U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Bizarre Patents

Patent No. 5285430

Behavior Modification Wristwatch

A wristwatch including a watch band and a watch body having an octagon shaped perimeter and being red in color and having the word STOP thereon to resemble a stop sign.

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 526/176 - Contains heavy metal atom


Subclass of Class 526 - Synthetic resins or natural rubbers -- part of the class 520 series
Definition: Subject matter wherein the specified material contains a
No. of patents: 56
Last issue date: 07/29/2008


1    
NumberTitleIssue Date
7405262Preparation of functionalized anionic polymerization initiators
A process for preparing a functionalized polymerization initiator, the process comprising combining a functionalized styryl compound and an organolithium compound. ...
07/29/2008
7351777Retarded anionic polymerization of vinyl aromatic monomers using insoluble or heterogeneous retardants
This invention is a process to manufacture high quality vinyl aromatic polymer that is essentially free of unreacted vinyl aromatic monomer using retarded anionic polymerization wherein the retardant is insoluble and can be removed from the polymerization at an inte...
04/01/2008
7321017Amine containing catalyst system and methods of use thereof
The present invention is directed to an amine containing catalyst system for synthesizing rubbery polymers, such as polybutadiene rubber and styrene-butadiene rubber, having a high trans microstructure. The catalyst system, in one embodiment, includes (a) an organol...
01/22/2008
7291687Catalyst system for synthesizing rubbery polymers having a high trans microstructure content
The present invention is directed to a catalyst system for synthesizing rubbery polymers, such as polybutadiene rubber and styrene-butadiene rubber, having a high trans microstructure. The catalyst system, in one embodiment, includes (a) a barium salt of an alcohol ...
11/06/2007
7285605Batch process for synthesizing rubbery polymers having a high trans microstructure content
The present invention is directed to a batch process for synthesizing rubbery polymers, such as styrene-butadiene rubber, having a high trans microstructure. In one embodiment, the batch process involves mixing a catalyst system with styrene and butadiene monomers i...
10/23/2007
7279531Rubbery polymers containing tin coupling agents and rubber compounds including the same
The present invention is directed to rubbery polymers, such as polybutadiene rubber or styrene-butadiene rubber, that contain tin coupling agents and provide desirable dispersion of carbon black in rubber compounds, such as for use in tire treads. The tin coupling a...
10/09/2007
7238844Olefin oligomerization
This invention is to a method of oligomerizing an olefin feed stream. The olefin feed stream contains at least one C2 to C12 olefin to obtain an olefin feed stream and has less than 1,000 ppm by weight oxygenated hydrocarbon. The olefin is olig...
07/03/2007
7205360Preparation process for block copolymers for tire tread compositions, and such copolymers
A preparation process for a copolymer having two blocks usable in a sulphur-cross-linkable rubber composition of reduced hysteresis in the cross-linked state, such a block copolymer in which one of the blocks is a polyisoprene and the other a diene elastomer other t...
04/17/2007
7189792Catalyst for synthesizing high trans polymers
The process and catalyst of this invention can be utilized to synthesize homo and copolymers of conjugated diene monomers and vinyl aromatic monomers having high trans contents of greater than 60% with low melting points. These homo and copolymers of conjugated dien...
03/13/2007
7125940Conjugated diene polymers and copolymer blocks and process for preparing same
Disclosed is a process for preparing polymers and copolymer blocks of conjugated dienes with varying amounts of branching comprising the use of a microstructure control agent and a microstructure control agent deactivant. The polymerization can be started with or wi...
10/24/2006
7048023Pneumatic tire having a component containing high trans styrene-butadiene rubber
The invention is directed to a pneumatic tire having at least one component comprising a vulcanizable rubber composition, wherein the vulcanizable rubber composition comprises, based on 100 parts by weight of elastomer (phr), from about 30 to 100 phr of high trans r...
05/23/2006
6800582Process of preparation of amino functionalized diene polymers, polymers of such type, rubber composition and tire casing containing those polymers
The present invention provides a process for preparing amino functionalized diene polymers with 1,4-trans linkage content equal to or greater than 70%. The invention also concerns polymers of such type, a rubber composition and a tire casing containing those polymer...
10/05/2004
6787661Tin-containing organolithium compounds and preparation thereof
The present invention relates to a tin-containing organolithium compound which can be used as anionic polymerization initiators, represented by the following formula (1): R4−xSn(Ya—Zm—Yb—Li)x
09/07/2004
6777511Process for producing poly (meth) acrylates having reduced metal content
An industrially excellent process for producing a poly(meth)acrylate having a reduced metal content which comprises contacting a mixture of a poly(meth)acrylate and an organic solvent with an acidic aqueous solution, such as an aqueous solution obtained by dissolvin...
08/17/2004
6767976Process for polymerizing a methacrylic ester or an acrylic ester
(1) A methacrylic ester or an acrylic ester is anionically polymerized, using a polymerization initiator compound comprising an addition reaction product of a conjugated diene compound and an organic alkali metal compound, in the presence of a tertiary organoaluminu...
07/27/2004
6758251Pneumatic tire having a component containing high trans styrene-butadiene rubber
The invention is directed to a pneumatic tire having at least one component comprising a vulcanizable rubber composition, wherein the vulcanizable rubber composition comprises, based on 100 parts by weight of elastomer (phr), from about 30 to 100 phr of high trans r...
07/06/2004
6703446Hetero-telechelic polymers and processes for making same
Hetero-telechelic polymers having the formula: wherein FG is a protected or non-protected functional group; Q is a saturated or unsaturated hydrocarbyl group derived by incorporation of a compound selected from the group consisting of conjugated diene hyd...
03/09/2004
6630554Process for polymerizing a methacrylic ester or an acrylic ester
(1) A methacrylic ester or an acrylic ester is anionically polymerized, using a polymerization initiator compound comprising an addition reaction product of a conjugated diene compound and an organic alkali metal compound, in the presence of a tertiary or...
10/07/2003
6627715Group IIa metal containing catalyst system
The group IIa metal containing catalyst system of this invention can be utilized to synthesize rubbery polymers having a high trans microstructure by solution polymerization. Such rubbery polymers having a high trans microstructure content, such as polybu...
09/30/2003
6455651Uniform initiation of anionic polymerization using organo-substituted alkali metal initiators
The present invention is an improvement in a method of anionically polymerizing monomers by contacting them with an anionic polymerization initiator which is an organo-substituted alkali metal compound in the presence of low amounts of an accelerator/prom...
09/24/2002
6410654Highly rigid, high-tenacity impact-resistant polystyrene
An anionically polymerized impact-modified polystyrene has a yield stress of at least 24 MPa, measured at 23° C. to DIN 53455 and a hole impact strength of at least 11 kJ/m2, measured at 23° C. to DIN 53753, measured in each case on a specime...
06/25/2002
6388032Cyclic olefin polymer containing little catalyst residue
A cyclic olefin polymer having a small content of a catalyst residue, a production process for the same and use of the same as an optical material. Catalysts used for polymerization and/or hydrogenation reaction for forming the cyclic olefin polymer are d...
05/14/2002
6329480Preparation process of acrylic acid ester polymer
A process for the preparation of an acrylic acid ester polymer, includes carrying out polymerization of an acrylic acid ester or block copolymerization of an acrylic acid ester and another (meth)acrylic monomer in the presence of an organolithium compound...
12/11/2001
6150487Multifunctional organic alkali metal initiator and its synthesis, anionic polymerized star polymers and their preparation
This invention relates to a multifunctional organic alkali metal initiator for the preparation of various kinds of star polymers by anionic polymerization, a process for making the initiator, a process using said initiator for making star polymers and the...
11/21/2000
6103842Process and catalyst system for synthesizing random trans SBR with low vinyl microstructure
The process and catalyst system of this invention can be utilized to synthesize a highly random styrene-butadiene rubber having a high trans content by solution polymerization. The styrene-butadiene rubber made by the process of this invention can be util...
08/15/2000
6103846Process for making anionic polymeric di-and polyfunctional polymers using protected functional initiators
The preparation of di- or polyfunctional polymers by anionic polymerization using functionalized initiators having the structure R1 R2 R3 Si--A--B, wherein each R is methyl and A is a hydrocarbon bridging group containing ...
08/15/2000
5936029Macrocyclic polymers having low hysteresis compounded properties
The present invention provides a method of anionic synthesis of stable macrocyclic polymers that are compounded to form vulcanizable elastomeric compounds exhibiting reduced hysteresis properties. Cyclic organometallic compounds containing divalent metal ...
08/10/1999
5900464Processes for making methacrylate and acrylate polymers
Polar polymers having the following formula: FG--(Q)d --Rn --Z--J--›A(R1 R2 R3)!x(I) wherein FG is H or a protected or non-protected functional group; Q is a polar hydrocarbyl group derived by incor...
05/04/1999
5877336Synthesis of tributyltin lithium
Triorgano substituted-tin lithium initiators are made in a dimethyl ether solvent. The substitution of dimethyl ether as the solvent for the traditional tetrahydrofuran solvent results in an initiator for anionic polymerizations that can produce less 1,2-...
03/02/1999
5849847Telechelic polystyrene/polyethylene copolymers and processes for making same
Polyalkenylaromatic-polyethylene copolymers are prepared using protected functional organolithium initiators. Polymerization of an alkenylsubstituted aromatic monomer followed by ethylene, results in a protected functional block polystyrene-co-polyethylen...
12/15/1998
5753579Trans microstructure directing initiator system
The process of this invention can be utilized to synthesize polymers having a high trans microstructure. The polymers which can be prepared utilizing the procedure of this invention include high trans-1,4-polybutadiene, styrene-isoprene-butadiene terpolym...
05/19/1998
5717043Process for preparing a polymer using lithium initiator prepared by in situ preparation
In a polymerization process of at least one of monomers selected from the group consisting of conjugated diene compounds such as butadiene and vinylaromatic compounds such as styrene, an organolithium compound such as butyllithium is added to the polymeri...
02/10/1998
5700888Synthesis of macrocyclic polymers having low hysteresis compounded properties
The present invention provides a method of anionic synthesis of stable macrocyclic polymers that are compounded to form vulcanizable elastomeric compounds exhibiting reduced hysteresis properties. Cyclic organometallic compounds containing divalent metal ...
12/23/1997
5637661Molecular weight regulator for anionic polymerizations
The subject invention discloses a technique for controlling the molecular weight of synthetic polymers which are made by anionic polymerization. This invention is based upon the discovery that the molecular weight of diene polymers made by anionic polymer...
06/10/1997
5587420Diene polymer obtained by adding a tin compound in the polymerization with an organolithium initiator
In one of several methods of producing polybutadiene or a butadiene-styrene copolymer with an organolithium initiator, an organotin compound such as tetraallyltin, tetrabenzyltin and tetraphenyltin is added to the polymerization system in a period of grow...
12/24/1996
5508363Preparation process of organosilicon compounds and production of silicon carbide
Disclosed herein are a novel process for the preparation of alkylsilanes and alkenyl silanes by hydrosilylation of their corresponding silanes and unsaturated hydrocarbons in the presence or absence of a catalyst, a process for the preparation of polyalke...
04/16/1996
5502129Triorganotin lithium, process to prepare same and anionic polymerization initiated therewith
Solutions of triorganotin lithium are described having low residual concentrations (preferably less than 2,000 ppm) of halide. These are produced by a two-step process. Triorganotin halide is reacted with lithium to produce hexaorgano ditin and a precipit...
03/26/1996
5463003Process for polymerizing conjugated dienes with lithium-tin-nitrogen initiators
A method for preparing a polymer having low hysteresis loss value and good breaking properties using a novel lithium initiator compound for polymerization of a conjugated diene and/or an aromatic vinyl hydrocarbon. Polymers produced in accordance with thi...
10/31/1995
5463004Process for polymerizing conjugated dienes with lithium-tin-nitrogen initiators
A method for preparing a polymer having low hysteresis loss value, good breaking properties and good processability with good productivity is provided by adding a tin compound during the propagation step of polymerization of a conjugated diene and/or an a...
10/31/1995
5268439Tin containing elastomers and products having reduced hysteresis properties
An anionic polymerization initiator comprising the reaction product of a an organatin halide and lithium in a suitable solvent. Elastomeric polymers prepared with these initiators have tin containing functional groups on substantially every polymer chain ...
12/07/1993
1    
 
Sign InRegister
Username  
Password   
forgot password?