摘要:
The invention relates to a process for the production of allyl or methallyl phosphonic acid dialkyl esters by reacting allyl chloride or methallyl chloride with trialkyl phosphites at temperatures of from 80.degree. to 160.degree. C in the presence of a compound of avalent and/or monovalent nickel or in the presence of a compound of avalent, monovalent or divalent cobalt.
摘要:
The present invention is directed to a reactive polyurethane mixture comprising:A) at least one polyisocyanate,B) a polyol mixture comprising:B1) at least one polyol containing three or more hydroxyl groups and having a molecular weight in the range from 800 to 6,000,B2) at least one polyol containing three or more hydroxyl groups and having a molecular weight in the range from 400 to 799 andB3) at least one polyol containing three or more hydroxyl groups and having a molecular weight in the range from 92 to 399, andC) at least one polyamine.
摘要:
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.
摘要:
Disclosed herein is a transparent adhesive containing isocyanate groups based on at least one polyol and at least one polyisocyanate, characterized in that the adhesive contains urea groups.
摘要:
The present invention is directed to a polyurethane reactive adhesive compound comprising:A) one or more polyisocyanates having an inactivated particle surface,B) at least one isocyanate reactive compound having a molecular weight MG.sub.w greater than 400, andC) finely dispersed polymer particles, wherein the polymer is solid at temperatures below 70.degree. C. and has a molecular weight MG.sub.w of at least 3000.
摘要:
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 with ether groups are stable in melts of aliphatic polyamides for prolonged periods at temperatures of up to about 300.degree. C. and filaments and fibers of such polyamides or woven fabrics, knitted fabrics, non-woven or pile fabrics produced from these filaments or fibers show outstanding antistatic properties.
摘要:
The invention relates to crosslinking isocyanates for polymeric adhesives containing a mixture of triisocyanatotriphenyl methane and trimerization products of 2,4-tolylene diisocyanate containing at least 50% triisocyanatomonoisocyanurate and less than 1% free tolylene diisocyanate.
摘要:
The invention relates to a copolymer comprising at least 40% by weight of copolymerized acrylonitrile and from 0.5 to 10% by weight of at least one copolymerized unsaturated ester of acetoacetic acid corresponding to the general formula:CH.sub.3 --CO--CH.sub.2 --COO--R--CR'.dbd.CH.sub.2and, optionally, at least one other copolymerized comonomer.
摘要:
The invention relates to a copolymer comprising at least 40% by weight of copolymerized acrylonitrile, from 0.5 to 40% by weight of at least one copolymerized aceto acetate of a mono (meth) acrylate of an aliphatic diol containing from 2 to 8 carbon atoms and, optionally, at least one other copolymerized comonomer.
摘要:
Composite anchors for use in concrete or masonry are described. The anchor is a rod sheathed in a material which has been impregnated with a moisture-curing polyurethane resin.