摘要:
A method of making a bio-based carpet material that includes the steps of: providing a griege goods having a top surface and a bottom surface; applying a pre-coat material to the bottom surface of the griege goods to form a pre-coated griege good; and applying a backing material to the bottom surface of the pre-coated griege good. The backing material includes the reaction product of a backing material A-side that has an isocyanate and a backing material B-side that has a transesterified blown vegetable oil which is the result of a heated combination of a blown vegetable oil, a multifunctional compound and a catalyst.
摘要:
The present invention includes a method for making a bio-based carpet material by providing tufts, a backing, a pre-coat, and a backing material wherein the pre-coat includes the reaction product of a pre-coat A-side having a pre-coat isocyanate and a pre-coat B-side and the backing material includes the reaction product of a backing material A-side having a backing material B-side. The pre-coat B-side and the backing material B-side may include a petroleum based polyol; a vegetable oil, cross-linker, and a catalyst; or a transesterified polyol.
摘要:
An ion mobility spectrometer includes a spectrometer housing (10) and, within the housing, an ion mobility spectrometer cell (12), a volume of vapour absorbent material (30), and a fan (38) for inducing a flow of recirculating cleaning air through the cell (12) and the absorbent material (30). The vapour absorbent material is held in close proximity with the cell, providing the possibility of constructing a miniature instrument without the need for any external air supply.
摘要:
The invention includes a process for preparing a flexible, water-blown polyurea foam by reacting a reaction mixture containing at least one polyisocyanate component and an active hydrogen component, wherein active hydrogen compounds of relatively high equivalent weight have an average of about 1.5 to about 4 active hydrogen-containing groups per molecule, of which active hydrogen-containing groups: an average of (a) from about 5 to about 60 percent are primary aliphatic amine groups or (b) at least about 25 percent are primary aromatic, secondary aliphatic, Lewis acid-blocked primary or secondary aliphatic or aromatic amine groups or mixtures of such groups. An amount of at least one alkali metal halide salt effective to increase load bearing strength of the foam is incorporated into the reaction mixture. Differing amounts of alkali metal halide salts are suitably incorporated into different areas of the foam to produce areas having differing load bearing strengths. The invention includes the foams formed by the processes of the invention as well as active hydrogen compositions containing the alkali metal halide salts and useful in the processes.
摘要:
Polyether active hydrogen compounds having at least two terminal active hydrogen groups on primary carbon atoms are prepared by (a) forming polyoxyalkylene molecules each having at least one active hydrogen precursor, (b) linking at least two of the polyoxyalkylene molecules, and (c) converting the active hydrogen precursor groups to active hydrogen groups on primary carbon atoms. The polyoxyalkylene molecule is formed by exposing a reaction mixture comprising at least one alkylene oxide and at least one protective initiator to conditions effective for the polymerization of the alkylene oxides. Linking is accomplished at polyether chain ends distal to the protected active hydrogen precursor groups, such that the active hydrogen precursors remain on the linked polyether chains until they are converted to active hydrogen groups. The process is particularly useful to produce polyether compounds having at least about 80 mole percent primary active hydrogen groups, which compounds are useful, for instance, in forming polyurethanes.
摘要:
A shampooing apparatus or device that is a portable, lightweight, and easily operated for providing automatic shampooing and/or conditioning. The apparatus comprises a body having a dispensing head and adapted to contain at least one but preferably two capsules one of which may contain a shampoo concentrate and the other a conditioner. The body receives these capsules and also receives liquid under pressure from a source of the liquid. In the two capsule version there are separate output ports that couple to a common entry port into a cylindrical cavity of the dispensing head. The dispensing head is of pulsating type including a rotor. In an alternate embodiment in place of the capsules are provided externally disposed containers for the conditioner and shampoo.
摘要:
An improved method for processing the effluent of a hydrocarbon conversion zone. The invention is particularly useful in a catalytic reforming reaction, wherein practice of the invention results in an increased recovery of butane and propane. The effluent is separated into vapor and liquid components, which are then recontacted at a higher pressure. Several recontacting steps may be employed. Liquid product is then subjected to fractionation. Overhead vapor from the fractionation zone is recycled back to a recontacting step in order to recover a portion of the hydrocarbons contained therein, instead of routing the vapor to the plant fuel gas system.
摘要:
A temperature insensitive voltage reference circuit for use between a voltage supply and an amplifier or comparator reference input is provided having a very small overall temperature coefficient value, approaching zero, over a wide operating range for stabilizing reference voltage with temperature. Preferably, a transistor is connected emitter to ground with its collector designated the circuit output to the reference input. An adjustable voltage divider may be connected between the voltage supply and the circuit output with the intermediate point connected to the base of the transistor.
摘要:
In a medical electronic thermometer system comprising a temperature sensing circuit for providing an analog signal representative of temperature being sensed, this temperature sensing circuit including a temperature transducer having a time lagged output; a voltage to rate converter responsive to the analog signal for providing uniform digital pulses at a repetition rate proportional to the temperature being sensed; and a digital decoder and display for displaying the temperature being sensed; an improved predictive circuit within the temperature sensing circuit for compensating for transducer lag and for enabling determination of ultimate temperature in advance of signal levels from the transducer indicative of such ultimate temperature, this predictive circuit generating a dual scale factor error curve.
摘要:
The present invention includes a polyol produced according to the process comprising reacting a multifunctional alcohol with a first multifunctional component to form a reaction product and reacting the reaction product with a vegetable oil to form a polyol. The present invention also relates to the material comprising the reaction product of an A-side and a B-side, wherein the A-side comprises an isocyanate and the B-side comprises the product formed by the process comprising the steps of reacting a multifunctional alcohol with a first multifunctional component to form a precursor polyol and then reacting the precursor polyol with a vegetable oil to form a vegetable based polyol with selectable functionality.