Ads
related to: ppg polyurethane topcoat products for wood stain protection 2
Search results
Results from the WOW.Com Content Network
Pigments in paints and stains protect against UV damage. UV-absorbers are added to polyurethane and other varnishes (e.g. spar varnish) to work against UV damage but are decreasingly effective over the course of 2–4 years, depending on the quantity and quality of UV-absorbers added, as well as the severity and duration of sun exposure.
For example, the 3',5'-dimethoxybenzoin PPG (DMB) contains a 3,5-dimethoxyphenyl substituent on the carbonyl's α-carbon. [19] Under certain conditions, DMB has exhibited quantum yields as high as 0.64. [2] Additionally, the p-hydroxyphenacyl PPG (pHP) has been designed to react through a photo-Favorskii rearrangement.
Moisture cured polyurethane–urea coatings have been made by reacting 1,2,3-triazole rich polyether polyols with HMDI at NCO/OH eq. ratio of 1.2 to obtain isocyanate-terminated polyurethane prepolymers. The prepolymers were cured under atmospheric moisture to make polyurethane–urea free films.
For premium support please call: 800-290-4726 more ways to reach us
Polyurethane synthesis, wherein the urethane groups −NH−(C=O)−O− link the molecular units A kitchen sponge made of polyurethane foam . Polyurethane (/ ˌ p ɒ l i ˈ jʊər ə ˌ θ eɪ n,-j ʊəˈr ɛ θ eɪ n /; [1] often abbreviated PUR and PU) refers to a class of polymers composed of organic units joined by carbamate (urethane) links.
In 2007, PPG in Australia acquired Barloworld Coatings (Australia) Pty Limited, producer of the Taubmans, Bristol, and White Knight brands of paint. [10] On 2 January 2008, PPG acquired the SigmaKalon Group of companies for $3.2 billion from private investment firm Bain Capital, strongly increasing its paint and specialty coatings business. [11]
Ads
related to: ppg polyurethane topcoat products for wood stain protection 2