Rigid urethane foams from hydroxymethylated castor oil, safflower oil, oleic safflower oil, and polyol esters of castor acids

Abstract

Castor, safflower, and oleic safflower oil derivatives with enhanced reactivity and hydroxyl group content were prepared by hydroformylation with a rhodium-triphenylphosphine catalyst, followed by hydrogenation. Rigid urethane foams prepared from these hydroxymethylated derivatives had excellent compressive strengths, closed cell contents, and dimensional stability. Best properties were obtained from hydroxymethylated polyol esters of castor acids. C H 3-( CH 2)z-C H-( CH 2 )y-CH-( CH 2 )x-C OOR 176 236 303 t-© t'~ 7~ t-ro © aRef. 5. bOn methyl esters, JXR silicone column programed from 180-260 C at 2 C/rain, flame ionization detector. Hydroformylated castor esters showed several peaks which were not identified. CPrepared by hydrogenation of hydroformylated products with Raney nickel at 100 C/1000 psig H 2. dOn acetate esters, eCalculated values for methyl hydroxymethylstearate = 170.5; methyl dihydroxymethylstearate = 312.5; methyl hydroxymethylhydroxystearate = 325. fEquivalent wt = 56,100/(hydroxyl value + acid value). < © r~

Seed Oil Based Polyurethanes: An Insight

“…The properties of SO polyols obtained by either method mentioned previously, also influence the properties of FAP. Hydroxylated, hydroxymethylated, carboxylated SO followed by their amidation yield polyols with higher number of hydroxyl groups with improved distribution [50][51][52][53][54][55][56]. These are ideal candidates to produce PU foams.…”

“…Alkanolamide polyols serve as excellent starting materials for PU foams [50][51][52][53][54][55][56]. The variations in fatty acid components of starting SO, number and position of hydroxyl groups and also the presence of dangling chains in the polyol confer differences in performance and cellular structures in PU foams.…”

“…However, in some examples, a part of epoxy content is lost during amidation reaction occurring at higher temperatures. Thus, it became imperative to determine ideal reaction conditions for amidation to retain maximum number of epoxidized rings, which was attempted by Lee et al and characterized by high performance liquid chromatography and gas chromatography [55,56].…”

Synthesis and Characterization of Soy-Based Polyurethane Foam with Utilization of Ethylene Glycol in Polyol

“…50%, two double bonds) and oleic acid (ca. 25%, one double bond) [7], oleic acid (22%), linoleic acid (55%), and linoleic acid (7%) [8], fielding an average number of 4.6 double bonds per molecule.…”

Study on the Change of Physical Properties in Polyurethane Foam by NCO index at the Aging Condition

“…하지만 석유자원 의 고갈과 온실가스의 배출과 같은 문제로 인해, 많은 연구원들과 기업에서는 풍부하고 값싼 식물성 오일과 같은 재생자원을 이용한 연구가 진행되고 있다 [2][3][4][5][6][7].…”