Abstract:
1. A PROCESS FOR THE MANUFACTURING OF ACRYLONITRILE/ UNSATURATED AZETIDINONE COPOLYMERS HAVING GRAFTED SIDE CHAINS WHICH COMPRISES HEATING TO A TEMPERATURE ABOVE 100*C. A COPOLYMER CONTAINING AT LEAST 35% LINEAR ACRYLONITRILE AND AXETIDINONE UNITS OF THE FORMULA (I)
-CH2-C(-R1)(-C(-R) WHERE R AND R1 ARE H OR CH3, IN THE PRESENCE OF AN ORGANIC COMPOUND CONTAINING AT LEAST ONE ACID GROUP IN THE MOLECULE CAPABLE OF FORMING AMIDE, THEREBY GRAFTING SAID ORGANIC COMPOUNDS ONTO SAID COPOLYMER.
Abstract:
NOVEL FILM AND FIBER-FORMING MODIFIED POLYAMIDES WITH AN INCREASED CONTENT OF AMINO GROUPS ARE OBTAINED, IF IN THE PREPARATION OF POLYAMIDES FROM THE COMMON STARTING COMPOUNDS POLYAMINES ARE ADDED WHICH HAVE PARTLY LINEAR ALIPHATIC, AND PARTLY CYCLO-ALIPHATIC AND, OPTIONALLY, AROMATIC STRUCTURAL UNITS IN THE MOLECULE-OPTIONALLY, IN ADMIXTURE WITH POLYAMINES HAVING PARTLY AROMATIC, AND PARTLY CYCLO-ALIPHATIC STRUCTURAL UNITS IN THE MOLECULE, AND/OR CYCLO-ALIPHATIC POLYAMINES WHICH MAY ALSO HAVE 1 ALIPHATIC C-ATOM EACH BETWEEN THE CYCLOALIPHATIC RINGS AND THE AMINO GROUPS.
AND THE LINKAGES OF THE RINGS ARE META- AND/OR PARA-LINKAG
AND, TO A SMALL EXTENT, ALSO ORTHO-LINKAGES. These polyami
are preferably prepared by desaminating hydrogenation of a
least one of the isomeric m- and p-xylylene diamines,
optionally in admixture with a small amount of o-xylylene
diamine; they are suitable, for example, as modification
components for the preparation of film and fiber-forming
polyamides.
IN WHICH N REPRESENTS A WHOLE NUMBER OF FROM 1 TO 10, PREFERABLY FROM 1 TO 3, R1 represents H or
R2 represents NH2 or
AND THE LINKAGES OF THE RINGS ARE META- AND/OR PARA-LINKAGES AND, TO A SMALL EXTENT, ALSO ORTHO-LINKAGES. These polyamines are preferably prepared by desaminating hydrogenation of at least one of the isomeric m- and p-xylylene diamines, optionally in admixture with a small amount of o-xylylene diamine; they are suitable, for example, as modification components for the preparation of film and fiber-forming polyamides. The rings in the said polyamines may also contain low molecular weight alkyl-substituted groups; this means, of course, that the starting substances for the preparation of the polyamines carry corresponding alkyl-substituents.
Abstract:
THE PRESENT INVENTION PROVIDES A PROCESS FOR THE MANUFACTURE OF FILAMENTS AND FIBERS FROM ACRYLONITRILE COPOLYMERS AND MODACRYLIC COPOLYMERS BY COPOLYMERIZING ACRYLONITRILE OR MIXTURES THEREOF WITH COMMON MODIFYING COMONOMERS WITH 0.5 TO 50% BY WEIGHT, CALCULATED ON THE MONOMER MIXTURE, OF N-SUBSTITUTED MALEINIMIDES AND SPINNING THE COPOLYMERS OBTAINED. THE FILAMENTS AND FIBERS OBTAINED ARE DISTINGUISHED BY A RAISED GLASS TRANSITION TEMPERATURE AND HENCE, AND IMPROVED DIMENSIONAL STABILITY AT ELEVATED TEMPERATURE, AND BY THEIR EXCELLENT DEGREE OF WHITENESS.
P REPRESENTS A WHOLE NUMBER OF FROM 1 TO 12, PREFERABLY FROM 2 TO 4, Q AND Q'' EQUAL 0 OR 1, M REPRESENTS A WHOLE NUMBER OF FROM 1 TO 10, PREFERABLY FROM 1 TO 2 (IF Q AND Q'' ARE 0) TO 4, THE LINKAGES OF THE RINGS ARE 1,3 AND/OR 1,4-LINKAGES, AND, OPTIONALLY, TO A SMALL EXTENT, ALSO 1,2-LINKAGES, AT LEAST HALF OF THE RINGS BEING CYCLO-ALIPHATIC, THE REST BEING AROMATIC. THE RINGS MAY ALSO BE SUBSTITUTED BY LOW MOLECULAR WEIGHT ALKYL GROUPS. THE POLYAMINES ARE SUITABLE, FOR EXAMPLE, AS MODIFICATION COMPONENTS FOR THE PREPARATION OF FILM AND FIBER-FORMING POLYAMIDES.
Abstract:
The invention relates to filaments and fibers spun from at least 98% by weight of polyacrylonitrile and relative viscosities of between 2.5 and 6.0 which have tensile strengths of more than 50 cN/tex with an elongation at break of at most 15% and a shrinkage at the boil of less than 5% and to a process for their production which comprises at least 2 stretching stages with a minimum stretching ratio of 1:9 as well as a concluding setting stage in which the filaments are treated without shrinkage in dry heat at 170 DEG to 280 DEG C. Such filaments and fibers are distinguished by an increased resistance to swelling and hydrolysis and they are particularly suitable for reinforcing organic and inorganic materials.
Abstract:
1326065 Polyamides FARBWERKE HOECHST AG 26 Aug 1970 [26 Aug 1969] 41032/70 Heading C3R The acid dye-receptivity of polyamides is enhanced by incorporating therein up to 10 wt. per cent of one or more polyamines contributing basic groups which is or include a polyamine of the formula where p is 1 to 12, q and q 1 are each 0 or 1, m is 1 to 10 and at least half the rings are cycloaliphatic. The polyamines are the subject of Specification 1,290,977. Other polyamines which may be used in conjunction therewith are those of formulµ where x is 0 to 30 and R 1 and R 11 are each H, CH 3 or C 2 H 5 , described in Canadian Specification 837,201, and which are the subject of Specification 1,294,984 and where use for the present purpose is claimed in Specification 1,326,064. In all the formulae the ring linkages are preferably m- and/or pwith not more than 10% o-. The polyamine may be incorporated with the polyamide forming starting materials, optionally together with up to 0À3% of a phosphorus acid or ester, or melted with the preformed polyamide. Specified polyamides are those derived from aminocaproic or undecanoic acid or their lactams and from salts of tetra-, hexa-, or octa-methylene diamine with glutaric, adipic, pimelic, suberic, azelaic or sebacic acid. The specified polyamines are stated to result in a more thermally stable polyamide than those previously proposed.
Abstract:
1326064 Polyamides FARBWERKE HOECHSTAG 26 Aug 1970 [26 Aug 1969] 41031/70 Heading C3R The acid-dye receptivity of polyamides is enhanced by incorporating therein up to 10 wt. per cent of one or more polyamines contributing basic groups which is, or include, a polyamine of the formula where n is 1 to 10, R 1 is H or and R 2 is NH 2 or Other polyamines which may be used in admixture therewith are those of the formulae where x is 0 to 30 and R 1 and R 11 are each H, CH 3 or C 2 H 5 . In all the formulae the ring linkages are preferably m- and/or p with not more than 10% o-. The polyamine may be incorporated with the polyamide-forming starting materials, optionally together with up to 0À3 wt. per cent of a phosphorous compound, or melted with the preformed polyamide. The essential polyamines may be prepared in accordance with Specification 1,294,984 and the optional polyamines in accordance with Canadian Specification 837,201. Specified polyamides are those derived from amino-caproic or undecanoic acid or their lactams and from salts of tetra-, hexa- or octa-methylene diamine with glutaric, adipic, pimelic, suberic, azelaic or sebacic acid. The specified polyamines are stated to give a more thermally stable polyamide than those previously proposed.