摘要:
The present invention relates to reactive preparations, comprising isocyanate-functional polyurethane building blocks, to a method for the production thereof, and to the use thereof as or in adhesives having high initial strength and high mechanical strength.
摘要:
The present invention relates to reactive preparations, comprising isocyanate-functional polyurethane building blocks, to a method for the production thereof, and to the use thereof as or in adhesives having high initial strength and high mechanical strength.
摘要:
The present invention relates to reactive polyurethane compositions having only small amounts of free, low molecular weight diisocyanates before and after crosslinking, and to the production thereof and the use thereof in reactive one- and two-component adhesives/sealants, bonding foams, encapsulating compounds and in flexible, rigid and integral foams.
摘要:
Polyisocyanate mixtures, their preparation by reacting aromatic polyisocyanate mixtures and nitrogen-containing polyetherol mixtures, and their use as an isocyanate component for the preparation of moisture-curing adhesives, said polyisocyanate mixtures comprising: (A) 15 to 35 wt. % of diphenylmethane diisocyanate with 2 aromatic rings; (3) 10 to 30 wt. % of polymeric diphenylmethane diisocyanate with 3 or more aromatic rings; and (C) 40 to 75 wt. % of an isocyanate-functional polyurethane; wherein the polyisocyanate mixture has an isocyanate content of 12 to 20 wt. %, an isocyanate functionality of >2.4, a viscosity of
摘要:
Polyisocyanate mixtures, their preparation by reacting aromatic polyisocyanate mixtures and nitrogen-containing polyetherol mixtures, and their use as an isocyanate component for the preparation of moisture-curing adhesives, said polyisocyanate mixtures comprising: (A) 15 to 35 wt. % of diphenylmethane diisocyanate with 2 aromatic rings; (3) 10 to 30 wt. % of polymeric diphenylmethane diisocyanate with 3 or more aromatic rings; and (C) 40 to 75 wt. % of an isocyanate-functional polyurethane; wherein the polyisocyanate mixture has an isocyanate content of 12 to 20 wt. %, an isocyanate functionality of >2.4, a viscosity of
摘要:
The invention relates to innovative viscosity stabilizers for hotmelts, to melt-viscosity-stable hotmelts comprising these viscosity stabilizers, to a process for preparing them and to their use.
摘要:
The invention relates to low-viscosity, low-monomer aqueous polymer dispersions based on polychloroprene, and a process for the preparation thereof and the use thereof as a contact adhesive.
摘要:
Holding device and method for holding an instrument. The holding device includes a housing, at least one holding arm having a mounting section coupled to a holding section through at least one offset lever section, and a resetting device structured and arranged to act eccentrically on the mounting section. The at least one holding arm is rotatable about a longitudinal axis of the mounting section.
摘要:
A numeric counter oscillator is disclosed comprising a quotient accumulator and a remainder accumulator. The quotient accumulator has a programmable input for receiving a QUOTIENT value, a reference clock input and a multi-bit output. The output is adapted for transmitting an output value OUT representing an accumulated quotient sum. The multi-bit output increments by a predetermined amount in response to each reference clock period. The remainder accumulator comprises programmable inputs for receiving respective REMAINDER and DIVISOR values, a a reference clock input and a multi-bit output representing an accumulated digital remainder sum less than a predefined digital integer. The remainder accumulator further comprises a comparator having a first input for receiving a programmed divisor value, and a second input for receiving the remainder accumulator multi-bit output. The comparator is operative to generate an increment carry signal for application to the quotient accumulator when the remainder multi-bit output reaches the predefined integer value.
摘要:
A pattern generator for use in a memory tester to provide packet address and data signals to a packet-based memory-under-test is disclosed. The pattern generator includes an address source for generating an external packet memory address signal. The external packet memory address signal represents a plurality of addressable memory elements in the memory-under-test. A plurality of data generators are disposed in parallel relationship and coupled to the output of the address source to receive at least a portion of the packet memory address signal. Each of the data generators has logic operative to derive an internal address from the packet address. The internal address corresponds to an individual memory element within the memory under test. A sequencer is disposed at the outputs of the data generators to distribute the data generator outputs in a packet waveform for application to the memory-under-test.