KOSEN 한인과학기술자네트워크

아래 자료들은 해외 상용 DB인 DIALOG를 통해 검색된 자료입니다. 아래 자료들을 참고해 보시기 바랍니다. Aqueous polyurethane dispersion technology: an update. RAMANATHAN L S Paintindia 1993, Vol 43 No 6, 58-67. 1993 Journal Announcement: 9401 WSCA Update Code: 9311 Document Type: Journal Language: English Section (Code,Heading): 21 Nitrogenous Polymers Section Code Cross-Reference: 35; Abstract: Early developments in aqueous polyurethane dispersion technology are briefly considered, followed by discussion of recent research work. Features of dispersions prepared by different techniques are summarised, factors affecting performance are considered, and improvements in mechanical properties of surface coatings are outlined. Advantages of urethane/acrylic blends or copolymer dispersions are noted. 33 refs. Descriptors: Polyurethanes; Dispersions, Aqueous Chemical Names: ACRYLIC; POLYURETHANE; URETHANE/ACRYLATE Identifiers: Polyurethanes-- dispersions (aq), review; Dispersions, Aqueous-- polyurethanes, review Additional Terms (Identifiers): cross-linking World Surface Coatings Abs (DialogR File 31): (c) 2001 Paint Research Assn. All rights reserved. Preparation and use of aqueous polyurethane dispersion coating compositions. Patent Assignee: BAYER AG; Patent Information: European Patent Application , 38 pp. Patent (Number,Date): EP 104377 Journal Announcement: 8409 WSCA Update Code: 8409 Document Type: Patent Language: German Section (Code,Heading): 36 Water-borne Paints and their Components Section Code Cross-Reference: 22; 64; Abstract: The compsns. are prepared from blocked polyisocyanate prepolymer, (cyclo)aliphatic polyamine and thickener. They have good brushability, and are suitable for use on leather or textiles. (In German) Descriptors: Dispersions, Aqueous; Polyurethanes; Leather; Textiles Chemical Names: POLYURETHANE; POLYISOCYANATE; POLYAMINE Identifiers: Dispersions, Aqueous-- polyurethanes, preparation; Polyurethanes-- dispersions (aqueous), preparation; Leather-- polyurethane coatings; Textiles-- polyurethane coatings Additional Terms (Identifiers): water-borne World Surface Coatings Abs (DialogR File 31): (c) 2001 Paint Research Assn. All rights reserved. Aqueous polyurethane dispersion production. Patent Assignee: DAI-ICHI SEIYAKU KOGYO CO; Patent Information: Japanese Unexamined Patent , 6 pp: Jap. Pat. Gaz. 1984, Vol 83 No 48, Gp G, 3-4. Patent (Number,Date): JP 58179234 19840000 Publication Year: 1984 Journal Announcement: 8406 WSCA Update Code: 8406 Document Type: Patent Language: Japanese Section (Code,Heading): 22 Nitrogenous Polymers Section Code Cross-Reference: 36; Abstract: A branch blocked water-sol. urethane prepolymer is unblocked by heating after addition of a base. Descriptors: Dispersions, Aqueous; Polyurethanes Chemical Names: URETHANE; POLYURETHANE Identifiers: Dispersions, Aqueous-- polyurethanes, from blocked; Polyurethanes-- dispersions (aqueous), from blocked World Surface Coatings Abs (DialogR File 31): (c) 2001 Paint Research Assn. All rights reserved. Manufacturing aqueous polyurethane dispersion. Patent Assignee: MOSCOW CHEM TECH Patent Information: Union Soviet Socialist Republics 5 pp: Soviet Invent. Ill. 1982, Vol E No 38, Gp G, 2. Patent (Number,Date): SU 883078 19820000 Publication Year: 1982 Journal Announcement: 8303 WSCA Update Code: 8300 Document Type: Patent Language: Russian Section (Code,Heading): 36 Water-borne Paints and their Components Abstract: Film-forming dispersions, e.g. for wood or metal coatings, are obtained by reacting an isocyanate-containing prepolymer and a chain extender in water in presence of an anionic emulsifier and an aliphatic alcohol. Descriptors: DISPERSIONS; POLYURETHANES Chemical Names: WATER; PREPOLYMER; ALCOHOL; ISOCYANATE-CONTAINING; POLYURETHANE Identifiers: MANUFACTURE OF AQUEOUS DISPERSIONS OF POLYURETHANES Additional Terms (Identifiers): EMULSIFIER; COATING (PRODUCT); CHAIN EXTENDER; FILM-FORMING; OBTAIN; MANUFACTURING; REACT; G; PRESENCE; WOOD; DISPERSION; ALIPHATIC; ANIONIC; METAL; AQ World Surface Coatings Abs (DialogR File 31): (c) 2001 Paint Research Assn. All rights reserved. Aqueous polyurethane dispersion. Patent Assignee: TOYOBO CO 9 pp: Jap. Pat. Gaz. 1981, Vol D No 49, Gp A, 10. Patent (Number,Date): JP 56135547 19810000 Publication Year: 1981 Journal Announcement: 8206 WSCA Update Code: 8200 Document Type: Patent Language: English Section (Code,Heading): 36 Water-borne Paints and their Components Abstract: The dispersion comprises a polyurethane obtained from a polyester-polyether containing metal sulphonate groups and a polyisocyanate, with water-miscible solvent and water. It is suitable for use in paints and printing inks. Descriptors: POLYURETHANES; POLYETHER-ESTERS; DISPERSIONS; PRINTING INKS Chemical Names: SULPHONATE; POLYURETHANE; POLYETHER-ESTER; POLYISOCYANATE; WATER Identifiers: POLYURETHANES FROM SULPHONATED POLYETHER-ESTERS; AQUEOUS DISPERSIONS FROM POLYURETHANES FROM SULPHONATED POLYETHER-ESTERS; AQUEOUS DISPERSIONS OF POLYURETHANES FROM SULPHONATED COMPOUNDS FOR PRINTING INKS Additional Terms (Identifiers): METAL; SUITABLE; OBTAIN; USE; GROUP; SOLVENT; PAINT; PRINTING INK; WATER-MISCIBLE; AQ; DISPERSION World Surface Coatings Abs (DialogR File 31): (c) 2001 Paint Research Assn. All rights reserved. 또한 http://ep.espacenet.com/를 통해서도 검색해 보시기 바랍니다. >저는 연세대학교 화학공학과 석사 과정의 학생입니다. >저는 MDI-based aqueous PUD를 제조하고 싶은데 이에 대한 자료나 정보가 있으면 가르쳐 주시면 대단히 감사하겠습니다.

>저는 연세대학교 화학공학과 석사 과정의 학생입니다. >저는 MDI-based aqueous PUD를 제조하고 싶은데 이에 대한 자료나 정보가 있으면 가르쳐 주시면 대단히 감사하겠습니다. 아래의 논문을 참고해 보시면. Airway symptoms and lung function in pipelayers exposed to thermal degradation products from MDI-based polyurethane, Occupational and Environmental Medicine, Volume 54, Issue 12, 1997, Pages 873-879 Jakobsson K.; Kronholm-Diab K.; Rylander L.; Hagmar L. Abstract Objectives - To study the prevalence of symptoms from the eyes and the upper and lower respiratory tract, lung function, and immunological sensitisation towards isocyanates in pipelayers exposed to thermal degradation products from methylene diphenyl diisocyanate (MDI)-based polyurethane (PUR). Material and methods - 50 presently active and 113 formerly active pipelayers were examined. Also, 65 unexposed workers were investigated for comparison. The one year prevalence of symptoms and smoking history (questionnaire data), lung function (vital capacity (VC)) and forced expiratory volume in one second (FEV1), and atopy (positive skin prick tests towards standard allergens) were assessed among pipelayers and controls. For the pipelayers, the presence of work related symptoms and estimates of isocyanate and welding exposure were obtained from an interview. Skin prick tests towards specific isocyanate antigens and determinations of IgE-MDI and IgG-MDI in serum were also performed. Results - The prevalence of episodes (more than once a month) of irritative eye symptoms, congestion of the nose, and soreness or dryness in the throat was much higher among the PUR pipelayers than among the controls. Most of the pipelayers with symptoms reported that these had started and occurred in relation to the PUR welding tasks. Presently active pipelayers with recent high PUR exposure showed a significant reduction of FEV1, compared with the controls. The estimated reduction, adjusted for smoking, was -0.3 l (P = 0.04). There was no confounding effect of ordinary welding. None of the pipelayers showed positive skin prick reactions against the specific isocyanate antigens used, or positive IgE-MDI, and only two had increased IgG-MDI. Conclusions - The findings indicate that exposure to thermal degradation products from MDI-based polyurethane has adverse effects on the mucous membranes and airways. Author Keywords: Methylene diphenyl diisocyanate; Respiratory disease; Construction industry Index Terms: respiratory tract disease; industrial worker; eye disease; polyurethan; isocyanic acid derivative