GB1250878A - - Google Patents
Info
- Publication number
- GB1250878A GB1250878A GB1250878DA GB1250878A GB 1250878 A GB1250878 A GB 1250878A GB 1250878D A GB1250878D A GB 1250878DA GB 1250878 A GB1250878 A GB 1250878A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- acids
- tere
- iso
- stated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/36—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino acids, polyamines and polycarboxylic acids
Abstract
1,250,878. Copolyamides. BP CHEMICALS (U.K.) Ltd. 15 Nov., 1968 [9 Dec., 1967], No. 56096/67. Heading C3R. At least 80 mol. per cent of the units of a copolyamide are derivable from (a) 12-aminododecanoid acid (b) m- or m/p-xylylene diamine containing not more than 30% p-isomer and (c) a dicarboxylic acid. The selection of the particular combination of (a), (b) and (c) is stated to give transparent amorphous polyamides of advantageous tensile strength. (c) may be one or more of adipic, azelaic, sebacic or dodecanedioic acid, iso- and tere-phthalic acids and their hydrogenation derivatives and phenylene diacetic acid. Optional comonomers mentioned are capro- and enantho-lactams and 5-aminohexanoic, 7-aminoenanthoic and 11- aminoundecanoic acids; and 2,2,4- or 2,4,4- trimethyl hexamethylene diamine or 3-aminomethyl-3,5,5-trimethyl cyclohexylamine. The components may be melt-condensed directly or with a precondensation step in the presence of 20 to 150 wt. per cent water under reflux conditions; alternatively an intermediate amide may be prepared by (b) or (c) with (a) at 200‹ to 250‹ C. in the presence of a catalyst before reaction with the remaining component(s). The process may be continuous. Monobasic acids or monoamines may be used as viscosity stabilizers with precautions to avoid discoloration. A colour stabilizer such as an inorganic, e.g. NH 4 , hypophosphite or a tri-hydrocarbyl phosphite may be added as may heat, oxidation and U.V. stabilizers. The polymers may have an inherent viscosity (0.15% solution in H 2 SO 4 at 25‹ C.) above 0.7. In examples the physical properties of copolymers of the invention wherein (c) is iso and/or tere-phthalated acid are compared with those of nylons 6, 12 and 66. In some examples the polymer is insoluble in H 2 SO 4 . The copolymer is stated to be suitable for various moulding techniques; coating, especially on metals, being applied as a powder with subsequent heating to form a coherent film; rigid foams; and fibres. Reference is made to Specification 1,250,877. Reference has been directed by the Comptroller to Specification 1,172,427.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB5609667 | 1967-12-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1250878A true GB1250878A (en) | 1971-10-20 |
Family
ID=10475716
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1250878D Expired GB1250878A (en) | 1967-12-09 | 1967-12-09 |
Country Status (5)
Country | Link |
---|---|
BE (1) | BE725178A (en) |
DE (1) | DE1813019A1 (en) |
FR (1) | FR1594164A (en) |
GB (1) | GB1250878A (en) |
NL (1) | NL6817107A (en) |
-
1967
- 1967-12-09 GB GB1250878D patent/GB1250878A/en not_active Expired
-
1968
- 1968-11-29 NL NL6817107A patent/NL6817107A/xx unknown
- 1968-12-06 FR FR1594164D patent/FR1594164A/fr not_active Expired
- 1968-12-06 DE DE19681813019 patent/DE1813019A1/en active Pending
- 1968-12-09 BE BE725178D patent/BE725178A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
FR1594164A (en) | 1970-06-01 |
BE725178A (en) | 1969-06-09 |
DE1813019A1 (en) | 1969-12-11 |
NL6817107A (en) | 1969-06-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |