摘要:
Adducts, improved polymer-polyols and improved polyurethane foams are provided. The adducts are produced by reacting suitable polyol and epoxy co-reactant to essentially eliminate all epoxy groups. The polymer-polyol is produced by polymerizing suitable ethylenically unsaturated monomer in the adduct or in the adduct forming mixture, in the later case the adduct forming reaction and the polymerization reaction occur simultaneously to produce the polymer-polyol. Polyurethane foams are produced by the usual method but employing the novel adduct or polymer-polyol of the present invention.
摘要:
THE PREPARATION OF A NEW SERIES OF POLYOLS DERIVED FROM NAVEL STORES IS DESCRIBED AND THEIR USE IN POLYURETHANES IS DEMONSTRATED. SMALL AMOUNTS OF THESE RESIN ACID DERIVATIVES GIVE ADDED STRENGTH TO POLYURETHANE FILMS PREPARED FROM PROPYLENE GLYCOL POLYETHERS AND COULD VERY WELL BE USEFUL INTERMEDIATES FOR INDUSTRY. INCREASING AMOUNTS OF THESE NEW GLYCOLS BLENDED WITH TRIMETHLOLPROPANE, 1,4BUTANEDIOL, AND A POLYPROPYLENE GLYCOL AND REACTED WITH TDI GAVE CLEAR STRONG FILMS WITH TENSILE STRENGTHS AROUND 5000 P.S.I. FURTHER ADDITION RESULTED IN HARDER, MORE BRITTLE FILMS. BECAUSE OF THE BRITTLE CHARACTER OF MOST OF THE FILMS, USE OF THE POLYMERS PROBABLY WOULD BE LIMITED TO COATING APPLICATIONS. ON THE OTHER HAND, CHANGE IN THE FORMULATION IN ONE INSTANCE RESULTED IN FILMS HAVING FAIR LOW TEMPERATURE AND ELASTOMERIC PROPERTIES. THE DIISOCYANATE REQUIREMENTS ARE REDUCED WHEN THE POLYOLS ARE USED AS A COMPONENT OF THE GLYCOL SYSTEM.
摘要:
LIGHT-SENSITIVE POLYURETHANES ARE PREPARED BY REACTING (A) A POLYMER HAVING A FREE HYDROXYL GROUP IN THE RECURRING UNIT THEREOF WITH (B) AN ISOCVANATO-STILBENE OF THE FORMULA:
(LOWER ALKOXY)N,((OCN-PHENYL)-CH=CH-)BENZENE
WHEREIN N IS AN INTEGER FROM 1 TO 3. THE ABOVE POLYURETHANES UNDERGO CROSS-LINKING ON EXPOSURE TO ULTRAVIOLET LIGHT AND, ACCORDINGLY, CAN BE USED IN PHOTORESIST SYSTEMS.
摘要:
Provided is an optical fiber having a primary coating thereon wherein the coating is formulated from an ultra-violet light curable resin composition containing: (A) a polyether polyol compound containing, as structural units, groups represented by the following formulas (1), (2, and (3), (1) --CH.sub.2 CH.sub.2 O-- (2) --CH.sub.2 CH(R)O--, and (3) one or more groups selected from groups (a), (b), and (c) below, ##STR1## wherein R represents an alkyl group containing two or more carbon atoms, and R.sup.1 and R.sup.2 are independently selected from a hydrogen atom or a methyl group; (B) a polyisocyanate compound; and (C) a (meth)acrylate compound having a hydroxy group.
摘要:
The present invention is directed to polyethers obtained by the reaction of a substituted 1,2-epoxy-alkane bearing at least one alkyl substituent containing at least 8 carbon atoms with at least one polyol corresponding to the formulaR(OH).sub.x (1)whereinR is an organic radical andx is an integer having a value of 2 or more,2 or more moles of epoxyalkane being added onto the polyol (1).The present invention is also directed to a process for the preparation of high molecular weight polymers wherein the process is conducted in the presence of the previously described polyethers as a mold release agent.
摘要:
THE PREPARATION OF A NEW SERIES OF POLYOLS DERIVED FROM NAVAL STORES IS DESCRIBED AND THEIR USE IN POLYURETHANES IS DEMONSTRATED. SMALL AOHNTS OF THESE RESIN ACID DERIVATIVES GIVE ADDED STRENGTH TO POLYKTETHANE FILMS PREPARED FROM PROPYLENE GLYCOL POLYETHERS AND COULD VERY WELL BE USEFUL INTERMEDIATES FOT INDUSTRY. INCREASING AMOUNYS OF THESE NEW GLYCOLS BLENDED WITH TRIMETHYLOLPROPANE, 1,4BUTANEDIOL, AND A POLYPROPYLENE GLYCOL AND REACTED WITH TDI GAVE CLEAR STRONG FILMS WITH TENSILE STRENGTHS AROUND 5000 P.S.I. FURTHER ADDITION RESULTED IN HARDER, MORE BRITTLE FILMS. BECAUSE OF THE BRITTLE CHARACTER OF MOST MO FTHE FILMS, KUSE OF THE POLYMERS PROBABLY WOULD BE LIMITED TO COATING APPLICATIONS. ON THE OTHER HAND, CHANGE IN THE FORMULATION IN ONE INSTANCE RESULTED IN FILMS HAVING FAIR LOW TEMPERATURE AND ELASTOMERIC PROPERTIES. THE DIISOCYANATE REQUIREMENTS ARE REDUCED WHEN POLYOLS ARE USED AS A COMPONENT OF THE GLYCOL SYSTEM.
摘要:
Polyurethane which is reaction product of mixture comprising polyisocyanate and polymer-polyol comprising reaction product of polyol of average molecular weight of at least 500 and that is essentially free of ethylenic unsaturation, epoxy co-reactant essentially free of ethylenic unsaturation, and at least one ethylenically unsaturated monomer reactive with free hydroxyl groups of the polyol and which has been polymerized in the presence of said polyol and epoxy or of an adduct of the polyol and epoxy by free radical addition polymerization to a substantially linear polymer having a molecular weight of at least 5000.
摘要:
A process for the preparation of optionally cellular and non-cellular polyurethane elastomers, preferably by reaction injection molding, organic polyisocyanates, polyether polyols based on polyoxyalkylene polyether polyols with terminal hydroxyethylene groups and an ethoxylation degree of 1 to 13, having a content of primary hydroxyl groups at the corresponding degree of ethoxylation as the value of curve A to 100 percent with curve A describing the dependency of the primary hydroxyl group content upon the degree of ethoxylation are reacted with chain extenders and/or cross-linking agents in the presence of catalysts as well as optionally blowing agents, auxiliaries and additives.
摘要:
For the preparation of elastic flexible polyurethane foams with improved breaking elongation and very good setting behavior as well as densities from 7 to 120 grams per liter, organic polyisocyanates are reacted in the presence of blowing agents, catalysts and, optionally, auxiliaries and/or additives with polyols based on polyoxyalkylene polyols having terminal oxyethylene blocks of a degree of oxyethylation of 1 to 13 and which have a content of primary hydroxyl groups at the corresponding degree of oxyethylation equal or exceeding the value of curve A in the Figure in which curve A describing the relationship of the content of primary hydroxyl groups with the degree of oxyethylation.