymerized blocks of a monovinylarene m |
| 4163765 |
Polymeric compositions |
August 7, 1979 |
| Linear and branched teleblock copolymers having the configuration (A--B--C).sub.n Z and their hydrogenated derivatives are disclosed, wherein n is an integer from 2 to 4, Z is the residue of either a polyfunctional coupling agent or a polyfunctional initiator or is a covalent chemica |
| 4158654 |
Carboxylic acid in alkali metal carboxylate rubber solution |
June 19, 1979 |
| A mixture of a carboxylic acid and an alkali metal carboxylate-containing rubber in a vinyl monomer is provided. The resulting composition has a relatively low viscosity and is particularly adapted for preparing a thermosettable composition suitable for preparing reinforced plastic a |
| 4152370 |
Preparation, composition, and use of block polymers |
May 1, 1979 |
| Linear block copolymers having the formula A-B/A'-C and C-B/A'-A are prepared, wherein terminal block A is a poly(monovinylarene) block, terminal block C is a block of low vinyl poly(1,3-butadiene), having less than about 30 mole percent vinyl pendant groups, and the center block B/A' |
| 4134928 |
Tetrablock polydienes |
January 16, 1979 |
| Hydrogenated tetrablock polydienes such as polybutadiene-polyisoprene-polybutadiene-polyisoprene exhibit improved elongation as compared to both of the very similar hydrogenated triblock polydienes polybutadiene-polyisoprene-polybutadiene and polyisoprene-polybutadiene-polyisoprene. |
| 4113930 |
Hydrogenated 1,3-cyclohexadiene/1,3-butadiene copolymers |
September 12, 1978 |
| Hydrogenated 1,3-cyclohexadiene/1,3-butadiene copolymers having unexpectedly high green tensile strength are disclosed. The method for producing such hydrogenated copolymers is also disclosed. |
| 4076914 |
Treatment of coupled polymers prior to hydrogenation |
February 28, 1978 |
| An organopolyhalide-coupled conjugated diene polymer is treated with an organometal compound after the coupling step and prior to hydrogenation. The treated polymer is hydrogenated to result in hydrogenated polymers exhibiting low residual unsaturation. |
| 4057601 |
Block copolymers of alkadienes and monovinyl arenes |
November 8, 1977 |
| A copolymer having the formula A--B--C is disclosed, which becomes a thermoplastic elastomer after essentially all the olefinic unsaturation therein has been removed by hydrogenation. A is a low vinyl poly-1,3-butadiene block, C is a poly(monovinyl arene) block, and B is either a blo |
| 4055713 |
Iodine molecular weight regulators in suspension polymerization systems |
October 25, 1977 |
| Iodine or organic iodides are effective in suspension polymerization systems as molecular weight regulators or modifiers. These modifiers are especially suited for the suspension ABS processes. |
| 4049753 |
Coupling of alkali metal-terminated polymers |
September 20, 1977 |
| Alkali metal-terminated polymers of one or more alkadienes and of one or more vinyl-substituted aromatic monomers are effectively coupled by an anhydride of a monocarboxylic acid having 2 to 8 carbon atoms per molecule. |
| 4035570 |
Method and catalyst for the production of high trans-polyalkadiene |
July 12, 1977 |
| Polyalkadienes with high percentage of trans configurations are produced by employing a catalyst system obtained by admixing (A) at least one hydride having the general formula MZR.sub.a H.sub.(4-a) wherein M is lithium, sodium, potassium, rubidium or cesium, Z is aluminum or boron, R is |
| 3983187 |
Iodine molecular weight regulators in suspension polymerization systems |
September 28, 1976 |
| Iodine or organic iodides are effective in suspension polymerization systems as molecular weight regulators or modifiers. These modifiers are especially suited for the suspension ABS processes. |
| 3962195 |
Terpolymers of a furan, a maleic anhydride and one of a conjugated diene and a vinyl aromatic co |
June 8, 1976 |
| A furan, a maleic anhydride and at least one unsaturated compound selected from a conjugated diene, e.g., butadiene and a vinyl aromatic, e.g., styrene are reacted in presence of a free-radical initiator, e.g., an organic peroxide or azo compound for example di-t-butyl peroxide or 2, |
