GB885405A - Improvements in or relating to polyurethane resins - Google Patents

Improvements in or relating to polyurethane resins

Info

Publication number
GB885405A
GB885405A GB3036457A GB3036457A GB885405A GB 885405 A GB885405 A GB 885405A GB 3036457 A GB3036457 A GB 3036457A GB 3036457 A GB3036457 A GB 3036457A GB 885405 A GB885405 A GB 885405A
Authority
GB
United Kingdom
Prior art keywords
linking agent
cross
polyester
glycol
acid
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
Application number
GB3036457A
Inventor
Leslie Nathan Phillips
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB3036457A priority Critical patent/GB885405A/en
Publication of GB885405A publication Critical patent/GB885405A/en
Expired legal-status Critical Current

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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
    • C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

Films and coatings on glass or glass fibre/polyester resin laminates are formed from a polyurethane product obtained by reacting (a) a polyurethane adduct derived from the reaction of (1) a water-free hydroxyl-terminated linear-polyester having an acid number of no greater than 5 with (2) an excess of a water-free organic diisocyanate having two reactive NCO groups, with (b) a cross-linking agent consisting of a tetrahydroxy polyol containing a tertiary nitrogen atom, said adduct and said cross-linking agent being combined in such stoichiometric proportions as to produce an approximate 1:1 ratio of hydroxy groups to NCO groups. After adding the cross-linking agent the mixture may be applied to the surface where drying and curing take place. As a primer there may first be applied to the surface a coating of a solution of an amine-hardenable epoxy resin. In examples the polyurethane compositions are prepared in toluene from glycol/adipic acid or glycol/sebacic acid polyesters; diisocyanato-diphenylmethane or tolylene or naphthalene diisocyanates; and N, N, N1, N1-tetrakis (2-hydroxypropylene)-ethylene diamine.ALSO:A process of forming a substantially bubble-free polyurethane product comprises reacting (a) a polyurethane adduct derived from the reaction of (1) a water-free hydroxyl-terminated linear polyester having an acid number of no greater than 5 with (2) an excess of a water-free organic diisocyanate having two reactive NCO groups, with (b) a cross-linking agent consisting of a tertrahydroxy polyol containing a tertiary nitrogen atom, said adduct and said cross-linking agent being combined in such stoichiometric proportions as to produce an approximate 1:1 ratio of hydroxy groups to NCO groups. After adding the cross-linking agent the mixture may be applied to form a film on a mould surface, where it cures rapidly. The amount of NCO groups in the product from reaction (1) is determined by refluxing with excess dibutylamine and back-titrating with hydrochloric acid. In Examples (1) an alkyd of acid no. 4.0 from the reaction of glycol and adipic acid in the presence of aluminium is reacted in toluene with excess tolylene diisocyanate and to the resulting mixture is added N, N, N1, N1-tetrakis (2-hydroxypropyl) ethylene diamine in ethyl acetate. Films of the mixture were dried at room temperature or at 100 DEG C. until cured; (2) a polyester from glycol and sebacic acid is reacted similarly; (3) a product from an adipic acid/glycol polyester, naphthalene diisocyanate and N, N, N1, N1-tetrakis (2-hydroxy-propylene) ethylene diamine, with acetyl chloride as inhibitor, is used to coat a glass fibre/polyester laminate; (4) in a process similar to (3) the adduct is prepared from polyethylene sebacate, p, p1 - diisocyanato - diphenylmethan and toluylene diisocyanate.
GB3036457A 1957-09-27 1957-09-27 Improvements in or relating to polyurethane resins Expired GB885405A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3036457A GB885405A (en) 1957-09-27 1957-09-27 Improvements in or relating to polyurethane resins

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3036457A GB885405A (en) 1957-09-27 1957-09-27 Improvements in or relating to polyurethane resins

Publications (1)

Publication Number Publication Date
GB885405A true GB885405A (en) 1961-12-28

Family

ID=10306493

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3036457A Expired GB885405A (en) 1957-09-27 1957-09-27 Improvements in or relating to polyurethane resins

Country Status (1)

Country Link
GB (1) GB885405A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2370763A1 (en) * 1976-11-12 1978-06-09 Nl Industries Inc CAST COMPOSITION IN POLYURETHANE NOT FORMING WICK

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2370763A1 (en) * 1976-11-12 1978-06-09 Nl Industries Inc CAST COMPOSITION IN POLYURETHANE NOT FORMING WICK

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