http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1423692-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b2925889434445edd00baf343872a4ae |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T442-2098 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S428-921 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T442-2689 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L61-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D06M15-431 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-53 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08L1-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D06M15-431 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08L1-00 |
| filingDate | 1973-06-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1976-02-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1423692-A |
| titleOfInvention | Fire retardant fabrics and method for preparation thereof |
| abstract | 1423692 Fire proofing textiles UNITED MERCHANTS & MFRS INC 27 June 1973 30588/73 Heading DIP A process for rendering a cellulose-containing fabric fire-retardant comprises: (a) impregnating the fibres thereof with an aminoplast precondensate, and (b) polymerising the precondensate while the fibres are in a wet and swollen state, thereafter (c) adjusting the pH of the fabric to a value greater than 7.0, (d) impregnating the fabric with a solution of tetrakis (hydroxymethyl) phosphonium hydroxide, and (e) curing, washing and drying the impregnated fabric. Intermediate steps (c) and (d), the fabric may be dried. Intermediate the curing and washing steps, the fabric may be subjected to a peroxidation step, e.g. involving treatment with hydrogen peroxide or sodium perborate. The aminoplast resin may be applied in an amount of from 2 to 25% based on the weight of the fabric by dipping or padding, and may be a water-soluble, hardenable aminoplast such as an optionally etherified aminotriazine resin e.g. methylated methylol melamine, or may be a colloidal intermediate product produced on further condensation beyond the crystalline methylol stage. The aminoplast solution may further contain an organic halogenated phosphorus-containing ester, e.g. tris (dibromopropyl) phosphate, tris (dichloropropyl) phosphate, tris (chlordbromopropyl) phosphate, or di (chloroethyl) chloroethyl phosphonate. In step (b) the polymerisation may be effected using acidic, latent acidic or oxidative catalysts while the fibres are e.g. wrapped in a moisture-proof plastic bag at ambient or elevated temperature. The polymerisation may be carried out under steam and/or under pressure. In step (c) the pH is preferably adjusted to 8.5 to 9.6, e.g. by addition of alkali. In step (d) the tetrakis (hydroxymethyl) phosphonium hydroxide is prepared by neutralisation of the chloride with sodium hydroxide, and is applied from a solution in water or alcohol preferably at a concentration of 10 to 35% by weight, by dipping, padding or spraying. The solution may further contain from I to 20% by weight of a nitrogenous compound such as urea, ethylene urea, propylene urea, guanidine, dicyandiamide, oxamide, thiourea or polyethylene imine. Curing is effected at an elevated temperature e.g. 300 to 400‹F for from 2 to 20 minutes, preferably 360‹F for 4 to 8 minutes. The resultant fabric preferably contains, by weight, from 1 to 3% phosphorus and from 3 to 6% nitrogen. Fabrics which may be treated include cotton, cotton/polyester, and fabrics made from regenerated cellulose, jute, manila, hemp, sisal and ramie. |
| priorityDate | 1972-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 69.