인과 염소 함유 변성폴리에스터/이소시아네이트 가교 폴리머의 PU 난연도료에의 적용

• 영문명: Application of Isocyanate and Modified Polyester Containing Phosphorous and Chlorine to Crosslinked PU Flame-Retardant Coatings
• 발행기관: 한국응용과학기술학회 (구.한국유화학회)
• 저자명: 박홍수(Park HongSoo) 김송형(Kim SongHyoung) 안성환(Ahn SungHwan) 유규열(Yoo GyuYeol) 함현식(Hahm HyunSik)
• 간행물 정보: 『한국응용과학기술학회지』한국유화학회지 제24권 제2호, 124~139쪽, 전체 16쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 2007.03.31

영문 초록

In order to obtain the maximum flame retardancy with the minimal deterioration of physical properties of PU flame-retardant coatings, chlorine and phosphorous functional groups were introduced into the pre-polymer of modified polyesters. In the first step, the tetramethylene bis(orthophosphate) (TBOP) and neohexanediol dichloroacetate (DCA-adduct) intermediates were synthesized. In the second step, 1,4-butanediol and adipic acid monomers were polymerized with the two kind of intermediates to obtain copolymer. The modified polyesters containing chlorine and phosphorous (ATBA-10C, -20C, and -30C) were synthesized by adjusting the contents of chlorine compound (dichloroacetic acid, 10, 20, 30 wt%) with fixed the content of phosphorous compound (2 wt%). The PU flame-retardant coatings (TTBAH -10C, -20C, and -30C) were prepared using the synthesized ATBAs and HDI-trimer as curing agent at room temperature. The physical properties of PU flame-retardant coatings with chlorine and phosphorous were inferior to those with phosphorous only and the properties were getting worse with increasing chlorine content. Flame retardancy was tested with three methods. With the vertical method, Complete combustion time of ATBAHs were 259^{sim}347 seconds, which means that the prepared coatings are good flame-retardant. With the 45^{circ} Meckel burner method, char lengths of the three prepared coatings were less than 2.9 cm, which indicates that the prepared coatings are 1st grade flame retardancy. With the limiting oxygen index (LOI) method, the LOI values of the three prepared coatings were in the range of 30^{sim}35%, which proves good flame retardancy of the prepared coatings. From the results of flame retardancy tests of the specimens that contain the same amounts of flame retarding compounds, it was found that the coatings containing both phosphorous and chlorine show higher flame retardancy than the coatings containing phosphorous alone. This indicates that some synergy effect of flame retardancy exists between phosphorous and chlorine.

키워드

polyurethane flame retardant coatings phosphorous chlorine