GB853354A - Improved polyamide manufacturing process - Google Patents
Improved polyamide manufacturing processInfo
- Publication number
- GB853354A GB853354A GB3962457A GB3962457A GB853354A GB 853354 A GB853354 A GB 853354A GB 3962457 A GB3962457 A GB 3962457A GB 3962457 A GB3962457 A GB 3962457A GB 853354 A GB853354 A GB 853354A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diamine
- acid
- hexamethylene
- aliphatic
- present
- 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
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
- C08G69/28—Preparatory processes
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyamides (AREA)
Abstract
In a process for the continuous manufacture of polyamides at substantially atmospheric pressure, a mixture of an aliphatic dicarboxylic acid and a volatile aliphatic or aralyphatic diamine is introduced into a heated reaction zone in which the concentration of diamine is maintained in more than stoichiometric proportion to the dicarboxylic acid present. Part of the diamine and all of the dicarboxylic acid may be present as a salt Specified diamines and dicarboxylic acids are hexamethylene diamine, decamethylene diamine, g -methyl hexamethylene diamine, m-and-p-xylylene diamine, adipic, sebacic and azelaic acid. Up to 40% by weight of the aliphatic acid may be replaced by an aromatic acid e.g. m- or p-phthalic acid. Modifying agents and additives which may be present in the reaction mixture include acetic acid, titanium dioxide, cadmium yellow, red iron oxide, phthalocyanines and carbon black. The examples describe the preparation of polymers from (1) aqueous hexamethylene diammonium adipate containing excess hexamethylene diamine and (2) hexamethylene diammonium sebacate containing excess hexamethylene diamine.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3962457A GB853354A (en) | 1957-12-20 | 1957-12-20 | Improved polyamide manufacturing process |
| FR782258A FR1223388A (en) | 1957-12-20 | 1958-12-20 | Continuous manufacturing process of polyamides under atmospheric pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3962457A GB853354A (en) | 1957-12-20 | 1957-12-20 | Improved polyamide manufacturing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB853354A true GB853354A (en) | 1960-11-02 |
Family
ID=10410581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3962457A Expired GB853354A (en) | 1957-12-20 | 1957-12-20 | Improved polyamide manufacturing process |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1223388A (en) |
| GB (1) | GB853354A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3278494A (en) * | 1961-02-28 | 1966-10-11 | British Nylon Spinners Ltd | Polymerization of plurality of aqueous solutions of polyamide-forming reactants witha continuously decreasing pressure |
-
1957
- 1957-12-20 GB GB3962457A patent/GB853354A/en not_active Expired
-
1958
- 1958-12-20 FR FR782258A patent/FR1223388A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3278494A (en) * | 1961-02-28 | 1966-10-11 | British Nylon Spinners Ltd | Polymerization of plurality of aqueous solutions of polyamide-forming reactants witha continuously decreasing pressure |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1223388A (en) | 1960-06-16 |
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