6.3.1 Silane-Modified Polymers

Silane-modified polymers (SMPs) or silyl-terminated polymers (STPs) possess an organic polymeric backbone (polyethers, PUs) terminated with reactive alkoxysilanes19. These adhesives are formulated with room temperature cure catalysts. SMPs start curing when exposed to atmospheric moisture and form an elastic crosslinked polymer. When the SMP has a polymeric backbone of polyethers, the system is known as a modified silicone (MS) polymer. When the polymeric backbone is PU-based, it is known as a silyl-modified polyurethane (SPUR) polymer; both are a subclass of SMPs as they have similar chemistry and features. SMPs combine the strength of PUs/polyether with the environmental resistance of silicones20. In addition to their high-performance properties, this product family has gained popularity due to its solvent-free and isocyanate-free nature. Because of the similarity of their polymer backbones, collectively, these polymers are generally referred to as SMPs. SMPs, upon curing, always release methanol or ethanol as a by-product; thus, they are neutral cure technology.

Table of contents

Already have an account? Sign in

+33,000
professionals

have already
signed up

Award winning manual

Platinum Award for LOCTITE®X Digital Manual

The Digital Manual is for professionals by professionals

The manual is made entirely for you. However, if you’re still not convinced that free industry knowledge is for you, take a look at these user testimonials from the users of the manual.

"The topics are such that I can help take design related decisions very well at work. It's an interesting and knowledgeable read, I recommended my other colleagues to have a look at the manual as well."

Hanumant, Production Incharge

"The manual's chapters significantly enhanced my comprehension of various engineering topics. The manual adeptly presents explanations and examples of concepts, showcasing a high level of clarity and effectiveness in its content."

Tejas, Mechanical Engineer from a renowned Engineering College

"The release of this manual by a renowned brand such as Loctite has proven to be highly motivating for students. Its authentic content serves as a source of inspiration, encouraging students to engage actively in reading and learning."

Padmakar Deshmukh, Professor at an Engineering College