Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7388048 | Flexible semiaromatic polyamides with a low moisture uptake The present invention relates to a flexible semiaromatic polyamide composition with a low moisture uptake comprising, by weight, the total being 100: 60 to 99.5% (preferably 70 to 93%) of at least one copolyamide of formula X/Y,Ar ... | 06/17/2008 |
| 5728800 | Thermoplastic polyamide molding materials Thermoplastic molding materials contain A) from 5 to 94% by weight of a partly aromatic, semicrystalline copolyamide composed essentially of a1) from 30 to 44 mol % of units which are derived from terephthalic acid, a2) from 6 to 20 mol %... | 03/17/1998 |
| 5674973 | Continuous production of low molecular weight polyamides A process for the continuous production of polyamides from a mixture of at least one lactam and water and, if required, other monomer units and/or conventional additives and fillers under polyamide-forming conditions, where the mixture of the starting mat... | 10/07/1997 |
| 5371174 | Process for the production of polytetramethylene adipamides The invention relates to a process for the production of high-molecular-weight polytetramethylene adipamide from equivalent amounts of 1,4-diaminobutane and adipic acid at lower pressures. By supplying 1,4-diaminobutane at an advanced stage of the polycon... | 12/06/1994 |
| 5331061 | Thermoplastically processable elastomeric block copolyetheresteretheramides and processes for the production and use thereof Thermoplastically processable elastomeric block copolyetheresteretheramides from recurring units of the formula ##STR1## in which ##STR2## represents a polyamide segment containing terminal carboxyl groups and having an average molar mass o... | 07/19/1994 |
| 5326850 | Molding materials based on unsaturated copolyamides Molding materials are composed of A) from 40 to 100% by weight of a copolyamide based on a1) from 1 to 20 mol%, based on the copoly- amide, of at least one monomer that contains at least one olefinic double bond (monomers a1) from the gro... | 07/05/1994 |
| 5292857 | Preparation of nylon 66 polymers from 1,8-diazacyclotetradecane-2,7-dione Nylon 66 polymer is prepared by condensation of a reaction mixture containing 1,8-diazacyclotetradecane-2,7-dione and nylon 66 salt and/or caprolactam.... | 03/08/1994 |
| 5114521 | Method for producing a sliding coupling by a monomer casting method A method for producing a sliding coupling, w hich comprises injecting a casting material comprising the following components (A) and (B) into a clearance between a bearing and a shaft fitted in and rotatably or reciprocatively supported by the bearing, wh... | 05/19/1992 |
| 5041497 | Process for preparing co-poly(amides/peptides) A process for preparing a co-poly(amide/peptide) by reacting polymeric or oligomeric polypeptides and polymeric or oligomeric polyamides in the presence of an effective amount of one or more aryl phosphoryl azide compounds.... | 08/20/1991 |
| 5039784 | Process for an anionic melt polymerization of caprolactam with initiator, activator, coadjuvant and dispersing medium A process for the continuous and discontinuous production of polycaprolactam is disclosed which includes the step of polymerizing, by anionic polymerization, &3xb5;-caprolactam to which suitable initiators and activators are added. The process may optiona... | 08/13/1991 |
| 5001207 | Polyether-polyamide block copolymer and polyether prepolymer A polyether-polyamide block copolymer having an ethylenically unsaturated group represented by formula (I): ##STR1## wherein symbols are as defined in the specification; and a polyether prepolymer represented by formula (II): ##STR2## where... | 03/19/1991 |
| 4985534 | Polyetheramide hotmelt-adhesives This invention relates to modified polyetheramide hotmelt adhesives showing reduced melt viscosity and, optionally, better adhesive properties and to their use as ingredients for hotmelt adhesives.... | 01/15/1991 |
| 4943625 | Adhesive copolyamide composition based on phenylene containing diamine An adhesive copolyamide composition having a dry powder DSC melting point of at least 100° C., a glass transition temperature above 60° C., a dry powder softening point of at least 100° C., preferably a water content after storage in water of more than... | 07/24/1990 |
| 4649177 | Process for the preparation of nylon block polymers A process for preparing a nylon block copolymer which comprises bringing into reactive contact lactam monomer, basic lactam polymerization catalyst and a composition containing one or more lactam functional materials selected from the group represented by... | 03/10/1987 |
| 4609722 | Process for preparing substantially linear polyamide from N-alkylamide-substituted amine and aqueous ammonia N-alkylamide-substituted amines, such as nitrilotripropionamide, are either self-polymerized or copolymerized with other monomers, such as amino acids, in the presence of a stoichiometric amount of aqueous ammonia and at a temperature of at least 200° C.... | 09/02/1986 |
| 4590243 | Process for the preparation of nylon block polymers A process for preparing a nylon block polymer which comprises bringing into reactive contact lactam monomer, basic lactam polymerization catalyst and a composition containing one or more acyllactam functional materials selected from the group consisting o... | 05/20/1986 |
| 4568580 | Laminated packaging films and related articles of manufacture having improved resistance to heat treatment The invention relates to laminated films and articles of manufacture based on such films and having improved resistance to heat treatment, wherein said films comprise a heat sealing layer of copolyamide obtained by random copolymerization of precursor mon... | 02/04/1986 |
| 4496514 | Process using supercooled liquid lactam mixtures This invention relates to reaction injection molding of a mixture of lactams in presence of a catalyst and a promotor which is carried out by mixing at least two lactams in a liquid state with the catalyst and promoter before injecting the mixture into a ... | 01/29/1985 |
| 4455417 | Process to form amorphous, crystallizable thermoplastic polymers A method of forming an amorphous crystallizable thermoplastic polymer composition. The polymer composition has a modulus of rigidity which decreases to a minimum value with increasing temperature and then begins to increase. The process includes heating p... | 06/19/1984 |
| 4398012 | Transparent copolyamide from caprolactam, cyclic diamine and cyclic dicarboxylic acid This invention is a transparent alcohol resistant, hot water resistant, thermoplastically formable copolymer of (A) 80.4 to 88.8 weight percent epsilon-caprolactam and the remaining (B) 11.2 to 19.6 weight percent of substantially equimolar portions of a ... | 08/09/1983 |
| 4396759 | Method of adhering textiles What are disclosed are a polyamide polymer and its use as a melt adhesive for adhering textiles, said polymer having a melt viscosity, measured at 220° C., of 5-150 Pas and being the reaction product of approximately equivalent amounts of an acid compone... | 08/02/1983 |
| 4368318 | Preparation of dodecalactam polymers wherein molten monomer is filtered prior to polymerization The method for preparing polydodecanamide or copolymers based thereon according to the present invention involves melting of ω-dodecalactam or a mixture thereof with amide-forming monomers and polymerization of the resulting melt at a temperature ranging... | 01/11/1983 |
| 4345065 | Method for polymerizing pyrrolidone with preheating of catalyst solution An improved, consistent quality anionic catalyst for polymerizing pyrrolidone, optionally mixed with up to 25% of another copolymerizable lactam, is disclosed in which an alkali metal pyrrolidonate, prepared by reacting an alkali metal hydroxide or alkoxi... | 08/17/1982 |
| 4334056 | Method for polytropically precipitating polyamide powder coating compositions where the polyamides have at least 10 aliphatically bound carbon atoms per carbonamide group Polyamide powder coating compositions for the coating of metals at high temperatures are obtained by the precipitation method from polyamides having at least 10 aliphatically bound carbon atoms per carbonamide group, copolyamides having at least 70% of th... | 06/08/1982 |
| 4303778 | Method of anionic polymerization of ω-aminoacid lactams with alkali metal-Al,B-alkoxy lactamate initiator A method is described for the anionic polymerization and copolymerization of ω-aminoacid lactams. This end is attained at elevated temperatures in the presence of a polymerization initiator of the formula wherein Me is an alkali metal, Z is boron or aluminum,... | 12/01/1981 |
| 4297477 | Polyamide having --NH--(CH2)4 --CH(NRR')--CO--units Provided are polyamides having properties which make them useful as adhesives, sizing agents, paper strength enhancers and as resins. These polyamides are prepared by heating an alpha-(N,N-disubstituted amino)-E-caprolactam, alone or in combination with o... | 10/27/1981 |
| 4283524 | Process for polymerization of composition comprising (1) alpha,beta-unsaturated monocarboxylic acid or ammonium salt thereof and (2) ammonia Polymers containing amide linkages can be formed in good yields by the dehydrative addition polymerization of alpha, beta-unsaturated monocarboxylic acids or the ammonium salts thereof. These polymers are suitable for use as fibers, plastics, films and mo... | 08/11/1981 |
| 4229560 | Thermostable nitrogen containing heterocyclic polymers and process for producing A thermostable heterocyclic polymer constituted by monomer units of the general formula ##STR1## where R1 and R2 denote an organic radical having from 2 to 1000 carbon atoms; a radical having 2 to 1000 carbon atoms, containing: ... | 10/21/1980 |
| 4169936 | Crown ether and N-acyl pyrrolidone activated copolymerization of 2-pyrrolidone and caprolactam Processes for copolymerizing 2-pyrrolidone and caprolactam to yield a copolymer which can be formed into useful shaped articles, e.g., filaments. The processes are characterized by the use of both a crown ether and an N-acyl pyrrolidone activator and the ... | 10/02/1979 |
| 4163088 | Antistatic polyamide compositions with polyalkyleneglycol ether having secondary terminal urethane groups The invention relates to antistatic polyamide compositions comprising a polyamide and as an antistatic agent from 0.1 to 20%, preferably from 1.5 to 15%, by weight based on the total weight of the composition of urethanes with ether groups. The urethanes ... | 07/31/1979 |
| 4125519 | Polypeptides containing 3,4-dihydroxyphenylalanine Homopolymers and copolymers containing the amino acid 3,4-dihydroxy-L-phenylalanine (dopa) have been prepared via the synthesis of a protected N-carboxyanhydride (NCA) of the amino acid. These dopa-containing polymers have many uses as in the treatment of... | 11/14/1978 |
| 4111869 | Method for the polymerization of lactams The invention relates to a method for the cationic polymerization of lactams either substituted or unsubstituted on the lactam ring, which contain 6-16 carbon atoms, in the presence of 0.05 - 10 mol. % based on the lactam of an anhydrous salt of Cu, Zn, B... | 09/05/1978 |
| 4107154 | Anionic copolymerization of 2-pyrrolidone with C7 -C12 lactam Copolymers of 2-pyrrolidone and C7 -C12 lactams are provided in solid form, at relatively high rates and molecular weights by polymerization in the presence of alkaline catalysts and carbon dioxide, by the inclusion of an auxiliary c... | 08/15/1978 |
| 4092301 | Anionic polymerization of lactam with catalyst, activator and lithium halide A process by which transformations of linear polyamides are performed at temperatures below the melting and decomposition temperatures of pure polyamides, wherein anionic polymerization of dry lactams with 4 to 12 carbon atoms is performed in the presence... | 05/30/1978 |
| 4075182 | Process for the preparation of a catalyst containing pyrrolidone composition In the preparation of a catalyst for the alkaline-catalyzed polymerization of pyrrolidone, an alkali metal alkoxide is contacted with excess 2-pyrrolidone and the product alcohol is removed by passing an inert gas through the reaction mixture at high temp... | 02/21/1978 |
| 4073778 | Crown ether activated lactam polymerization The anionic polymerization of lactam is activated by the presence of crown ethers which are macrocyclic polyethers having the ability to form stable complexes with salts.... | 02/14/1978 |
| 4055552 | Hot-melt adhesives based on anionic terpolymers of lactams The invention relates to hot-melt adhesives based on anionic copolymers of lactams, where one of the starting lactams is 8.octanolactam in the amount of 10-90 mol.% and the other at least 2 lactams containing 6 or more 6 atoms in the ring are in the amoun... | 10/25/1977 |
| 4049638 | Manufacture of polylactams with initial pressures above vapor pressures of starting materials A process for continuous production of polyamides by continuous transport of a mixture of one or more lactams and from 1 to 15% and preferably from 3 to 8% of water and optionally other polyamide-forming compounds such as the salts of dicarboxylic acids a... | 09/20/1977 |
| 4046746 | Method for extracting granular polyamides and for preparing polyamide powders A method for extracting granular polyamides having at least 10 aliphatically bound carbon atoms per carbonamide group and a method for preparing polyamide powders from the extracted granular polyamides. The granular polyamides are extracted with dimethyl ... | 09/06/1977 |
| 4046747 | Additive for improving the adhesion to textiles of hot melt adhesives based on copolyamides Additives for textile hot melt adhesives based on copolyamides comprising, based on the total weight of copolyamide: A. 0.05 - 2 percent by weight of at least one acid amide of the general formula ##STR1## wherein R represents a saturated or unsatura... | 09/06/1977 |
